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81c8189a84
Previously, a failed backup would always overwrite ${db}.sql.gz,
because the bash `>` redirect truncates the file; even if the
backup was going to fail.
On the next run, the ${db}.prev.sql.gz backup would be
overwritten by the bad ${db}.sql.gz.
Now, if the backup fails, the ${db}.in-progress.sql.gz is in an
unknown state, but ${db}.sql.gz will not be written.
On the next run, ${db}.prev.sql.gz (our only good backup) will
not be overwritten because ${db}.sql.gz does not exist.
113 lines
3.9 KiB
Nix
113 lines
3.9 KiB
Nix
{ system ? builtins.currentSystem,
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config ? {},
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pkgs ? import ../.. { inherit system config; }
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}:
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with import ../lib/testing-python.nix { inherit system pkgs; };
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with pkgs.lib;
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let
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postgresql-versions = import ../../pkgs/servers/sql/postgresql pkgs;
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test-sql = pkgs.writeText "postgresql-test" ''
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CREATE EXTENSION pgcrypto; -- just to check if lib loading works
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CREATE TABLE sth (
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id int
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);
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INSERT INTO sth (id) VALUES (1);
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INSERT INTO sth (id) VALUES (1);
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INSERT INTO sth (id) VALUES (1);
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INSERT INTO sth (id) VALUES (1);
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INSERT INTO sth (id) VALUES (1);
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CREATE TABLE xmltest ( doc xml );
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INSERT INTO xmltest (doc) VALUES ('<test>ok</test>'); -- check if libxml2 enabled
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'';
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make-postgresql-test = postgresql-name: postgresql-package: backup-all: makeTest {
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name = postgresql-name;
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meta = with pkgs.lib.maintainers; {
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maintainers = [ zagy ];
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};
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machine = {...}:
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{
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services.postgresql = {
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enable = true;
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package = postgresql-package;
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};
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services.postgresqlBackup = {
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enable = true;
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databases = optional (!backup-all) "postgres";
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};
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};
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testScript = let
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backupName = if backup-all then "all" else "postgres";
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backupService = if backup-all then "postgresqlBackup" else "postgresqlBackup-postgres";
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in ''
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def check_count(statement, lines):
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return 'test $(sudo -u postgres psql postgres -tAc "{}"|wc -l) -eq {}'.format(
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statement, lines
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)
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machine.start()
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machine.wait_for_unit("postgresql")
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with subtest("Postgresql is available just after unit start"):
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machine.succeed(
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"cat ${test-sql} | sudo -u postgres psql"
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)
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with subtest("Postgresql survives restart (bug #1735)"):
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machine.shutdown()
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time.sleep(2)
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machine.start()
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machine.wait_for_unit("postgresql")
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machine.fail(check_count("SELECT * FROM sth;", 3))
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machine.succeed(check_count("SELECT * FROM sth;", 5))
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machine.fail(check_count("SELECT * FROM sth;", 4))
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machine.succeed(check_count("SELECT xpath('/test/text()', doc) FROM xmltest;", 1))
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with subtest("Backup service works"):
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machine.succeed(
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"systemctl start ${backupService}.service",
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"zcat /var/backup/postgresql/${backupName}.sql.gz | grep '<test>ok</test>'",
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"ls -hal /var/backup/postgresql/ >/dev/console",
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"stat -c '%a' /var/backup/postgresql/${backupName}.sql.gz | grep 600",
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)
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with subtest("Backup service fails gracefully"):
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# Sabotage the backup process
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machine.succeed("rm /run/postgresql/.s.PGSQL.5432")
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machine.fail(
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"systemctl start ${backupService}.service",
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)
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machine.succeed(
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"ls -hal /var/backup/postgresql/ >/dev/console",
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"zcat /var/backup/postgresql/${backupName}.prev.sql.gz | grep '<test>ok</test>'",
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"stat /var/backup/postgresql/${backupName}.in-progress.sql.gz",
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)
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# In a previous version, the second run would overwrite prev.sql.gz,
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# so we test a second run as well.
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machine.fail(
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"systemctl start ${backupService}.service",
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)
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machine.succeed(
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"stat /var/backup/postgresql/${backupName}.in-progress.sql.gz",
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"zcat /var/backup/postgresql/${backupName}.prev.sql.gz | grep '<test>ok</test>'",
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)
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with subtest("Initdb works"):
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machine.succeed("sudo -u postgres initdb -D /tmp/testpostgres2")
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machine.shutdown()
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'';
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};
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in
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(mapAttrs' (name: package: { inherit name; value=make-postgresql-test name package false;}) postgresql-versions) // {
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postgresql_11-backup-all = make-postgresql-test "postgresql_11-backup-all" postgresql-versions.postgresql_11 true;
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}
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