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Initial implementation of "standby promote"

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This commit is contained in:
Ian Barwick
2017-05-10 09:24:51 +09:00
parent c61d16def6
commit 51da33a260
4 changed files with 239 additions and 8 deletions
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71
dbutils.c
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@@ -81,7 +81,7 @@ _establish_db_connection(const char *conninfo, const bool exit_on_error, const b
if (exit_on_error)
{
PQfinish(conn);
exit(ERR_DB_CON);
exit(ERR_DB_CONN);
}
}
@@ -96,7 +96,7 @@ _establish_db_connection(const char *conninfo, const bool exit_on_error, const b
if (exit_on_error)
{
PQfinish(conn);
exit(ERR_DB_CON);
exit(ERR_DB_CONN);
}
}
@@ -172,7 +172,7 @@ establish_db_connection_by_params(const char *keywords[], const char *values[],
if (exit_on_error)
{
PQfinish(conn);
exit(ERR_DB_CON);
exit(ERR_DB_CONN);
}
}
else
@@ -193,7 +193,7 @@ establish_db_connection_by_params(const char *keywords[], const char *values[],
if (exit_on_error)
{
PQfinish(conn);
exit(ERR_DB_CON);
exit(ERR_DB_CONN);
}
}
}
@@ -1360,6 +1360,69 @@ _create_update_node_record(PGconn *conn, char *action, t_node_info *node_info)
return true;
}
bool
update_node_record_set_master(PGconn *conn, int this_node_id)
{
PQExpBufferData query;
PGresult *res;
log_debug(_("setting node %i as master and marking existing master as failed"),
this_node_id);
begin_transaction(conn);
initPQExpBuffer(&query);
appendPQExpBuffer(&query,
" UPDATE repmgr.repl_nodes "
" SET active = FALSE "
" WHERE type = 'master' "
" AND active IS TRUE ");
res = PQexec(conn, query.data);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_error(_("unable to set old master node as inactive:\n %s"),
PQerrorMessage(conn));
PQclear(res);
rollback_transaction(conn);
return false;
}
PQclear(res);
termPQExpBuffer(&query);
initPQExpBuffer(&query);
appendPQExpBuffer(&query,
" UPDATE repmgr.nodes"
" SET type = 'master', "
" upstream_node_id = NULL "
" WHERE node_id = %i ",
this_node_id);
res = PQexec(conn, query.data);
termPQExpBuffer(&query);
if (PQresultStatus(res) != PGRES_COMMAND_OK)
{
log_error(_("unable to set current node %i as active master:\n %s"),
this_node_id,
PQerrorMessage(conn));
PQclear(res);
rollback_transaction(conn);
return false;
}
PQclear(res);
return commit_transaction(conn);
}
bool
delete_node_record(PGconn *conn, int node)