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MXS-2219 Perform cluster monitoring as well

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Now the monitor
- will frequently ping the health port of each server
- less frequently check from system.membership the actual
  number of available nodes
and act accordingly.

Currently, the updated servers are the ones listed in the conf
file. Subsequently this will be changed so that the servers listed
in the configuration file are only used for bootstrapping the monitor
and server objects are then created dynamically according to what is
found in the cluster.
This commit is contained in:
Johan Wikman
2019-01-09 14:13:46 +02:00
parent f7d97825fb
commit 880842e55d
3 changed files with 308 additions and 45 deletions
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26
server/modules/monitor/clustrixmon/clustrixmonitor.hh
View File

@ -15,6 +15,7 @@
#include "clustrixmon.hh"
#include <maxscale/monitor.hh>
#include <maxbase/http.hh>
#include "clustrixnodeinfo.hh"
class ClustrixMonitor : public maxscale::MonitorInstance
{
@ -43,6 +44,8 @@ public:
long m_cluster_monitor_interval;
};
~ClustrixMonitor();
static ClustrixMonitor* create(MXS_MONITOR* pMonitor);
bool configure(const MXS_CONFIG_PARAMETER* pParams) override;
@ -51,15 +54,30 @@ private:
ClustrixMonitor(MXS_MONITOR* pMonitor);
void pre_loop() override;
void post_loop() override;
void tick();
void fetch_cluster_nodes();
void fetch_cluster_nodes_from(MXS_MONITORED_SERVER& ms);
void refresh_cluster_nodes();
void make_health_check();
void initiate_delayed_http_check();
bool check_http(Call::action_t action);
static long now()
{
return mxb::WorkerLoad::get_time_ms();
}
private:
Config m_config;
mxb::http::Async m_http;
std::vector<std::string> m_health_urls;
uint32_t m_delayed_http_check_id;
Config m_config;
std::vector<std::string> m_config_servers;
std::vector<ClustrixNodeInfo> m_node_infos;
std::vector<std::string> m_health_urls;
mxb::http::Async m_http;
uint32_t m_delayed_http_check_id { 0 };
long m_last_cluster_check { 0 };
MXS_MONITORED_SERVER* m_pMonitored_server { nullptr };
};