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switchover: check for pending archive files on the demotion candidate

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If the current primary (demotion candidate) still has any files to archive,
it will delay the shutdown until all files are archived. If there is a
substantial number of files, and/or the archive command executes slowly,
this will probably lead to an unwelcome delay in the switchover process.
This commit is contained in:
Ian Barwick
2017-08-08 00:37:20 +09:00
parent 068ecc963d
commit 2499b42ef8
12 changed files with 543 additions and 67 deletions
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94
repmgr-action-node.c
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@@ -12,6 +12,7 @@
#include "repmgr.h"
#include "controldata.h"
#include "dirutil.h"
#include "dbutils.h"
#include "repmgr-client-global.h"
#include "repmgr-action-node.h"
@@ -208,17 +209,17 @@ do_node_status(void)
key_value_list_set(
&node_status,
"Last received LSN",
"");
"(none)");
key_value_list_set(
&node_status,
"Last replayed LSN",
"");
"(none)");
}
initPQExpBuffer(&output);
if (runtime_options.csv == true)
if (runtime_options.output_mode == OM_CSV)
{
/* output header */
appendPQExpBuffer(
@@ -379,8 +380,92 @@ void _do_node_status_is_shutdown(void)
void
do_node_check(void)
{
PGconn *conn;
if (strlen(config_file_options.conninfo))
conn = establish_db_connection(config_file_options.conninfo, true);
else
conn = establish_db_connection_by_params(&source_conninfo, true);
/* handle specific checks
* ====================== */
if (runtime_options.archiver == true)
{
(void) do_node_check_archiver(conn, runtime_options.output_mode, NULL);
PQfinish(conn);
return;
}
}
bool
do_node_check_archiver(PGconn *conn, OutputMode mode, PQExpBufferData *output)
{
bool own_buffer = false;
int ready_archive_files = 0;
PQExpBufferData buf;
bool check_ok = true;
if (output == NULL)
{
initPQExpBuffer(&buf);
output = &buf;
own_buffer = true;
}
ready_archive_files = get_ready_archive_files(conn, config_file_options.data_directory);
if (ready_archive_files > config_file_options.archiver_lag_critical)
{
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=CRITICAL --files=%i --threshold=%i",
ready_archive_files,
config_file_options.archiver_lag_critical);
break;
default:
break;
}
}
else if (ready_archive_files > config_file_options.archiver_lag_warning)
{
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=WARNING --files=%i --threshold=%i",
ready_archive_files,
config_file_options.archiver_lag_warning);
break;
default:
break;
}
}
else
{
switch (mode)
{
case OM_OPTFORMAT:
appendPQExpBuffer(
output,
"--status=OK --files=%i",
ready_archive_files);
break;
default:
break;
}
}
if (own_buffer == true)
{
printf("%s\n", buf.data);
termPQExpBuffer(&buf);
}
return check_ok;
}
// --action=...
// --check
@@ -723,7 +808,8 @@ do_node_restore_config(void)
exit(ERR_BAD_CONFIG);
}
while ((arcdir_ent = readdir(arcdir)) != NULL) {
while ((arcdir_ent = readdir(arcdir)) != NULL)
{
struct stat statbuf;
char src_file_path[MAXPGPATH];
char dest_file_path[MAXPGPATH];