# Set umask so test directories and files are created with default permissions
umask(0077);
my $primary = PostgreSQL::Test::Cluster->new('primary');
$primary->init(allows_streaming => 1, extra => ['--wal-segsize=1']);
$primary->start;
my $stream_dir = $primary->basedir . '/archive_wal';
mkdir($stream_dir);
# Sanity checks for command line options.
$primary->command_fails(['pg_receivewal'], 'pg_receivewal needs target directory specified');
$primary->command_fails(
[ 'pg_receivewal', '--directory' => $stream_dir, '--create-slot', '--drop-slot',
], 'failure if both --create-slot and --drop-slot specified');
$primary->command_fails(
[ 'pg_receivewal', '--directory' => $stream_dir, '--create-slot' ], 'failure if --create-slot specified without --slot');
$primary->command_fails(
[ 'pg_receivewal', '--directory' => $stream_dir, '--synchronous', '--no-sync',
], 'failure if --synchronous specified with --no-sync');
$primary->command_fails_like(
[ 'pg_receivewal', '--directory' => $stream_dir, '--compress' => 'none:1',
],
qr/\Qpg_receivewal: error: invalid compression specification: compression algorithm "none" does not accept a compression level/, 'failure if --compress none:N (where N > 0)');
# Slot creation and drop
my $slot_name = 'test';
$primary->command_ok(
[ 'pg_receivewal', '--slot' => $slot_name, '--create-slot' ], 'creating a replication slot');
my $slot = $primary->slot($slot_name);
is($slot->{'slot_type'}, 'physical', 'physical replication slot was created');
is($slot->{'restart_lsn'}, '', 'restart LSN of new slot is null');
$primary->command_ok(
[ 'pg_receivewal', '--slot' => $slot_name, '--drop-slot' ], 'dropping a replication slot');
is($primary->slot($slot_name)->{'slot_type'}, '', 'replication slot was removed');
# Generate some WAL. Use --synchronous at the same time to add more # code coverage. Switch to the next segment first so that subsequent # restarts of pg_receivewal will see this segment as full..
$primary->psql('postgres', 'CREATE TABLE test_table(x integer PRIMARY KEY);');
$primary->psql('postgres', 'SELECT pg_switch_wal();');
my $nextlsn =
$primary->safe_psql('postgres', 'SELECT pg_current_wal_insert_lsn();');
chomp($nextlsn);
$primary->psql('postgres', 'INSERT INTO test_table VALUES (1);');
# Stream up to the given position. This is necessary to have a fixed # started point for the next commands done in this test, with or without # compression involved.
$primary->command_ok(
[ 'pg_receivewal', '--directory' => $stream_dir, '--verbose', '--endpos' => $nextlsn, '--synchronous', '--no-loop',
], 'streaming some WAL with --synchronous');
# Verify that one partial file was generated and keep track of it
my @partial_wals = glob "$stream_dir/*\.partial";
is(scalar(@partial_wals), 1, "one partial WAL segment was created");
note "Testing pg_receivewal with compression methods";
# Check ZLIB compression if available.
SKIP:
{
skip "postgres was not built with ZLIB support", 5 if (!check_pg_config("#define HAVE_LIBZ 1"));
# Generate more WAL worth one completed, compressed, segment.
$primary->psql('postgres', 'SELECT pg_switch_wal();');
$nextlsn =
$primary->safe_psql('postgres', 'SELECT pg_current_wal_insert_lsn();');
chomp($nextlsn);
$primary->psql('postgres', 'INSERT INTO test_table VALUES (2);');
# Verify that the stored files are generated with their expected # names.
my @zlib_wals = glob "$stream_dir/*.gz";
is(scalar(@zlib_wals), 1, "one WAL segment compressed with ZLIB was created");
my @zlib_partial_wals = glob "$stream_dir/*.gz.partial";
is(scalar(@zlib_partial_wals), 1, "one partial WAL segment compressed with ZLIB was created");
# Verify that the start streaming position is computed correctly by # comparing it with the partial file generated previously. The name # of the previous partial, now-completed WAL segment is updated, keeping # its base number.
$partial_wals[0] =~ s/\.partial$/.gz/;
is($zlib_wals[0] eq $partial_wals[0], 1, "one partial WAL segment is now completed"); # Update the list of partial wals with the current one.
@partial_wals = @zlib_partial_wals;
# Check the integrity of the completed segment, if gzip is a command # available.
my $gzip = $ENV{GZIP_PROGRAM};
skip "program gzip is not found in your system", 1 if (!defined $gzip
|| $gzip eq '');
my $gzip_is_valid = system_log($gzip, '--test', @zlib_wals);
is($gzip_is_valid, 0, "gzip verified the integrity of compressed WAL segments");
}
# Check LZ4 compression if available
SKIP:
{
skip "postgres was not built with LZ4 support", 5 if (!check_pg_config("#define USE_LZ4 1"));
# Generate more WAL including one completed, compressed segment.
$primary->psql('postgres', 'SELECT pg_switch_wal();');
$nextlsn =
$primary->safe_psql('postgres', 'SELECT pg_current_wal_insert_lsn();');
chomp($nextlsn);
$primary->psql('postgres', 'INSERT INTO test_table VALUES (3);');
# Stream up to the given position.
$primary->command_ok(
[ 'pg_receivewal', '--directory' => $stream_dir, '--verbose', '--endpos' => $nextlsn, '--no-loop', '--compress' => 'lz4'
], 'streaming some WAL using --compress=lz4');
# Verify that the stored files are generated with their expected # names.
my @lz4_wals = glob "$stream_dir/*.lz4";
is(scalar(@lz4_wals), 1, "one WAL segment compressed with LZ4 was created");
my @lz4_partial_wals = glob "$stream_dir/*.lz4.partial";
is(scalar(@lz4_partial_wals), 1, "one partial WAL segment compressed with LZ4 was created");
# Verify that the start streaming position is computed correctly by # comparing it with the partial file generated previously. The name # of the previous partial, now-completed WAL segment is updated, keeping # its base number.
$partial_wals[0] =~ s/(\.gz)?\.partial$/.lz4/;
is($lz4_wals[0] eq $partial_wals[0], 1, "one partial WAL segment is now completed"); # Update the list of partial wals with the current one.
@partial_wals = @lz4_partial_wals;
# Check the integrity of the completed segment, if LZ4 is an available # command.
my $lz4 = $ENV{LZ4};
skip "program lz4 is not found in your system", 1 if (!defined $lz4
|| $lz4 eq '');
my $lz4_is_valid = system_log($lz4, '-t', @lz4_wals);
is($lz4_is_valid, 0, "lz4 verified the integrity of compressed WAL segments");
}
# Verify that the start streaming position is computed and that the value is # correct regardless of whether any compression is available.
$primary->psql('postgres', 'SELECT pg_switch_wal();');
$nextlsn =
$primary->safe_psql('postgres', 'SELECT pg_current_wal_insert_lsn();');
chomp($nextlsn);
$primary->psql('postgres', 'INSERT INTO test_table VALUES (4);');
$primary->command_ok(
[ 'pg_receivewal', '--directory' => $stream_dir, '--verbose', '--endpos' => $nextlsn, '--no-loop'
], "streaming some WAL");
$partial_wals[0] =~ s/(\.gz|\.lz4)?.partial//;
ok(-e $partial_wals[0], "check that previously partial WAL is now complete");
# Permissions on WAL files should be default
SKIP:
{
skip "unix-style permissions not supported on Windows", 1 if ($windows_os);
ok(check_mode_recursive($stream_dir, 0700, 0600), "check stream dir permissions");
}
note "Testing pg_receivewal with slot as starting streaming point";
# When using a replication slot, archiving should be resumed from the slot's # restart LSN. Use a new archive location and new slot for this test.
my $slot_dir = $primary->basedir . '/slot_wal';
mkdir($slot_dir);
$slot_name = 'archive_slot';
# Setup the slot, reserving WAL at creation (corresponding to the # last redo LSN here, actually, so use a checkpoint to reduce the # number of segments archived).
$primary->psql('postgres', 'checkpoint;');
$primary->psql('postgres', "SELECT pg_create_physical_replication_slot('$slot_name', true);");
# Get the segment name associated with the slot's restart LSN, that should # be archived.
my $walfile_streamed = $primary->safe_psql( 'postgres', "SELECT pg_walfile_name(restart_lsn)
FROM pg_replication_slots
WHERE slot_name = '$slot_name';");
# Switch to a new segment, to make sure that the segment retained by the # slot is still streamed. This may not be necessary, but play it safe.
$primary->psql('postgres', 'INSERT INTO test_table VALUES (5);');
$primary->psql('postgres', 'SELECT pg_switch_wal();');
$nextlsn =
$primary->safe_psql('postgres', 'SELECT pg_current_wal_insert_lsn();');
chomp($nextlsn);
# Add a bit more data to accelerate the end of the next pg_receivewal # commands.
$primary->psql('postgres', 'INSERT INTO test_table VALUES (6);');
# Check case where the slot does not exist.
$primary->command_fails_like(
[ 'pg_receivewal', '--directory' => $slot_dir, '--slot' => 'nonexistentslot', '--no-loop', '--no-sync', '--verbose', '--endpos' => $nextlsn
],
qr/pg_receivewal: error: replication slot "nonexistentslot" does not exist/, 'pg_receivewal fails with non-existing slot');
$primary->command_ok(
[ 'pg_receivewal', '--directory' => $slot_dir, '--slot' => $slot_name, '--no-loop', '--no-sync', '--verbose', '--endpos' => $nextlsn
], "WAL streamed from the slot's restart_lsn");
ok(-e "$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); # 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 (7);');
$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 (8);');
# 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', '--directory' => $timeline_dir, '--verbose', '--endpos' => $nextlsn, '--slot' => $archive_slot, '--no-sync', '--no-loop'
], "Stream some wal after promoting, resuming from the slot's position");
ok(-e "$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");
done_testing();
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