pg_probackup/tests/archive.py

import os
import unittest
from .helpers.ptrack_helpers import ProbackupTest, ProbackupException, archive_script
from datetime import datetime, timedelta
import subprocess
from sys import exit
from time import sleep


module_name = 'archive'


class ArchiveTest(ProbackupTest, unittest.TestCase):

    # @unittest.expectedFailure
    # @unittest.skip("skip")
    def test_pgpro434_1(self):
        """Description in jira issue PGPRO-434"""
        fname = self.id().split('.')[3]
        backup_dir = os.path.join(self.tmp_path, module_name, fname, 'backup')
        node = self.make_simple_node(base_dir="{0}/{1}/node".format(module_name, fname),
            set_replication=True,
            initdb_params=['--data-checksums'],
            pg_options={'wal_level': 'replica', 'max_wal_senders': '2', 'checkpoint_timeout': '30s'}
            )
        self.init_pb(backup_dir)
        self.add_instance(backup_dir, 'node', node)
        self.set_archiving(backup_dir, 'node', node)
        # force more frequent wal switch
        node.append_conf('postgresql.auto.conf', 'archive_timeout  = 30')
        node.start()

        node.safe_psql(
            "postgres",
            "create table t_heap as select 1 as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(0,100) i")

        result = node.safe_psql("postgres", "SELECT * FROM t_heap")
        self.backup_node(backup_dir, 'node', node)
        node.cleanup()

        self.restore_node(backup_dir, 'node', node)
        node.start()

        # Recreate backup calagoue
        self.init_pb(backup_dir)
        self.add_instance(backup_dir, 'node', node)

        # Make backup
        self.backup_node(backup_dir, 'node', node)
        node.cleanup()

        # Restore Database
        self.restore_node(backup_dir, 'node', node)
        node.start()

        self.assertEqual(result, node.safe_psql("postgres", "SELECT * FROM t_heap"),
            'data after restore not equal to original data')
        # Clean after yourself
        self.del_test_dir(module_name, fname)

    # @unittest.skip("skip")
    def test_pgpro434_2(self):
        """Check that timelines are correct"""
        fname = self.id().split('.')[3]
        backup_dir = os.path.join(self.tmp_path, module_name, fname, 'backup')
        node = self.make_simple_node(base_dir="{0}/{1}/node".format(module_name, fname),
            set_replication=True,
            initdb_params=['--data-checksums'],
            pg_options={'wal_level': 'replica', 'max_wal_senders': '2', 'checkpoint_timeout': '30s'}
            )
        self.init_pb(backup_dir)
        self.add_instance(backup_dir, 'node', node)
        self.set_archiving(backup_dir, 'node', node)
        node.start()

        # FIRST TIMELINE
        node.safe_psql(
            "postgres",
            "create table t_heap as select 1 as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(0,100) i")
        backup_id = self.backup_node(backup_dir, 'node', node)
        recovery_time = self.show_pb(backup_dir, 'node', backup_id)["recovery-time"]
        node.safe_psql(
            "postgres",
            "insert into t_heap select 100501 as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(0,256) i")

        # SECOND TIMELIN
        node.cleanup()
        self.restore_node(backup_dir, 'node', node, options=["--time={0}".format(recovery_time)])
        node.start()
        if self.verbose:
            print('Second timeline')
            print(node.safe_psql("postgres","select redo_wal_file from pg_control_checkpoint()"))
        node.safe_psql(
            "postgres",
            "insert into t_heap select 2 as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(100,200) i")
        backup_id = self.backup_node(backup_dir, 'node', node)
        recovery_time = self.show_pb(backup_dir, 'node', backup_id)["recovery-time"]
        node.safe_psql(
            "postgres",
            "insert into t_heap select 100502 as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(0,256) i")

        # THIRD TIMELINE
        node.cleanup()
        self.restore_node(backup_dir, 'node', node, options=["--time={0}".format(recovery_time)])
        node.start()
        if self.verbose:
            print('third timeline')
            print(node.safe_psql("postgres","select redo_wal_file from pg_control_checkpoint()"))
        node.safe_psql(
            "postgres",
            "insert into t_heap select 3 as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(200,300) i")
        backup_id = self.backup_node(backup_dir, 'node', node)
        recovery_time = self.show_pb(backup_dir, 'node', backup_id)["recovery-time"]
        result = node.safe_psql("postgres", "SELECT * FROM t_heap")
        node.safe_psql(
            "postgres",
            "insert into t_heap select 100503 as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(0,256) i")

        # FOURTH TIMELINE
        node.cleanup()
        self.restore_node(backup_dir, 'node', node, options=["--time={0}".format(recovery_time)])
        node.start()
        if self.verbose:
            print('Fourth timeline')
            print(node.safe_psql("postgres","select redo_wal_file from pg_control_checkpoint()"))

        # FIFTH TIMELINE
        node.cleanup()
        self.restore_node(backup_dir, 'node', node, options=["--time={0}".format(recovery_time)])
        node.start()
        if self.verbose:
            print('Fifth timeline')
            print(node.safe_psql("postgres","select redo_wal_file from pg_control_checkpoint()"))

        # SIXTH TIMELINE
        node.cleanup()
        self.restore_node(backup_dir, 'node', node, options=["--time={0}".format(recovery_time)])
        node.start()
        if self.verbose:
            print('Sixth timeline')
            print(node.safe_psql("postgres","select redo_wal_file from pg_control_checkpoint()"))

        self.assertFalse(node.execute("postgres","select exists(select 1 from t_heap where id > 100500)")[0][0],
            'data after restore not equal to original data')

        self.assertEqual(result, node.safe_psql("postgres", "SELECT * FROM t_heap"),
            'data after restore not equal to original data')

        # Clean after yourself
        # self.del_test_dir(module_name, fname)

    # @unittest.skip("skip")
    def test_pgpro434_3(self):
        """Check pg_stop_backup_timeout"""
        fname = self.id().split('.')[3]
        backup_dir = os.path.join(self.tmp_path, module_name, fname, 'backup')
        node = self.make_simple_node(base_dir="{0}/{1}/node".format(module_name, fname),
            set_replication=True,
            initdb_params=['--data-checksums'],
            pg_options={'wal_level': 'replica', 'max_wal_senders': '2', 'checkpoint_timeout': '30s'}
            )
        self.init_pb(backup_dir)
        self.add_instance(backup_dir, 'node', node)
        self.set_archiving(backup_dir, 'node', node)

        archive_script = os.path.join(backup_dir,'archive_script.sh')
        with open(archive_script, 'w+') as f:
            f.write(archive_script.format(backup_dir=backup_dir, node_name='node', count_limit=2))

        st = os.stat(archive_script)
        os.chmod(archive_script, st.st_mode | 0o111)
        node.append_conf('postgresql.auto.conf', "archive_command  = '{0} %p %f'".format(archive_script))
        node.start()
        try:
            self.backup_node(backup_dir, 'node', node, options=["--stream"])
            # we should die here because exception is what we expect to happen
            self.assertEqual(1, 0, "Expecting Error because pg_stop_backup failed to answer.\n Output: {0} \n CMD: {1}".format(
                repr(self.output), self.cmd))
        except ProbackupException as e:
            self.assertTrue("ERROR: pg_stop_backup doesn't answer" in e.message
                and "cancel it" in e.message,
                '\n Unexpected Error Message: {0}\n CMD: {1}'.format(repr(e.message), self.cmd))

        # Clean after yourself
        self.del_test_dir(module_name, fname)

    # @unittest.skip("skip")
    def test_arhive_push_file_exists(self):
        """Archive-push if file exists"""
        fname = self.id().split('.')[3]
        backup_dir = os.path.join(self.tmp_path, module_name, fname, 'backup')
        node = self.make_simple_node(base_dir="{0}/{1}/node".format(module_name, fname),
            set_replication=True,
            initdb_params=['--data-checksums'],
            pg_options={'wal_level': 'replica', 'max_wal_senders': '2', 'checkpoint_timeout': '30s', 'archive_timeout': '1'}
            )
        self.init_pb(backup_dir)
        self.add_instance(backup_dir, 'node', node)
        self.set_archiving(backup_dir, 'node', node)

        wals_dir = os.path.join(backup_dir, 'wal', 'node')
        file = os.path.join(wals_dir, '000000010000000000000001')
        with open(file, 'a') as f:
            pass
        node.start()
        node.safe_psql(
            "postgres",
            "create table t_heap as select i as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(0,100500) i")
        log_file = os.path.join(node.logs_dir, 'postgresql.log')
        with open(log_file, 'r') as f:
            log_content = f.read()
            self.assertTrue('LOG:  archive command failed with exit code 1' in log_content
             and 'DETAIL:  The failed archive command was:' in log_content
             and 'INFO: pg_probackup archive-push from' in log_content
             and "ERROR: file '{0}', already exists.".format(file) in log_content,
             'Expecting error messages about failed archive_command'
            )
            self.assertFalse('pg_probackup archive-push completed successfully' in log_content)

        os.remove(file)
        sleep(5)
        node.safe_psql('postgres', 'select pg_switch_xlog()')

        with open(log_file, 'r') as f:
            log_content = f.read()
            self.assertTrue('pg_probackup archive-push completed successfully' in log_content,
             'Expecting messages about successfull execution archive_command')

        # Clean after yourself
        self.del_test_dir(module_name, fname)

    @unittest.expectedFailure
    def test_replica_archive(self):
        """make node withput archiving, take stream backup and turn it into replica, set replica with archiving, make archive backup from replica"""
        fname = self.id().split('.')[3]
        backup_dir = os.path.join(self.tmp_path, module_name, fname, 'backup')
        master = self.make_simple_node(base_dir="{0}/{1}/master".format(module_name, fname),
            set_replication=True,
            initdb_params=['--data-checksums'],
            pg_options={'wal_level': 'replica', 'max_wal_senders': '2', 'checkpoint_timeout': '30s'}
            )
        self.init_pb(backup_dir)
        self.add_instance(backup_dir, 'master', master)
        # force more frequent wal switch
        master.start()

        replica = self.make_simple_node(base_dir="{0}/{1}/replica".format(module_name, fname))
        replica.cleanup()

        master.psql(
            "postgres",
            "create table t_heap as select i as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(0,256) i")

        self.backup_node(backup_dir, 'master', master, options=['--stream'])
        before = master.safe_psql("postgres", "SELECT * FROM t_heap")

        # Settings for Replica
        self.restore_node(backup_dir, 'master', replica)
        self.set_replica(master, replica)
        self.set_archiving(backup_dir, 'replica', replica, replica=True)
        replica.start({"-t": "600"})

        # Check data correctness on replica
        after = replica.safe_psql("postgres", "SELECT * FROM t_heap")
        self.assertEqual(before, after)

        # Change data on master, take FULL backup from replica, restore taken backup and check that restored data equal to original data
        master.psql(
            "postgres",
            "insert into t_heap as select i as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(256,512) i")
        before = master.safe_psql("postgres", "SELECT * FROM t_heap")
        self.add_instance(backup_dir, 'replica', replica)
        backup_id = self.backup_node(backup_dir, 'replica', replica, options=['--archive-timeout=30',
            '--master-host=localhost', '--master-db=postgres','--master-port={0}'.format(master.port)])
        self.validate_pb(backup_dir, 'replica')
        self.assertEqual('OK', self.show_pb(backup_dir, 'replica', backup_id)['status'])

        # RESTORE FULL BACKUP TAKEN FROM replica
        node = self.make_simple_node(base_dir="{0}/{1}/node".format(module_name, fname))
        node.cleanup()
        self.restore_node(backup_dir, 'replica', data_dir=node.data_dir)
        node.append_conf('postgresql.auto.conf', 'port = {0}'.format(node.port))
        node.start({"-t": "600"})
        # CHECK DATA CORRECTNESS
        after = node.safe_psql("postgres", "SELECT * FROM t_heap")
        self.assertEqual(before, after)

        # Change data on master, make PAGE backup from replica, restore taken backup and check that restored data equal to original data
        master.psql(
            "postgres",
            "insert into t_heap as select i as id, md5(i::text) as text, md5(repeat(i::text,10))::tsvector as tsvector from generate_series(512,768) i")
        before = master.safe_psql("postgres", "SELECT * FROM t_heap")
        backup_id = self.backup_node(backup_dir, 'replica', replica, backup_type='page', options=['--archive-timeout=30',
            '--master-host=localhost', '--master-db=postgres','--master-port={0}'.format(master.port)])
        self.validate_pb(backup_dir, 'replica')
        self.assertEqual('OK', self.show_pb(backup_dir, 'replica', backup_id)['status'])

        # RESTORE PAGE BACKUP TAKEN FROM replica
        node.cleanup()
        self.restore_node(backup_dir, 'replica', data_dir=node.data_dir, backup_id=backup_id)
        node.append_conf('postgresql.auto.conf', 'port = {0}'.format(node.port))
        node.start({"-t": "600"})
        # CHECK DATA CORRECTNESS
        after = node.safe_psql("postgres", "SELECT * FROM t_heap")
        self.assertEqual(before, after)

        # Clean after yourself
        self.del_test_dir(module_name, fname)