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Don't redirect duplicate connections

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The redirection method checks if a slave connection to the redirection
target already exists. If so, the connection is not modified. Also, failover
better detects duplicate connections during promotion.
This commit is contained in:
Esa Korhonen
2018-10-11 18:44:30 +03:00
parent e930270b9c
commit 0c203fa02d
3 changed files with 130 additions and 53 deletions
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13
server/modules/monitor/mariadbmon/mariadbmon.hh
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@ -284,17 +284,16 @@ private:
json_t** error_out);
ServerArray get_redirectables(const MariaDBServer* old_master, const MariaDBServer* ignored_slave);
int redirect_slaves(MariaDBServer* new_master, const ServerArray& slaves,
ServerArray* redirected_slaves);
int redirect_slaves_ex(ClusterOperation& op, const ServerArray& slaves,
const MariaDBServer* old_master, const MariaDBServer* new_master,
ServerArray* redirected_slaves);
int redirect_slaves(MariaDBServer* new_master, const ServerArray& slaves,
ServerArray* redirected_slaves);
int redirect_slaves_ex(ClusterOperation& op,
ServerArray* redirected_to_promo, ServerArray* redirected_to_demo);
bool start_external_replication(MariaDBServer* new_master, json_t** err_out);
std::string generate_change_master_cmd(const std::string& master_host, int master_port);
void wait_cluster_stabilization(ClusterOperation& op, const ServerArray& slaves,
const MariaDBServer* new_master);
void report_and_disable(const std::string& operation, const std::string& setting_name,
bool* setting_var);
void report_and_disable(const std::string& operation, const std::string& setting_name,
bool* setting_var);
// Rejoin methods
bool cluster_can_be_joined();