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Add TAP test for pg_receivewal with timeline switch 

pg_receivewal is able to follow a timeline switch, but this was not
tested.  This test uses an empty archive location with a restart done
from a slot, making its implementation a tad simpler than if we would
reuse an existing archive directory.

Author: Ronan Dunklau
Reviewed-by: Kyotaro Horiguchi, Michael Paquier
Discussion: https://postgr.es/m/18708360.4lzOvYHigE@aivenronan
This commit is contained in:
Michael Paquier 2021-11-01 13:16:04 +09:00
parent add5cf28d4
commit 0f9b9938a0
1 changed files with 61 additions and 1 deletions
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62
src/bin/pg_basebackup/t/020_pg_receivewal.pl
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@ -5,7 +5,7 @@ use strict;
use warnings;
use PostgreSQL::Test::Utils;
use PostgreSQL::Test::Cluster;
use Test::More tests => 31;
use Test::More tests => 35;
program_help_ok('pg_receivewal');
program_version_ok('pg_receivewal');
@ -208,3 +208,63 @@ $primary->command_ok(
"WAL streamed from the slot's restart_lsn");
ok(-e "$slot_dir/$walfile_streamed",
"WAL from the slot's restart_lsn has been archived");
# Test timeline switch using a replication slot, requiring a promoted
# standby.
my $backup_name = "basebackup";
$primary->backup($backup_name);
my $standby = PostgreSQL::Test::Cluster->new("standby");
$standby->init_from_backup($primary, $backup_name, has_streaming => 1);
$standby->start;
# Create a replication slot on this new standby
my $archive_slot = "archive_slot";
$standby->psql(
'',
"CREATE_REPLICATION_SLOT $archive_slot PHYSICAL (RESERVE_WAL)",
replication => 1);
# Wait for standby catchup
$primary->wait_for_catchup($standby, 'replay', $primary->lsn('write'));
# Get a walfilename from before the promotion to make sure it is archived
# after promotion
my $standby_slot = $standby->slot($archive_slot);
my $replication_slot_lsn = $standby_slot->{'restart_lsn'};
# pg_walfile_name() is not supported while in recovery, so use the primary
# to build the segment name. Both nodes are on the same timeline, so this
# produces a segment name with the timeline we are switching from.
my $walfile_before_promotion =
$primary->safe_psql('postgres',
"SELECT pg_walfile_name('$replication_slot_lsn');");
# Everything is setup, promote the standby to trigger a timeline switch.
$standby->promote;
# Force a segment switch to make sure at least one full WAL is archived
# on the new timeline.
my $walfile_after_promotion = $standby->safe_psql('postgres',
"SELECT pg_walfile_name(pg_current_wal_insert_lsn());");
$standby->psql('postgres', 'INSERT INTO test_table VALUES (6);');
$standby->psql('postgres', 'SELECT pg_switch_wal();');
$nextlsn =
$standby->safe_psql('postgres', 'SELECT pg_current_wal_insert_lsn();');
chomp($nextlsn);
# This speeds up the operation.
$standby->psql('postgres', 'INSERT INTO test_table VALUES (7);');
# Now try to resume from the slot after the promotion.
my $timeline_dir = $primary->basedir . '/timeline_wal';
mkdir($timeline_dir);
$standby->command_ok(
[
'pg_receivewal', '-D', $timeline_dir, '--verbose',
'--endpos', $nextlsn, '--slot', $archive_slot,
'--no-sync', '-n'
],
"Stream some wal after promoting, resuming from the slot's position");
ok(-e "$timeline_dir/$walfile_before_promotion",
"WAL segment $walfile_before_promotion archived after timeline jump");
ok(-e "$timeline_dir/$walfile_after_promotion",
"WAL segment $walfile_after_promotion archived after timeline jump");
ok(-e "$timeline_dir/00000002.history",
"timeline history file archived after timeline jump");