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"daemon start": initial implementation

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This commit is contained in:
Ian Barwick
2019-01-24 18:42:08 +09:00
committed by Ian Barwick
parent cbfef17a1d
commit 32b81e7d49
11 changed files with 270 additions and 30 deletions
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91
repmgr-client.c
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@@ -35,7 +35,8 @@
* DAEMON STATUS
* DAEMON PAUSE
* DAEMON UNPAUSE
*
* DAEMON START
* DAEMON STOP
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -935,6 +936,10 @@ main(int argc, char **argv)
action = DAEMON_PAUSE;
else if (strcasecmp(repmgr_action, "UNPAUSE") == 0)
action = DAEMON_UNPAUSE;
else if (strcasecmp(repmgr_action, "START") == 0)
action = DAEMON_START;
else if (strcasecmp(repmgr_action, "STOP") == 0)
action = DAEMON_STOP;
}
else
{
@@ -1344,6 +1349,11 @@ main(int argc, char **argv)
case DAEMON_UNPAUSE:
do_daemon_unpause();
break;
case DAEMON_START:
do_daemon_start();
case DAEMON_STOP:
do_daemon_stop();
break;
default:
/* An action will have been determined by this point */
@@ -1834,6 +1844,8 @@ check_cli_parameters(const int action)
case NODE_SERVICE:
case DAEMON_PAUSE:
case DAEMON_UNPAUSE:
case DAEMON_START:
case DAEMON_STOP:
break;
default:
item_list_append_format(&cli_warnings,
@@ -1920,7 +1932,10 @@ action_name(const int action)
return "DAEMON PAUSE";
case DAEMON_UNPAUSE:
return "DAEMON UNPAUSE";
case DAEMON_START:
return "DAEMON START";
case DAEMON_STOP:
return "DAEMON STOP";
}
return "UNKNOWN ACTION";
@@ -2731,6 +2746,34 @@ make_remote_repmgr_path(PQExpBufferData *output_buf, t_node_info *remote_node_re
}
void
make_repmgrd_path(PQExpBufferData *output_buf)
{
if (config_file_options.repmgr_bindir[0] != '\0')
{
int len = strlen(config_file_options.repmgr_bindir);
appendPQExpBufferStr(output_buf,
config_file_options.repmgr_bindir);
/* Add trailing slash */
if (config_file_options.repmgr_bindir[len - 1] != '/')
{
appendPQExpBufferChar(output_buf, '/');
}
}
else if (pg_bindir[0] != '\0')
{
appendPQExpBufferStr(output_buf,
pg_bindir);
}
appendPQExpBuffer(output_buf,
"repmgrd -f %s ",
config_file_path);
}
/* ======================== */
/* server control functions */
/* ======================== */
@@ -3358,3 +3401,47 @@ check_node_can_attach(TimeLineID local_tli, XLogRecPtr local_xlogpos, PGconn *fo
PQfinish(follow_target_repl_conn);
return success;
}
/*
* Simple check to see if "shared_preload_libraries" includes "repmgr".
* Parsing "shared_preload_libraries" is non-trivial, as it's potentially
* a comma-separated list, and worse may not be readable by the repmgr
* user.
*
* Instead, we check if a function which should return a value returns
* NULL; this indicates the shared library is not installed.
*/
void
check_shared_library(PGconn *conn)
{
bool ok = repmgrd_check_local_node_id(conn);
if (ok == true)
return;
log_error(_("repmgrd not configured for this node"));
log_hint(_("ensure \"shared_preload_libraries\" includes \"repmgr\" and restart PostgreSQL"));
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
bool
is_repmgrd_running(PGconn *conn)
{
pid_t pid;
bool is_running = false;
pid = repmgrd_get_pid(conn);
if (pid != UNKNOWN_PID)
{
if (kill(pid, 0) != -1)
{
is_running = true;
}
}
return is_running;
}