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MaxScale/server/core/config_runtime.cc

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/*
* 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: 2022-01-01
*
* 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.
*/
#include <maxscale/ccdefs.hh>
#include "internal/config_runtime.h"
#include <algorithm>
#include <cinttypes>
#include <functional>
#include <iterator>
#include <set>
#include <sstream>
#include <string>
#include <strings.h>
#include <tuple>
#include <vector>
#include <maxbase/atomic.h>
#include <maxscale/clock.h>
#include <maxscale/jansson.hh>
#include <maxscale/json_api.h>
#include <maxscale/paths.h>
#include <maxscale/router.h>
#include <maxscale/users.h>
#include "internal/config.hh"
#include "internal/filter.hh"
#include "internal/modules.h"
#include "internal/monitor.h"
#include "internal/query_classifier.hh"
typedef std::set<std::string> StringSet;
typedef std::vector<std::string> StringVector;
using std::tie;
static std::mutex crt_lock;
#define RUNTIME_ERRMSG_BUFSIZE 512
thread_local char runtime_errmsg[RUNTIME_ERRMSG_BUFSIZE];
typedef std::function<bool (const std::string&, const std::string&)> JsonValidator;
typedef std::pair<const char*, JsonValidator> Relationship;
void config_runtime_error(const char* fmt, ...)
{
va_list list;
va_start(list, fmt);
vsnprintf(runtime_errmsg, sizeof(runtime_errmsg), fmt, list);
va_end(list);
}
static std::string runtime_get_error()
{
std::string rval(runtime_errmsg);
runtime_errmsg[0] = '\0';
return rval;
}
static const MXS_MODULE_PARAM* get_type_parameters(const char* type)
{
if (strcmp(type, CN_SERVICE) == 0)
{
return config_service_params;
}
else if (strcmp(type, CN_LISTENER) == 0)
{
return config_listener_params;
}
else if (strcmp(type, CN_MONITOR) == 0)
{
return config_monitor_params;
}
else if (strcmp(type, CN_FILTER) == 0)
{
return config_filter_params;
}
else if (strcmp(type, CN_SERVER) == 0)
{
return config_server_params;
}
MXS_NOTICE("Module type with no default parameters used: %s", type);
mxb_assert_message(!true, "Module type with no default parameters used");
return NULL;
}
/**
* @brief Load module default parameters
*
* @param name Name of the module to load
* @param module_type Type of the module (MODULE_ROUTER, MODULE_PROTOCOL etc.)
* @param object_type Type of the object (server, service, listener etc.)
*
* @return Whether loading succeeded and the list of default parameters
*/
static std::pair<bool, MXS_CONFIG_PARAMETER*> load_defaults(const char* name,
const char* module_type,
const char* object_type)
{
bool rval;
MXS_CONFIG_PARAMETER* params = NULL;
CONFIG_CONTEXT ctx = {(char*)""};
if (const MXS_MODULE* mod = get_module(name, module_type))
{
config_add_defaults(&ctx, get_type_parameters(object_type));
config_add_defaults(&ctx, mod->parameters);
params = ctx.parameters;
rval = true;
}
else
{
config_runtime_error("Failed to load module '%s': %s",
name,
errno ? mxs_strerror(errno) : "See MaxScale logs for details");
}
return {rval, params};
}
bool runtime_link_server(SERVER* server, const char* target)
{
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = false;
Service* service = service_internal_find(target);
MXS_MONITOR* monitor = service ? NULL : monitor_find(target);
if (service)
{
if (serviceAddBackend(service, server))
{
service_serialize(service);
rval = true;
}
else
{
config_runtime_error("Service '%s' already uses server '%s'",
service->name,
server->name);
}
}
else if (monitor)
{
if (monitor_add_server(monitor, server))
{
monitor_serialize(monitor);
rval = true;
}
else
{
config_runtime_error("Server '%s' is already monitored", server->name);
}
}
if (rval)
{
const char* type = service ? "service" : "monitor";
MXS_NOTICE("Added server '%s' to %s '%s'", server->name, type, target);
}
return rval;
}
bool runtime_unlink_server(SERVER* server, const char* target)
{
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = false;
Service* service = service_internal_find(target);
MXS_MONITOR* monitor = service ? NULL : monitor_find(target);
if (service || monitor)
{
rval = true;
if (service)
{
serviceRemoveBackend(service, server);
service_serialize(service);
}
else if (monitor)
{
monitor_remove_server(monitor, server);
monitor_serialize(monitor);
}
const char* type = service ? "service" : "monitor";
MXS_NOTICE("Removed server '%s' from %s '%s'", server->name, type, target);
}
return rval;
}
bool runtime_create_server(const char* name,
const char* address,
const char* port,
const char* protocol,
const char* authenticator)
{
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = false;
if (server_find_by_unique_name(name) == NULL)
{
if (protocol == NULL)
{
protocol = "mariadbbackend";
}
CONFIG_CONTEXT ctx {(char*)""};
bool ok;
tie(ok, ctx.parameters) = load_defaults(protocol, MODULE_PROTOCOL, CN_SERVER);
if (ok)
{
config_replace_param(&ctx, CN_PROTOCOL, protocol);
if (address)
{
config_replace_param(&ctx, "address", address);
}
if (port)
{
config_replace_param(&ctx, "port", port);
}
if (authenticator)
{
config_replace_param(&ctx, "authenticator", authenticator);
}
SERVER* server = server_alloc(name, ctx.parameters);
if (server && server_serialize(server))
{
rval = true;
MXS_NOTICE("Created server '%s' at %s:%u",
server->name,
server->address,
server->port);
}
else
{
config_runtime_error("Failed to create server '%s', see error log for more details", name);
}
config_parameter_free(ctx.parameters);
}
else
{
config_runtime_error("Server creation failed when loading protocol module '%s'", protocol);
}
}
else
{
config_runtime_error("Server '%s' already exists", name);
}
return rval;
}
bool runtime_destroy_server(SERVER* server)
{
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = false;
if (service_server_in_use(server) || monitor_server_in_use(server))
{
const char* err = "Cannot destroy server '%s' as it is used by at least "
"one service or monitor";
config_runtime_error(err, server->name);
MXS_ERROR(err, server->name);
}
else
{
char filename[PATH_MAX];
snprintf(filename,
sizeof(filename),
"%s/%s.cnf",
get_config_persistdir(),
server->name);
if (unlink(filename) == -1)
{
if (errno != ENOENT)
{
MXS_ERROR("Failed to remove persisted server configuration '%s': %d, %s",
filename,
errno,
mxs_strerror(errno));
}
else
{
rval = true;
MXS_WARNING("Server '%s' was not created at runtime. Remove the "
"server manually from the correct configuration file.",
server->name);
}
}
else
{
rval = true;
}
if (rval)
{
MXS_NOTICE("Destroyed server '%s' at %s:%u",
server->name,
server->address,
server->port);
server->is_active = false;
}
}
return rval;
}
static SSL_LISTENER* create_ssl(const char* name,
const char* key,
const char* cert,
const char* ca,
const char* version,
const char* depth,
const char* verify)
{
SSL_LISTENER* rval = NULL;
CONFIG_CONTEXT* obj = config_context_create(name);
if (obj)
{
if (config_add_param(obj, CN_SSL, CN_REQUIRED)
&& (!key || config_add_param(obj, CN_SSL_KEY, key))
&& (!cert || config_add_param(obj, CN_SSL_CERT, cert))
&& config_add_param(obj, CN_SSL_CA_CERT, ca)
&& (!version || config_add_param(obj, CN_SSL_VERSION, version))
&& (!depth || config_add_param(obj, CN_SSL_CERT_VERIFY_DEPTH, depth))
&& (!verify || config_add_param(obj, CN_SSL_VERIFY_PEER_CERTIFICATE, verify)))
{
config_create_ssl(name, obj->parameters, true, &rval);
}
config_context_free(obj);
}
return rval;
}
bool runtime_enable_server_ssl(SERVER* server,
const char* key,
const char* cert,
const char* ca,
const char* version,
const char* depth,
const char* verify)
{
bool rval = false;
if (key && cert && ca)
{
std::lock_guard<std::mutex> guard(crt_lock);
SSL_LISTENER* ssl = create_ssl(server->name, key, cert, ca, version, depth, verify);
if (ssl)
{
/** TODO: Properly discard old SSL configurations.This could cause the
* loss of a pointer if two update operations are done at the same time.*/
ssl->next = server->server_ssl;
/** Sync to prevent reads on partially initialized server_ssl */
atomic_synchronize();
server->server_ssl = ssl;
if (server_serialize(server))
{
MXS_NOTICE("Enabled SSL for server '%s'", server->name);
rval = true;
}
}
}
return rval;
}
/**
* @brief Convert a string value to a positive integer
*
* If the value is not a positive integer, an error is printed to @c dcb.
*
* @param value String value
* @return 0 on error, otherwise a positive integer
*/
static long get_positive_int(const char* value)
{
char* endptr;
long ival = strtol(value, &endptr, 10);
if (*endptr == '\0' && ival > 0)
{
return ival;
}
return 0;
}
static inline bool is_valid_integer(const char* value)
{
char* endptr;
return strtol(value, &endptr, 10) >= 0 && *value && *endptr == '\0';
}
bool param_is_known(const MXS_MODULE_PARAM* basic,
const MXS_MODULE_PARAM* module,
const char* key)
{
std::unordered_set<std::string> names;
for (auto param : {basic, module})
{
for (int i = 0; param[i].name; i++)
{
names.insert(param[i].name);
}
}
return names.count(key);
}
bool param_is_valid(const MXS_MODULE_PARAM* basic,
const MXS_MODULE_PARAM* module,
const char* key,
const char* value)
{
return config_param_is_valid(basic, key, value, NULL)
|| config_param_is_valid(module, key, value, NULL);
}
bool runtime_alter_server(SERVER* server, const char* key, const char* value)
{
if (!value[0])
{
config_runtime_error("Empty value for parameter: %s", key);
return false;
}
const MXS_MODULE* mod = get_module(server->protocol, MODULE_PROTOCOL);
// As servers allow unknown parameters, we must only validate known parameters
if (param_is_known(config_server_params, mod->parameters, key)
&& !param_is_valid(config_server_params, mod->parameters, key, value))
{
config_runtime_error("Invalid value for parameter '%s': %s", key, value);
return false;
}
if (strcmp(key, CN_DISK_SPACE_THRESHOLD) == 0)
{
// This cannot be safely modified during runtime since the monitor thread could be reading the
// value. TODO: To enable this, the threshold value needs to be moved to the private Server-class
// so that locking can be enforced on any access.
config_runtime_error("The server parameter '%s' cannot be modified during runtime.",
CN_DISK_SPACE_THRESHOLD);
return false;
}
std::lock_guard<std::mutex> guard(crt_lock);
server_set_parameter(server, key, value);
if (strcmp(key, CN_ADDRESS) == 0)
{
server_update_address(server, value);
}
else if (strcmp(key, CN_PORT) == 0)
{
if (long ival = get_positive_int(value))
{
server_update_port(server, ival);
}
}
else if (strcmp(key, CN_EXTRA_PORT) == 0)
{
server_update_extra_port(server, atoi(value));
}
else if (strcmp(key, CN_MONITORUSER) == 0)
{
server_update_credentials(server, value, server->monpw);
}
else if (strcmp(key, CN_MONITORPW) == 0)
{
server_update_credentials(server, server->monuser, value);
}
else if (strcmp(key, CN_PERSISTPOOLMAX) == 0)
{
if (is_valid_integer(value))
{
server->persistpoolmax = atoi(value);
}
}
else if (strcmp(key, CN_PERSISTMAXTIME) == 0)
{
if (is_valid_integer(value))
{
server->persistmaxtime = atoi(value);
}
}
else
{
/**
* It's likely that this parameter is used as a weighting parameter.
* We need to update the weights of services that use this.
*/
service_update_weights();
}
server_serialize(server);
MXS_NOTICE("Updated server '%s': %s=%s", server->name, key, value);
return true;
}
bool validate_param(const MXS_MODULE_PARAM* basic,
const MXS_MODULE_PARAM* module,
const char* key,
const char* value)
{
bool rval = false;
if (!param_is_known(basic, module, key))
{
config_runtime_error("Unknown parameter: %s", key);
}
else if (!value[0])
{
config_runtime_error("Empty value for parameter: %s", key);
}
else if (!param_is_valid(basic, module, key, value))
{
config_runtime_error("Invalid parameter value for '%s': %s", key, value);
}
else
{
rval = true;
}
return rval;
}
bool do_alter_monitor(MXS_MONITOR* monitor, const char* key, const char* value)
{
mxb_assert(monitor->state == MONITOR_STATE_STOPPED);
const MXS_MODULE* mod = get_module(monitor->module_name, MODULE_MONITOR);
if (!validate_param(config_monitor_params, mod->parameters, key, value))
{
return false;
}
else if (strcmp(key, "servers") == 0)
{
config_runtime_error("Parameter '%s' cannot be altered via this method", key);
return false;
}
std::lock_guard<std::mutex> guard(crt_lock);
monitor_set_parameter(monitor, key, value);
bool success = true;
if (strcmp(key, CN_USER) == 0)
{
monitor_add_user(monitor, value, monitor->password);
}
else if (strcmp(key, CN_PASSWORD) == 0)
{
monitor_add_user(monitor, monitor->user, value);
}
else if (strcmp(key, CN_MONITOR_INTERVAL) == 0)
{
if (auto ival = get_positive_int(value))
{
monitor_set_interval(monitor, ival);
}
}
else if (strcmp(key, CN_BACKEND_CONNECT_TIMEOUT) == 0)
{
if (auto ival = get_positive_int(value))
{
monitor_set_network_timeout(monitor,
MONITOR_CONNECT_TIMEOUT,
ival,
CN_BACKEND_CONNECT_TIMEOUT);
}
}
else if (strcmp(key, CN_BACKEND_WRITE_TIMEOUT) == 0)
{
if (auto ival = get_positive_int(value))
{
monitor_set_network_timeout(monitor,
MONITOR_WRITE_TIMEOUT,
ival,
CN_BACKEND_WRITE_TIMEOUT);
}
}
else if (strcmp(key, CN_BACKEND_READ_TIMEOUT) == 0)
{
if (auto ival = get_positive_int(value))
{
monitor_set_network_timeout(monitor,
MONITOR_READ_TIMEOUT,
ival,
CN_BACKEND_READ_TIMEOUT);
}
}
else if (strcmp(key, CN_BACKEND_CONNECT_ATTEMPTS) == 0)
{
if (auto ival = get_positive_int(value))
{
monitor_set_network_timeout(monitor,
MONITOR_CONNECT_ATTEMPTS,
ival,
CN_BACKEND_CONNECT_ATTEMPTS);
}
}
else if (strcmp(key, CN_JOURNAL_MAX_AGE) == 0)
{
if (auto ival = get_positive_int(value))
{
monitor_set_journal_max_age(monitor, ival);
}
}
else if (strcmp(key, CN_SCRIPT_TIMEOUT) == 0)
{
if (auto ival = get_positive_int(value))
{
monitor_set_script_timeout(monitor, ival);
}
}
else if (strcmp(key, CN_DISK_SPACE_THRESHOLD) == 0)
{
success = monitor_set_disk_space_threshold(monitor, value);
}
else
{
// This should be a module specific parameter
mxb_assert(config_param_is_valid(mod->parameters, key, value, NULL));
}
if (success)
{
MXS_NOTICE("Updated monitor '%s': %s=%s", monitor->name, key, value);
}
return success;
}
bool runtime_alter_monitor(MXS_MONITOR* monitor, const char* key, const char* value)
{
// If the monitor is already stopped, don't stop/start it.
bool was_running = (monitor->state == MONITOR_STATE_RUNNING);
if (was_running)
{
monitor_stop(monitor);
}
bool success = do_alter_monitor(monitor, key, value);
if (success)
{
monitor_serialize(monitor);
}
if (was_running)
{
monitor_start(monitor, monitor->parameters);
}
return success;
}
bool runtime_alter_service(Service* service, const char* zKey, const char* zValue)
{
const MXS_MODULE* mod = get_module(service->routerModule, MODULE_ROUTER);
std::string key(zKey);
std::string value(zValue);
if (!validate_param(config_service_params, mod->parameters, zKey, zValue))
{
return false;
}
else if (key == "filters" || key == "servers")
{
config_runtime_error("Parameter '%s' cannot be altered via this method", zKey);
return false;
}
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = true;
if (service->is_basic_parameter(key))
{
service_replace_parameter(service, zKey, zValue);
service->update_basic_parameter(key, value);
}
else
{
if (service->router->configureInstance && service->capabilities & RCAP_TYPE_RUNTIME_CONFIG)
{
// Stash the old value in case the reconfiguration fails.
std::string old_value = config_get_string(service->svc_config_param, key.c_str());
service_replace_parameter(service, key.c_str(), value.c_str());
if (!service->router->configureInstance(service->router_instance, service->svc_config_param))
{
// Reconfiguration failed, restore the old value of the parameter
if (old_value.empty())
{
service_remove_parameter(service, key.c_str());
}
else
{
service_replace_parameter(service, key.c_str(), old_value.c_str());
}
rval = false;
config_runtime_error("Reconfiguration of service '%s' failed. See log "
"file for more details.",
service->name);
}
}
else
{
rval = false;
config_runtime_error("Router '%s' does not support reconfiguration.",
service->routerModule);
}
}
if (rval)
{
service_serialize(service);
MXS_NOTICE("Updated service '%s': %s=%s", service->name, key.c_str(), value.c_str());
}
return rval;
}
bool runtime_alter_maxscale(const char* name, const char* value)
{
MXS_CONFIG& cnf = *config_get_global_options();
std::string key = name;
bool rval = false;
std::lock_guard<std::mutex> guard(crt_lock);
if (key == CN_AUTH_CONNECT_TIMEOUT)
{
int intval = get_positive_int(value);
if (intval)
{
MXS_NOTICE("Updated '%s' from %d to %d",
CN_AUTH_CONNECT_TIMEOUT,
cnf.auth_conn_timeout,
intval);
cnf.auth_conn_timeout = intval;
rval = true;
}
else
{
config_runtime_error("Invalid timeout value for '%s': %s", CN_AUTH_CONNECT_TIMEOUT, value);
}
}
else if (key == CN_AUTH_READ_TIMEOUT)
{
int intval = get_positive_int(value);
if (intval)
{
MXS_NOTICE("Updated '%s' from %d to %d",
CN_AUTH_READ_TIMEOUT,
cnf.auth_read_timeout,
intval);
cnf.auth_read_timeout = intval;
rval = true;
}
else
{
config_runtime_error("Invalid timeout value for '%s': %s", CN_AUTH_READ_TIMEOUT, value);
}
}
else if (key == CN_AUTH_WRITE_TIMEOUT)
{
int intval = get_positive_int(value);
if (intval)
{
MXS_NOTICE("Updated '%s' from %d to %d",
CN_AUTH_WRITE_TIMEOUT,
cnf.auth_write_timeout,
intval);
cnf.auth_write_timeout = intval;
rval = true;
}
else
{
config_runtime_error("Invalid timeout value for '%s': %s", CN_AUTH_WRITE_TIMEOUT, value);
}
}
else if (key == CN_ADMIN_AUTH)
{
int boolval = config_truth_value(value);
if (boolval != -1)
{
MXS_NOTICE("Updated '%s' from '%s' to '%s'",
CN_ADMIN_AUTH,
cnf.admin_auth ? "true" : "false",
boolval ? "true" : "false");
cnf.admin_auth = boolval;
rval = true;
}
else
{
config_runtime_error("Invalid boolean value for '%s': %s", CN_ADMIN_AUTH, value);
}
}
else if (key == CN_ADMIN_LOG_AUTH_FAILURES)
{
int boolval = config_truth_value(value);
if (boolval != -1)
{
MXS_NOTICE("Updated '%s' from '%s' to '%s'",
CN_ADMIN_LOG_AUTH_FAILURES,
cnf.admin_log_auth_failures ? "true" : "false",
boolval ? "true" : "false");
cnf.admin_log_auth_failures = boolval;
rval = true;
}
else
{
config_runtime_error("Invalid boolean value for '%s': %s", CN_ADMIN_LOG_AUTH_FAILURES, value);
}
}
else if (key == CN_PASSIVE)
{
int boolval = config_truth_value(value);
if (boolval != -1)
{
MXS_NOTICE("Updated '%s' from '%s' to '%s'",
CN_PASSIVE,
cnf.passive ? "true" : "false",
boolval ? "true" : "false");
if (cnf.passive && !boolval)
{
// This MaxScale is being promoted to the active instance
cnf.promoted_at = mxs_clock();
}
cnf.passive = boolval;
rval = true;
}
else
{
config_runtime_error("Invalid boolean value for '%s': %s", CN_PASSIVE, value);
}
}
else if (key == CN_QUERY_CLASSIFIER_CACHE_SIZE)
{
uint64_t max_size;
if (get_suffixed_size(value, &max_size))
{
decltype(QC_CACHE_PROPERTIES::max_size)new_size = max_size;
if (new_size >= 0)
{
MXS_NOTICE("Updated '%s' from %" PRIi64 " to %lu",
CN_QUERY_CLASSIFIER_CACHE_SIZE,
cnf.qc_cache_properties.max_size,
max_size);
cnf.qc_cache_properties.max_size = new_size;
qc_set_cache_properties(&cnf.qc_cache_properties);
rval = true;
}
else
{
config_runtime_error("Value too large for '%s': %s", CN_QUERY_CLASSIFIER_CACHE_SIZE, value);
}
}
else
{
config_runtime_error("Invalid size value for '%s': %s", CN_QUERY_CLASSIFIER_CACHE_SIZE, value);
}
}
else if (key == CN_WRITEQ_HIGH_WATER)
{
uint64_t size = 0;
if (!get_suffixed_size(value, &size))
{
config_runtime_error("Invalid value for %s: %s", CN_WRITEQ_HIGH_WATER, value);
}
else if (size < MIN_WRITEQ_HIGH_WATER)
{
config_runtime_error("The specified '%s' is smaller than the minimum allowed size %lu.",
CN_WRITEQ_HIGH_WATER, MIN_WRITEQ_HIGH_WATER);
}
else
{
rval = true;
config_set_writeq_high_water(size);
MXS_NOTICE("'%s' set to: %lu", CN_WRITEQ_HIGH_WATER, size);
}
}
else if (key == CN_WRITEQ_LOW_WATER)
{
uint64_t size = 0;
if (!get_suffixed_size(value, &size))
{
config_runtime_error("Invalid value for '%s': %s", CN_WRITEQ_LOW_WATER, value);
}
else if (size < MIN_WRITEQ_LOW_WATER)
{
config_runtime_error("The specified '%s' is smaller than the minimum allowed size %lu.",
CN_WRITEQ_LOW_WATER, MIN_WRITEQ_LOW_WATER);
}
else
{
rval = true;
config_set_writeq_low_water(size);
MXS_NOTICE("'%s' set to: %lu", CN_WRITEQ_LOW_WATER, size);
}
}
else if (key == CN_MS_TIMESTAMP)
{
mxs_log_set_highprecision_enabled(config_truth_value(value));
rval = true;
}
else if (key == CN_SKIP_PERMISSION_CHECKS)
{
cnf.skip_permission_checks = config_truth_value(value);
rval = true;
}
else if (key == CN_QUERY_RETRIES)
{
int intval = get_positive_int(value);
if (intval)
{
cnf.query_retries = intval;
rval = true;
}
else
{
config_runtime_error("Invalid timeout value for '%s': %s", CN_QUERY_RETRIES, value);
}
}
else if (key == CN_QUERY_RETRY_TIMEOUT)
{
int intval = get_positive_int(value);
if (intval)
{
cnf.query_retry_timeout = intval;
rval = true;
}
else
{
config_runtime_error("Invalid timeout value for '%s': %s", CN_QUERY_RETRY_TIMEOUT, value);
}
}
else if (key == CN_RETAIN_LAST_STATEMENTS)
{
int intval = get_positive_int(value);
if (intval)
{
session_set_retain_last_statements(intval);
rval = true;
}
else
{
config_runtime_error("Invalid value for '%s': %s", CN_RETAIN_LAST_STATEMENTS, value);
}
}
else if (key == CN_DUMP_LAST_STATEMENTS)
{
rval = true;
if (strcmp(value, "on_close") == 0)
{
session_set_dump_statements(SESSION_DUMP_STATEMENTS_ON_CLOSE);
}
else if (strcmp(value, "on_error") == 0)
{
session_set_dump_statements(SESSION_DUMP_STATEMENTS_ON_ERROR);
}
else if (strcmp(value, "never") == 0)
{
session_set_dump_statements(SESSION_DUMP_STATEMENTS_NEVER);
}
else
{
rval = false;
config_runtime_error("%s can have the values 'never', 'on_close' or 'on_error'.",
CN_DUMP_LAST_STATEMENTS);
}
}
else if (key == CN_SESSION_TRACE)
{
char* endptr;
long intval = strtol(value, &endptr, 10);
if (*endptr == '\0' && intval >= 0)
{
session_set_session_trace(intval);
mxb_log_set_session_trace(true);
rval = true;
}
else
{
rval = false;
config_runtime_error("Invalid value for '%s': %s", CN_SESSION_TRACE, value);
}
}
else if (config_can_modify_at_runtime(key.c_str()))
{
config_runtime_error("Global parameter '%s' cannot be modified at runtime", name);
}
else
{
config_runtime_error("Unknown global parameter: %s=%s", name, value);
}
if (rval)
{
config_global_serialize();
}
return rval;
}
bool runtime_create_listener(Service* service,
const char* name,
const char* addr,
const char* port,
const char* proto,
const char* auth,
const char* auth_opt,
const char* ssl_key,
const char* ssl_cert,
const char* ssl_ca,
const char* ssl_version,
const char* ssl_depth,
const char* verify_ssl)
{
if (addr == NULL || strcasecmp(addr, CN_DEFAULT) == 0)
{
addr = "::";
}
if (port == NULL || strcasecmp(port, CN_DEFAULT) == 0)
{
port = "3306";
}
if (proto == NULL || strcasecmp(proto, CN_DEFAULT) == 0)
{
proto = "mariadbclient";
}
if (auth && strcasecmp(auth, CN_DEFAULT) == 0)
{
/** Set auth to NULL so the protocol default authenticator is used */
auth = NULL;
}
if (auth_opt && strcasecmp(auth_opt, CN_DEFAULT) == 0)
{
/** Don't pass options to the authenticator */
auth_opt = NULL;
}
unsigned short u_port = atoi(port);
bool rval = false;
std::lock_guard<std::mutex> guard(crt_lock);
if (!serviceHasListener(service, name, proto, addr, u_port))
{
SSL_LISTENER* ssl = NULL;
if (ssl_key && ssl_cert && ssl_ca
&& (ssl =
create_ssl(name,
ssl_key,
ssl_cert,
ssl_ca,
ssl_version,
ssl_depth,
verify_ssl)) == NULL)
{
MXS_ERROR("SSL initialization for listener '%s' failed.", name);
config_runtime_error("SSL initialization for listener '%s' failed.", name);
}
else
{
const char* print_addr = addr ? addr : "::";
SERV_LISTENER* listener = serviceCreateListener(service,
name,
proto,
addr,
u_port,
auth,
auth_opt,
ssl);
if (listener && listener_serialize(listener))
{
MXS_NOTICE("Created %slistener '%s' at %s:%s for service '%s'",
ssl ? "TLS encrypted " : "",
name,
print_addr,
port,
service->name);
if (serviceLaunchListener(service, listener))
{
rval = true;
}
else
{
MXS_ERROR("Listener '%s' was created but failed to start it.", name);
config_runtime_error("Listener '%s' was created but failed to start it.", name);
}
}
else
{
MXS_ERROR("Failed to create listener '%s' at %s:%s.", name, print_addr, port);
config_runtime_error("Failed to create listener '%s' at %s:%s.", name, print_addr, port);
}
}
}
else
{
config_runtime_error("Listener '%s' already exists", name);
}
return rval;
}
bool runtime_destroy_listener(Service* service, const char* name)
{
char filename[PATH_MAX];
snprintf(filename, sizeof(filename), "%s/%s.cnf", get_config_persistdir(), name);
std::lock_guard<std::mutex> guard(crt_lock);
if (unlink(filename) == -1)
{
if (errno != ENOENT)
{
MXS_ERROR("Failed to remove persisted listener configuration '%s': %d, %s",
filename, errno, mxs_strerror(errno));
return false;
}
else
{
MXS_WARNING("Persisted configuration file for listener '%s' was not found. This means that the "
"listener was not created at runtime. Remove the listener manually from the correct "
"configuration file to permanently destroy the listener.", name);
}
}
bool rval = false;
if (!service_remove_listener(service, name))
{
MXS_ERROR("Failed to destroy listener '%s' for service '%s'", name, service->name);
config_runtime_error("Failed to destroy listener '%s' for service '%s'", name, service->name);
}
else
{
rval = true;
MXS_NOTICE("Destroyed listener '%s' for service '%s'. The listener "
"will be removed after the next restart of MaxScale or "
"when the associated service is destroyed.",
name,
service->name);
}
return rval;
}
bool runtime_create_monitor(const char* name, const char* module)
{
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = false;
if (monitor_find(name) == NULL)
{
MXS_MONITOR* monitor = monitor_repurpose_destroyed(name, module);
if (monitor)
{
MXS_DEBUG("Repurposed monitor '%s'", name);
}
else
{
MXS_CONFIG_PARAMETER* params;
bool ok;
tie(ok, params) = load_defaults(module, MODULE_MONITOR, CN_MONITOR);
if (ok)
{
if ((monitor = monitor_create(name, module, params)) == NULL)
{
config_runtime_error("Could not create monitor '%s' with module '%s'", name, module);
}
config_parameter_free(params);
}
}
if (monitor)
{
if (monitor_serialize(monitor))
{
MXS_NOTICE("Created monitor '%s'", name);
rval = true;
}
else
{
config_runtime_error("Failed to serialize monitor '%s'", name);
}
}
}
else
{
config_runtime_error("Can't create monitor '%s', it already exists", name);
}
return rval;
}
bool runtime_create_filter(const char* name, const char* module, MXS_CONFIG_PARAMETER* params)
{
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = false;
if (!filter_find(name))
{
SFilterDef filter;
CONFIG_CONTEXT ctx {(char*)""};
bool ok;
tie(ok, ctx.parameters) = load_defaults(module, MODULE_FILTER, CN_FILTER);
if (ok)
{
for (MXS_CONFIG_PARAMETER* p = params; p; p = p->next)
{
config_replace_param(&ctx, p->name, p->value);
}
if (!(filter = filter_alloc(name, module, ctx.parameters)))
{
config_runtime_error("Could not create filter '%s' with module '%s'", name, module);
}
config_parameter_free(ctx.parameters);
}
if (filter)
{
if (filter_serialize(filter))
{
MXS_NOTICE("Created filter '%s'", name);
rval = true;
}
else
{
config_runtime_error("Failed to serialize filter '%s'", name);
}
}
}
else
{
config_runtime_error("Can't create filter '%s', it already exists", name);
}
return rval;
}
bool runtime_destroy_filter(const SFilterDef& filter)
{
mxb_assert(filter);
bool rval = false;
std::lock_guard<std::mutex> guard(crt_lock);
if (filter_can_be_destroyed(filter))
{
filter_destroy(filter);
rval = true;
}
else
{
config_runtime_error("Filter '%s' cannot be destroyed: Remove it from all services "
"first",
filter->name.c_str());
}
return rval;
}
static bool runtime_create_service(const char* name, const char* router, MXS_CONFIG_PARAMETER* params)
{
std::lock_guard<std::mutex> guard(crt_lock);
bool rval = false;
if (service_internal_find(name) == NULL)
{
Service* service = NULL;
CONFIG_CONTEXT ctx {(char*)""};
bool ok;
tie(ok, ctx.parameters) = load_defaults(router, MODULE_ROUTER, CN_SERVICE);
if (ok)
{
for (MXS_CONFIG_PARAMETER* p = params; p; p = p->next)
{
config_replace_param(&ctx, p->name, p->value);
}
if ((service = service_alloc(name, router, ctx.parameters)) == NULL)
{
config_runtime_error("Could not create service '%s' with module '%s'", name, router);
}
config_parameter_free(ctx.parameters);
}
if (service)
{
if (service_serialize(service))
{
MXS_NOTICE("Created service '%s'", name);
rval = true;
}
else
{
config_runtime_error("Failed to serialize service '%s'", name);
}
}
}
else
{
config_runtime_error("Can't create service '%s', it already exists", name);
}
return rval;
}
bool runtime_destroy_service(Service* service)
{
bool rval = false;
std::lock_guard<std::mutex> guard(crt_lock);
mxb_assert(service && service->active);
if (service_can_be_destroyed(service))
{
service_destroy(service);
rval = true;
}
else
{
config_runtime_error("Service '%s' cannot be destroyed: Remove all servers and "
"destroy all listeners first",
service->name);
}
return rval;
}
bool runtime_destroy_monitor(MXS_MONITOR* monitor)
{
bool rval = false;
char filename[PATH_MAX];
snprintf(filename, sizeof(filename), "%s/%s.cnf", get_config_persistdir(), monitor->name);
std::lock_guard<std::mutex> guard(crt_lock);
if (unlink(filename) == -1 && errno != ENOENT)
{
MXS_ERROR("Failed to remove persisted monitor configuration '%s': %d, %s",
filename,
errno,
mxs_strerror(errno));
}
else
{
rval = true;
}
if (rval)
{
monitor_stop(monitor);
while (monitor->monitored_servers)
{
monitor_remove_server(monitor, monitor->monitored_servers->server);
}
monitor_deactivate(monitor);
MXS_NOTICE("Destroyed monitor '%s'", monitor->name);
}
return rval;
}
static MXS_CONFIG_PARAMETER* extract_parameters_from_json(json_t* json)
{
CONFIG_CONTEXT ctx {(char*)""};
if (json_t* parameters = mxs_json_pointer(json, MXS_JSON_PTR_PARAMETERS))
{
const char* key;
json_t* value;
json_object_foreach(parameters, key, value)
{
config_add_param(&ctx, key, json_string_value(value));
}
}
return ctx.parameters;
}
static bool extract_ordered_relations(json_t* json,
StringVector& relations,
const char* relation_type,
JsonValidator relation_check)
{
bool rval = true;
json_t* arr = mxs_json_pointer(json, relation_type);
if (arr && json_is_array(arr))
{
size_t size = json_array_size(arr);
for (size_t j = 0; j < size; j++)
{
json_t* obj = json_array_get(arr, j);
json_t* id = json_object_get(obj, CN_ID);
json_t* type = mxs_json_pointer(obj, CN_TYPE);
if (id && json_is_string(id)
&& type && json_is_string(type))
{
std::string id_value = json_string_value(id);
std::string type_value = json_string_value(type);
if (relation_check(type_value, id_value))
{
relations.push_back(id_value);
}
else
{
rval = false;
}
}
else
{
rval = false;
}
}
}
return rval;
}
static bool extract_relations(json_t* json,
StringSet& relations,
const char* relation_type,
JsonValidator relation_check)
{
StringVector values;
bool rval = extract_ordered_relations(json, values, relation_type, relation_check);
relations.insert(values.begin(), values.end());
return rval;
}
static inline bool is_null_relation(json_t* json, const char* relation)
{
std::string str(relation);
size_t pos = str.rfind("/data");
mxb_assert(pos != std::string::npos);
str = str.substr(0, pos);
json_t* data = mxs_json_pointer(json, relation);
json_t* base = mxs_json_pointer(json, str.c_str());
return (data && json_is_null(data)) || (base && json_is_null(base));
}
static const char* json_type_to_string(const json_t* json)
{
mxb_assert(json);
if (json_is_object(json))
{
return "an object";
}
else if (json_is_array(json))
{
return "an array";
}
else if (json_is_string(json))
{
return "a string";
}
else if (json_is_integer(json))
{
return "an integer";
}
else if (json_is_real(json))
{
return "a real number";
}
else if (json_is_boolean(json))
{
return "a boolean";
}
else if (json_is_null(json))
{
return "a null value";
}
else
{
mxb_assert(!true);
return "an unknown type";
}
}
static inline const char* get_string_or_null(json_t* json, const char* path)
{
const char* rval = NULL;
json_t* value = mxs_json_pointer(json, path);
if (value && json_is_string(value))
{
rval = json_string_value(value);
}
return rval;
}
bool runtime_is_string_or_null(json_t* json, const char* path)
{
bool rval = true;
json_t* value = mxs_json_pointer(json, path);
if (value && !json_is_string(value))
{
config_runtime_error("Parameter '%s' is not a string but %s", path, json_type_to_string(value));
rval = false;
}
return rval;
}
bool runtime_is_bool_or_null(json_t* json, const char* path)
{
bool rval = true;
json_t* value = mxs_json_pointer(json, path);
if (value && !json_is_boolean(value))
{
config_runtime_error("Parameter '%s' is not a boolean but %s", path, json_type_to_string(value));
rval = false;
}
return rval;
}
bool runtime_is_size_or_null(json_t* json, const char* path)
{
bool rval = true;
json_t* value = mxs_json_pointer(json, path);
if (value)
{
if (!json_is_integer(value) && !json_is_string(value))
{
config_runtime_error("Parameter '%s' is not an integer or a string but %s",
path,
json_type_to_string(value));
rval = false;
}
else if ((json_is_integer(value) && json_integer_value(value) < 0)
|| (json_is_string(value) && !get_suffixed_size(json_string_value(value), nullptr)))
{
config_runtime_error("Parameter '%s' is not a valid size", path);
rval = false;
}
}
return rval;
}
bool runtime_is_count_or_null(json_t* json, const char* path)
{
bool rval = true;
json_t* value = mxs_json_pointer(json, path);
if (value)
{
if (!json_is_integer(value))
{
config_runtime_error("Parameter '%s' is not an integer but %s", path, json_type_to_string(value));
rval = false;
}
else if (json_integer_value(value) < 0)
{
config_runtime_error("Parameter '%s' is a negative integer", path);
rval = false;
}
}
return rval;
}
/** Check that the body at least defies a data member */
static bool is_valid_resource_body(json_t* json)
{
bool rval = true;
if (mxs_json_pointer(json, MXS_JSON_PTR_DATA) == NULL)
{
config_runtime_error("No '%s' field defined", MXS_JSON_PTR_DATA);
rval = false;
}
else
{
// Check that the relationship JSON is well-formed
const std::vector<const char*> relations =
{
MXS_JSON_PTR_RELATIONSHIPS "/servers",
MXS_JSON_PTR_RELATIONSHIPS "/services",
MXS_JSON_PTR_RELATIONSHIPS "/monitors",
MXS_JSON_PTR_RELATIONSHIPS "/filters",
};
for (auto it = relations.begin(); it != relations.end(); it++)
{
json_t* j = mxs_json_pointer(json, *it);
if (j && !json_is_object(j))
{
config_runtime_error("Relationship '%s' is not an object", *it);
rval = false;
}
}
}
return rval;
}
static bool server_contains_required_fields(json_t* json)
{
json_t* id = mxs_json_pointer(json, MXS_JSON_PTR_ID);
json_t* port = mxs_json_pointer(json, MXS_JSON_PTR_PARAM_PORT);
json_t* address = mxs_json_pointer(json, MXS_JSON_PTR_PARAM_ADDRESS);
bool rval = false;
if (!id)
{
config_runtime_error("Request body does not define the '%s' field", MXS_JSON_PTR_ID);
}
else if (!json_is_string(id))
{
config_runtime_error("The '%s' field is not a string", MXS_JSON_PTR_ID);
}
else if (!address)
{
config_runtime_error("Request body does not define the '%s' field", MXS_JSON_PTR_PARAM_ADDRESS);
}
else if (!json_is_string(address))
{
config_runtime_error("The '%s' field is not a string", MXS_JSON_PTR_PARAM_ADDRESS);
}
else if (!port)
{
config_runtime_error("Request body does not define the '%s' field", MXS_JSON_PTR_PARAM_PORT);
}
else if (!json_is_integer(port))
{
config_runtime_error("The '%s' field is not an integer", MXS_JSON_PTR_PARAM_PORT);
}
else
{
rval = true;
}
return rval;
}
static bool server_relation_is_valid(const std::string& type, const std::string& value)
{
return (type == CN_SERVICES && service_internal_find(value.c_str()))
|| (type == CN_MONITORS && monitor_find(value.c_str()));
}
static bool filter_to_service_relation_is_valid(const std::string& type, const std::string& value)
{
return type == CN_SERVICES && service_internal_find(value.c_str());
}
static bool service_to_filter_relation_is_valid(const std::string& type, const std::string& value)
{
return type == CN_FILTERS && filter_find(value.c_str());
}
static bool unlink_server_from_objects(SERVER* server, StringSet& relations)
{
bool rval = true;
for (StringSet::iterator it = relations.begin(); it != relations.end(); it++)
{
if (!runtime_unlink_server(server, it->c_str()))
{
rval = false;
}
}
return rval;
}
static bool link_server_to_objects(SERVER* server, StringSet& relations)
{
bool rval = true;
for (StringSet::iterator it = relations.begin(); it != relations.end(); it++)
{
if (!runtime_link_server(server, it->c_str()))
{
unlink_server_from_objects(server, relations);
rval = false;
break;
}
}
return rval;
}
static std::string json_int_to_string(json_t* json)
{
char str[25]; // Enough to store any 64-bit integer value
int64_t i = json_integer_value(json);
snprintf(str, sizeof(str), "%ld", i);
return std::string(str);
}
static inline bool have_ssl_json(json_t* params)
{
return mxs_json_pointer(params, CN_SSL_KEY)
|| mxs_json_pointer(params, CN_SSL_CERT)
|| mxs_json_pointer(params, CN_SSL_CA_CERT);
}
namespace
{
enum object_type
{
OT_SERVER,
OT_LISTENER
};
}
static bool validate_ssl_json(json_t* params, object_type type)
{
bool rval = true;
if (runtime_is_string_or_null(params, CN_SSL_KEY)
&& runtime_is_string_or_null(params, CN_SSL_CERT)
&& runtime_is_string_or_null(params, CN_SSL_CA_CERT)
&& runtime_is_string_or_null(params, CN_SSL_VERSION)
&& runtime_is_count_or_null(params, CN_SSL_CERT_VERIFY_DEPTH))
{
json_t* key = mxs_json_pointer(params, CN_SSL_KEY);
json_t* cert = mxs_json_pointer(params, CN_SSL_CERT);
json_t* ca_cert = mxs_json_pointer(params, CN_SSL_CA_CERT);
if (type == OT_LISTENER && !(key && cert && ca_cert))
{
config_runtime_error("SSL configuration for listeners requires "
"'%s', '%s' and '%s' parameters",
CN_SSL_KEY,
CN_SSL_CERT,
CN_SSL_CA_CERT);
rval = false;
}
else if (type == OT_SERVER)
{
if (!ca_cert)
{
config_runtime_error("SSL configuration for servers requires "
"at least the '%s' parameter",
CN_SSL_CA_CERT);
rval = false;
}
else if ((key == nullptr) != (cert == nullptr))
{
config_runtime_error("Both '%s' and '%s' must be defined", CN_SSL_KEY, CN_SSL_CERT);
rval = false;
}
}
json_t* ssl_version = mxs_json_pointer(params, CN_SSL_VERSION);
const char* ssl_version_str = ssl_version ? json_string_value(ssl_version) : NULL;
if (ssl_version_str && string_to_ssl_method_type(ssl_version_str) == SERVICE_SSL_UNKNOWN)
{
config_runtime_error("Invalid value for '%s': %s", CN_SSL_VERSION, ssl_version_str);
rval = false;
}
}
return rval;
}
static bool process_ssl_parameters(SERVER* server, json_t* params)
{
mxb_assert(server->server_ssl == NULL);
bool rval = true;
if (have_ssl_json(params))
{
if (validate_ssl_json(params, OT_SERVER))
{
char buf[20]; // Enough to hold the string form of the ssl_cert_verify_depth
char buf_verify[20];// Enough to hold the string form of the ssl_verify_peer_certificate
const char* key = json_string_value(mxs_json_pointer(params, CN_SSL_KEY));
const char* cert = json_string_value(mxs_json_pointer(params, CN_SSL_CERT));
const char* ca = json_string_value(mxs_json_pointer(params, CN_SSL_CA_CERT));
const char* version = json_string_value(mxs_json_pointer(params, CN_SSL_VERSION));
const char* depth = NULL;
json_t* depth_json = mxs_json_pointer(params, CN_SSL_CERT_VERIFY_DEPTH);
if (depth_json)
{
snprintf(buf, sizeof(buf), "%lld", json_integer_value(depth_json));
depth = buf;
}
const char* verify = NULL;
json_t* verify_json = mxs_json_pointer(params, CN_SSL_VERIFY_PEER_CERTIFICATE);
if (verify_json)
{
snprintf(buf_verify, sizeof(buf), "%s", json_boolean_value(verify_json) ? "true" : "false");
verify = buf_verify;
}
if (!runtime_enable_server_ssl(server, key, cert, ca, version, depth, verify))
{
config_runtime_error("Failed to initialize SSL for server '%s'. See "
"error log for more details.",
server->name);
rval = false;
}
}
else
{
rval = false;
}
}
return rval;
}
SERVER* runtime_create_server_from_json(json_t* json)
{
SERVER* rval = NULL;
if (is_valid_resource_body(json)
&& server_contains_required_fields(json))
{
const char* name = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_ID));
const char* address = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_PARAM_ADDRESS));
/** The port needs to be in string format */
std::string port = json_int_to_string(mxs_json_pointer(json, MXS_JSON_PTR_PARAM_PORT));
/** Optional parameters */
const char* protocol = get_string_or_null(json, MXS_JSON_PTR_PARAM_PROTOCOL);
const char* authenticator = get_string_or_null(json, MXS_JSON_PTR_PARAM_AUTHENTICATOR);
StringSet relations;
if (extract_relations(json, relations, MXS_JSON_PTR_RELATIONSHIPS_SERVICES, server_relation_is_valid)
&& extract_relations(json,
relations,
MXS_JSON_PTR_RELATIONSHIPS_MONITORS,
server_relation_is_valid))
{
if (runtime_create_server(name, address, port.c_str(), protocol, authenticator))
{
rval = server_find_by_unique_name(name);
mxb_assert(rval);
json_t* param = mxs_json_pointer(json, MXS_JSON_PTR_PARAMETERS);
if (!process_ssl_parameters(rval, param)
|| !link_server_to_objects(rval, relations))
{
runtime_destroy_server(rval);
rval = NULL;
}
}
}
else
{
config_runtime_error("Invalid relationships in request JSON");
}
}
return rval;
}
bool server_to_object_relations(SERVER* server, json_t* old_json, json_t* new_json)
{
if (mxs_json_pointer(new_json, MXS_JSON_PTR_RELATIONSHIPS_SERVICES) == NULL
&& mxs_json_pointer(new_json, MXS_JSON_PTR_RELATIONSHIPS_MONITORS) == NULL)
{
/** No change to relationships */
return true;
}
const char* server_relation_types[] =
{
MXS_JSON_PTR_RELATIONSHIPS_SERVICES,
MXS_JSON_PTR_RELATIONSHIPS_MONITORS,
NULL
};
bool rval = true;
StringSet old_relations;
StringSet new_relations;
for (int i = 0; server_relation_types[i]; i++)
{
// Extract only changed or deleted relationships
if (is_null_relation(new_json, server_relation_types[i])
|| mxs_json_pointer(new_json, server_relation_types[i]))
{
if (!extract_relations(new_json,
new_relations,
server_relation_types[i],
server_relation_is_valid)
|| !extract_relations(old_json,
old_relations,
server_relation_types[i],
server_relation_is_valid))
{
rval = false;
break;
}
}
}
if (rval)
{
StringSet removed_relations;
StringSet added_relations;
std::set_difference(old_relations.begin(),
old_relations.end(),
new_relations.begin(),
new_relations.end(),
std::inserter(removed_relations, removed_relations.begin()));
std::set_difference(new_relations.begin(),
new_relations.end(),
old_relations.begin(),
old_relations.end(),
std::inserter(added_relations, added_relations.begin()));
if (!unlink_server_from_objects(server, removed_relations)
|| !link_server_to_objects(server, added_relations))
{
rval = false;
}
}
return rval;
}
bool runtime_alter_server_from_json(SERVER* server, json_t* new_json)
{
bool rval = false;
std::unique_ptr<json_t> old_json(server_to_json(server, ""));
mxb_assert(old_json.get());
if (is_valid_resource_body(new_json)
&& server_to_object_relations(server, old_json.get(), new_json))
{
rval = true;
json_t* parameters = mxs_json_pointer(new_json, MXS_JSON_PTR_PARAMETERS);
json_t* old_parameters = mxs_json_pointer(old_json.get(), MXS_JSON_PTR_PARAMETERS);
mxb_assert(old_parameters);
if (parameters)
{
const char* key;
json_t* value;
json_object_foreach(parameters, key, value)
{
json_t* new_val = json_object_get(parameters, key);
json_t* old_val = json_object_get(old_parameters, key);
if (old_val && new_val && mxs::json_to_string(new_val) == mxs::json_to_string(old_val))
{
/** No change in values */
}
else if (!runtime_alter_server(server, key, mxs::json_to_string(value).c_str()))
{
rval = false;
}
}
}
}
return rval;
}
static bool is_valid_relationship_body(json_t* json)
{
bool rval = true;
json_t* obj = mxs_json_pointer(json, MXS_JSON_PTR_DATA);
if (!obj)
{
config_runtime_error("Field '%s' is not defined", MXS_JSON_PTR_DATA);
rval = false;
}
else if (!json_is_array(obj) && !json_is_null(obj))
{
config_runtime_error("Field '%s' is not an array", MXS_JSON_PTR_DATA);
rval = false;
}
return rval;
}
bool runtime_alter_server_relationships_from_json(SERVER* server, const char* type, json_t* json)
{
bool rval = false;
std::unique_ptr<json_t> old_json(server_to_json(server, ""));
mxb_assert(old_json.get());
if (is_valid_relationship_body(json))
{
std::unique_ptr<json_t> j(json_pack("{s: {s: {s: {s: O}}}}",
"data",
"relationships",
type,
"data",
json_object_get(json, "data")));
if (server_to_object_relations(server, old_json.get(), j.get()))
{
rval = true;
}
}
return rval;
}
static bool object_relation_is_valid(const std::string& type, const std::string& value)
{
return type == CN_SERVERS && server_find_by_unique_name(value.c_str());
}
static bool filter_relation_is_valid(const std::string& type, const std::string& value)
{
return type == CN_FILTERS && filter_find(value.c_str());
}
//
// Constants for validate_object_json
//
const Relationship object_to_server
{
MXS_JSON_PTR_RELATIONSHIPS_SERVERS,
object_relation_is_valid
};
const Relationship filter_to_service
{
MXS_JSON_PTR_RELATIONSHIPS_SERVICES,
filter_to_service_relation_is_valid
};
const Relationship service_to_filter
{
MXS_JSON_PTR_RELATIONSHIPS_FILTERS,
service_to_filter_relation_is_valid
};
/**
* @brief Do a coarse validation of the monitor JSON
*
* @param json JSON to validate
* @param paths List of paths that must be string values
* @param relationships List of JSON paths and validation functions to check
*
* @return True of the JSON is valid
*/
static bool validate_object_json(json_t* json,
std::vector<std::string> paths,
std::vector<Relationship> relationships)
{
bool rval = false;
json_t* value;
if (is_valid_resource_body(json))
{
if (!(value = mxs_json_pointer(json, MXS_JSON_PTR_ID)))
{
config_runtime_error("Value not found: '%s'", MXS_JSON_PTR_ID);
}
else if (!json_is_string(value))
{
config_runtime_error("Value '%s' is not a string", MXS_JSON_PTR_ID);
}
else
{
for (const auto& a : paths)
{
if (!(value = mxs_json_pointer(json, a.c_str())))
{
config_runtime_error("Invalid value for '%s'", a.c_str());
}
else if (!json_is_string(value))
{
config_runtime_error("Value '%s' is not a string", a.c_str());
}
}
for (const auto& a : relationships)
{
StringSet relations;
if (extract_relations(json, relations, a.first, a.second))
{
rval = true;
}
}
}
}
return rval;
}
static bool unlink_object_from_servers(const char* target, StringSet& relations)
{
bool rval = true;
for (StringSet::iterator it = relations.begin(); it != relations.end(); it++)
{
SERVER* server = server_find_by_unique_name(it->c_str());
if (!server || !runtime_unlink_server(server, target))
{
rval = false;
break;
}
}
return rval;
}
static bool link_object_to_servers(const char* target, StringSet& relations)
{
bool rval = true;
for (StringSet::iterator it = relations.begin(); it != relations.end(); it++)
{
SERVER* server = server_find_by_unique_name(it->c_str());
if (!server || !runtime_link_server(server, target))
{
unlink_server_from_objects(server, relations);
rval = false;
break;
}
}
return rval;
}
static bool validate_monitor_json(json_t* json)
{
bool rval = true;
json_t* params = mxs_json_pointer(json, MXS_JSON_PTR_PARAMETERS);
for (auto a : {CN_USER, CN_PASSWORD})
{
if (!mxs_json_pointer(params, a))
{
config_runtime_error("Mandatory parameter '%s' is not defined", a);
rval = false;
break;
}
}
return rval;
}
MXS_MONITOR* runtime_create_monitor_from_json(json_t* json)
{
MXS_MONITOR* rval = NULL;
if (validate_object_json(json, {MXS_JSON_PTR_MODULE}, {object_to_server})
&& validate_monitor_json(json))
{
const char* name = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_ID));
const char* module = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_MODULE));
if (runtime_create_monitor(name, module))
{
rval = monitor_find(name);
mxb_assert(rval);
if (!runtime_alter_monitor_from_json(rval, json))
{
runtime_destroy_monitor(rval);
rval = NULL;
}
else
{
monitor_start(rval, rval->parameters);
}
}
}
return rval;
}
bool runtime_create_filter_from_json(json_t* json)
{
bool rval = false;
if (validate_object_json(json, {MXS_JSON_PTR_MODULE}, {filter_to_service}))
{
const char* name = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_ID));
const char* module = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_MODULE));
MXS_CONFIG_PARAMETER* params = extract_parameters_from_json(json);
rval = runtime_create_filter(name, module, params);
config_parameter_free(params);
}
return rval;
}
Service* runtime_create_service_from_json(json_t* json)
{
Service* rval = NULL;
if (validate_object_json(json, {MXS_JSON_PTR_ROUTER}, {service_to_filter, object_to_server}))
{
const char* name = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_ID));
const char* router = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_ROUTER));
MXS_CONFIG_PARAMETER* params = extract_parameters_from_json(json);
if (runtime_create_service(name, router, params))
{
rval = service_internal_find(name);
mxb_assert(rval);
// Performing an alter right after creation takes care of server relationships
if (!runtime_alter_service_from_json(rval, json))
{
runtime_destroy_service(rval);
rval = NULL;
}
else
{
// This function sets the service in the correct state
serviceStart(rval);
}
}
config_parameter_free(params);
}
return rval;
}
bool object_to_server_relations(const char* target, json_t* old_json, json_t* new_json)
{
if (mxs_json_pointer(new_json, MXS_JSON_PTR_RELATIONSHIPS_SERVERS) == NULL)
{
/** No change to relationships */
return true;
}
bool rval = false;
StringSet old_relations;
StringSet new_relations;
const char* object_relation = MXS_JSON_PTR_RELATIONSHIPS_SERVERS;
if (extract_relations(old_json, old_relations, object_relation, object_relation_is_valid)
&& extract_relations(new_json, new_relations, object_relation, object_relation_is_valid))
{
StringSet removed_relations;
StringSet added_relations;
std::set_difference(old_relations.begin(),
old_relations.end(),
new_relations.begin(),
new_relations.end(),
std::inserter(removed_relations, removed_relations.begin()));
std::set_difference(new_relations.begin(),
new_relations.end(),
old_relations.begin(),
old_relations.end(),
std::inserter(added_relations, added_relations.begin()));
if (unlink_object_from_servers(target, removed_relations)
&& link_object_to_servers(target, added_relations))
{
rval = true;
}
}
else
{
config_runtime_error("Invalid object relations for '%s'", target);
}
return rval;
}
bool service_to_filter_relations(Service* service, json_t* old_json, json_t* new_json)
{
if (mxs_json_pointer(new_json, MXS_JSON_PTR_RELATIONSHIPS) == NULL)
{
// No relationships defined, nothing to change
return true;
}
bool rval = false;
StringVector old_relations;
StringVector new_relations;
const char* filter_relation = MXS_JSON_PTR_RELATIONSHIPS_FILTERS;
if (extract_ordered_relations(old_json, old_relations, filter_relation, filter_relation_is_valid)
&& extract_ordered_relations(new_json, new_relations, filter_relation, filter_relation_is_valid))
{
if (old_relations == new_relations || service->set_filters(new_relations))
{
// Either no change in relationships took place or we successfully
// updated the filter relationships
rval = true;
}
}
else
{
config_runtime_error("Invalid object relations for '%s'", service->name);
}
return rval;
}
bool runtime_alter_monitor_from_json(MXS_MONITOR* monitor, json_t* new_json)
{
bool rval = false;
std::unique_ptr<json_t> old_json(monitor_to_json(monitor, ""));
mxb_assert(old_json.get());
if (is_valid_resource_body(new_json)
&& object_to_server_relations(monitor->name, old_json.get(), new_json))
{
rval = true;
bool changed = false;
json_t* parameters = mxs_json_pointer(new_json, MXS_JSON_PTR_PARAMETERS);
json_t* old_parameters = mxs_json_pointer(old_json.get(), MXS_JSON_PTR_PARAMETERS);
mxb_assert(old_parameters);
if (parameters)
{
bool restart = monitor->state != MONITOR_STATE_STOPPED;
monitor_stop(monitor);
const char* key;
json_t* value;
json_object_foreach(parameters, key, value)
{
json_t* new_val = json_object_get(parameters, key);
json_t* old_val = json_object_get(old_parameters, key);
if (old_val && new_val && mxs::json_to_string(new_val) == mxs::json_to_string(old_val))
{
/** No change in values */
}
else if (do_alter_monitor(monitor, key, mxs::json_to_string(value).c_str()))
{
changed = true;
}
else
{
rval = false;
break;
}
}
if (rval && changed)
{
monitor_serialize(monitor);
}
if (restart)
{
monitor_start(monitor, monitor->parameters);
}
}
}
return rval;
}
bool runtime_alter_monitor_relationships_from_json(MXS_MONITOR* monitor, json_t* json)
{
bool rval = false;
std::unique_ptr<json_t> old_json(monitor_to_json(monitor, ""));
mxb_assert(old_json.get());
if (is_valid_relationship_body(json))
{
std::unique_ptr<json_t> j(json_pack("{s: {s: {s: {s: O}}}}",
"data",
"relationships",
"servers",
"data",
json_object_get(json, "data")));
if (object_to_server_relations(monitor->name, old_json.get(), j.get()))
{
rval = true;
}
}
return rval;
}
bool runtime_alter_service_relationships_from_json(Service* service, const char* type, json_t* json)
{
bool rval = false;
std::unique_ptr<json_t> old_json(service_to_json(service, ""));
mxb_assert(old_json.get());
if (is_valid_relationship_body(json))
{
std::unique_ptr<json_t> j(json_pack("{s: {s: {s: {s: O}}}}",
"data",
"relationships",
type,
"data",
json_object_get(json, "data")));
if (strcmp(type, CN_SERVERS) == 0)
{
rval = object_to_server_relations(service->name, old_json.get(), j.get());
}
else
{
mxb_assert(strcmp(type, CN_FILTERS) == 0);
rval = service_to_filter_relations(service, old_json.get(), j.get());
}
}
return rval;
}
/**
* @brief Check if the service parameter can be altered at runtime
*
* @param key Parameter name
* @return True if the parameter can be altered
*/
static bool is_dynamic_param(const std::string& key)
{
return key != CN_TYPE
&& key != CN_ROUTER
&& key != CN_SERVERS;
}
bool runtime_alter_service_from_json(Service* service, json_t* new_json)
{
bool rval = false;
std::unique_ptr<json_t> old_json(service_to_json(service, ""));
mxb_assert(old_json.get());
if (is_valid_resource_body(new_json)
&& object_to_server_relations(service->name, old_json.get(), new_json)
&& service_to_filter_relations(service, old_json.get(), new_json))
{
rval = true;
json_t* parameters = mxs_json_pointer(new_json, MXS_JSON_PTR_PARAMETERS);
json_t* old_parameters = mxs_json_pointer(old_json.get(), MXS_JSON_PTR_PARAMETERS);
mxb_assert(old_parameters);
if (parameters)
{
/** Create a set of accepted service parameters */
StringSet paramset;
for (int i = 0; config_service_params[i].name; i++)
{
if (is_dynamic_param(config_service_params[i].name))
{
paramset.insert(config_service_params[i].name);
}
}
const MXS_MODULE* mod = get_module(service->routerModule, MODULE_ROUTER);
for (int i = 0; mod->parameters[i].name; i++)
{
paramset.insert(mod->parameters[i].name);
}
const char* key;
json_t* value;
json_object_foreach(parameters, key, value)
{
json_t* new_val = json_object_get(parameters, key);
json_t* old_val = json_object_get(old_parameters, key);
if (old_val && new_val && mxs::json_to_string(new_val) == mxs::json_to_string(old_val))
{
/** No change in values */
}
else if (paramset.find(key) != paramset.end())
{
/** Parameter can be altered */
if (!runtime_alter_service(service, key, mxs::json_to_string(value).c_str()))
{
rval = false;
}
}
else
{
std::string v = mxs::json_to_string(value);
if (!is_dynamic_param(key))
{
config_runtime_error("Runtime modifications to static service "
"parameters is not supported: %s=%s",
key,
v.c_str());
}
else
{
config_runtime_error("Parameter '%s' cannot be modified at runtime", key);
}
rval = false;
}
}
}
}
return rval;
}
bool validate_logs_json(json_t* json)
{
json_t* param = mxs_json_pointer(json, MXS_JSON_PTR_PARAMETERS);
bool rval = false;
if (param && json_is_object(param))
{
rval = runtime_is_bool_or_null(param, "highprecision")
&& runtime_is_bool_or_null(param, "maxlog")
&& runtime_is_bool_or_null(param, "syslog")
&& runtime_is_bool_or_null(param, "log_info")
&& runtime_is_bool_or_null(param, "log_warning")
&& runtime_is_bool_or_null(param, "log_notice")
&& runtime_is_bool_or_null(param, "log_debug")
&& runtime_is_count_or_null(param, "throttling/count")
&& runtime_is_count_or_null(param, "throttling/suppress_ms")
&& runtime_is_count_or_null(param, "throttling/window_ms");
}
return rval;
}
bool runtime_alter_logs_from_json(json_t* json)
{
bool rval = false;
if (validate_logs_json(json))
{
json_t* param = mxs_json_pointer(json, MXS_JSON_PTR_PARAMETERS);
json_t* value;
rval = true;
if ((value = mxs_json_pointer(param, "highprecision")))
{
mxs_log_set_highprecision_enabled(json_boolean_value(value));
}
if ((value = mxs_json_pointer(param, "maxlog")))
{
mxs_log_set_maxlog_enabled(json_boolean_value(value));
}
if ((value = mxs_json_pointer(param, "syslog")))
{
mxs_log_set_syslog_enabled(json_boolean_value(value));
}
if ((value = mxs_json_pointer(param, "log_info")))
{
mxs_log_set_priority_enabled(LOG_INFO, json_boolean_value(value));
}
if ((value = mxs_json_pointer(param, "log_warning")))
{
mxs_log_set_priority_enabled(LOG_WARNING, json_boolean_value(value));
}
if ((value = mxs_json_pointer(param, "log_notice")))
{
mxs_log_set_priority_enabled(LOG_NOTICE, json_boolean_value(value));
}
if ((value = mxs_json_pointer(param, "log_debug")))
{
mxs_log_set_priority_enabled(LOG_DEBUG, json_boolean_value(value));
}
if ((param = mxs_json_pointer(param, "throttling")) && json_is_object(param))
{
MXS_LOG_THROTTLING throttle;
mxs_log_get_throttling(&throttle);
if ((value = mxs_json_pointer(param, "count")))
{
throttle.count = json_integer_value(value);
}
if ((value = mxs_json_pointer(param, "suppress_ms")))
{
throttle.suppress_ms = json_integer_value(value);
}
if ((value = mxs_json_pointer(param, "window_ms")))
{
throttle.window_ms = json_integer_value(value);
}
mxs_log_set_throttling(&throttle);
}
}
return rval;
}
static bool validate_listener_json(json_t* json)
{
bool rval = false;
json_t* param;
if (!(param = mxs_json_pointer(json, MXS_JSON_PTR_ID)))
{
config_runtime_error("Value not found: '%s'", MXS_JSON_PTR_ID);
}
else if (!json_is_string(param))
{
config_runtime_error("Value '%s' is not a string", MXS_JSON_PTR_ID);
}
else if (!(param = mxs_json_pointer(json, MXS_JSON_PTR_PARAMETERS)))
{
config_runtime_error("Value not found: '%s'", MXS_JSON_PTR_PARAMETERS);
}
else if (!json_is_object(param))
{
config_runtime_error("Value '%s' is not an object", MXS_JSON_PTR_PARAMETERS);
}
else if (runtime_is_count_or_null(param, CN_PORT)
&& runtime_is_string_or_null(param, CN_ADDRESS)
&& runtime_is_string_or_null(param, CN_AUTHENTICATOR)
&& runtime_is_string_or_null(param, CN_AUTHENTICATOR_OPTIONS)
&& (!have_ssl_json(param) || validate_ssl_json(param, OT_LISTENER)))
{
rval = true;
}
return rval;
}
bool runtime_create_listener_from_json(Service* service, json_t* json)
{
bool rval = false;
if (validate_listener_json(json))
{
std::string port = json_int_to_string(mxs_json_pointer(json, MXS_JSON_PTR_PARAM_PORT));
const char* id = get_string_or_null(json, MXS_JSON_PTR_ID);
const char* address = get_string_or_null(json, MXS_JSON_PTR_PARAM_ADDRESS);
const char* protocol = get_string_or_null(json, MXS_JSON_PTR_PARAM_PROTOCOL);
const char* authenticator = get_string_or_null(json, MXS_JSON_PTR_PARAM_AUTHENTICATOR);
const char* authenticator_options =
get_string_or_null(json, MXS_JSON_PTR_PARAM_AUTHENTICATOR_OPTIONS);
const char* ssl_key = get_string_or_null(json, MXS_JSON_PTR_PARAM_SSL_KEY);
const char* ssl_cert = get_string_or_null(json, MXS_JSON_PTR_PARAM_SSL_CERT);
const char* ssl_ca_cert = get_string_or_null(json, MXS_JSON_PTR_PARAM_SSL_CA_CERT);
const char* ssl_version = get_string_or_null(json, MXS_JSON_PTR_PARAM_SSL_VERSION);
const char* ssl_cert_verify_depth =
get_string_or_null(json, MXS_JSON_PTR_PARAM_SSL_CERT_VERIFY_DEPTH);
const char* ssl_verify_peer_certificate = get_string_or_null(json,
MXS_JSON_PTR_PARAM_SSL_VERIFY_PEER_CERT);
rval = runtime_create_listener(service,
id,
address,
port.c_str(),
protocol,
authenticator,
authenticator_options,
ssl_key,
ssl_cert,
ssl_ca_cert,
ssl_version,
ssl_cert_verify_depth,
ssl_verify_peer_certificate);
}
return rval;
}
json_t* runtime_get_json_error()
{
json_t* obj = NULL;
std::string errmsg = runtime_get_error();
if (!errmsg.empty())
{
obj = mxs_json_error("%s", errmsg.c_str());
}
return obj;
}
bool validate_user_json(json_t* json)
{
bool rval = false;
json_t* id = mxs_json_pointer(json, MXS_JSON_PTR_ID);
json_t* type = mxs_json_pointer(json, MXS_JSON_PTR_TYPE);
json_t* password = mxs_json_pointer(json, MXS_JSON_PTR_PASSWORD);
json_t* account = mxs_json_pointer(json, MXS_JSON_PTR_ACCOUNT);
if (!id)
{
config_runtime_error("Request body does not define the '%s' field", MXS_JSON_PTR_ID);
}
else if (!json_is_string(id))
{
config_runtime_error("The '%s' field is not a string", MXS_JSON_PTR_ID);
}
else if (!type)
{
config_runtime_error("Request body does not define the '%s' field", MXS_JSON_PTR_TYPE);
}
else if (!json_is_string(type))
{
config_runtime_error("The '%s' field is not a string", MXS_JSON_PTR_TYPE);
}
else if (!account)
{
config_runtime_error("Request body does not define the '%s' field", MXS_JSON_PTR_ACCOUNT);
}
else if (!json_is_string(account))
{
config_runtime_error("The '%s' field is not a string", MXS_JSON_PTR_ACCOUNT);
}
else if (json_to_account_type(account) == USER_ACCOUNT_UNKNOWN)
{
config_runtime_error("The '%s' field is not a valid account value", MXS_JSON_PTR_ACCOUNT);
}
else
{
if (strcmp(json_string_value(type), CN_INET) == 0)
{
if (!password)
{
config_runtime_error("Request body does not define the '%s' field", MXS_JSON_PTR_PASSWORD);
}
else if (!json_is_string(password))
{
config_runtime_error("The '%s' field is not a string", MXS_JSON_PTR_PASSWORD);
}
else
{
rval = true;
}
}
else if (strcmp(json_string_value(type), CN_UNIX) == 0)
{
rval = true;
}
else
{
config_runtime_error("Invalid value for field '%s': %s",
MXS_JSON_PTR_TYPE,
json_string_value(type));
}
}
return rval;
}
bool runtime_create_user_from_json(json_t* json)
{
bool rval = false;
if (validate_user_json(json))
{
const char* user = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_ID));
const char* password = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_PASSWORD));
std::string strtype = json_string_value(mxs_json_pointer(json, MXS_JSON_PTR_TYPE));
user_account_type type = json_to_account_type(mxs_json_pointer(json, MXS_JSON_PTR_ACCOUNT));
const char* err = NULL;
if (strtype == CN_INET && (err = admin_add_inet_user(user, password, type)) == ADMIN_SUCCESS)
{
MXS_NOTICE("Create network user '%s'", user);
rval = true;
}
else if (strtype == CN_UNIX && (err = admin_enable_linux_account(user, type)) == ADMIN_SUCCESS)
{
MXS_NOTICE("Enabled account '%s'", user);
rval = true;
}
else if (err)
{
config_runtime_error("Failed to add user '%s': %s", user, err);
}
}
return rval;
}
bool runtime_remove_user(const char* id, enum user_type type)
{
bool rval = false;
const char* err = type == USER_TYPE_INET ?
admin_remove_inet_user(id) :
admin_disable_linux_account(id);
if (err == ADMIN_SUCCESS)
{
MXS_NOTICE("%s '%s'",
type == USER_TYPE_INET ?
"Deleted network user" : "Disabled account",
id);
rval = true;
}
else
{
config_runtime_error("Failed to remove user '%s': %s", id, err);
}
return rval;
}
bool validate_maxscale_json(json_t* json)
{
bool rval = false;
json_t* param = mxs_json_pointer(json, MXS_JSON_PTR_PARAMETERS);
if (param)
{
rval = runtime_is_count_or_null(param, CN_AUTH_CONNECT_TIMEOUT)
&& runtime_is_count_or_null(param, CN_AUTH_READ_TIMEOUT)
&& runtime_is_count_or_null(param, CN_AUTH_WRITE_TIMEOUT)
&& runtime_is_bool_or_null(param, CN_ADMIN_AUTH)
&& runtime_is_bool_or_null(param, CN_ADMIN_LOG_AUTH_FAILURES)
&& runtime_is_size_or_null(param, CN_QUERY_CLASSIFIER_CACHE_SIZE);
}
return rval;
}
bool ignored_core_parameters(const char* key)
{
static const char* params[] =
{
"libdir",
"datadir",
"process_datadir",
"cachedir",
"configdir",
"config_persistdir",
"module_configdir",
"piddir",
"logdir",
"langdir",
"execdir",
"connector_plugindir",
NULL
};
for (int i = 0; params[i]; i++)
{
if (strcmp(key, params[i]) == 0)
{
return true;
}
}
return false;
}
bool runtime_alter_maxscale_from_json(json_t* new_json)
{
bool rval = false;
if (validate_maxscale_json(new_json))
{
rval = true;
json_t* old_json = config_maxscale_to_json("");
mxb_assert(old_json);
json_t* new_param = mxs_json_pointer(new_json, MXS_JSON_PTR_PARAMETERS);
json_t* old_param = mxs_json_pointer(old_json, MXS_JSON_PTR_PARAMETERS);
const char* key;
json_t* value;
json_object_foreach(new_param, key, value)
{
json_t* new_val = json_object_get(new_param, key);
json_t* old_val = json_object_get(old_param, key);
if (old_val && new_val && mxs::json_to_string(new_val) == mxs::json_to_string(old_val))
{
/** No change in values */
}
else if (ignored_core_parameters(key))
{
/** We can't change these at runtime */
MXS_INFO("Ignoring runtime change to '%s': Cannot be altered at runtime", key);
}
else if (!runtime_alter_maxscale(key, mxs::json_to_string(value).c_str()))
{
rval = false;
}
}
}
return rval;
}
bool runtime_alter_qc_from_json(json_t* json)
{
return qc_alter_from_json(json);
}
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