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Initial database functions

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This commit is contained in:
Ian Barwick
2017-04-21 15:12:33 +09:00
parent 11b7dda778
commit 001d887e8d
9 changed files with 524 additions and 23 deletions
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149
repmgr-client.c
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@@ -26,6 +26,11 @@ t_configuration_options config_file_options = T_CONFIGURATION_OPTIONS_INITIALIZE
ItemList cli_errors = { NULL, NULL };
ItemList cli_warnings = { NULL, NULL };
static bool config_file_required = true;
static char repmgr_slot_name[MAXLEN] = "";
static char *repmgr_slot_name_ptr = NULL;
int
main(int argc, char **argv)
{
@@ -267,10 +272,89 @@ main(int argc, char **argv)
if (runtime_options.terse)
logger_set_terse();
/*
* Node configuration information is not needed for all actions, with
* STANDBY CLONE being the main exception.
*/
if (config_file_required)
{
/*
* if a configuration file was provided, the configuration file parser
* will already have errored out if no valid node_id found
*/
if (config_file_options.node_id == NODE_NOT_FOUND)
{
log_error(_("no node information was found - "
"please supply a configuration file"));
exit(ERR_BAD_CONFIG);
}
}
/*
* Initialise slot name, if required (9.4 and later)
*
* NOTE: the slot name will be defined for each record, including
* the master; the `slot_name` column in `repl_nodes` defines
* the name of the slot, but does not imply a slot has been created.
* The version check for 9.4 or later is done in check_upstream_config()
*/
if (config_file_options.use_replication_slots)
{
maxlen_snprintf(repmgr_slot_name, "repmgr_slot_%i", config_file_options.node_id);
repmgr_slot_name_ptr = repmgr_slot_name;
log_verbose(LOG_DEBUG, "slot name initialised as: %s", repmgr_slot_name);
}
switch (action)
{
case MASTER_REGISTER:
do_master_register();
break;
default:
/* An action will have been determined by this point */
break;
}
return SUCCESS;
}
static void
exit_with_errors(void)
{
fprintf(stderr, _("The following command line errors were encountered:\n"));
print_error_list(&cli_errors, LOG_ERR);
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname());
exit(ERR_BAD_CONFIG);
}
static void
print_error_list(ItemList *error_list, int log_level)
{
ItemListCell *cell;
for (cell = error_list->head; cell; cell = cell->next)
{
fprintf(stderr, " ");
switch(log_level)
{
/* Currently we only need errors and warnings */
case LOG_ERROR:
log_error("%s", cell->string);
break;
case LOG_WARNING:
log_warning("%s", cell->string);
break;
}
}
}
static void
do_help(void)
{
@@ -303,41 +387,66 @@ do_help(void)
printf(_(" --log-to-file log to file (or logging facility) defined in repmgr.conf\n"));
printf(_(" -t, --terse don't display hints and other non-critical output\n"));
printf(_(" -v, --verbose display additional log output (useful for debugging)\n"));
printf(_("\n"));
puts("");
}
static void
exit_with_errors(void)
do_master_register(void)
{
fprintf(stderr, _("The following command line errors were encountered:\n"));
PGconn *conn;
print_error_list(&cli_errors, LOG_ERR);
log_info(_("connecting to master database..."));
fprintf(stderr, _("Try \"%s --help\" for more information.\n"), progname());
// XXX if con fails, have this print offending conninfo!
conn = establish_db_connection(config_file_options.conninfo, true);
exit(ERR_BAD_CONFIG);
check_server_version(conn, "master", true, NULL);
}
static void
print_error_list(ItemList *error_list, int log_level)
/**
* check_server_version()
*
* Verify that the server is MIN_SUPPORTED_VERSION_NUM or later
*
* PGconn *conn:
* the connection to check
*
* char *server_type:
* either "master" or "standby"; used to format error message
*
* bool exit_on_error:
* exit if reported server version is too low; optional to enable some callers
* to perform additional cleanup
*
* char *server_version_string
* passed to get_server_version(), which will place the human-readable
* server version string there (e.g. "9.4.0")
*/
static int
check_server_version(PGconn *conn, char *server_type, bool exit_on_error, char *server_version_string)
{
ItemListCell *cell;
int server_version_num = 0;
for (cell = error_list->head; cell; cell = cell->next)
server_version_num = get_server_version(conn, server_version_string);
if (server_version_num < MIN_SUPPORTED_VERSION_NUM)
{
fprintf(stderr, " ");
switch(log_level)
if (server_version_num > 0)
log_error(_("%s requires %s to be PostgreSQL %s or later"),
progname(),
server_type,
MIN_SUPPORTED_VERSION
);
if (exit_on_error == true)
{
/* Currently we only need errors and warnings */
case LOG_ERROR:
log_error("%s", cell->string);
break;
case LOG_WARNING:
log_warning("%s", cell->string);
break;
PQfinish(conn);
exit(ERR_BAD_CONFIG);
}
return -1;
}
return server_version_num;
}