TAP test for logical decoding on standby
Author: "Drouvot, Bertrand" <bertranddrouvot.pg@gmail.com> Author: Amit Khandekar <amitdkhan.pg@gmail.com> Author: Craig Ringer <craig@2ndquadrant.com> (in an older version) Author: Andres Freund <andres@anarazel.de> Reviewed-by: "Drouvot, Bertrand" <bertranddrouvot.pg@gmail.com> Reviewed-by: Andres Freund <andres@anarazel.de> Reviewed-by: Robert Haas <robertmhaas@gmail.com> Reviewed-by: Amit Kapila <amit.kapila16@gmail.com> Reviewed-by: Fabrízio de Royes Mello <fabriziomello@gmail.com>
This commit is contained in:
Andres Freund
parent
0fdab27ad6
commit
fcd77d5321
@ -3029,6 +3029,43 @@ $SIG{TERM} = $SIG{INT} = sub {
|
||||
|
||||
=pod
|
||||
|
||||
=item $node->create_logical_slot_on_standby(self, primary, slot_name, dbname)
|
||||
|
||||
Create logical replication slot on given standby
|
||||
|
||||
=cut
|
||||
|
||||
sub create_logical_slot_on_standby
|
||||
{
|
||||
my ($self, $primary, $slot_name, $dbname) = @_;
|
||||
my ($stdout, $stderr);
|
||||
|
||||
my $handle;
|
||||
|
||||
$handle = IPC::Run::start(['pg_recvlogical', '-d', $self->connstr($dbname), '-P', 'test_decoding', '-S', $slot_name, '--create-slot'], '>', \$stdout, '2>', \$stderr);
|
||||
|
||||
# Once the slot's restart_lsn is determined, the standby looks for
|
||||
# xl_running_xacts WAL record from the restart_lsn onwards. First wait
|
||||
# until the slot restart_lsn is determined.
|
||||
|
||||
$self->poll_query_until(
|
||||
'postgres', qq[
|
||||
SELECT restart_lsn IS NOT NULL
|
||||
FROM pg_catalog.pg_replication_slots WHERE slot_name = '$slot_name'
|
||||
]) or die "timed out waiting for logical slot to calculate its restart_lsn";
|
||||
|
||||
# Then arrange for the xl_running_xacts record for which pg_recvlogical is
|
||||
# waiting.
|
||||
$primary->safe_psql('postgres', 'SELECT pg_log_standby_snapshot()');
|
||||
|
||||
$handle->finish();
|
||||
|
||||
is($self->slot($slot_name)->{'slot_type'}, 'logical', $slot_name . ' on standby created')
|
||||
or die "could not create slot" . $slot_name;
|
||||
}
|
||||
|
||||
=pod
|
||||
|
||||
=back
|
||||
|
||||
=cut
|
||||
|
||||
@ -40,6 +40,7 @@ tests += {
|
||||
't/032_relfilenode_reuse.pl',
|
||||
't/033_replay_tsp_drops.pl',
|
||||
't/034_create_database.pl',
|
||||
't/035_standby_logical_decoding.pl',
|
||||
],
|
||||
},
|
||||
}
|
||||
|
||||
734
src/test/recovery/t/035_standby_logical_decoding.pl
Normal file
734
src/test/recovery/t/035_standby_logical_decoding.pl
Normal file
@ -0,0 +1,734 @@
|
||||
# Copyright (c) 2023, PostgreSQL Global Development Group
|
||||
|
||||
# logical decoding on standby : test logical decoding,
|
||||
# recovery conflict and standby promotion.
|
||||
|
||||
use strict;
|
||||
use warnings;
|
||||
|
||||
use PostgreSQL::Test::Cluster;
|
||||
use PostgreSQL::Test::Utils;
|
||||
use Test::More;
|
||||
|
||||
my ($stdin, $stdout, $stderr, $cascading_stdout, $cascading_stderr, $ret, $handle, $slot);
|
||||
|
||||
my $node_primary = PostgreSQL::Test::Cluster->new('primary');
|
||||
my $node_standby = PostgreSQL::Test::Cluster->new('standby');
|
||||
my $node_cascading_standby = PostgreSQL::Test::Cluster->new('cascading_standby');
|
||||
my $default_timeout = $PostgreSQL::Test::Utils::timeout_default;
|
||||
my $res;
|
||||
|
||||
# Name for the physical slot on primary
|
||||
my $primary_slotname = 'primary_physical';
|
||||
my $standby_physical_slotname = 'standby_physical';
|
||||
|
||||
# find $pat in logfile of $node after $off-th byte
|
||||
sub find_in_log
|
||||
{
|
||||
my ($node, $pat, $off) = @_;
|
||||
|
||||
$off = 0 unless defined $off;
|
||||
my $log = PostgreSQL::Test::Utils::slurp_file($node->logfile);
|
||||
return 0 if (length($log) <= $off);
|
||||
|
||||
$log = substr($log, $off);
|
||||
|
||||
return $log =~ m/$pat/;
|
||||
}
|
||||
|
||||
# Fetch xmin columns from slot's pg_replication_slots row, after waiting for
|
||||
# given boolean condition to be true to ensure we've reached a quiescent state.
|
||||
sub wait_for_xmins
|
||||
{
|
||||
my ($node, $slotname, $check_expr) = @_;
|
||||
|
||||
$node->poll_query_until(
|
||||
'postgres', qq[
|
||||
SELECT $check_expr
|
||||
FROM pg_catalog.pg_replication_slots
|
||||
WHERE slot_name = '$slotname';
|
||||
]) or die "Timed out waiting for slot xmins to advance";
|
||||
}
|
||||
|
||||
# Create the required logical slots on standby.
|
||||
sub create_logical_slots
|
||||
{
|
||||
my ($node, $slot_prefix) = @_;
|
||||
|
||||
my $active_slot = $slot_prefix . 'activeslot';
|
||||
my $inactive_slot = $slot_prefix . 'inactiveslot';
|
||||
$node->create_logical_slot_on_standby($node_primary, qq($inactive_slot), 'testdb');
|
||||
$node->create_logical_slot_on_standby($node_primary, qq($active_slot), 'testdb');
|
||||
}
|
||||
|
||||
# Drop the logical slots on standby.
|
||||
sub drop_logical_slots
|
||||
{
|
||||
my ($slot_prefix) = @_;
|
||||
my $active_slot = $slot_prefix . 'activeslot';
|
||||
my $inactive_slot = $slot_prefix . 'inactiveslot';
|
||||
|
||||
$node_standby->psql('postgres', qq[SELECT pg_drop_replication_slot('$inactive_slot')]);
|
||||
$node_standby->psql('postgres', qq[SELECT pg_drop_replication_slot('$active_slot')]);
|
||||
}
|
||||
|
||||
# Acquire one of the standby logical slots created by create_logical_slots().
|
||||
# In case wait is true we are waiting for an active pid on the 'activeslot' slot.
|
||||
# If wait is not true it means we are testing a known failure scenario.
|
||||
sub make_slot_active
|
||||
{
|
||||
my ($node, $slot_prefix, $wait, $to_stdout, $to_stderr) = @_;
|
||||
my $slot_user_handle;
|
||||
|
||||
my $active_slot = $slot_prefix . 'activeslot';
|
||||
$slot_user_handle = IPC::Run::start(['pg_recvlogical', '-d', $node->connstr('testdb'), '-S', qq($active_slot), '-o', 'include-xids=0', '-o', 'skip-empty-xacts=1', '--no-loop', '--start', '-f', '-'], '>', $to_stdout, '2>', $to_stderr);
|
||||
|
||||
if ($wait)
|
||||
{
|
||||
# make sure activeslot is in use
|
||||
$node->poll_query_until('testdb',
|
||||
qq[SELECT EXISTS (SELECT 1 FROM pg_replication_slots WHERE slot_name = '$active_slot' AND active_pid IS NOT NULL)]
|
||||
) or die "slot never became active";
|
||||
}
|
||||
return $slot_user_handle;
|
||||
}
|
||||
|
||||
# Check pg_recvlogical stderr
|
||||
sub check_pg_recvlogical_stderr
|
||||
{
|
||||
my ($slot_user_handle, $check_stderr) = @_;
|
||||
my $return;
|
||||
|
||||
# our client should've terminated in response to the walsender error
|
||||
$slot_user_handle->finish;
|
||||
$return = $?;
|
||||
cmp_ok($return, "!=", 0, "pg_recvlogical exited non-zero");
|
||||
if ($return) {
|
||||
like($stderr, qr/$check_stderr/, 'slot has been invalidated');
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
# Check if all the slots on standby are dropped. These include the 'activeslot'
|
||||
# that was acquired by make_slot_active(), and the non-active 'inactiveslot'.
|
||||
sub check_slots_dropped
|
||||
{
|
||||
my ($slot_prefix, $slot_user_handle) = @_;
|
||||
|
||||
is($node_standby->slot($slot_prefix . 'inactiveslot')->{'slot_type'}, '', 'inactiveslot on standby dropped');
|
||||
is($node_standby->slot($slot_prefix . 'activeslot')->{'slot_type'}, '', 'activeslot on standby dropped');
|
||||
|
||||
check_pg_recvlogical_stderr($slot_user_handle, "conflict with recovery");
|
||||
}
|
||||
|
||||
# Change hot_standby_feedback and check xmin and catalog_xmin values.
|
||||
sub change_hot_standby_feedback_and_wait_for_xmins
|
||||
{
|
||||
my ($hsf, $invalidated) = @_;
|
||||
|
||||
$node_standby->append_conf('postgresql.conf',qq[
|
||||
hot_standby_feedback = $hsf
|
||||
]);
|
||||
|
||||
$node_standby->reload;
|
||||
|
||||
if ($hsf && $invalidated)
|
||||
{
|
||||
# With hot_standby_feedback on, xmin should advance,
|
||||
# but catalog_xmin should still remain NULL since there is no logical slot.
|
||||
wait_for_xmins($node_primary, $primary_slotname,
|
||||
"xmin IS NOT NULL AND catalog_xmin IS NULL");
|
||||
}
|
||||
elsif ($hsf)
|
||||
{
|
||||
# With hot_standby_feedback on, xmin and catalog_xmin should advance.
|
||||
wait_for_xmins($node_primary, $primary_slotname,
|
||||
"xmin IS NOT NULL AND catalog_xmin IS NOT NULL");
|
||||
}
|
||||
else
|
||||
{
|
||||
# Both should be NULL since hs_feedback is off
|
||||
wait_for_xmins($node_primary, $primary_slotname,
|
||||
"xmin IS NULL AND catalog_xmin IS NULL");
|
||||
|
||||
}
|
||||
}
|
||||
|
||||
# Check conflicting status in pg_replication_slots.
|
||||
sub check_slots_conflicting_status
|
||||
{
|
||||
my ($conflicting) = @_;
|
||||
|
||||
if ($conflicting)
|
||||
{
|
||||
$res = $node_standby->safe_psql(
|
||||
'postgres', qq(
|
||||
select bool_and(conflicting) from pg_replication_slots;));
|
||||
|
||||
is($res, 't',
|
||||
"Logical slots are reported as conflicting");
|
||||
}
|
||||
else
|
||||
{
|
||||
$res = $node_standby->safe_psql(
|
||||
'postgres', qq(
|
||||
select bool_or(conflicting) from pg_replication_slots;));
|
||||
|
||||
is($res, 'f',
|
||||
"Logical slots are reported as non conflicting");
|
||||
}
|
||||
}
|
||||
|
||||
# Drop the slots, re-create them, change hot_standby_feedback,
|
||||
# check xmin and catalog_xmin values, make slot active and reset stat.
|
||||
sub reactive_slots_change_hfs_and_wait_for_xmins
|
||||
{
|
||||
my ($previous_slot_prefix, $slot_prefix, $hsf, $invalidated) = @_;
|
||||
|
||||
# drop the logical slots
|
||||
drop_logical_slots($previous_slot_prefix);
|
||||
|
||||
# create the logical slots
|
||||
create_logical_slots($node_standby, $slot_prefix);
|
||||
|
||||
change_hot_standby_feedback_and_wait_for_xmins($hsf, $invalidated);
|
||||
|
||||
$handle = make_slot_active($node_standby, $slot_prefix, 1, \$stdout, \$stderr);
|
||||
|
||||
# reset stat: easier to check for confl_active_logicalslot in pg_stat_database_conflicts
|
||||
$node_standby->psql('testdb', q[select pg_stat_reset();]);
|
||||
}
|
||||
|
||||
# Check invalidation in the logfile and in pg_stat_database_conflicts
|
||||
sub check_for_invalidation
|
||||
{
|
||||
my ($slot_prefix, $log_start, $test_name) = @_;
|
||||
|
||||
my $active_slot = $slot_prefix . 'activeslot';
|
||||
my $inactive_slot = $slot_prefix . 'inactiveslot';
|
||||
|
||||
# message should be issued
|
||||
ok( find_in_log(
|
||||
$node_standby,
|
||||
"invalidating obsolete replication slot \"$inactive_slot\"", $log_start),
|
||||
"inactiveslot slot invalidation is logged $test_name");
|
||||
|
||||
ok( find_in_log(
|
||||
$node_standby,
|
||||
"invalidating obsolete replication slot \"$active_slot\"", $log_start),
|
||||
"activeslot slot invalidation is logged $test_name");
|
||||
|
||||
# Verify that pg_stat_database_conflicts.confl_active_logicalslot has been updated
|
||||
ok( $node_standby->poll_query_until(
|
||||
'postgres',
|
||||
"select (confl_active_logicalslot = 1) from pg_stat_database_conflicts where datname = 'testdb'", 't'),
|
||||
'confl_active_logicalslot updated') or die "Timed out waiting confl_active_logicalslot to be updated";
|
||||
}
|
||||
|
||||
########################
|
||||
# Initialize primary node
|
||||
########################
|
||||
|
||||
$node_primary->init(allows_streaming => 1, has_archiving => 1);
|
||||
$node_primary->append_conf('postgresql.conf', q{
|
||||
wal_level = 'logical'
|
||||
max_replication_slots = 4
|
||||
max_wal_senders = 4
|
||||
log_min_messages = 'debug2'
|
||||
log_error_verbosity = verbose
|
||||
});
|
||||
$node_primary->dump_info;
|
||||
$node_primary->start;
|
||||
|
||||
$node_primary->psql('postgres', q[CREATE DATABASE testdb]);
|
||||
|
||||
$node_primary->safe_psql('testdb', qq[SELECT * FROM pg_create_physical_replication_slot('$primary_slotname');]);
|
||||
|
||||
# Check conflicting is NULL for physical slot
|
||||
$res = $node_primary->safe_psql(
|
||||
'postgres', qq[
|
||||
SELECT conflicting is null FROM pg_replication_slots where slot_name = '$primary_slotname';]);
|
||||
|
||||
is($res, 't',
|
||||
"Physical slot reports conflicting as NULL");
|
||||
|
||||
my $backup_name = 'b1';
|
||||
$node_primary->backup($backup_name);
|
||||
|
||||
# Some tests need to wait for VACUUM to be replayed. But vacuum does not flush
|
||||
# WAL. An insert into flush_wal outside transaction does guarantee a flush.
|
||||
$node_primary->psql('testdb', q[CREATE TABLE flush_wal();]);
|
||||
|
||||
#######################
|
||||
# Initialize standby node
|
||||
#######################
|
||||
|
||||
$node_standby->init_from_backup(
|
||||
$node_primary, $backup_name,
|
||||
has_streaming => 1,
|
||||
has_restoring => 1);
|
||||
$node_standby->append_conf('postgresql.conf',
|
||||
qq[primary_slot_name = '$primary_slotname']);
|
||||
$node_standby->start;
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
$node_standby->safe_psql('testdb', qq[SELECT * FROM pg_create_physical_replication_slot('$standby_physical_slotname');]);
|
||||
|
||||
#######################
|
||||
# Initialize cascading standby node
|
||||
#######################
|
||||
$node_standby->backup($backup_name);
|
||||
$node_cascading_standby->init_from_backup(
|
||||
$node_standby, $backup_name,
|
||||
has_streaming => 1,
|
||||
has_restoring => 1);
|
||||
$node_cascading_standby->append_conf('postgresql.conf',
|
||||
qq[primary_slot_name = '$standby_physical_slotname']);
|
||||
$node_cascading_standby->start;
|
||||
$node_standby->wait_for_replay_catchup($node_cascading_standby, $node_primary);
|
||||
|
||||
##################################################
|
||||
# Test that logical decoding on the standby
|
||||
# behaves correctly.
|
||||
##################################################
|
||||
|
||||
# create the logical slots
|
||||
create_logical_slots($node_standby, 'behaves_ok_');
|
||||
|
||||
$node_primary->safe_psql('testdb', qq[CREATE TABLE decoding_test(x integer, y text);]);
|
||||
$node_primary->safe_psql('testdb', qq[INSERT INTO decoding_test(x,y) SELECT s, s::text FROM generate_series(1,10) s;]);
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
my $result = $node_standby->safe_psql('testdb',
|
||||
qq[SELECT pg_logical_slot_get_changes('behaves_ok_activeslot', NULL, NULL);]);
|
||||
|
||||
# test if basic decoding works
|
||||
is(scalar(my @foobar = split /^/m, $result),
|
||||
14, 'Decoding produced 14 rows (2 BEGIN/COMMIT and 10 rows)');
|
||||
|
||||
# Insert some rows and verify that we get the same results from pg_recvlogical
|
||||
# and the SQL interface.
|
||||
$node_primary->safe_psql('testdb',
|
||||
qq[INSERT INTO decoding_test(x,y) SELECT s, s::text FROM generate_series(1,4) s;]
|
||||
);
|
||||
|
||||
my $expected = q{BEGIN
|
||||
table public.decoding_test: INSERT: x[integer]:1 y[text]:'1'
|
||||
table public.decoding_test: INSERT: x[integer]:2 y[text]:'2'
|
||||
table public.decoding_test: INSERT: x[integer]:3 y[text]:'3'
|
||||
table public.decoding_test: INSERT: x[integer]:4 y[text]:'4'
|
||||
COMMIT};
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
my $stdout_sql = $node_standby->safe_psql('testdb',
|
||||
qq[SELECT data FROM pg_logical_slot_peek_changes('behaves_ok_activeslot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');]
|
||||
);
|
||||
|
||||
is($stdout_sql, $expected, 'got expected output from SQL decoding session');
|
||||
|
||||
my $endpos = $node_standby->safe_psql('testdb',
|
||||
"SELECT lsn FROM pg_logical_slot_peek_changes('behaves_ok_activeslot', NULL, NULL) ORDER BY lsn DESC LIMIT 1;"
|
||||
);
|
||||
|
||||
# Insert some rows after $endpos, which we won't read.
|
||||
$node_primary->safe_psql('testdb',
|
||||
qq[INSERT INTO decoding_test(x,y) SELECT s, s::text FROM generate_series(5,50) s;]
|
||||
);
|
||||
|
||||
$node_primary->wait_for_catchup($node_standby);
|
||||
|
||||
my $stdout_recv = $node_standby->pg_recvlogical_upto(
|
||||
'testdb', 'behaves_ok_activeslot', $endpos, $default_timeout,
|
||||
'include-xids' => '0',
|
||||
'skip-empty-xacts' => '1');
|
||||
chomp($stdout_recv);
|
||||
is($stdout_recv, $expected,
|
||||
'got same expected output from pg_recvlogical decoding session');
|
||||
|
||||
$node_standby->poll_query_until('testdb',
|
||||
"SELECT EXISTS (SELECT 1 FROM pg_replication_slots WHERE slot_name = 'behaves_ok_activeslot' AND active_pid IS NULL)"
|
||||
) or die "slot never became inactive";
|
||||
|
||||
$stdout_recv = $node_standby->pg_recvlogical_upto(
|
||||
'testdb', 'behaves_ok_activeslot', $endpos, $default_timeout,
|
||||
'include-xids' => '0',
|
||||
'skip-empty-xacts' => '1');
|
||||
chomp($stdout_recv);
|
||||
is($stdout_recv, '', 'pg_recvlogical acknowledged changes');
|
||||
|
||||
$node_primary->safe_psql('postgres', 'CREATE DATABASE otherdb');
|
||||
|
||||
is( $node_primary->psql(
|
||||
'otherdb',
|
||||
"SELECT lsn FROM pg_logical_slot_peek_changes('behaves_ok_activeslot', NULL, NULL) ORDER BY lsn DESC LIMIT 1;"
|
||||
),
|
||||
3,
|
||||
'replaying logical slot from another database fails');
|
||||
|
||||
##################################################
|
||||
# Recovery conflict: Invalidate conflicting slots, including in-use slots
|
||||
# Scenario 1: hot_standby_feedback off and vacuum FULL
|
||||
##################################################
|
||||
|
||||
# One way to produce recovery conflict is to create/drop a relation and
|
||||
# launch a vacuum full on pg_class with hot_standby_feedback turned off on
|
||||
# the standby.
|
||||
reactive_slots_change_hfs_and_wait_for_xmins('behaves_ok_', 'vacuum_full_', 0, 1);
|
||||
|
||||
# This should trigger the conflict
|
||||
$node_primary->safe_psql('testdb', qq[
|
||||
CREATE TABLE conflict_test(x integer, y text);
|
||||
DROP TABLE conflict_test;
|
||||
VACUUM full pg_class;
|
||||
INSERT INTO flush_wal DEFAULT VALUES; -- see create table flush_wal
|
||||
]);
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
# Check invalidation in the logfile and in pg_stat_database_conflicts
|
||||
check_for_invalidation('vacuum_full_', 1, 'with vacuum FULL on pg_class');
|
||||
|
||||
# Verify slots are reported as conflicting in pg_replication_slots
|
||||
check_slots_conflicting_status(1);
|
||||
|
||||
$handle = make_slot_active($node_standby, 'vacuum_full_', 0, \$stdout, \$stderr);
|
||||
|
||||
# We are not able to read from the slot as it has been invalidated
|
||||
check_pg_recvlogical_stderr($handle, "can no longer get changes from replication slot \"vacuum_full_activeslot\"");
|
||||
|
||||
# Turn hot_standby_feedback back on
|
||||
change_hot_standby_feedback_and_wait_for_xmins(1,1);
|
||||
|
||||
##################################################
|
||||
# Verify that invalidated logical slots stay invalidated across a restart.
|
||||
##################################################
|
||||
$node_standby->restart;
|
||||
|
||||
# Verify slots are reported as conflicting in pg_replication_slots
|
||||
check_slots_conflicting_status(1);
|
||||
|
||||
##################################################
|
||||
# Verify that invalidated logical slots do not lead to retaining WAL
|
||||
##################################################
|
||||
# XXXXX TODO
|
||||
|
||||
##################################################
|
||||
# Recovery conflict: Invalidate conflicting slots, including in-use slots
|
||||
# Scenario 2: conflict due to row removal with hot_standby_feedback off.
|
||||
##################################################
|
||||
|
||||
# get the position to search from in the standby logfile
|
||||
my $logstart = -s $node_standby->logfile;
|
||||
|
||||
# One way to produce recovery conflict is to create/drop a relation and
|
||||
# launch a vacuum on pg_class with hot_standby_feedback turned off on the standby.
|
||||
reactive_slots_change_hfs_and_wait_for_xmins('vacuum_full_', 'row_removal_', 0, 1);
|
||||
|
||||
# This should trigger the conflict
|
||||
$node_primary->safe_psql('testdb', qq[
|
||||
CREATE TABLE conflict_test(x integer, y text);
|
||||
DROP TABLE conflict_test;
|
||||
VACUUM pg_class;
|
||||
INSERT INTO flush_wal DEFAULT VALUES; -- see create table flush_wal
|
||||
]);
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
# Check invalidation in the logfile and in pg_stat_database_conflicts
|
||||
check_for_invalidation('row_removal_', $logstart, 'with vacuum on pg_class');
|
||||
|
||||
# Verify slots are reported as conflicting in pg_replication_slots
|
||||
check_slots_conflicting_status(1);
|
||||
|
||||
$handle = make_slot_active($node_standby, 'row_removal_', 0, \$stdout, \$stderr);
|
||||
|
||||
# We are not able to read from the slot as it has been invalidated
|
||||
check_pg_recvlogical_stderr($handle, "can no longer get changes from replication slot \"row_removal_activeslot\"");
|
||||
|
||||
##################################################
|
||||
# Recovery conflict: Same as Scenario 2 but on a shared catalog table
|
||||
# Scenario 3: conflict due to row removal with hot_standby_feedback off.
|
||||
##################################################
|
||||
|
||||
# get the position to search from in the standby logfile
|
||||
$logstart = -s $node_standby->logfile;
|
||||
|
||||
# One way to produce recovery conflict is to create/drop a relation and
|
||||
# launch a vacuum on pg_class with hot_standby_feedback turned off on the standby.
|
||||
reactive_slots_change_hfs_and_wait_for_xmins('row_removal_', 'shared_row_removal_', 0, 1);
|
||||
|
||||
# Trigger the conflict
|
||||
diag $node_primary->safe_psql('testdb', qq[
|
||||
CREATE ROLE create_trash;
|
||||
DROP ROLE create_trash;
|
||||
VACUUM pg_authid;
|
||||
INSERT INTO flush_wal DEFAULT VALUES; -- see create table flush_wal
|
||||
]);
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
# Check invalidation in the logfile and in pg_stat_database_conflicts
|
||||
check_for_invalidation('shared_row_removal_', $logstart, 'with vacuum on pg_authid');
|
||||
|
||||
# Verify slots are reported as conflicting in pg_replication_slots
|
||||
check_slots_conflicting_status(1);
|
||||
|
||||
$handle = make_slot_active($node_standby, 'shared_row_removal_', 0, \$stdout, \$stderr);
|
||||
|
||||
# We are not able to read from the slot as it has been invalidated
|
||||
check_pg_recvlogical_stderr($handle, "can no longer get changes from replication slot \"shared_row_removal_activeslot\"");
|
||||
|
||||
##################################################
|
||||
# Recovery conflict: Same as Scenario 2 but on a non catalog table
|
||||
# Scenario 4: No conflict expected.
|
||||
##################################################
|
||||
|
||||
# get the position to search from in the standby logfile
|
||||
$logstart = -s $node_standby->logfile;
|
||||
|
||||
reactive_slots_change_hfs_and_wait_for_xmins('shared_row_removal_', 'no_conflict_', 0, 1);
|
||||
|
||||
# This should not trigger a conflict
|
||||
$node_primary->safe_psql('testdb', qq[
|
||||
CREATE TABLE conflict_test(x integer, y text);
|
||||
INSERT INTO conflict_test(x,y) SELECT s, s::text FROM generate_series(1,4) s;
|
||||
UPDATE conflict_test set x=1, y=1;
|
||||
VACUUM conflict_test;
|
||||
INSERT INTO flush_wal DEFAULT VALUES; -- see create table flush_wal
|
||||
]);
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
# message should not be issued
|
||||
ok( !find_in_log(
|
||||
$node_standby,
|
||||
"invalidating obsolete slot \"no_conflict_inactiveslot\"", $logstart),
|
||||
'inactiveslot slot invalidation is not logged with vacuum on conflict_test');
|
||||
|
||||
ok( !find_in_log(
|
||||
$node_standby,
|
||||
"invalidating obsolete slot \"no_conflict_activeslot\"", $logstart),
|
||||
'activeslot slot invalidation is not logged with vacuum on conflict_test');
|
||||
|
||||
# Verify that pg_stat_database_conflicts.confl_active_logicalslot has not been updated
|
||||
ok( $node_standby->poll_query_until(
|
||||
'postgres',
|
||||
"select (confl_active_logicalslot = 0) from pg_stat_database_conflicts where datname = 'testdb'", 't'),
|
||||
'confl_active_logicalslot not updated') or die "Timed out waiting confl_active_logicalslot to be updated";
|
||||
|
||||
# Verify slots are reported as non conflicting in pg_replication_slots
|
||||
check_slots_conflicting_status(0);
|
||||
|
||||
# Turn hot_standby_feedback back on
|
||||
change_hot_standby_feedback_and_wait_for_xmins(1, 0);
|
||||
|
||||
# Restart the standby node to ensure no slots are still active
|
||||
$node_standby->restart;
|
||||
|
||||
##################################################
|
||||
# Recovery conflict: Invalidate conflicting slots, including in-use slots
|
||||
# Scenario 4: conflict due to on-access pruning.
|
||||
##################################################
|
||||
|
||||
# get the position to search from in the standby logfile
|
||||
$logstart = -s $node_standby->logfile;
|
||||
|
||||
# One way to produce recovery conflict is to trigger an on-access pruning
|
||||
# on a relation marked as user_catalog_table.
|
||||
reactive_slots_change_hfs_and_wait_for_xmins('no_conflict_', 'pruning_', 0, 0);
|
||||
|
||||
# This should trigger the conflict
|
||||
$node_primary->safe_psql('testdb', qq[CREATE TABLE prun(id integer, s char(2000)) WITH (fillfactor = 75, user_catalog_table = true);]);
|
||||
$node_primary->safe_psql('testdb', qq[INSERT INTO prun VALUES (1, 'A');]);
|
||||
$node_primary->safe_psql('testdb', qq[UPDATE prun SET s = 'B';]);
|
||||
$node_primary->safe_psql('testdb', qq[UPDATE prun SET s = 'C';]);
|
||||
$node_primary->safe_psql('testdb', qq[UPDATE prun SET s = 'D';]);
|
||||
$node_primary->safe_psql('testdb', qq[UPDATE prun SET s = 'E';]);
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
# Check invalidation in the logfile and in pg_stat_database_conflicts
|
||||
check_for_invalidation('pruning_', $logstart, 'with on-access pruning');
|
||||
|
||||
# Verify slots are reported as conflicting in pg_replication_slots
|
||||
check_slots_conflicting_status(1);
|
||||
|
||||
$handle = make_slot_active($node_standby, 'pruning_', 0, \$stdout, \$stderr);
|
||||
|
||||
# We are not able to read from the slot as it has been invalidated
|
||||
check_pg_recvlogical_stderr($handle, "can no longer get changes from replication slot \"pruning_activeslot\"");
|
||||
|
||||
# Turn hot_standby_feedback back on
|
||||
change_hot_standby_feedback_and_wait_for_xmins(1, 1);
|
||||
|
||||
##################################################
|
||||
# Recovery conflict: Invalidate conflicting slots, including in-use slots
|
||||
# Scenario 5: incorrect wal_level on primary.
|
||||
##################################################
|
||||
|
||||
# get the position to search from in the standby logfile
|
||||
$logstart = -s $node_standby->logfile;
|
||||
|
||||
# drop the logical slots
|
||||
drop_logical_slots('pruning_');
|
||||
|
||||
# create the logical slots
|
||||
create_logical_slots($node_standby, 'wal_level_');
|
||||
|
||||
$handle = make_slot_active($node_standby, 'wal_level_', 1, \$stdout, \$stderr);
|
||||
|
||||
# reset stat: easier to check for confl_active_logicalslot in pg_stat_database_conflicts
|
||||
$node_standby->psql('testdb', q[select pg_stat_reset();]);
|
||||
|
||||
# Make primary wal_level replica. This will trigger slot conflict.
|
||||
$node_primary->append_conf('postgresql.conf',q[
|
||||
wal_level = 'replica'
|
||||
]);
|
||||
$node_primary->restart;
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
# Check invalidation in the logfile and in pg_stat_database_conflicts
|
||||
check_for_invalidation('wal_level_', $logstart, 'due to wal_level');
|
||||
|
||||
# Verify slots are reported as conflicting in pg_replication_slots
|
||||
check_slots_conflicting_status(1);
|
||||
|
||||
$handle = make_slot_active($node_standby, 'wal_level_', 0, \$stdout, \$stderr);
|
||||
# We are not able to read from the slot as it requires wal_level at least logical on the primary server
|
||||
check_pg_recvlogical_stderr($handle, "logical decoding on a standby requires wal_level to be at least logical on the primary");
|
||||
|
||||
# Restore primary wal_level
|
||||
$node_primary->append_conf('postgresql.conf',q[
|
||||
wal_level = 'logical'
|
||||
]);
|
||||
$node_primary->restart;
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
$handle = make_slot_active($node_standby, 'wal_level_', 0, \$stdout, \$stderr);
|
||||
# as the slot has been invalidated we should not be able to read
|
||||
check_pg_recvlogical_stderr($handle, "can no longer get changes from replication slot \"wal_level_activeslot\"");
|
||||
|
||||
##################################################
|
||||
# DROP DATABASE should drops it's slots, including active slots.
|
||||
##################################################
|
||||
|
||||
# drop the logical slots
|
||||
drop_logical_slots('wal_level_');
|
||||
|
||||
# create the logical slots
|
||||
create_logical_slots($node_standby, 'drop_db_');
|
||||
|
||||
$handle = make_slot_active($node_standby, 'drop_db_', 1, \$stdout, \$stderr);
|
||||
|
||||
# Create a slot on a database that would not be dropped. This slot should not
|
||||
# get dropped.
|
||||
$node_standby->create_logical_slot_on_standby($node_primary, 'otherslot', 'postgres');
|
||||
|
||||
# dropdb on the primary to verify slots are dropped on standby
|
||||
$node_primary->safe_psql('postgres', q[DROP DATABASE testdb]);
|
||||
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
|
||||
is($node_standby->safe_psql('postgres',
|
||||
q[SELECT EXISTS(SELECT 1 FROM pg_database WHERE datname = 'testdb')]), 'f',
|
||||
'database dropped on standby');
|
||||
|
||||
check_slots_dropped('drop_db', $handle);
|
||||
|
||||
is($node_standby->slot('otherslot')->{'slot_type'}, 'logical',
|
||||
'otherslot on standby not dropped');
|
||||
|
||||
# Cleanup : manually drop the slot that was not dropped.
|
||||
$node_standby->psql('postgres', q[SELECT pg_drop_replication_slot('otherslot')]);
|
||||
|
||||
##################################################
|
||||
# Test standby promotion and logical decoding behavior
|
||||
# after the standby gets promoted.
|
||||
##################################################
|
||||
|
||||
$node_standby->reload;
|
||||
|
||||
$node_primary->psql('postgres', q[CREATE DATABASE testdb]);
|
||||
$node_primary->safe_psql('testdb', qq[CREATE TABLE decoding_test(x integer, y text);]);
|
||||
|
||||
# create the logical slots
|
||||
create_logical_slots($node_standby, 'promotion_');
|
||||
|
||||
# create the logical slots on the cascading standby too
|
||||
create_logical_slots($node_cascading_standby, 'promotion_');
|
||||
|
||||
# Make slots actives
|
||||
$handle = make_slot_active($node_standby, 'promotion_', 1, \$stdout, \$stderr);
|
||||
my $cascading_handle = make_slot_active($node_cascading_standby, 'promotion_', 1, \$cascading_stdout, \$cascading_stderr);
|
||||
|
||||
# Insert some rows before the promotion
|
||||
$node_primary->safe_psql('testdb',
|
||||
qq[INSERT INTO decoding_test(x,y) SELECT s, s::text FROM generate_series(1,4) s;]
|
||||
);
|
||||
|
||||
# Wait for both standbys to catchup
|
||||
$node_primary->wait_for_replay_catchup($node_standby);
|
||||
$node_standby->wait_for_replay_catchup($node_cascading_standby, $node_primary);
|
||||
|
||||
# promote
|
||||
$node_standby->promote;
|
||||
|
||||
# insert some rows on promoted standby
|
||||
$node_standby->safe_psql('testdb',
|
||||
qq[INSERT INTO decoding_test(x,y) SELECT s, s::text FROM generate_series(5,7) s;]
|
||||
);
|
||||
|
||||
# Wait for the cascading standby to catchup
|
||||
$node_standby->wait_for_replay_catchup($node_cascading_standby);
|
||||
|
||||
$expected = q{BEGIN
|
||||
table public.decoding_test: INSERT: x[integer]:1 y[text]:'1'
|
||||
table public.decoding_test: INSERT: x[integer]:2 y[text]:'2'
|
||||
table public.decoding_test: INSERT: x[integer]:3 y[text]:'3'
|
||||
table public.decoding_test: INSERT: x[integer]:4 y[text]:'4'
|
||||
COMMIT
|
||||
BEGIN
|
||||
table public.decoding_test: INSERT: x[integer]:5 y[text]:'5'
|
||||
table public.decoding_test: INSERT: x[integer]:6 y[text]:'6'
|
||||
table public.decoding_test: INSERT: x[integer]:7 y[text]:'7'
|
||||
COMMIT};
|
||||
|
||||
# check that we are decoding pre and post promotion inserted rows
|
||||
$stdout_sql = $node_standby->safe_psql('testdb',
|
||||
qq[SELECT data FROM pg_logical_slot_peek_changes('promotion_inactiveslot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');]
|
||||
);
|
||||
|
||||
is($stdout_sql, $expected, 'got expected output from SQL decoding session on promoted standby');
|
||||
|
||||
# check that we are decoding pre and post promotion inserted rows
|
||||
# with pg_recvlogical that has started before the promotion
|
||||
my $pump_timeout = IPC::Run::timer($PostgreSQL::Test::Utils::timeout_default);
|
||||
|
||||
ok( pump_until(
|
||||
$handle, $pump_timeout, \$stdout, qr/^.*COMMIT.*COMMIT$/s),
|
||||
'got 2 COMMIT from pg_recvlogical output');
|
||||
|
||||
chomp($stdout);
|
||||
is($stdout, $expected,
|
||||
'got same expected output from pg_recvlogical decoding session');
|
||||
|
||||
# check that we are decoding pre and post promotion inserted rows on the cascading standby
|
||||
$stdout_sql = $node_cascading_standby->safe_psql('testdb',
|
||||
qq[SELECT data FROM pg_logical_slot_peek_changes('promotion_inactiveslot', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');]
|
||||
);
|
||||
|
||||
is($stdout_sql, $expected, 'got expected output from SQL decoding session on cascading standby');
|
||||
|
||||
# check that we are decoding pre and post promotion inserted rows
|
||||
# with pg_recvlogical that has started before the promotion on the cascading standby
|
||||
ok( pump_until(
|
||||
$cascading_handle, $pump_timeout, \$cascading_stdout, qr/^.*COMMIT.*COMMIT$/s),
|
||||
'got 2 COMMIT from pg_recvlogical output');
|
||||
|
||||
chomp($cascading_stdout);
|
||||
is($cascading_stdout, $expected,
|
||||
'got same expected output from pg_recvlogical decoding session on cascading standby');
|
||||
|
||||
done_testing();
|
||||
Loading…
x
Reference in New Issue
Block a user