int
remove_gtmSlave(bool clean_opt)
{
FILE *f;
/* Check if gtm_slave is configured */
if (!isVarYes(VAR_gtmSlave) || !sval(VAR_gtmSlaveServer) || is_none(sval(VAR_gtmSlaveServer)))
{
elog(ERROR, "ERROR: GTM slave is not configured.\n");
return 1;
}
/* Check if gtm_slave is not running */
if (!do_gtm_ping(sval(VAR_gtmSlaveServer), atoi(sval(VAR_gtmSlavePort))))
{
elog(ERROR, "ERROR: GTM slave is now running. Cannot remove it.\n");
return 1;
}
elog(NOTICE, "Removing gtm slave.\n");
/* Clean */
if (clean_opt)
clean_gtm_slave();
/* Reconfigure */
reset_var(VAR_gtmSlave);
assign_sval(VAR_gtmSlave, Strdup("n"));
reset_var(VAR_gtmSlaveServer);
assign_sval(VAR_gtmSlaveServer, Strdup("none"));
reset_var(VAR_gtmSlavePort);
assign_sval(VAR_gtmSlavePort, Strdup("-1"));
reset_var(VAR_gtmSlaveDir);
assign_sval(VAR_gtmSlaveDir, Strdup("none"));
/* Write the configuration file and bakup it */
if ((f = fopen(pgxc_ctl_config_path, "a")) == NULL)
{
/* Should it be panic? */
elog(ERROR, "ERROR: cannot open configuration file \"%s\", %s\n", pgxc_ctl_config_path, strerror(errno));
return 1;
}
fprintf(f,
"#===================================================\n"
"# pgxc configuration file updated due to GTM slave removal\n"
"# %s\n",
timeStampString(date, MAXTOKEN+1));
fprintSval(f, VAR_gtmSlave);
fprintSval(f, VAR_gtmSlaveServer);
fprintSval(f, VAR_gtmSlavePort);
fprintSval(f, VAR_gtmSlaveDir);
fprintf(f, "%s", "#----End of reconfiguration -------------------------\n");
fclose(f);
backup_configuration();
elog(NOTICE, "Done.\n");
return 0;
}
int
main(int ac, char *av[])
{
int opt;
nodetype_t nodetype = NONE;
char *port = NULL;
char *host = NULL;
char *nodename = NULL;
bool verbose = false;
char *username = NULL;
char *database = NULL;
progname = strdup(av[0]);
/* Print help if necessary */
if (ac > 1)
{
if (strcmp(av[1], "--help") == 0 || strcmp(av[1], "-?") == 0)
{
usage();
exit(0);
}
}
/* Scan options */
while ((opt = getopt(ac, av, "Z:U:d:h:n:p:qv")) != -1)
{
switch(opt)
{
case 'Z':
if (strcmp(optarg, "gtm") == 0)
nodetype = GTM;
else if (strcmp(optarg, "node") == 0)
nodetype = NODE;
else
{
fprintf(stderr, "%s: invalid -Z option value.\n", progname);
exit(3);
}
break;
case 'h':
Free(host);
host = strdup(optarg);
break;
case 'n':
Free(nodename);
nodename = strdup(optarg);
break;
case 'p':
Free(port);
port = strdup(optarg);
break;
case 'q':
verbose = false;
break;
case 'v':
verbose = true;
break;
case 'U':
username = strdup(optarg);
break;
case 'd':
database = strdup(optarg);
break;
default:
fprintf(stderr, "%s: unknow option %c.\n", progname, opt);
exit(3);
}
}
/* If no types are defined, well there is nothing to be done */
if (nodetype == NONE)
{
fprintf(stderr, "%s: -Z option is missing, it is mandatory.\n", progname);
usage();
exit(3);
}
switch(nodetype)
{
case GTM:
exit(do_gtm_ping(host, port, nodetype, nodename, verbose));
case NODE:
exit(do_node_ping(host, port, username, database, verbose));
case NONE:
default:
break;
}
/* Should not happen */
fprintf(stderr, "%s: internal error.\n", progname);
exit(3);
}
/*
* Failover the gtm ------------------------------------------------------
*/
int
failover_gtm(void)
{
char date[MAXTOKEN+1];
char *stdIn;
int rc;
FILE *f;
elog(INFO, "Failover gtm\n");
if (!isVarYes(VAR_gtmSlave) || (sval(VAR_gtmSlaveServer) == NULL) || is_none(sval(VAR_gtmSlaveServer)))
{
elog(ERROR, "ERROR: GTM slave is not configured. Cannot failover.\n");
return(1);
}
if (do_gtm_ping(sval(VAR_gtmSlaveServer), atoi(sval(VAR_gtmSlavePort))) != 0)
{
elog(ERROR, "ERROR: GTM slave is not running\n");
return(1);
}
/* Promote the slave */
elog(NOTICE, "Running \"gtm_ctl promote -Z gtm -D %s\"\n", sval(VAR_gtmSlaveDir));
rc = doImmediate(sval(VAR_gtmSlaveServer), NULL,
"gtm_ctl promote -Z gtm -D %s", sval(VAR_gtmSlaveDir));
if (WEXITSTATUS(rc) != 0)
{
elog(ERROR, "ERROR: could not promote gtm (host:%s, dir:%s)\n", sval(VAR_gtmSlaveServer), sval(VAR_gtmSlaveDir));
return 1;
}
/* Configure promoted gtm */
if ((f = prepareLocalStdin(newFilename(stdIn), MAXPATH, NULL)) == NULL)
return(1);
fprintf(f,
"#===================================================\n"
"# Updated due to GTM failover\n"
"# %s\n"
"startup = ACT\n"
"#----End of reconfiguration -------------------------\n",
timeStampString(date, MAXTOKEN+1));
fclose(f);
elog(NOTICE, "Updating gtm.conf at %s:%s\n", sval(VAR_gtmSlaveServer), sval(VAR_gtmSlaveDir));
rc = doImmediate(sval(VAR_gtmSlaveServer), stdIn, "cat >> %s/gtm.conf", sval(VAR_gtmSlaveDir));
if (WEXITSTATUS(rc) != 0)
{
elog(ERROR, "ERROR: could not update gtm.conf (host: %s, dir:%s)\n", sval(VAR_gtmSlaveServer), sval(VAR_gtmSlaveDir));
return 1;
}
/* Update and backup configuration file */
if ((f = prepareLocalStdin(stdIn, MAXPATH, NULL)) == NULL)
return(1);
fprintf(f,
"#===================================================\n"
"# pgxc configuration file updated due to GTM failover\n"
"# %s\n"
"gtmMasterServer=%s\n"
"gtmMasterPort=%s\n"
"gtmMasterDir=%s\n"
"gtmSlave=n\n"
"gtmSlaveServer=none\n"
"gtmSlavePort=0\n"
"gtmSlaveDir=none\n"
"#----End of reconfiguration -------------------------\n",
timeStampString(date, MAXTOKEN+1),
sval(VAR_gtmSlaveServer),
sval(VAR_gtmSlavePort),
sval(VAR_gtmSlaveDir));
fclose(f);
rc = doImmediate(NULL, stdIn, "cat >> %s", pgxc_ctl_config_path);
if (WEXITSTATUS(rc) != 0)
{
elog(ERROR, "ERROR: could not update gtm.conf (host: %s, dir:%s)\n", sval(VAR_gtmSlaveServer), sval(VAR_gtmSlaveDir));
return 1;
}
freeAndReset(stdIn);
backup_configuration();
/* Reconfigure myself */
assign_val(VAR_gtmMasterServer, VAR_gtmSlaveServer); reset_var(VAR_gtmSlaveServer);
assign_val(VAR_gtmMasterPort, VAR_gtmSlavePort); reset_var(VAR_gtmSlavePort);
assign_val(VAR_gtmMasterDir, VAR_gtmSlaveDir); reset_var(VAR_gtmSlaveDir);
assign_sval(VAR_gtmSlaveServer, "none");
assign_sval(VAR_gtmSlavePort, "0");
assign_sval(VAR_gtmSlaveDir, "none");
assign_sval(VAR_gtmSlave, "n");
return 0;
}
