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Fix pg_bsaebackup checksum tests 

Hopefully fix the fact that these checks are unstable, by introducing
the corruption in a separate table from pg_class, and also explicitly
disable autovacuum on those tables. Also make sure PostgreSQL is
stopped while the corruption is introduced to avoid possible caching
effects.

Author: Michael Banck
This commit is contained in:
Magnus Hagander 2018-04-04 11:35:48 +02:00
parent f044d71e33
commit ee9e145531
1 changed files with 24 additions and 11 deletions
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35
src/bin/pg_basebackup/t/010_pg_basebackup.pl
View File

@ -406,19 +406,25 @@ like(
my $checksum = $node->safe_psql('postgres', 'SHOW data_checksums;');
is($checksum, 'on', 'checksums are enabled');
# get relfilenodes of relations to corrupt
my $pg_class = $node->safe_psql('postgres',
q{SELECT pg_relation_filepath('pg_class')}
# create tables to corrupt and get their relfilenodes
my $file_corrupt1 = $node->safe_psql('postgres',
q{SELECT a INTO corrupt1 FROM generate_series(1,10000) AS a; ALTER TABLE corrupt1 SET (autovacuum_enabled=false); SELECT pg_relation_filepath('corrupt1')}
);
my $pg_index = $node->safe_psql('postgres',
q{SELECT pg_relation_filepath('pg_index')}
my $file_corrupt2 = $node->safe_psql('postgres',
q{SELECT b INTO corrupt2 FROM generate_series(1,2) AS b; ALTER TABLE corrupt2 SET (autovacuum_enabled=false); SELECT pg_relation_filepath('corrupt2')}
);
# set page header and block sizes
my $pageheader_size = 24;
my $block_size = $node->safe_psql('postgres', 'SHOW block_size;');
# induce corruption
open $file, '+<', "$pgdata/$pg_class";
seek($file, 4000, 0);
system_or_bail 'pg_ctl', '-D', $pgdata, 'stop';
open $file, '+<', "$pgdata/$file_corrupt1";
seek($file, $pageheader_size, 0);
syswrite($file, '\0\0\0\0\0\0\0\0\0');
close $file;
system_or_bail 'pg_ctl', '-D', $pgdata, 'start';
$node->command_checks_all([ 'pg_basebackup', '-D', "$tempdir/backup_corrupt"],
1,
@ -428,13 +434,15 @@ $node->command_checks_all([ 'pg_basebackup', '-D', "$tempdir/backup_corrupt"],
);
# induce further corruption in 5 more blocks
open $file, '+<', "$pgdata/$pg_class";
my @offsets = (12192, 20384, 28576, 36768, 44960);
foreach my $offset (@offsets) {
system_or_bail 'pg_ctl', '-D', $pgdata, 'stop';
open $file, '+<', "$pgdata/$file_corrupt1";
for my $i ( 1..5 ) {
my $offset = $pageheader_size + $i * $block_size;
seek($file, $offset, 0);
syswrite($file, '\0\0\0\0\0\0\0\0\0');
}
close $file;
system_or_bail 'pg_ctl', '-D', $pgdata, 'start';
$node->command_checks_all([ 'pg_basebackup', '-D', "$tempdir/backup_corrupt2"],
1,
@ -444,10 +452,12 @@ $node->command_checks_all([ 'pg_basebackup', '-D', "$tempdir/backup_corrupt2"],
);
# induce corruption in a second file
open $file, '+<', "$pgdata/$pg_index";
system_or_bail 'pg_ctl', '-D', $pgdata, 'stop';
open $file, '+<', "$pgdata/$file_corrupt2";
seek($file, 4000, 0);
syswrite($file, '\0\0\0\0\0\0\0\0\0');
close $file;
system_or_bail 'pg_ctl', '-D', $pgdata, 'start';
$node->command_checks_all([ 'pg_basebackup', '-D', "$tempdir/backup_corrupt3"],
1,
@ -460,3 +470,6 @@ $node->command_checks_all([ 'pg_basebackup', '-D', "$tempdir/backup_corrupt3"],
$node->command_ok(
[ 'pg_basebackup', '-D', "$tempdir/backup_corrupt4", '-k' ],
'pg_basebackup with -k does not report checksum mismatch');
$node->safe_psql('postgres', "DROP TABLE corrupt1;");
$node->safe_psql('postgres', "DROP TABLE corrupt2;");