379 lines
15 KiB
C
379 lines
15 KiB
C
#pragma once
|
|
/*
|
|
* Copyright (c) 2016 MariaDB Corporation Ab
|
|
*
|
|
* Use of this software is governed by the Business Source License included
|
|
* in the LICENSE.TXT file and at www.mariadb.com/bsl11.
|
|
*
|
|
* Change Date: 2020-01-01
|
|
*
|
|
* On the date above, in accordance with the Business Source License, use
|
|
* of this software will be governed by version 2 or later of the General
|
|
* Public License.
|
|
*/
|
|
|
|
/**
|
|
* @file server.h
|
|
*
|
|
* The server level definitions within the gateway
|
|
*/
|
|
|
|
#include <maxscale/cdefs.h>
|
|
#include <maxscale/dcb.h>
|
|
#include <maxscale/resultset.h>
|
|
#include <maxscale/jansson.h>
|
|
|
|
MXS_BEGIN_DECLS
|
|
|
|
#define MAX_SERVER_ADDRESS_LEN 1024
|
|
#define MAX_SERVER_MONUSER_LEN 1024
|
|
#define MAX_SERVER_MONPW_LEN 1024
|
|
#define MAX_SERVER_VERSION_LEN 256
|
|
|
|
#define MAX_NUM_SLAVES 128 /**< Maximum number of slaves under a single server*/
|
|
|
|
/**
|
|
* Server configuration parameters names
|
|
*/
|
|
extern const char CN_MONITORPW[];
|
|
extern const char CN_MONITORUSER[];
|
|
extern const char CN_PERSISTMAXTIME[];
|
|
extern const char CN_PERSISTPOOLMAX[];
|
|
extern const char CN_PROXY_PROTOCOL[];
|
|
|
|
/**
|
|
* The server parameters used for weighting routing decissions
|
|
*/
|
|
typedef struct server_params
|
|
{
|
|
char *name; /**< Parameter name */
|
|
char *value; /**< Parameter value */
|
|
bool active; /**< Whether the parameter is valid */
|
|
struct server_params *next; /**< Next Paramter in the linked list */
|
|
} SERVER_PARAM;
|
|
|
|
/**
|
|
* The server statistics structure
|
|
*/
|
|
typedef struct
|
|
{
|
|
int n_connections; /**< Number of connections */
|
|
int n_current; /**< Current connections */
|
|
int n_current_ops; /**< Current active operations */
|
|
int n_persistent; /**< Current persistent pool */
|
|
uint64_t n_new_conn; /**< Times the current pool was empty */
|
|
uint64_t n_from_pool; /**< Times when a connection was available from the pool */
|
|
} SERVER_STATS;
|
|
|
|
/**
|
|
* The server version.
|
|
*/
|
|
typedef struct server_version
|
|
{
|
|
uint32_t major;
|
|
uint32_t minor;
|
|
uint32_t patch;
|
|
} SERVER_VERSION;
|
|
|
|
typedef enum
|
|
{
|
|
SERVER_TYPE_MARIADB,
|
|
SERVER_TYPE_MYSQL
|
|
} server_type_t;
|
|
|
|
static inline void server_decode_version(uint64_t version, SERVER_VERSION* server_version)
|
|
{
|
|
uint32_t major = version / 10000;
|
|
uint32_t minor = (version - major * 10000) / 100;
|
|
uint32_t patch = version - major * 10000 - minor * 100;
|
|
|
|
server_version->major = major;
|
|
server_version->minor = minor;
|
|
server_version->patch = patch;
|
|
}
|
|
|
|
static uint64_t server_encode_version(const SERVER_VERSION* server_version)
|
|
{
|
|
return server_version->major * 10000 + server_version->minor * 100 + server_version->patch;
|
|
}
|
|
|
|
/**
|
|
* The SERVER structure defines a backend server. Each server has a name
|
|
* or IP address for the server, a port that the server listens on and
|
|
* the name of a protocol module that is loaded to implement the protocol
|
|
* between the gateway and the server.
|
|
*/
|
|
typedef struct server
|
|
{
|
|
#if defined(SS_DEBUG)
|
|
skygw_chk_t server_chk_top;
|
|
#endif
|
|
SPINLOCK lock; /**< Common access lock */
|
|
char *unique_name; /**< Unique name for the server */
|
|
char name[MAX_SERVER_ADDRESS_LEN]; /**< Server name/IP address*/
|
|
unsigned short port; /**< Port to listen on */
|
|
char *protocol; /**< Protocol module to use */
|
|
char *authenticator; /**< Authenticator module name */
|
|
void *auth_instance; /**< Authenticator instance */
|
|
char *auth_options; /**< Authenticator options */
|
|
SSL_LISTENER *server_ssl; /**< SSL data structure for server, if any */
|
|
uint64_t status; /**< Status flag bitmap for the server */
|
|
uint64_t status_pending; /**< Pending status flag bitmap for the server */
|
|
char monuser[MAX_SERVER_MONUSER_LEN]; /**< User name to use to monitor the db */
|
|
char monpw[MAX_SERVER_MONPW_LEN]; /**< Password to use to monitor the db */
|
|
SERVER_STATS stats; /**< The server statistics */
|
|
struct server *next; /**< Next server */
|
|
struct server *nextdb; /**< Next server in list attached to a service */
|
|
char version_string[MAX_SERVER_VERSION_LEN]; /**< Server version string, i.e. MySQL server version */
|
|
uint64_t version; /**< Server version */
|
|
server_type_t server_type; /**< Server type */
|
|
long node_id; /**< Node id, server_id for M/S or local_index for Galera */
|
|
int rlag; /**< Replication Lag for Master / Slave replication */
|
|
unsigned long node_ts; /**< Last timestamp set from M/S monitor module */
|
|
SERVER_PARAM *parameters; /**< Parameters of a server that may be used to weight routing decisions */
|
|
long master_id; /**< Master server id of this node */
|
|
int depth; /**< Replication level in the tree */
|
|
long slaves[MAX_NUM_SLAVES]; /**< Slaves of this node */
|
|
bool master_err_is_logged; /*< If node failed, this indicates whether it is logged */
|
|
DCB **persistent; /**< List of unused persistent connections to the server */
|
|
long persistpoolmax; /**< Maximum size of persistent connections pool */
|
|
long persistmaxtime; /**< Maximum number of seconds connection can live */
|
|
int persistmax; /**< Maximum pool size actually achieved since startup */
|
|
uint8_t charset; /**< Default server character set */
|
|
bool is_active; /**< Server is active and has not been "destroyed" */
|
|
bool proxy_protocol; /**< Send proxy-protocol header to backend when connecting client sessions. */
|
|
int last_event; /**< The last event that occurred on this server */
|
|
bool active_event; /**< Event observed when MaxScale was active */
|
|
int64_t triggered_at; /**< Time when the last event was triggered */
|
|
struct
|
|
{
|
|
bool ssl_not_enabled; /**< SSL not used for an SSL enabled server */
|
|
} log_warning; /**< Whether a specific warning was logged */
|
|
#if defined(SS_DEBUG)
|
|
skygw_chk_t server_chk_tail;
|
|
#endif
|
|
} SERVER;
|
|
|
|
enum
|
|
{
|
|
MAX_RLAG_NOT_AVAILABLE = -1,
|
|
MAX_RLAG_UNDEFINED = -2
|
|
};
|
|
|
|
/**
|
|
* Status bits in the server->status member.
|
|
*
|
|
* These are a bitmap of attributes that may be applied to a server
|
|
*/
|
|
#define SERVER_RUNNING 0x0001 /**<< The server is up and running */
|
|
#define SERVER_MASTER 0x0002 /**<< The server is a master, i.e. can handle writes */
|
|
#define SERVER_SLAVE 0x0004 /**<< The server is a slave, i.e. can handle reads */
|
|
#define SERVER_JOINED 0x0008 /**<< The server is joined in a Galera cluster */
|
|
#define SERVER_NDB 0x0010 /**<< The server is part of a MySQL cluster setup */
|
|
#define SERVER_MAINT 0x0020 /**<< Server is in maintenance mode */
|
|
#define SERVER_SLAVE_OF_EXTERNAL_MASTER 0x0040 /**<< Server is slave of a Master outside
|
|
the provided replication topology */
|
|
#define SERVER_STALE_STATUS 0x0080 /**<< Server stale status, monitor didn't update it */
|
|
#define SERVER_MASTER_STICKINESS 0x0100 /**<< Server Master stickiness */
|
|
#define SERVER_AUTH_ERROR 0x1000 /**<< Authentication error from monitor */
|
|
#define SERVER_STALE_SLAVE 0x2000 /**<< Slave status is possible even without a master */
|
|
#define SERVER_RELAY_MASTER 0x4000 /**<< Server is a relay master */
|
|
|
|
/**
|
|
* Is the server valid and active
|
|
*/
|
|
#define SERVER_IS_ACTIVE(server) (server->is_active)
|
|
|
|
/**
|
|
* Is the server running - the macro returns true if the server is marked as running
|
|
* regardless of it's state as a master or slave
|
|
*/
|
|
#define SERVER_IS_RUNNING(server) (((server)->status & (SERVER_RUNNING|SERVER_MAINT)) == SERVER_RUNNING)
|
|
/**
|
|
* Is the server marked as down - the macro returns true if the server is believed
|
|
* to be inoperable.
|
|
*/
|
|
#define SERVER_IS_DOWN(server) (((server)->status & SERVER_RUNNING) == 0)
|
|
/**
|
|
* Is the server a master? The server must be both running and marked as master
|
|
* in order for the macro to return true
|
|
*/
|
|
#define SERVER_IS_MASTER(server) SRV_MASTER_STATUS((server)->status)
|
|
|
|
#define SRV_MASTER_STATUS(status) ((status & \
|
|
(SERVER_RUNNING|SERVER_MASTER|SERVER_MAINT)) == \
|
|
(SERVER_RUNNING|SERVER_MASTER))
|
|
|
|
/**
|
|
* Is the server valid candidate for root master. The server must be running,
|
|
* marked as master and not have maintenance bit set.
|
|
*/
|
|
#define SERVER_IS_ROOT_MASTER(server) \
|
|
(((server)->status & (SERVER_RUNNING|SERVER_MASTER|SERVER_MAINT)) == (SERVER_RUNNING|SERVER_MASTER))
|
|
|
|
/**
|
|
* Is the server a slave? The server must be both running and marked as a slave
|
|
* in order for the macro to return true
|
|
*/
|
|
#define SERVER_IS_SLAVE(server) \
|
|
(((server)->status & (SERVER_RUNNING|SERVER_SLAVE|SERVER_MAINT)) == \
|
|
(SERVER_RUNNING|SERVER_SLAVE))
|
|
|
|
/**
|
|
* Is the server joined Galera node? The server must be running and joined.
|
|
*/
|
|
#define SERVER_IS_JOINED(server) \
|
|
(((server)->status & (SERVER_RUNNING|SERVER_JOINED|SERVER_MAINT)) == (SERVER_RUNNING|SERVER_JOINED))
|
|
|
|
/**
|
|
* Is the server a SQL node in MySQL Cluster? The server must be running and with NDB status
|
|
*/
|
|
#define SERVER_IS_NDB(server) \
|
|
(((server)->status & (SERVER_RUNNING|SERVER_NDB|SERVER_MAINT)) == (SERVER_RUNNING|SERVER_NDB))
|
|
|
|
/**
|
|
* Is the server in maintenance mode.
|
|
*/
|
|
#define SERVER_IN_MAINT(server) ((server)->status & SERVER_MAINT)
|
|
|
|
/** server is not master, slave or joined */
|
|
#define SERVER_NOT_IN_CLUSTER(s) (((s)->status & (SERVER_MASTER|SERVER_SLAVE|SERVER_JOINED|SERVER_NDB)) == 0)
|
|
|
|
#define SERVER_IS_IN_CLUSTER(s) (((s)->status & (SERVER_MASTER|SERVER_SLAVE|SERVER_JOINED|SERVER_NDB)) != 0)
|
|
|
|
#define SERVER_IS_RELAY_SERVER(server) \
|
|
(((server)->status & (SERVER_RUNNING|SERVER_MASTER|SERVER_SLAVE|SERVER_MAINT)) == \
|
|
(SERVER_RUNNING|SERVER_MASTER|SERVER_SLAVE))
|
|
|
|
#define SERVER_IS_SLAVE_OF_EXTERNAL_MASTER(s) (((s)->status & \
|
|
(SERVER_RUNNING|SERVER_SLAVE_OF_EXTERNAL_MASTER)) == \
|
|
(SERVER_RUNNING|SERVER_SLAVE_OF_EXTERNAL_MASTER))
|
|
|
|
/**
|
|
* @brief Allocate a new server
|
|
*
|
|
* This will create a new server that represents a backend server that services
|
|
* can use. This function will add the server to the running configuration but
|
|
* will not persist the changes.
|
|
*
|
|
* @param name Unique server name
|
|
* @param address The server address
|
|
* @param port The port to connect to
|
|
* @param protocol The protocol to use to connect to the server
|
|
* @param authenticator The server authenticator module
|
|
* @param auth_options Options for the authenticator module
|
|
* @return The newly created server or NULL if an error occurred
|
|
*/
|
|
extern SERVER* server_alloc(const char *name, const char *address, unsigned short port,
|
|
const char *protocol, const char *authenticator,
|
|
const char *auth_options);
|
|
|
|
/**
|
|
* @brief Find a server that can be reused
|
|
*
|
|
* A server that has been destroyed will not be deleted but only deactivated.
|
|
*
|
|
* @param name Name of the server
|
|
* @param protocol Protocol used by the server
|
|
* @param authenticator The authenticator module of the server
|
|
* @param auth_options Options for the authenticator
|
|
* @param address The network address of the new server
|
|
* @param port The port of the new server
|
|
*
|
|
* @return Repurposed SERVER or NULL if no servers matching the criteria were
|
|
* found
|
|
* @see runtime_create_server
|
|
*/
|
|
SERVER* server_repurpose_destroyed(const char *name, const char *protocol,
|
|
const char *authenticator, const char *auth_options,
|
|
const char *address, const char *port);
|
|
/**
|
|
* @brief Serialize a server to a file
|
|
*
|
|
* This converts @c server into an INI format file. This allows created servers
|
|
* to be persisted to disk. This will replace any existing files with the same
|
|
* name.
|
|
*
|
|
* @param server Server to serialize
|
|
* @return False if the serialization of the server fails, true if it was successful
|
|
*/
|
|
bool server_serialize(const SERVER *server);
|
|
|
|
/**
|
|
* @brief Add a server parameter
|
|
*
|
|
* @param server Server where the parameter is added
|
|
* @param name Parameter name
|
|
* @param value Parameter value
|
|
*/
|
|
void server_add_parameter(SERVER *server, const char *name, const char *value);
|
|
|
|
/**
|
|
* @brief Remove a server parameter
|
|
*
|
|
* @param server Server to remove the parameter from
|
|
* @param name The name of the parameter to remove
|
|
* @return True if a parameter was removed
|
|
*/
|
|
bool server_remove_parameter(SERVER *server, const char *name);
|
|
|
|
/**
|
|
* @brief Check if a server points to a local MaxScale service
|
|
*
|
|
* @param server Server to check
|
|
* @return True if the server points to a local MaxScale service
|
|
*/
|
|
bool server_is_mxs_service(const SERVER *server);
|
|
|
|
/**
|
|
* @brief Convert a server to JSON format
|
|
*
|
|
* @param server Server to convert
|
|
* @param host Hostname of this server
|
|
*
|
|
* @return JSON representation of server or NULL if an error occurred
|
|
*/
|
|
json_t* server_to_json(const SERVER* server, const char* host);
|
|
|
|
/**
|
|
* @brief Convert all servers into JSON format
|
|
*
|
|
* @param host Hostname of this server
|
|
*
|
|
* @return JSON array of servers or NULL if an error occurred
|
|
*/
|
|
json_t* server_list_to_json(const char* host);
|
|
|
|
extern int server_free(SERVER *server);
|
|
extern SERVER *server_find_by_unique_name(const char *name);
|
|
extern int server_find_by_unique_names(char **server_names, int size, SERVER*** output);
|
|
extern SERVER *server_find(const char *servname, unsigned short port);
|
|
extern char *server_status(const SERVER *);
|
|
extern void server_clear_set_status(SERVER *server, uint64_t specified_bits, uint64_t bits_to_set);
|
|
extern void server_set_status_nolock(SERVER *server, uint64_t bit);
|
|
extern void server_clear_status_nolock(SERVER *server, uint64_t bit);
|
|
extern void server_transfer_status(SERVER *dest_server, const SERVER *source_server);
|
|
extern void server_add_mon_user(SERVER *server, const char *user, const char *passwd);
|
|
extern const char *server_get_parameter(const SERVER *server, const char *name);
|
|
extern void server_update_credentials(SERVER *server, const char *user, const char *passwd);
|
|
extern DCB* server_get_persistent(SERVER *server, const char *user, const char* ip, const char *protocol, int id);
|
|
extern void server_update_address(SERVER *server, const char *address);
|
|
extern void server_update_port(SERVER *server, unsigned short port);
|
|
extern uint64_t server_map_status(const char *str);
|
|
extern void server_set_version_string(SERVER* server, const char* version_string);
|
|
extern void server_set_version(SERVER* server, const char* version_string, uint64_t version);
|
|
extern uint64_t server_get_version(const SERVER* server);
|
|
extern void server_set_status(SERVER *server, int bit);
|
|
extern void server_clear_status(SERVER *server, int bit);
|
|
|
|
extern void printServer(const SERVER *);
|
|
extern void printAllServers();
|
|
extern void dprintAllServers(DCB *);
|
|
extern void dprintAllServersJson(DCB *);
|
|
extern void dprintServer(DCB *, const SERVER *);
|
|
extern void dprintPersistentDCBs(DCB *, const SERVER *);
|
|
extern void dListServers(DCB *);
|
|
extern RESULTSET *serverGetList();
|
|
|
|
MXS_END_DECLS
|