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MXS-1845 Rewrite server promotion code

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In progress, does not yet overwrite existing code.

The new promotion mechanism automatically retries queries which timed out. It also
handles multimaster situations correctly.
This commit is contained in:
Esa Korhonen
2018-09-14 15:32:31 +03:00
parent c58041d4fb
commit dd9ff27743
7 changed files with 331 additions and 23 deletions
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3
server/modules/monitor/mariadbmon/mariadbmon_common.hh
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@ -94,11 +94,14 @@ public:
MariaDBServer* const demotion_target; // Which server will be demoted
const bool demotion_target_is_master; // Was the demotion target the master?
const bool handle_events; // Should scheduled server events be disabled/enabled?
const std::string promotion_sql_file; // SQL commands ran on a server promoted to master
const std::string demotion_sql_file; // SQL commands ran on a server demoted from master
json_t** const error_out; // Json error output
maxbase::Duration time_remaining; // How much time remains to complete the operation
ClusterOperation(OperationType type,
MariaDBServer* promotion_target, MariaDBServer* demotion_target,
bool demo_target_is_master, bool handle_events,
std::string& promotion_sql_file, std::string& demotion_sql_file,
json_t** error, maxbase::Duration time_remaining);
};