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https://github.com/EnterpriseDB/repmgr.git
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112ca6321a
The repmgr3 implementation required the promotion candidate (standby) to directly work with the demotion candidate's data directory, directly execute server control commands etc. Here we delegated a lot more of that work to the repmgr on the demotion candidate, which reduces the amount of back-and-forth over SSH and generally makes things cleaner and smoother. In particular the repmgr on the demotion candidate will carry out a thorough check that the node is shut down and report the last checkpoint LSN to the promotion candidate; this can then be used to determine whether pg_rewind needs to be executed on the demoted primary before reintegrating it back into the cluster (todo). Also implement "--dry-run" for this action, which will sanity-check the nodes as far as possible without executing the switchover. Additionally some of the new repmgr node commands (or command options) introduced for this can be also executed by the user to obtain additional information about the status of each node.
185 lines
4.4 KiB
C
185 lines
4.4 KiB
C
/*
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* configfile.h
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*
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* Copyright (c) 2ndQuadrant, 2010-2017
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*
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*/
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#ifndef _REPMGR_CONFIGFILE_H_
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#define _REPMGR_CONFIGFILE_H_
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#include <getopt_long.h>
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#define CONFIG_FILE_NAME "repmgr.conf"
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#define MAXLINELENGTH 4096
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extern bool config_file_found;
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typedef enum {
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FAILOVER_MANUAL,
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FAILOVER_AUTOMATIC
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} failover_mode_opt;
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typedef struct EventNotificationListCell
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{
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struct EventNotificationListCell *next;
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char event_type[MAXLEN];
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} EventNotificationListCell;
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typedef struct EventNotificationList
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{
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EventNotificationListCell *head;
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EventNotificationListCell *tail;
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} EventNotificationList;
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typedef struct TablespaceListCell
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{
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struct TablespaceListCell *next;
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char old_dir[MAXPGPATH];
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char new_dir[MAXPGPATH];
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} TablespaceListCell;
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typedef struct TablespaceList
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{
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TablespaceListCell *head;
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TablespaceListCell *tail;
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} TablespaceList;
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typedef struct
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{
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/* node information */
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int node_id;
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char node_name[MAXLEN];
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char conninfo[MAXLEN];
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char replication_user[NAMEDATALEN];
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char data_directory[MAXPGPATH];
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char pg_bindir[MAXPGPATH];
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int replication_type;
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/* log settings */
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char log_level[MAXLEN];
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char log_facility[MAXLEN];
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char log_file[MAXLEN];
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int log_status_interval;
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/* standby clone settings */
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bool use_replication_slots;
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char rsync_options[MAXLEN];
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char ssh_options[MAXLEN];
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char pg_basebackup_options[MAXLEN];
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char restore_command[MAXLEN];
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TablespaceList tablespace_mapping;
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/* repmgrd settings */
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failover_mode_opt failover_mode;
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char location[MAXLEN];
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int priority;
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char promote_command[MAXLEN];
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char follow_command[MAXLEN];
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int monitor_interval_secs;
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int reconnect_attempts;
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int reconnect_interval;
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bool monitoring_history;
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int degraded_monitoring_timeout;
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int async_query_timeout;
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int primary_notification_timeout;
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int primary_follow_timeout;
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/* BDR settings */
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bool bdr_local_monitoring_only;
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bool bdr_recovery_timeout;
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/* service settings */
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char pg_ctl_options[MAXLEN];
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char service_stop_command[MAXLEN];
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char service_start_command[MAXLEN];
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char service_restart_command[MAXLEN];
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char service_reload_command[MAXLEN];
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char service_promote_command[MAXLEN];
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/* event notification settings */
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char event_notification_command[MAXLEN];
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EventNotificationList event_notifications;
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/* barman settings */
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char barman_host[MAXLEN];
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char barman_server[MAXLEN];
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char barman_config[MAXLEN];
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/* undocumented test settings */
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int promote_delay;
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} t_configuration_options;
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/*
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* The following will initialize the structure with a minimal set of options;
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* actual defaults are set in parse_config() before parsing the configuration file
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*/
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#define T_CONFIGURATION_OPTIONS_INITIALIZER { \
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/* node information */ \
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UNKNOWN_NODE_ID, "", "", "", "", "", REPLICATION_TYPE_PHYSICAL, \
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/* log settings */ \
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"", "", "", DEFAULT_LOG_STATUS_INTERVAL, \
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/* standby clone settings */ \
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false, "", "", "", "", { NULL, NULL }, \
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/* repmgrd settings */ \
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FAILOVER_MANUAL, DEFAULT_LOCATION, DEFAULT_PRIORITY, "", "", \
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DEFAULT_MONITORING_INTERVAL, \
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DEFAULT_RECONNECTION_ATTEMPTS, \
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DEFAULT_RECONNECTION_INTERVAL, \
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false, -1, \
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DEFAULT_ASYNC_QUERY_TIMEOUT, \
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DEFAULT_PRIMARY_NOTIFICATION_TIMEOUT, \
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DEFAULT_PRIMARY_FOLLOW_TIMEOUT, \
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/* BDR settings */ \
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false, DEFAULT_BDR_RECOVERY_TIMEOUT, \
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/* service settings */ \
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"", "", "", "", "", "", \
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/* event notification settings */ \
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"", { NULL, NULL }, \
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/* barman settings */ \
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"", "", "", \
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/* undocumented test settings */ \
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0 \
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}
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typedef struct
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{
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char slot[MAXLEN];
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char xlog_method[MAXLEN];
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bool no_slot; /* from PostgreSQL 10 */
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} t_basebackup_options;
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#define T_BASEBACKUP_OPTIONS_INITIALIZER { "", "", false }
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void set_progname(const char *argv0);
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const char *progname(void);
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void load_config(const char *config_file, bool verbose, bool terse, t_configuration_options *options, char *argv0);
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void parse_config(t_configuration_options *options, bool terse);
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bool reload_config(t_configuration_options *orig_options);
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int repmgr_atoi(const char *s,
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const char *config_item,
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ItemList *error_list,
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int minval);
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bool parse_pg_basebackup_options(const char *pg_basebackup_options,
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t_basebackup_options *backup_options,
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int server_version_num,
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ItemList *error_list);
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/* called by repmgr-client and repmgrd */
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void exit_with_cli_errors(ItemList *error_list);
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void print_item_list(ItemList *item_list);
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#endif /* _REPMGR_CONFIGFILE_H_ */
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