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In pg_upgrade, use the new postmaster -C option to get the real data

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directory, for config-only directory installs.  Only works for PG 9.2+
servers.
This commit is contained in:
Bruce Momjian 2011-10-07 14:40:23 -04:00
parent a3996754cc
commit caa1054df8
4 changed files with 70 additions and 5 deletions
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60
contrib/pg_upgrade/option.c
View File

@ -112,10 +112,12 @@ parseCommandLine(int argc, char *argv[])
case 'd':
old_cluster.pgdata = pg_strdup(optarg);
old_cluster.pgconfig = pg_strdup(optarg);
break;
case 'D':
new_cluster.pgdata = pg_strdup(optarg);
new_cluster.pgconfig = pg_strdup(optarg);
break;
case 'g':
@ -319,3 +321,61 @@ check_required_directory(char **dirpath, char *envVarName,
#endif
(*dirpath)[strlen(*dirpath) - 1] = 0;
}
/*
* adjust_data_dir
*
* If a configuration-only directory was specified, find the real data dir
* by quering the running server. This has limited checking because we
* can't check for a running server because we can't find postmaster.pid.
*/
void
adjust_data_dir(ClusterInfo *cluster)
{
char filename[MAXPGPATH];
char cmd[MAXPGPATH], cmd_output[MAX_STRING];
FILE *fd, *output;
/* If there is no postgresql.conf, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/postgresql.conf", cluster->pgconfig);
if ((fd = fopen(filename, "r")) == NULL)
return;
fclose(fd);
/* If PG_VERSION exists, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/PG_VERSION", cluster->pgconfig);
if ((fd = fopen(filename, "r")) != NULL)
{
fclose(fd);
return;
}
/* Must be a configuration directory, so find the real data directory. */
prep_status("Finding the real data directory for the %s cluster",
CLUSTER_NAME(cluster));
/*
* We don't have a data directory yet, so we can't check the PG
* version, so this might fail --- only works for PG 9.2+. If this
* fails, pg_upgrade will fail anyway because the data files will not
* be found.
*/
snprintf(cmd, sizeof(cmd), "\"%s/postmaster\" -D \"%s\" -C data_directory",
cluster->bindir, cluster->pgconfig);
if ((output = popen(cmd, "r")) == NULL ||
fgets(cmd_output, sizeof(cmd_output), output) == NULL)
pg_log(PG_FATAL, "Could not get data directory using %s: %s\n",
cmd, getErrorText(errno));
pclose(output);
/* Remove trailing newline */
if (strchr(cmd_output, '\n') != NULL)
*strchr(cmd_output, '\n') = '\0';
cluster->pgdata = pg_strdup(cmd_output);
check_ok();
}

3
contrib/pg_upgrade/pg_upgrade.c
View File

@ -68,6 +68,9 @@ main(int argc, char **argv)
parseCommandLine(argc, argv);
adjust_data_dir(&old_cluster);
adjust_data_dir(&new_cluster);
output_check_banner(&live_check);
setup(argv[0], live_check);

2
contrib/pg_upgrade/pg_upgrade.h
View File

@ -187,6 +187,7 @@ typedef struct
ControlData controldata; /* pg_control information */
DbInfoArr dbarr; /* dbinfos array */
char *pgdata; /* pathname for cluster's $PGDATA directory */
char *pgconfig; /* pathname for cluster's config file directory */
char *bindir; /* pathname for cluster's executable directory */
unsigned short port; /* port number where postmaster is waiting */
uint32 major_version; /* PG_VERSION of cluster */
@ -361,6 +362,7 @@ void print_maps(FileNameMap *maps, int n,
/* option.c */
void parseCommandLine(int argc, char *argv[]);
void adjust_data_dir(ClusterInfo *cluster);
/* relfilenode.c */

10
contrib/pg_upgrade/server.c
View File

@ -169,7 +169,7 @@ start_postmaster(ClusterInfo *cluster)
snprintf(cmd, sizeof(cmd),
SYSTEMQUOTE "\"%s/pg_ctl\" -w -l \"%s\" -D \"%s\" "
"-o \"-p %d %s\" start >> \"%s\" 2>&1" SYSTEMQUOTE,
cluster->bindir, log_opts.filename2, cluster->pgdata, cluster->port,
cluster->bindir, log_opts.filename2, cluster->pgconfig, cluster->port,
(cluster->controldata.cat_ver >=
BINARY_UPGRADE_SERVER_FLAG_CAT_VER) ? "-b" :
"-c autovacuum=off -c autovacuum_freeze_max_age=2000000000",
@ -208,17 +208,17 @@ stop_postmaster(bool fast)
{
char cmd[MAXPGPATH];
const char *bindir;
const char *datadir;
const char *configdir;
if (os_info.running_cluster == &old_cluster)
{
bindir = old_cluster.bindir;
datadir = old_cluster.pgdata;
configdir = old_cluster.pgconfig;
}
else if (os_info.running_cluster == &new_cluster)
{
bindir = new_cluster.bindir;
datadir = new_cluster.pgdata;
configdir = new_cluster.pgconfig;
}
else
return; /* no cluster running */
@ -226,7 +226,7 @@ stop_postmaster(bool fast)
snprintf(cmd, sizeof(cmd),
SYSTEMQUOTE "\"%s/pg_ctl\" -w -l \"%s\" -D \"%s\" %s stop >> "
"\"%s\" 2>&1" SYSTEMQUOTE,
bindir, log_opts.filename2, datadir, fast ? "-m fast" : "",
bindir, log_opts.filename2, configdir, fast ? "-m fast" : "",
log_opts.filename2);
exec_prog(fast ? false : true, "%s", cmd);