124 lines
4.5 KiB
Nix
124 lines
4.5 KiB
Nix
{ system ? builtins.currentSystem,
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config ? {},
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pkgs ? import ../.. { inherit system config; },
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package ? null
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}:
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with import ../lib/testing-python.nix { inherit system pkgs; };
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let
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lib = pkgs.lib;
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# Makes a test for a PostgreSQL package, given by name and looked up from `pkgs`.
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makeTestAttribute = name:
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{
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inherit name;
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value = makePostgresqlWalReceiverTest pkgs."${name}";
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};
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makePostgresqlWalReceiverTest = pkg:
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let
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postgresqlDataDir = "/var/lib/postgresql/${pkg.psqlSchema}";
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replicationUser = "wal_receiver_user";
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replicationSlot = "wal_receiver_slot";
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replicationConn = "postgresql://${replicationUser}@localhost";
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baseBackupDir = "/var/cache/wals/pg_basebackup";
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walBackupDir = "/var/cache/wals/pg_wal";
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recoveryFile = pkgs.writeTextDir "recovery.signal" "";
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in makeTest {
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name = "postgresql-wal-receiver-${pkg.name}";
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meta.maintainers = with lib.maintainers; [ pacien ];
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nodes.machine = { ... }: {
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systemd.tmpfiles.rules = [
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"d /var/cache/wals 0750 postgres postgres - -"
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];
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services.postgresql = {
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package = pkg;
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enable = true;
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settings = {
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max_replication_slots = 10;
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max_wal_senders = 10;
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recovery_end_command = "touch recovery.done";
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restore_command = "cp ${walBackupDir}/%f %p";
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wal_level = "archive"; # alias for replica on pg >= 9.6
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};
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authentication = ''
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host replication ${replicationUser} all trust
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'';
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initialScript = pkgs.writeText "init.sql" ''
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create user ${replicationUser} replication;
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select * from pg_create_physical_replication_slot('${replicationSlot}');
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'';
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};
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services.postgresqlWalReceiver.receivers.main = {
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postgresqlPackage = pkg;
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connection = replicationConn;
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slot = replicationSlot;
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directory = walBackupDir;
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};
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# This is only to speedup test, it isn't time racing. Service is set to autorestart always,
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# default 60sec is fine for real system, but is too much for a test
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systemd.services.postgresql-wal-receiver-main.serviceConfig.RestartSec = lib.mkForce 5;
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systemd.services.postgresql.serviceConfig.ReadWritePaths = [ "/var/cache/wals" ];
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};
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testScript = ''
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# make an initial base backup
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machine.wait_for_unit("postgresql")
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machine.wait_for_unit("postgresql-wal-receiver-main")
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# WAL receiver healthchecks PG every 5 seconds, so let's be sure they have connected each other
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# required only for 9.4
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machine.sleep(5)
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machine.succeed(
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"${pkg}/bin/pg_basebackup --dbname=${replicationConn} --pgdata=${baseBackupDir}"
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)
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# create a dummy table with 100 records
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machine.succeed(
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"sudo -u postgres psql --command='create table dummy as select * from generate_series(1, 100) as val;'"
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)
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# stop postgres and destroy data
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machine.systemctl("stop postgresql")
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machine.systemctl("stop postgresql-wal-receiver-main")
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machine.succeed("rm -r ${postgresqlDataDir}/{base,global,pg_*}")
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# restore the base backup
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machine.succeed(
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"cp -r ${baseBackupDir}/* ${postgresqlDataDir} && chown postgres:postgres -R ${postgresqlDataDir}"
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)
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# prepare WAL and recovery
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machine.succeed("chmod a+rX -R ${walBackupDir}")
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machine.execute(
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"for part in ${walBackupDir}/*.partial; do mv $part ''${part%%.*}; done"
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) # make use of partial segments too
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machine.succeed(
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"cp ${recoveryFile}/* ${postgresqlDataDir}/ && chmod 666 ${postgresqlDataDir}/recovery*"
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)
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# replay WAL
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machine.systemctl("start postgresql")
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machine.wait_for_file("${postgresqlDataDir}/recovery.done")
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machine.systemctl("restart postgresql")
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machine.wait_for_unit("postgresql")
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# check that our records have been restored
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machine.succeed(
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"test $(sudo -u postgres psql --pset='pager=off' --tuples-only --command='select count(distinct val) from dummy;') -eq 100"
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)
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'';
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};
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in
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if package == null then
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# all-tests.nix: Maps the generic function over all attributes of PostgreSQL packages
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builtins.listToAttrs (map makeTestAttribute (builtins.attrNames (import ../../pkgs/servers/sql/postgresql pkgs)))
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else
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# Called directly from <package>.tests
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makePostgresqlWalReceiverTest package
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