1952 lines
62 KiB
C
1952 lines
62 KiB
C
/*
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* This file is distributed as part of the MariaDB Corporation MaxScale. It is free
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* software: you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation,
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* version 2.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Copyright MariaDB Corporation Ab 2013-2014
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*
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*/
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/**
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* @file gateway.c - The gateway entry point.
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*
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* @verbatim
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* Revision History
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*
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* Date Who Description
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* 23-05-2013 Massimiliano Pinto epoll loop test
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* 12-06-2013 Mark Riddoch Add the -p option to set the
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* listening port
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* and bind addr is 0.0.0.0
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* 19/06/13 Mark Riddoch Extract the epoll functionality
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* 21/06/13 Mark Riddoch Added initial config support
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* 27/06/13
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* 28/06/13 Vilho Raatikka Added necessary headers, example functions and
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* calls to log manager and to query classifier.
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* Put example code behind SS_DEBUG macros.
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* 05/02/14 Mark Riddoch Addition of version string
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* 29/06/14 Massimiliano Pinto Addition of pidfile
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*
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* @endverbatim
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*/
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#define _XOPEN_SOURCE 700
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#include <my_config.h>
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#include <ftw.h>
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#include <string.h>
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#include <strings.h>
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#include <gw.h>
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#include <unistd.h>
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#include <time.h>
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#include <getopt.h>
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#include <service.h>
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#include <server.h>
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#include <dcb.h>
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#include <session.h>
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#include <modules.h>
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#include <config.h>
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#include <poll.h>
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#include <housekeeper.h>
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#include <service.h>
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#include <memlog.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <mysql.h>
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#include <monitor.h>
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#include <version.h>
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#include <maxscale.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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# include <skygw_utils.h>
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# include <log_manager.h>
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#include <execinfo.h>
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/** for procname */
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#if !defined(_GNU_SOURCE)
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# define _GNU_SOURCE
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#endif
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extern char *program_invocation_name;
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extern char *program_invocation_short_name;
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/**
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* Variable holding the enabled logfiles information.
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* Used from log users to check enabled logs prior calling
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* actual library calls such as skygw_log_write.
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*/
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/** Defined in log_manager.cc */
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extern int lm_enabled_logfiles_bitmask;
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extern size_t log_ses_count[];
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extern __thread log_info_t tls_log_info;
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/*
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* Server options are passed to the mysql_server_init. Each gateway must have a unique
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* data directory that is passed to the mysql_server_init, therefore the data directory
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* is not fixed here and will be updated elsewhere.
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*/
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static char* server_options[] = {
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"MariaDB Corporation MaxScale",
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"--no-defaults",
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"--datadir=",
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"--language=",
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"--skip-innodb",
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"--default-storage-engine=myisam",
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NULL
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};
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const int num_elements = (sizeof(server_options) / sizeof(char *)) - 1;
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const char* default_cnf_fname = "etc/MaxScale.cnf";
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static char* server_groups[] = {
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"embedded",
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"server",
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"server",
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"embedded",
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"server",
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"server",
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NULL
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};
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/* The data directory we created for this gateway instance */
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static char datadir[PATH_MAX+1] = "";
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/* The data directory we created for this gateway instance */
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static char pidfile[PATH_MAX+1] = "";
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/**
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* exit flag for log flusher.
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*/
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static bool do_exit = FALSE;
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/**
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* Flag to indicate whether libmysqld is successfully initialized.
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*/
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static bool libmysqld_started = FALSE;
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/**
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* If MaxScale is started to run in daemon process the value is true.
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*/
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static bool daemon_mode = true;
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const char *progname = NULL;
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static struct option long_options[] = {
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{"homedir", required_argument, 0, 'c'},
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{"config", required_argument, 0, 'f'},
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{"nodaemon", no_argument, 0, 'd'},
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{"log", required_argument, 0, 'l'},
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{"version", no_argument, 0, 'v'},
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{"help", no_argument, 0, '?'},
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{0, 0, 0, 0}
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};
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static void log_flush_shutdown(void);
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static void log_flush_cb(void* arg);
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static int write_pid_file(char *); /* write MaxScale pidfile */
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static void unlink_pidfile(void); /* remove pidfile */
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static void libmysqld_done(void);
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static bool file_write_header(FILE* outfile);
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static bool file_write_footer(FILE* outfile);
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static void write_footer(void);
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static int ntfw_cb(const char*, const struct stat*, int, struct FTW*);
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static bool file_is_readable(char* absolute_pathname);
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static bool file_is_writable(char* absolute_pathname);
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static void usage(void);
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static char* get_expanded_pathname(
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char** abs_path,
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char* input_path,
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const char* fname);
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static void print_log_n_stderr(
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bool do_log,
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bool do_stderr,
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char* logstr,
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char* fprstr,
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int eno);
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static bool resolve_maxscale_conf_fname(
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char** cnf_full_path,
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char* home_dir,
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char* cnf_file_arg);
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static bool resolve_maxscale_homedir(
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char** p_home_dir);
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static char* check_dir_access(char* dirname);
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/**
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* Handler for SIGHUP signal. Reload the configuration for the
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* gateway.
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*/
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static void sighup_handler (int i)
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{
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LOGIF(LM, (skygw_log_write(
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LOGFILE_MESSAGE,
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"Refreshing configuration following SIGHUP\n")));
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config_reload();
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}
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/**
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* Handler for SIGUSR1 signal. A SIGUSR1 signal will cause
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* maxscale to rotate all log files.
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*/
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static void sigusr1_handler (int i)
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{
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LOGIF(LM, (skygw_log_write(
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LOGFILE_MESSAGE,
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"Log file flush following reception of SIGUSR1\n")));
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skygw_log_rotate(LOGFILE_ERROR);
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skygw_log_rotate(LOGFILE_MESSAGE);
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skygw_log_rotate(LOGFILE_TRACE);
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skygw_log_rotate(LOGFILE_DEBUG);
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}
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static void sigterm_handler (int i) {
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extern void shutdown_server();
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LOGIF(LE, (skygw_log_write_flush(
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LOGFILE_ERROR,
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"MaxScale received signal SIGTERM. Exiting.")));
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skygw_log_sync_all();
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shutdown_server();
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}
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static void
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sigint_handler (int i)
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{
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extern void shutdown_server();
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LOGIF(LE, (skygw_log_write_flush(
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LOGFILE_ERROR,
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"MaxScale received signal SIGINT. Shutting down.")));
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skygw_log_sync_all();
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shutdown_server();
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fprintf(stderr, "\n\nShutting down MaxScale\n\n");
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}
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int fatal_handling = 0;
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static int signal_set (int sig, void (*handler)(int));
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static void
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sigfatal_handler (int i)
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{
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if (fatal_handling) {
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fprintf(stderr, "Fatal signal %d while backtracing\n", i);
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_exit(1);
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}
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fatal_handling = 1;
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fprintf(stderr, "\n\nMaxScale received fatal signal %d\n", i);
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LOGIF(LE, (skygw_log_write_flush(
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LOGFILE_ERROR,
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"Fatal: MaxScale received fatal signal %d. Attempting backtrace.", i)));
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{
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void *addrs[128];
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int n, count = backtrace(addrs, 128);
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char** symbols = backtrace_symbols( addrs, count );
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if (symbols) {
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for( n = 0; n < count; n++ ) {
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LOGIF(LE, (skygw_log_write_flush(
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LOGFILE_ERROR,
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" %s\n", symbols[n])));
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}
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free(symbols);
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} else {
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fprintf(stderr, "\nresolving symbols to error log failed, writing call trace to stderr:\n");
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backtrace_symbols_fd(addrs, count, fileno(stderr));
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}
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}
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skygw_log_sync_all();
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/* re-raise signal to enforce core dump */
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fprintf(stderr, "\n\nWriting core dump\n");
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signal_set(i, SIG_DFL);
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raise(i);
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}
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/**
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* @node Wraps sigaction calls
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*
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* Parameters:
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* @param sig Signal to set
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* @param void Handler function for signal *
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*
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* @return 0 in success, 1 otherwise
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*
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*
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* @details (write detailed description here)
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*
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*/
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static int signal_set (int sig, void (*handler)(int)) {
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static struct sigaction sigact;
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static int err;
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int rc = 0;
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memset(&sigact, 0, sizeof(struct sigaction));
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sigact.sa_handler = handler;
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GW_NOINTR_CALL(err = sigaction(sig, &sigact, NULL));
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if (err < 0)
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{
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int eno = errno;
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errno = 0;
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LOGIF(LE, (skygw_log_write_flush(
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LOGFILE_ERROR,
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"Error : Failed call sigaction() in %s due to %d, %s.",
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program_invocation_short_name,
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eno,
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strerror(eno))));
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rc = 1;
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}
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return rc;
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}
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/**
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* Cleanup the temporary data directory we created for the gateway
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*/
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int ntfw_cb(
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const char* filename,
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const struct stat* filestat,
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int fileflags,
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struct FTW* pfwt)
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{
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int rc = remove(filename);
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if (rc != 0)
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{
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int eno = errno;
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errno = 0;
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LOGIF(LE, (skygw_log_write(
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LOGFILE_ERROR,
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"Error : Failed to remove the data directory %s of "
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"MaxScale due to %d, %s.",
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datadir,
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eno,
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strerror(eno))));
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}
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return rc;
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}
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void datadir_cleanup()
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{
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int depth = 1;
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int flags = FTW_CHDIR|FTW_DEPTH|FTW_MOUNT;
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int rc;
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if (datadir[0] != 0 && access(datadir, F_OK) == 0)
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{
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rc = nftw(datadir, ntfw_cb, depth, flags);
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}
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}
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static void libmysqld_done(void)
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{
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if (libmysqld_started) {
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mysql_library_end();
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}
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}
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static void write_footer(void)
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{
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file_write_footer(stdout);
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}
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static bool file_write_footer(
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FILE* outfile)
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{
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bool succp = false;
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size_t wbytes1;
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size_t len1;
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const char* header_buf1;
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header_buf1 = "------------------------------------------------------"
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"\n\n";
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len1 = strlen(header_buf1);
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wbytes1=fwrite((void*)header_buf1, len1, 1, outfile);
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succp = true;
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return succp;
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}
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static bool file_write_header(
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FILE* outfile)
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{
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bool succp = false;
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size_t wbytes1;
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size_t wbytes2;
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size_t wbytes3;
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size_t len1;
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size_t len2;
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size_t len3;
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const char* header_buf1;
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char* header_buf2 = NULL;
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const char* header_buf3;
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time_t* t = NULL;
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struct tm* tm = NULL;
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#if defined(LAPTOP_TEST)
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struct timespec ts1;
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ts1.tv_sec = 0;
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ts1.tv_nsec = DISKWRITE_LATENCY*1000000;
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#endif
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#if !defined(SS_DEBUG)
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return true;
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#endif
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if ((t = (time_t *)malloc(sizeof(time_t))) == NULL) {
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goto return_succp;
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}
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if ((tm = (struct tm *)malloc(sizeof(struct tm))) == NULL) {
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goto return_succp;
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}
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*t = time(NULL);
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*tm = *localtime(t);
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header_buf1 = "\n\nMariaDB Corporation MaxScale " MAXSCALE_VERSION "\t";
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header_buf2 = strdup(asctime(tm));
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if (header_buf2 == NULL) {
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goto return_succp;
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}
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header_buf3 = "------------------------------------------------------\n";
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len1 = strlen(header_buf1);
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len2 = strlen(header_buf2);
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len3 = strlen(header_buf3);
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#if defined(LAPTOP_TEST)
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nanosleep(&ts1, NULL);
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#else
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wbytes1=fwrite((void*)header_buf1, len1, 1, outfile);
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wbytes2=fwrite((void*)header_buf2, len2, 1, outfile);
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wbytes3=fwrite((void*)header_buf3, len3, 1, outfile);
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#endif
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succp = true;
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return_succp:
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if (tm != NULL) {
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free(tm);
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}
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if (t != NULL) {
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free(t);
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}
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if (header_buf2 != NULL) {
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free(header_buf2);
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}
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return succp;
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}
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static bool resolve_maxscale_conf_fname(
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char** cnf_full_path,
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char* home_dir,
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char* cnf_file_arg)
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{
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bool succp = false;
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if (cnf_file_arg != NULL)
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{
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char* home_etc_dir;
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/*<
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* 1. argument is valid full pathname
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* '- /home/jdoe/MaxScale/myconf.cnf'
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*/
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if (file_is_readable(cnf_file_arg))
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{
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*cnf_full_path = cnf_file_arg;
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succp = true;
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goto return_succp;
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}
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/*<
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* 2. argument is file name only and file is located in home
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* directory.
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* '-f MaxScale.cnf'
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*/
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home_etc_dir = (char*)malloc(strlen(home_dir)+strlen("/etc")+1);
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snprintf(home_etc_dir,
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strlen(home_dir)+strlen("/etc")+1,
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"%s/etc",
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home_dir);
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*cnf_full_path = get_expanded_pathname(NULL,
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home_etc_dir,
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cnf_file_arg);
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free(home_etc_dir);
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if (*cnf_full_path != NULL)
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{
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if (file_is_readable(*cnf_full_path))
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{
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succp = true;
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goto return_succp;
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}
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else
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{
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char* logstr = "Found config file but wasn't "
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"able to read it.";
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int eno = errno;
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print_log_n_stderr(true, true, logstr, logstr, eno);
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goto return_succp;
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}
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}
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else
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{
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/** Allocate memory for use of realpath */
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*cnf_full_path = (char *)malloc(PATH_MAX+1);
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}
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/*<
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* 3. argument is valid relative pathname
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* '-f ../myconf.cnf'
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*/
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if (realpath(cnf_file_arg, *cnf_full_path) != NULL)
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{
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if (file_is_readable(*cnf_full_path))
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{
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succp = true;
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goto return_succp;
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}
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else
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{
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char* logstr = "Failed to open read access to "
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"config file.";
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int eno = errno;
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print_log_n_stderr(true, true, logstr, logstr, eno);
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goto return_succp;
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}
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}
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else
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{
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char* logstr = "Failed to expand config file name to "
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"complete path.";
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int eno = errno;
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errno = 0;
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print_log_n_stderr(true, true, logstr, logstr, eno);
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goto return_succp;
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}
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}
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else /*< default config file name is used */
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{
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*cnf_full_path = get_expanded_pathname(NULL, home_dir, default_cnf_fname);
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if (*cnf_full_path != NULL)
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{
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if (file_is_readable(*cnf_full_path))
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{
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succp = true;
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goto return_succp;
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}
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else
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{
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char* logstr = "Found config file but wasn't "
|
|
"able to read it.";
|
|
int eno = errno;
|
|
print_log_n_stderr(true, true, logstr, logstr, eno);
|
|
goto return_succp;
|
|
}
|
|
}
|
|
goto return_succp;
|
|
}
|
|
return_succp:
|
|
return succp;
|
|
}
|
|
|
|
|
|
static bool resolve_maxscale_homedir(
|
|
char** p_home_dir)
|
|
{
|
|
bool succp = false;
|
|
char* tmp;
|
|
char* tmp2;
|
|
char* log_context = NULL;
|
|
|
|
ss_dassert(*p_home_dir == NULL);
|
|
|
|
if (*p_home_dir != NULL)
|
|
{
|
|
log_context = strdup("Command-line argument");
|
|
tmp = NULL;
|
|
goto check_home_dir;
|
|
}
|
|
/*<
|
|
* 1. if home dir wasn't specified by a command-line argument,
|
|
* read env. variable MAXSCALE_HOME.
|
|
*/
|
|
if (getenv("MAXSCALE_HOME") != NULL)
|
|
{
|
|
tmp = strndup(getenv("MAXSCALE_HOME"), PATH_MAX);
|
|
get_expanded_pathname(p_home_dir, tmp, NULL);
|
|
|
|
if (*p_home_dir != NULL)
|
|
{
|
|
log_context = strdup("MAXSCALE_HOME");
|
|
goto check_home_dir;
|
|
}
|
|
free(tmp);
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr, "\n*\n* Warning : MAXSCALE_HOME environment variable "
|
|
"is not set.\n*\n");
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Warning : MAXSCALE_HOME environment "
|
|
"variable is not set.")));
|
|
}
|
|
/*<
|
|
* 2. if home dir wasn't specified in MAXSCALE_HOME,
|
|
* try access /etc/MaxScale/
|
|
*/
|
|
tmp = strdup("/etc/MaxScale");
|
|
get_expanded_pathname(p_home_dir, tmp, NULL);
|
|
|
|
if (*p_home_dir != NULL)
|
|
{
|
|
log_context = strdup("/etc/MaxScale");
|
|
goto check_home_dir;
|
|
}
|
|
free(tmp);
|
|
/*<
|
|
* 3. if /etc/MaxScale/MaxScale.cnf didn't exist or wasn't accessible, home
|
|
* isn't specified. Thus, try to access $PWD/MaxScale.cnf .
|
|
*/
|
|
tmp = strndup(getenv("PWD"), PATH_MAX);
|
|
tmp2 = get_expanded_pathname(p_home_dir, tmp, default_cnf_fname);
|
|
free(tmp2); /*< full path isn't needed so simply free it */
|
|
|
|
if (*p_home_dir != NULL)
|
|
{
|
|
log_context = strdup("Current working directory");
|
|
}
|
|
|
|
check_home_dir:
|
|
if (*p_home_dir != NULL)
|
|
{
|
|
if (!file_is_readable(*p_home_dir))
|
|
{
|
|
char* tailstr = "MaxScale doesn't have read permission "
|
|
"to MAXSCALE_HOME.";
|
|
char* logstr = (char*)malloc(strlen(log_context)+
|
|
1+
|
|
strlen(tailstr)+
|
|
1);
|
|
snprintf(logstr,
|
|
strlen(log_context)+
|
|
1+
|
|
strlen(tailstr)+1,
|
|
"%s:%s",
|
|
log_context,
|
|
tailstr);
|
|
print_log_n_stderr(true, true, logstr, logstr, 0);
|
|
free(logstr);
|
|
goto return_succp;
|
|
}
|
|
|
|
#if WRITABLE_HOME
|
|
if (!file_is_writable(*p_home_dir))
|
|
{
|
|
char* tailstr = "MaxScale doesn't have write permission "
|
|
"to MAXSCALE_HOME. Exiting.";
|
|
char* logstr = (char*)malloc(strlen(log_context)+
|
|
1+
|
|
strlen(tailstr)+
|
|
1);
|
|
snprintf(logstr,
|
|
strlen(log_context)+
|
|
1+
|
|
strlen(tailstr)+1,
|
|
"%s:%s",
|
|
log_context,
|
|
tailstr);
|
|
print_log_n_stderr(true, true, logstr, logstr, 0);
|
|
free(logstr);
|
|
goto return_succp;
|
|
}
|
|
#endif
|
|
if (!daemon_mode)
|
|
{
|
|
fprintf(stderr,
|
|
"Using %s as MAXSCALE_HOME = %s\n",
|
|
log_context,
|
|
tmp);
|
|
}
|
|
succp = true;
|
|
goto return_succp;
|
|
}
|
|
|
|
return_succp:
|
|
free (tmp);
|
|
|
|
|
|
if (log_context != NULL)
|
|
{
|
|
free(log_context);
|
|
}
|
|
|
|
if (!succp)
|
|
{
|
|
char* logstr = "MaxScale was unable to locate home directory "
|
|
"with read and write permissions. \n*\n* Exiting.";
|
|
print_log_n_stderr(true, true, logstr, logstr, 0);
|
|
usage();
|
|
}
|
|
return succp;
|
|
}
|
|
|
|
/**
|
|
* Check read and write accessibility to a directory.
|
|
* @param dirname directory to be checked
|
|
*
|
|
* @return NULL if directory can be read and written, an error message if either
|
|
* read or write is not permitted.
|
|
*/
|
|
static char* check_dir_access(
|
|
char* dirname)
|
|
{
|
|
char* errstr = NULL;
|
|
|
|
if (dirname == NULL)
|
|
{
|
|
errstr = strdup("Directory argument is NULL");
|
|
goto retblock;
|
|
}
|
|
|
|
if (!file_is_readable(dirname))
|
|
{
|
|
errstr = strdup("MaxScale doesn't have read permission "
|
|
"to MAXSCALE_HOME.");
|
|
goto retblock;
|
|
}
|
|
|
|
if (!file_is_writable(dirname))
|
|
{
|
|
errstr = strdup("MaxScale doesn't have write permission "
|
|
"to MAXSCALE_HOME. Exiting.");
|
|
goto retblock;
|
|
}
|
|
|
|
retblock:
|
|
return errstr;
|
|
}
|
|
|
|
|
|
/**
|
|
* @node Provides error printing for non-formatted error strings.
|
|
*
|
|
* @param do_log Specifies whether printing to log is enabled
|
|
*
|
|
* @param do_stderr Specifies whether printing to stderr is enabled
|
|
*
|
|
* @param logstr String to be printed to log
|
|
*
|
|
* @param fprstr String to be printed to stderr
|
|
*
|
|
* @param eno Errno, if it is set, zero, otherwise
|
|
*/
|
|
static void print_log_n_stderr(
|
|
bool do_log, /*< is printing to log enabled */
|
|
bool do_stderr,/*< is printing to stderr enabled */
|
|
char* logstr, /*< string to be printed to log */
|
|
char* fprstr, /*< string to be printed to stderr */
|
|
int eno) /*< errno, if it is set, zero, otherwise */
|
|
{
|
|
char* log_err = "Error :";
|
|
char* fpr_err = "*\n* Error :";
|
|
char* fpr_end = "\n*\n";
|
|
|
|
if (do_log) {
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"%s %s %s %s",
|
|
log_err,
|
|
logstr,
|
|
eno == 0 ? " " : "Error :",
|
|
eno == 0 ? " " : strerror(eno))));
|
|
}
|
|
if (do_stderr) {
|
|
fprintf(stderr,
|
|
"%s %s %s %s %s",
|
|
fpr_err,
|
|
fprstr,
|
|
eno == 0 ? " " : "Error :",
|
|
eno == 0 ? " " : strerror(eno),
|
|
fpr_end);
|
|
}
|
|
}
|
|
|
|
static bool file_is_readable(
|
|
char* absolute_pathname)
|
|
{
|
|
bool succp = true;
|
|
|
|
if (access(absolute_pathname, R_OK) != 0)
|
|
{
|
|
int eno = errno;
|
|
errno = 0;
|
|
|
|
if (!daemon_mode)
|
|
{
|
|
fprintf(stderr,
|
|
"*\n* Warning : Failed to read the configuration "
|
|
"file %s. %s.\n*\n",
|
|
absolute_pathname,
|
|
strerror(eno));
|
|
}
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Warning : Failed to read the configuration file %s due "
|
|
"to %d, %s.",
|
|
absolute_pathname,
|
|
eno,
|
|
strerror(eno))));
|
|
succp = false;
|
|
}
|
|
return succp;
|
|
}
|
|
|
|
static bool file_is_writable(
|
|
char* absolute_pathname)
|
|
{
|
|
bool succp = true;
|
|
|
|
if (access(absolute_pathname, W_OK) != 0)
|
|
{
|
|
int eno = errno;
|
|
errno = 0;
|
|
|
|
if (!daemon_mode)
|
|
{
|
|
fprintf(stderr,
|
|
"*\n* Error : unable to open file %s for write "
|
|
"due %d, %s.\n*\n",
|
|
absolute_pathname,
|
|
eno,
|
|
strerror(eno));
|
|
}
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : unable to open file %s for write due "
|
|
"to %d, %s.",
|
|
absolute_pathname,
|
|
eno,
|
|
strerror(eno))));
|
|
succp = false;
|
|
}
|
|
return succp;
|
|
}
|
|
|
|
|
|
/**
|
|
* @node Expand path expression and if fname is provided, concatenate
|
|
* it to path to for an absolute pathname. If fname is provided
|
|
* its readability is tested.
|
|
*
|
|
* Parameters:
|
|
* @param output_path memory address where expanded path is stored,
|
|
* if output_path != NULL
|
|
*
|
|
* @param relative_path path to be expanded
|
|
*
|
|
* @param fname file name to be concatenated to the path, may be NULL
|
|
*
|
|
* @return expanded path and if fname was NULL, absolute pathname of it.
|
|
* Both return value and *output_path are NULL in case of failure.
|
|
*
|
|
*
|
|
*/
|
|
static char* get_expanded_pathname(
|
|
char** output_path,
|
|
char* relative_path,
|
|
const char* fname)
|
|
{
|
|
char* cnf_file_buf = NULL;
|
|
char* expanded_path;
|
|
|
|
if (relative_path == NULL)
|
|
{
|
|
goto return_cnf_file_buf;
|
|
}
|
|
|
|
expanded_path = (char*)malloc(PATH_MAX);
|
|
|
|
/*<
|
|
* Expand possible relative pathname to absolute path
|
|
*/
|
|
if (realpath(relative_path, expanded_path) == NULL)
|
|
{
|
|
int eno = errno;
|
|
errno = 0;
|
|
|
|
fprintf(stderr,
|
|
"*\n* Warning : Failed to read the "
|
|
"directory %s. %s.\n*\n",
|
|
relative_path,
|
|
strerror(eno));
|
|
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Warning : Failed to read the "
|
|
"directory %s, due "
|
|
"to %d, %s.",
|
|
relative_path,
|
|
eno,
|
|
strerror(eno))));
|
|
free(expanded_path);
|
|
*output_path = NULL;
|
|
goto return_cnf_file_buf;
|
|
}
|
|
|
|
if (fname != NULL)
|
|
{
|
|
/*<
|
|
* Concatenate an absolute filename and test its existence and
|
|
* readability.
|
|
*/
|
|
size_t pathlen = strnlen(expanded_path, PATH_MAX)+
|
|
1+
|
|
strnlen(fname, PATH_MAX)+
|
|
1;
|
|
cnf_file_buf = (char*)malloc(pathlen);
|
|
|
|
if (cnf_file_buf == NULL)
|
|
{
|
|
ss_dassert(cnf_file_buf != NULL);
|
|
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : Memory allocation failed due to %s.",
|
|
strerror(errno))));
|
|
|
|
free(expanded_path);
|
|
expanded_path = NULL;
|
|
goto return_cnf_file_buf;
|
|
}
|
|
snprintf(cnf_file_buf, pathlen, "%s/%s", expanded_path, fname);
|
|
|
|
if (!file_is_readable(cnf_file_buf))
|
|
{
|
|
free(expanded_path);
|
|
free(cnf_file_buf);
|
|
expanded_path = NULL;
|
|
cnf_file_buf = NULL;
|
|
goto return_cnf_file_buf;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
/*<
|
|
* If only directory was provided, check that it is
|
|
* readable.
|
|
*/
|
|
if (!file_is_readable(expanded_path))
|
|
{
|
|
free(expanded_path);
|
|
expanded_path = NULL;
|
|
goto return_cnf_file_buf;
|
|
}
|
|
}
|
|
|
|
if (output_path == NULL)
|
|
{
|
|
free(expanded_path);
|
|
}
|
|
else
|
|
{
|
|
*output_path = expanded_path;
|
|
}
|
|
|
|
return_cnf_file_buf:
|
|
|
|
return cnf_file_buf;
|
|
}
|
|
|
|
static void usage(void)
|
|
{
|
|
fprintf(stderr,
|
|
"\nUsage : %s [-h] | [-d] [-c <home directory>] [-f <config file name>]\n\n"
|
|
" -d|--nodaemon enable running in terminal process (default:disabled)\n"
|
|
" -c|--homedir=... relative|absolute MaxScale home directory\n"
|
|
" -f|--config=... relative|absolute pathname of MaxScale configuration file\n"
|
|
" (default: $MAXSCALE_HOME/etc/MaxScale.cnf)\n"
|
|
" -l|--log=... log to file or shared memory\n"
|
|
" -lfile or -lshm - defaults to shared memory\n"
|
|
" -v|--version print version info and exit\n"
|
|
" -?|--help show this help\n"
|
|
, progname);
|
|
}
|
|
|
|
/**
|
|
* The main entry point into the gateway
|
|
*
|
|
* @param argc The argument count
|
|
* @param argv The array of arguments themselves
|
|
*
|
|
* @return 0 in success, 1 otherwise
|
|
*
|
|
*
|
|
* @details Logging and error printing:
|
|
* ---
|
|
* What is printed to the terminal is something that the user can understand,
|
|
* and/or something what the user can do for. For example, fix configuration.
|
|
* More detailed messages are printed to error log, and optionally to trace
|
|
* and debug log.
|
|
*
|
|
* As soon as process switches to daemon process, stderr printing is stopped -
|
|
* except when it comes to command-line arguments processing.
|
|
* This is not obvious solution because stderr is often directed to somewhere,
|
|
* but currently this is the case.
|
|
*
|
|
* The configuration file is by default \<maxscale home\>/etc/MaxScale.cnf
|
|
* The name of configuration file and its location can be specified by
|
|
* command-line argument.
|
|
*
|
|
* \<maxscale home\> is resolved in the following order:
|
|
* 1. from '-c <dir>' command-line argument
|
|
* 2. from MAXSCALE_HOME environment variable
|
|
* 3. /etc/ if MaxScale.cnf is found from there
|
|
* 4. current working directory if MaxScale.cnf is found from there
|
|
*
|
|
* \<config filename\> is resolved in the following order:
|
|
* 1. from '-f \<config filename\>' command-line argument
|
|
* 2. by using default value "MaxScale.cnf"
|
|
*
|
|
*/
|
|
int main(int argc, char **argv)
|
|
{
|
|
int rc = MAXSCALE_SHUTDOWN;
|
|
int l;
|
|
int i;
|
|
int n;
|
|
int n_threads; /*< number of epoll listener threads */
|
|
int n_services;
|
|
int eno = 0; /*< local variable for errno */
|
|
int opt;
|
|
void** threads = NULL; /*< thread list */
|
|
char mysql_home[PATH_MAX+1];
|
|
char datadir_arg[10+PATH_MAX+1]; /*< '--datadir=' + PATH_MAX */
|
|
char language_arg[11+PATH_MAX+1]; /*< '--language=' + PATH_MAX */
|
|
char* home_dir = NULL; /*< home dir, to be freed */
|
|
char* cnf_file_path = NULL; /*< conf file, to be freed */
|
|
char* cnf_file_arg = NULL; /*< conf filename from cmd-line arg */
|
|
void* log_flush_thr = NULL;
|
|
int option_index;
|
|
int logtofile = 0; /* Use shared memory or file */
|
|
ssize_t log_flush_timeout_ms = 0;
|
|
sigset_t sigset;
|
|
sigset_t sigpipe_mask;
|
|
sigset_t saved_mask;
|
|
void (*exitfunp[4])(void) = {skygw_logmanager_exit,
|
|
datadir_cleanup,
|
|
write_footer,
|
|
NULL};
|
|
sigemptyset(&sigpipe_mask);
|
|
sigaddset(&sigpipe_mask, SIGPIPE);
|
|
|
|
progname = *argv;
|
|
|
|
#if defined(FAKE_CODE)
|
|
memset(conn_open, 0, sizeof(bool)*10240);
|
|
memset(dcb_fake_write_errno, 0, sizeof(unsigned char)*10240);
|
|
memset(dcb_fake_write_ev, 0, sizeof(__int32_t)*10240);
|
|
fail_next_backend_fd = false;
|
|
fail_next_client_fd = false;
|
|
fail_next_accept = 0;
|
|
fail_accept_errno = 0;
|
|
#endif /* FAKE_CODE */
|
|
file_write_header(stderr);
|
|
/*<
|
|
* Register functions which are called at exit except libmysqld-related,
|
|
* which must be registered later to avoid ordering issues.
|
|
*/
|
|
for (i=0; exitfunp[i] != NULL; i++)
|
|
{
|
|
l = atexit(*exitfunp);
|
|
|
|
if (l != 0)
|
|
{
|
|
char* fprerr = "Failed to register exit functions for MaxScale";
|
|
print_log_n_stderr(false, true, NULL, fprerr, 0);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
}
|
|
while ((opt = getopt_long(argc, argv, "dc:f:l:v?",
|
|
long_options, &option_index)) != -1)
|
|
{
|
|
bool succp = true;
|
|
|
|
switch (opt) {
|
|
case 'd':
|
|
/*< Debug mode, maxscale runs in this same process */
|
|
daemon_mode = false;
|
|
break;
|
|
|
|
case 'c':
|
|
/*<
|
|
* Create absolute path pointing to MaxScale home
|
|
* directory. User-provided home directory may be
|
|
* either absolute or relative. If latter, it is
|
|
* expanded and stored in home_dir if succeed.
|
|
*/
|
|
if (optarg[0] != '-')
|
|
{
|
|
struct stat sb;
|
|
|
|
if (stat(optarg, &sb) != -1
|
|
&& (! S_ISDIR(sb.st_mode)))
|
|
{
|
|
char* logerr = "Home directory argument "
|
|
"identifier \'-c\' was specified but "
|
|
"the argument didn't specify a valid "
|
|
"a directory.";
|
|
print_log_n_stderr(true, true, logerr, logerr, 0);
|
|
usage();
|
|
succp = false;
|
|
}
|
|
else
|
|
{
|
|
get_expanded_pathname(&home_dir, optarg, NULL);
|
|
}
|
|
}
|
|
|
|
if (home_dir != NULL)
|
|
{
|
|
/*<
|
|
* MAXSCALE_HOME is set.
|
|
* It is used to assist in finding the modules
|
|
* to be loaded into MaxScale.
|
|
*/
|
|
setenv("MAXSCALE_HOME", home_dir, 1);
|
|
}
|
|
else
|
|
{
|
|
char* logerr = "Home directory argument "
|
|
"identifier \'-c\' was specified but "
|
|
"the argument didn't specify \n a valid "
|
|
"home directory or the argument was "
|
|
"missing.";
|
|
print_log_n_stderr(true, true, logerr, logerr, 0);
|
|
usage();
|
|
succp = false;
|
|
}
|
|
break;
|
|
|
|
case 'f':
|
|
/*<
|
|
* Simply copy the conf file argument. Expand or validate
|
|
* it when MaxScale home directory is resolved.
|
|
*/
|
|
if (optarg[0] != '-')
|
|
{
|
|
cnf_file_arg = strndup(optarg, PATH_MAX);
|
|
}
|
|
if (cnf_file_arg == NULL)
|
|
{
|
|
char* logerr = "Configuration file argument "
|
|
"identifier \'-f\' was specified but "
|
|
"the argument didn't specify\n a valid "
|
|
"configuration file or the argument "
|
|
"was missing.";
|
|
print_log_n_stderr(true, true, logerr, logerr, 0);
|
|
usage();
|
|
succp = false;
|
|
}
|
|
break;
|
|
|
|
case 'v':
|
|
rc = EXIT_SUCCESS;
|
|
printf("%s\n",MAXSCALE_VERSION);
|
|
goto return_main;
|
|
|
|
case 'l':
|
|
if (strncasecmp(optarg, "file", PATH_MAX) == 0)
|
|
logtofile = 1;
|
|
else if (strncasecmp(optarg, "shm", PATH_MAX) == 0)
|
|
logtofile = 0;
|
|
else
|
|
{
|
|
char* logerr = "Configuration file argument "
|
|
"identifier \'-l\' was specified but "
|
|
"the argument didn't specify\n a valid "
|
|
"configuration file or the argument "
|
|
"was missing.";
|
|
print_log_n_stderr(true, true, logerr, logerr, 0);
|
|
usage();
|
|
succp = false;
|
|
}
|
|
break;
|
|
|
|
case '?':
|
|
usage();
|
|
rc = EXIT_SUCCESS;
|
|
goto return_main;
|
|
|
|
default:
|
|
usage();
|
|
succp = false;
|
|
break;
|
|
}
|
|
|
|
if (!succp)
|
|
{
|
|
rc = MAXSCALE_BADARG;
|
|
goto return_main;
|
|
}
|
|
}
|
|
|
|
if (!daemon_mode)
|
|
{
|
|
fprintf(stderr,
|
|
"Info : MaxScale will be run in the terminal process.\n");
|
|
#if defined(SS_DEBUG)
|
|
fprintf(stderr,
|
|
"\tSee "
|
|
"the log from the following log files : \n\n");
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
/*<
|
|
* Maxscale must be daemonized before opening files, initializing
|
|
* embedded MariaDB and in general, as early as possible.
|
|
*/
|
|
int r;
|
|
int eno = 0;
|
|
char* fprerr = "Failed to initialize set the signal "
|
|
"set for MaxScale. Exiting.";
|
|
#if defined(SS_DEBUG)
|
|
fprintf(stderr,
|
|
"Info : MaxScale will be run in a daemon process.\n\tSee "
|
|
"the log from the following log files : \n\n");
|
|
#endif
|
|
r = sigfillset(&sigset);
|
|
|
|
if (r != 0)
|
|
{
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, fprerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
r = sigdelset(&sigset, SIGHUP);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGHUP from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
r = sigdelset(&sigset, SIGUSR1);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGUSR1 from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
r = sigdelset(&sigset, SIGTERM);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGTERM from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
r = sigdelset(&sigset, SIGSEGV);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGSEGV from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
r = sigdelset(&sigset, SIGABRT);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGABRT from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
r = sigdelset(&sigset, SIGILL);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGILL from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
r = sigdelset(&sigset, SIGFPE);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGFPE from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
#ifdef SIGBUS
|
|
r = sigdelset(&sigset, SIGBUS);
|
|
|
|
if (r != 0)
|
|
{
|
|
char* logerr = "Failed to delete signal SIGBUS from the "
|
|
"signal set of MaxScale. Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
#endif
|
|
r = sigprocmask(SIG_SETMASK, &sigset, NULL);
|
|
|
|
if (r != 0) {
|
|
char* logerr = "Failed to set the signal set for MaxScale."
|
|
" Exiting.";
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, true, fprerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
gw_daemonize();
|
|
}
|
|
/*<
|
|
* Set signal handlers for SIGHUP, SIGTERM, SIGINT and critical signals like SIGSEGV.
|
|
*/
|
|
{
|
|
char* fprerr = "Failed to initialize signal handlers. Exiting.";
|
|
char* logerr = NULL;
|
|
l = signal_set(SIGHUP, sighup_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGHUP. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
l = signal_set(SIGUSR1, sigusr1_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGUSR1. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
l = signal_set(SIGTERM, sigterm_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGTERM. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
l = signal_set(SIGINT, sigint_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGINT. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
l = signal_set(SIGSEGV, sigfatal_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGSEGV. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
l = signal_set(SIGABRT, sigfatal_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGABRT. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
l = signal_set(SIGILL, sigfatal_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGILL. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
l = signal_set(SIGFPE, sigfatal_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGFPE. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
#ifdef SIGBUS
|
|
l = signal_set(SIGBUS, sigfatal_handler);
|
|
|
|
if (l != 0)
|
|
{
|
|
logerr = strdup("Failed to set signal handler for "
|
|
"SIGBUS. Exiting.");
|
|
goto sigset_err;
|
|
}
|
|
#endif
|
|
sigset_err:
|
|
if (l != 0)
|
|
{
|
|
eno = errno;
|
|
errno = 0;
|
|
print_log_n_stderr(true, !daemon_mode, logerr, fprerr, eno);
|
|
free(logerr);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
}
|
|
eno = pthread_sigmask(SIG_BLOCK, &sigpipe_mask, &saved_mask);
|
|
|
|
if (eno != 0)
|
|
{
|
|
char* logerr = "Failed to initialise signal mask for MaxScale. "
|
|
"Exiting.";
|
|
print_log_n_stderr(true, true, logerr, logerr, eno);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
|
|
/* register exit function for embedded MySQL library */
|
|
l = atexit(libmysqld_done);
|
|
|
|
if (l != 0) {
|
|
char* fprerr = "Failed to register exit function for\n* "
|
|
"embedded MySQL library.\n* Exiting.";
|
|
char* logerr = "Failed to register exit function libmysql_done "
|
|
"for MaxScale. Exiting.";
|
|
print_log_n_stderr(true, true, logerr, fprerr, 0);
|
|
rc = MAXSCALE_INTERNALERROR;
|
|
goto return_main;
|
|
}
|
|
|
|
/*<
|
|
* If MaxScale home directory wasn't set by command-line argument.
|
|
* Next, resolve it from environment variable and further on,
|
|
* try to use default.
|
|
*/
|
|
if (home_dir == NULL)
|
|
{
|
|
if (!resolve_maxscale_homedir(&home_dir))
|
|
{
|
|
ss_dassert(home_dir != NULL);
|
|
rc = MAXSCALE_HOMELESS;
|
|
goto return_main;
|
|
}
|
|
sprintf(mysql_home, "%s/mysql", home_dir);
|
|
setenv("MYSQL_HOME", mysql_home, 1);
|
|
}
|
|
else
|
|
{
|
|
char* log_context = strdup("Home directory command-line argument");
|
|
char* errstr;
|
|
|
|
errstr = check_dir_access(home_dir);
|
|
|
|
if (errstr != NULL)
|
|
{
|
|
char* logstr = (char*)malloc(strlen(log_context)+
|
|
1+
|
|
strlen(errstr)+
|
|
1);
|
|
|
|
snprintf(logstr,
|
|
strlen(log_context)+
|
|
1+
|
|
strlen(errstr)+1,
|
|
"%s: %s",
|
|
log_context,
|
|
errstr);
|
|
|
|
print_log_n_stderr(true, true, logstr, logstr, 0);
|
|
|
|
free(errstr);
|
|
free(logstr);
|
|
rc = MAXSCALE_HOMELESS;
|
|
goto return_main;
|
|
}
|
|
else if (!daemon_mode)
|
|
{
|
|
fprintf(stderr,
|
|
"Using %s as MAXSCALE_HOME = %s\n",
|
|
log_context,
|
|
home_dir);
|
|
}
|
|
free(log_context);
|
|
}
|
|
|
|
/**
|
|
* Init Log Manager for MaxScale.
|
|
* If $MAXSCALE_HOME is set then write the logs into $MAXSCALE_HOME/log.
|
|
* The skygw_logmanager_init expects to take arguments as passed to main
|
|
* and proesses them with getopt, therefore we need to give it a dummy
|
|
* argv[0]
|
|
*/
|
|
{
|
|
char buf[1024];
|
|
char *argv[8];
|
|
bool succp;
|
|
/** Set log directory under $MAXSCALE_HOME/log */
|
|
sprintf(buf, "%s/log", home_dir);
|
|
|
|
if(mkdir(buf, 0777) != 0)
|
|
{
|
|
if(errno != EEXIST)
|
|
{
|
|
fprintf(stderr,
|
|
"Error: Cannot create log directory: %s\n",
|
|
buf);
|
|
goto return_main;
|
|
}
|
|
}
|
|
argv[0] = "MaxScale";
|
|
argv[1] = "-j";
|
|
argv[2] = buf;
|
|
|
|
if (logtofile)
|
|
{
|
|
argv[3] = "-l"; /*< write to syslog */
|
|
/** Logs that should be syslogged */
|
|
argv[4] = "LOGFILE_MESSAGE,LOGFILE_ERROR"
|
|
"LOGFILE_DEBUG,LOGFILE_TRACE";
|
|
argv[5] = NULL;
|
|
succp = skygw_logmanager_init(5, argv);
|
|
}
|
|
else
|
|
{
|
|
argv[3] = "-s"; /*< store to shared memory */
|
|
argv[4] = "LOGFILE_DEBUG,LOGFILE_TRACE"; /*< to shm */
|
|
argv[5] = "-l"; /*< write to syslog */
|
|
argv[6] = "LOGFILE_MESSAGE,LOGFILE_ERROR"; /*< to syslog */
|
|
argv[7] = NULL;
|
|
succp = skygw_logmanager_init(7, argv);
|
|
}
|
|
|
|
if (!succp)
|
|
{
|
|
rc = MAXSCALE_BADCONFIG;
|
|
goto return_main;
|
|
}
|
|
}
|
|
/**
|
|
* Resolve the full pathname for configuration file and check for
|
|
* read accessibility.
|
|
*/
|
|
if (!resolve_maxscale_conf_fname(&cnf_file_path, home_dir, cnf_file_arg))
|
|
{
|
|
ss_dassert(cnf_file_path == NULL);
|
|
rc = MAXSCALE_BADCONFIG;
|
|
goto return_main;
|
|
}
|
|
|
|
/*<
|
|
* Set a data directory for the mysqld library, we use
|
|
* a unique directory name to avoid clauses if multiple
|
|
* instances of the gateway are beign run on the same
|
|
* machine.
|
|
*/
|
|
sprintf(datadir, "%s/data", home_dir);
|
|
|
|
if(mkdir(datadir, 0777) != 0){
|
|
|
|
if(errno != EEXIST){
|
|
fprintf(stderr,
|
|
"Error: Cannot create data directory: %s\n",datadir);
|
|
goto return_main;
|
|
}
|
|
}
|
|
|
|
sprintf(datadir, "%s/data/data%d", home_dir, getpid());
|
|
|
|
if(mkdir(datadir, 0777) != 0){
|
|
|
|
if(errno != EEXIST){
|
|
fprintf(stderr,
|
|
"Error: Cannot create data directory: %s\n",datadir);
|
|
goto return_main;
|
|
}
|
|
}
|
|
|
|
if (!daemon_mode)
|
|
{
|
|
fprintf(stderr,
|
|
"Home directory : %s"
|
|
"\nConfiguration file : %s"
|
|
"\nLog directory : %s/log"
|
|
"\nData directory : %s\n\n",
|
|
home_dir,
|
|
cnf_file_path,
|
|
home_dir,
|
|
datadir);
|
|
}
|
|
LOGIF(LM, (skygw_log_write_flush(
|
|
LOGFILE_MESSAGE,
|
|
"Home directory : %s",
|
|
home_dir)));
|
|
LOGIF(LM, (skygw_log_write_flush(
|
|
LOGFILE_MESSAGE,
|
|
"Data directory : %s",
|
|
datadir)));
|
|
LOGIF(LM, (skygw_log_write_flush(
|
|
LOGFILE_MESSAGE,
|
|
"Log directory : %s/log",
|
|
home_dir)));
|
|
LOGIF(LM, (skygw_log_write_flush(
|
|
LOGFILE_MESSAGE,
|
|
"Configuration file : %s",
|
|
cnf_file_path)));
|
|
|
|
/*< Update the server options */
|
|
for (i = 0; server_options[i]; i++)
|
|
{
|
|
if (!strcmp(server_options[i], "--datadir="))
|
|
{
|
|
snprintf(datadir_arg, 10+PATH_MAX+1, "--datadir=%s", datadir);
|
|
server_options[i] = datadir_arg;
|
|
}
|
|
else if (!strcmp(server_options[i], "--language="))
|
|
{
|
|
snprintf(language_arg,
|
|
11+PATH_MAX+1,
|
|
"--language=%s/mysql",
|
|
home_dir);
|
|
server_options[i] = language_arg;
|
|
}
|
|
}
|
|
|
|
if (mysql_library_init(num_elements, server_options, server_groups))
|
|
{
|
|
if (!daemon_mode)
|
|
{
|
|
char* fprerr = "Failed to initialise the MySQL library. "
|
|
"Exiting.";
|
|
print_log_n_stderr(false, true, fprerr, fprerr, 0);
|
|
|
|
if (mysql_errno(NULL) == 2000)
|
|
{
|
|
if (strncmp(mysql_error(NULL),
|
|
"Unknown MySQL error",
|
|
strlen("Unknown MySQL error")) != 0)
|
|
{
|
|
fprintf(stderr,
|
|
"*\n* Error : MySQL Error should "
|
|
"be \"Unknown MySQL error\" "
|
|
"instead of\n* %s\n* Hint "
|
|
":\n* Ensure that you have "
|
|
"MySQL error messages file, errmsg.sys in "
|
|
"\n* %s/mysql\n* Ensure that Embedded "
|
|
"Server Library version matches "
|
|
"exactly with that of the errmsg.sys "
|
|
"file.\n*\n",
|
|
mysql_error(NULL),
|
|
home_dir);
|
|
}
|
|
else
|
|
{
|
|
fprintf(stderr,
|
|
"*\n* Error : MySQL Error %d, %s"
|
|
"\n*\n",
|
|
mysql_errno(NULL),
|
|
mysql_error(NULL));
|
|
}
|
|
}
|
|
}
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : mysql_library_init failed. It is a "
|
|
"mandatory component, required by router services and "
|
|
"the MaxScale core. Error %d, %s, %s : %d. Exiting.",
|
|
mysql_errno(NULL),
|
|
mysql_error(NULL),
|
|
__FILE__,
|
|
__LINE__)));
|
|
rc = MAXSCALE_NOLIBRARY;
|
|
goto return_main;
|
|
}
|
|
libmysqld_started = TRUE;
|
|
|
|
if (!config_load(cnf_file_path))
|
|
{
|
|
char* fprerr = "Failed to load MaxScale configuration "
|
|
"file. Exiting.";
|
|
print_log_n_stderr(false, !daemon_mode, fprerr, fprerr, 0);
|
|
LOGIF(LE, (skygw_log_write_flush(
|
|
LOGFILE_ERROR,
|
|
"Error : Failed to load MaxScale configuration file %s. "
|
|
"Exiting.",
|
|
cnf_file_path)));
|
|
rc = MAXSCALE_BADCONFIG;
|
|
goto return_main;
|
|
}
|
|
LOGIF(LM, (skygw_log_write(
|
|
LOGFILE_MESSAGE,
|
|
"MariaDB Corporation MaxScale %s (C) MariaDB Corporation Ab 2013-2014",
|
|
MAXSCALE_VERSION)));
|
|
LOGIF(LM, (skygw_log_write(
|
|
LOGFILE_MESSAGE,
|
|
"MaxScale is running in process %i",
|
|
getpid())));
|
|
|
|
/* Write process pid into MaxScale pidfile */
|
|
write_pid_file(home_dir);
|
|
|
|
/* Init MaxScale poll system */
|
|
poll_init();
|
|
|
|
/**
|
|
* Init mysql thread context for main thread as well. Needed when users
|
|
* are queried from backends.
|
|
*/
|
|
mysql_thread_init();
|
|
|
|
/** Start the services that were created above */
|
|
n_services = serviceStartAll();
|
|
|
|
if (n_services == 0)
|
|
{
|
|
char* logerr = "Failed to start any MaxScale services. Exiting.";
|
|
print_log_n_stderr(true, !daemon_mode, logerr, logerr, 0);
|
|
rc = MAXSCALE_NOSERVICES;
|
|
goto return_main;
|
|
}
|
|
/*<
|
|
* Start periodic log flusher thread.
|
|
*/
|
|
log_flush_timeout_ms = 1000;
|
|
log_flush_thr = thread_start(
|
|
log_flush_cb,
|
|
(void *)&log_flush_timeout_ms);
|
|
|
|
/*
|
|
* Start the housekeeper thread
|
|
*/
|
|
hkinit();
|
|
|
|
/*<
|
|
* Start the polling threads, note this is one less than is
|
|
* configured as the main thread will also poll.
|
|
*/
|
|
n_threads = config_threadcount();
|
|
threads = (void **)calloc(n_threads, sizeof(void *));
|
|
/*<
|
|
* Start server threads.
|
|
*/
|
|
for (n = 0; n < n_threads - 1; n++)
|
|
{
|
|
threads[n] = thread_start(poll_waitevents, (void *)(n + 1));
|
|
}
|
|
LOGIF(LM, (skygw_log_write(LOGFILE_MESSAGE,
|
|
"MaxScale started with %d server threads.",
|
|
config_threadcount())));
|
|
/*<
|
|
* Serve clients.
|
|
*/
|
|
poll_waitevents((void *)0);
|
|
|
|
/*<
|
|
* Wait server threads' completion.
|
|
*/
|
|
for (n = 0; n < n_threads - 1; n++)
|
|
{
|
|
thread_wait(threads[n]);
|
|
}
|
|
/*<
|
|
* Wait the flush thread.
|
|
*/
|
|
thread_wait(log_flush_thr);
|
|
|
|
/*< Stop all the monitors */
|
|
monitorStopAll();
|
|
|
|
LOGIF(LM, (skygw_log_write(
|
|
LOGFILE_MESSAGE,
|
|
"MaxScale is shutting down.")));
|
|
/** Release mysql thread context*/
|
|
mysql_thread_end();
|
|
|
|
datadir_cleanup();
|
|
LOGIF(LM, (skygw_log_write(
|
|
LOGFILE_MESSAGE,
|
|
"MaxScale shutdown completed.")));
|
|
|
|
unload_all_modules();
|
|
/* Remove Pidfile */
|
|
unlink_pidfile();
|
|
|
|
return_main:
|
|
if (threads)
|
|
free(threads);
|
|
if (home_dir)
|
|
free(home_dir);
|
|
if (cnf_file_path)
|
|
free(cnf_file_path);
|
|
|
|
return rc;
|
|
} /*< End of main */
|
|
|
|
/*<
|
|
* Shutdown MaxScale server
|
|
*/
|
|
void
|
|
shutdown_server()
|
|
{
|
|
service_shutdown();
|
|
poll_shutdown();
|
|
hkshutdown();
|
|
memlog_flush_all();
|
|
log_flush_shutdown();
|
|
}
|
|
|
|
static void log_flush_shutdown(void)
|
|
{
|
|
do_exit = TRUE;
|
|
}
|
|
|
|
|
|
/**
|
|
* Periodic log flusher to ensure that log buffers are
|
|
* written to log even if block buffer used for temporarily
|
|
* storing log contents are not full.
|
|
*
|
|
* @param arg - Flush frequency in milliseconds
|
|
*
|
|
*
|
|
*/
|
|
static void log_flush_cb(
|
|
void* arg)
|
|
{
|
|
ssize_t timeout_ms = *(ssize_t *)arg;
|
|
struct timespec ts1;
|
|
|
|
ts1.tv_sec = timeout_ms/1000;
|
|
ts1.tv_nsec = (timeout_ms%1000)*1000000;
|
|
|
|
LOGIF(LM, (skygw_log_write(LOGFILE_MESSAGE,
|
|
"Started MaxScale log flusher.")));
|
|
while (!do_exit) {
|
|
skygw_log_flush(LOGFILE_ERROR);
|
|
skygw_log_flush(LOGFILE_MESSAGE);
|
|
skygw_log_flush(LOGFILE_TRACE);
|
|
skygw_log_flush(LOGFILE_DEBUG);
|
|
nanosleep(&ts1, NULL);
|
|
}
|
|
LOGIF(LM, (skygw_log_write(LOGFILE_MESSAGE,
|
|
"Finished MaxScale log flusher.")));
|
|
}
|
|
|
|
/**
|
|
* Unlink pid file, called at program exit
|
|
*/
|
|
static void unlink_pidfile(void)
|
|
{
|
|
if (strlen(pidfile)) {
|
|
if (unlink(pidfile))
|
|
{
|
|
fprintf(stderr,
|
|
"MaxScale failed to remove pidfile %s: error %d, %s\n",
|
|
pidfile,
|
|
errno,
|
|
strerror(errno));
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Write process pid into pidfile anc close it
|
|
* Parameters:
|
|
* @param home_dir The MaxScale home dir
|
|
* @return 0 on success, 1 on failure
|
|
*
|
|
*/
|
|
|
|
static int write_pid_file(char *home_dir) {
|
|
|
|
int fd = -1;
|
|
|
|
snprintf(pidfile, PATH_MAX, "%s/log/maxscale.pid", home_dir);
|
|
|
|
fd = open(pidfile, O_WRONLY | O_CREAT | O_TRUNC, 0777);
|
|
if (fd == -1) {
|
|
fprintf(stderr, "MaxScale failed to open pidFile %s: error %d, %s\n", pidfile, errno, strerror(errno));
|
|
return 1;
|
|
} else {
|
|
char pidstr[50]="";
|
|
/* truncate pidfile content */
|
|
if (ftruncate(fd, 0) == -1) {
|
|
fprintf(stderr, "MaxScale failed to truncate pidfile %s: error %d, %s\n", pidfile, errno, strerror(errno));
|
|
}
|
|
|
|
snprintf(pidstr, sizeof(pidstr)-1, "%d", getpid());
|
|
|
|
if (pwrite(fd, pidstr, strlen(pidstr), 0) != (ssize_t)strlen(pidstr)) {
|
|
fprintf(stderr, "MaxScale failed to write into pidfile %s: error %d, %s\n", pidfile, errno, strerror(errno));
|
|
/* close file and return */
|
|
close(fd);
|
|
return 1;
|
|
}
|
|
|
|
/* close file */
|
|
close(fd);
|
|
}
|
|
|
|
/* success */
|
|
return 0;
|
|
}
|