borgmatic/tests/end-to-end/test_database.py

import json
import os
import shutil
import subprocess
import sys
import tempfile

import pytest


def write_configuration(
    source_directory,
    config_path,
    repository_path,
    borgmatic_source_directory,
    postgresql_dump_format='custom',
    mongodb_dump_format='archive',
):
    '''
    Write out borgmatic configuration into a file at the config path. Set the options so as to work
    for testing. This includes injecting the given repository path, borgmatic source directory for
    storing database dumps, dump format (for PostgreSQL), and encryption passphrase.
    '''
    config = f'''
location:
    source_directories:
        - {source_directory}
    repositories:
        - {repository_path}
    borgmatic_source_directory: {borgmatic_source_directory}

storage:
    encryption_passphrase: "test"

hooks:
    postgresql_databases:
        - name: test
          hostname: postgresql
          username: postgres
          password: test
          format: {postgresql_dump_format}
        - name: all
          hostname: postgresql
          username: postgres
          password: test
        - name: all
          format: custom
          hostname: postgresql
          username: postgres
          password: test
    mysql_databases:
        - name: test
          hostname: mysql
          username: root
          password: test
        - name: all
          hostname: mysql
          username: root
          password: test
        - name: all
          format: sql
          hostname: mysql
          username: root
          password: test
    mongodb_databases:
        - name: test
          hostname: mongodb
          username: root
          password: test
          authentication_database: admin
          format: {mongodb_dump_format}
        - name: all
          hostname: mongodb
          username: root
          password: test
    sqlite_databases:
        - name: sqlite_test
          path: /tmp/sqlite_test.db
'''

    with open(config_path, 'w') as config_file:
        config_file.write(config)


def write_custom_restore_configuration(
    source_directory,
    config_path,
    repository_path,
    borgmatic_source_directory,
    postgresql_dump_format='custom',
    mongodb_dump_format='archive',
):
    '''
    Write out borgmatic configuration into a file at the config path. Set the options so as to work
    for testing with custom restore options. This includes a custom restore_hostname, restore_port,
    restore_username, restore_password and restore_path.
    '''
    config = f'''
location:
    source_directories:
        - {source_directory}
    repositories:
        - {repository_path}
    borgmatic_source_directory: {borgmatic_source_directory}

storage:
    encryption_passphrase: "test"

hooks:
    postgresql_databases:
        - name: test
          hostname: postgresql
          username: postgres
          password: test
          format: {postgresql_dump_format}
          restore_hostname: postgresql2
          restore_port: 5433
          restore_username: postgres2
          restore_password: test2
    mysql_databases:
        - name: test
          hostname: mysql
          username: root
          password: test
          restore_hostname: mysql2
          restore_port: 3307
          restore_username: root
          restore_password: test2
    mongodb_databases:
        - name: test
          hostname: mongodb
          username: root
          password: test
          authentication_database: admin
          format: {mongodb_dump_format}
          restore_hostname: mongodb2
          restore_port: 27018
          restore_username: root2
          restore_password: test2
    sqlite_databases:
        - name: sqlite_test
          path: /tmp/sqlite_test.db
          restore_path: /tmp/sqlite_test2.db
'''

    with open(config_path, 'w') as config_file:
        config_file.write(config)


def write_simple_custom_restore_configuration(
    source_directory,
    config_path,
    repository_path,
    borgmatic_source_directory,
    postgresql_dump_format='custom',
):
    '''
    Write out borgmatic configuration into a file at the config path. Set the options so as to work
    for testing with custom restore options, but this time using CLI arguments. This includes a
    custom restore_hostname, restore_port, restore_username and restore_password as we only test
    these options for PostgreSQL.
    '''
    config = f'''
location:
    source_directories:
        - {source_directory}
    repositories:
        - {repository_path}
    borgmatic_source_directory: {borgmatic_source_directory}

storage:
    encryption_passphrase: "test"

hooks:
    postgresql_databases:
        - name: test
          hostname: postgresql
          username: postgres
          password: test
          format: {postgresql_dump_format}
'''

    with open(config_path, 'w') as config_file:
        config_file.write(config)


def test_database_dump_and_restore():
    # Create a Borg repository.
    temporary_directory = tempfile.mkdtemp()
    repository_path = os.path.join(temporary_directory, 'test.borg')
    borgmatic_source_directory = os.path.join(temporary_directory, '.borgmatic')

    # Write out a special file to ensure that it gets properly excluded and Borg doesn't hang on it.
    os.mkfifo(os.path.join(temporary_directory, 'special_file'))

    original_working_directory = os.getcwd()

    try:
        config_path = os.path.join(temporary_directory, 'test.yaml')
        write_configuration(
            temporary_directory, config_path, repository_path, borgmatic_source_directory
        )

        subprocess.check_call(
            ['borgmatic', '-v', '2', '--config', config_path, 'rcreate', '--encryption', 'repokey']
        )

        # Run borgmatic to generate a backup archive including a database dump.
        subprocess.check_call(['borgmatic', 'create', '--config', config_path, '-v', '2'])

        # Get the created archive name.
        output = subprocess.check_output(
            ['borgmatic', '--config', config_path, 'list', '--json']
        ).decode(sys.stdout.encoding)
        parsed_output = json.loads(output)

        assert len(parsed_output) == 1
        assert len(parsed_output[0]['archives']) == 1
        archive_name = parsed_output[0]['archives'][0]['archive']

        # Restore the database from the archive.
        subprocess.check_call(
            ['borgmatic', '-v', '2', '--config', config_path, 'restore', '--archive', archive_name]
        )
    finally:
        os.chdir(original_working_directory)
        shutil.rmtree(temporary_directory)


def test_database_dump_and_restore_with_restore_cli_arguments():
    # Create a Borg repository.
    temporary_directory = tempfile.mkdtemp()
    repository_path = os.path.join(temporary_directory, 'test.borg')
    borgmatic_source_directory = os.path.join(temporary_directory, '.borgmatic')

    original_working_directory = os.getcwd()

    try:
        config_path = os.path.join(temporary_directory, 'test.yaml')
        write_simple_custom_restore_configuration(
            temporary_directory, config_path, repository_path, borgmatic_source_directory
        )

        subprocess.check_call(
            ['borgmatic', '-v', '2', '--config', config_path, 'rcreate', '--encryption', 'repokey']
        )

        # Run borgmatic to generate a backup archive including a database dump.
        subprocess.check_call(['borgmatic', 'create', '--config', config_path, '-v', '2'])

        # Get the created archive name.
        output = subprocess.check_output(
            ['borgmatic', '--config', config_path, 'list', '--json']
        ).decode(sys.stdout.encoding)
        parsed_output = json.loads(output)

        assert len(parsed_output) == 1
        assert len(parsed_output[0]['archives']) == 1
        archive_name = parsed_output[0]['archives'][0]['archive']

        # Restore the database from the archive.
        subprocess.check_call(
            [
                'borgmatic',
                '-v',
                '2',
                '--config',
                config_path,
                'restore',
                '--archive',
                archive_name,
                '--hostname',
                'postgresql2',
                '--port',
                '5433',
                '--username',
                'postgres2',
                '--password',
                'test2',
            ]
        )
    finally:
        os.chdir(original_working_directory)
        shutil.rmtree(temporary_directory)


def test_database_dump_and_restore_with_restore_configuration_options():
    # Create a Borg repository.
    temporary_directory = tempfile.mkdtemp()
    repository_path = os.path.join(temporary_directory, 'test.borg')
    borgmatic_source_directory = os.path.join(temporary_directory, '.borgmatic')

    original_working_directory = os.getcwd()

    try:
        config_path = os.path.join(temporary_directory, 'test.yaml')
        write_custom_restore_configuration(
            temporary_directory, config_path, repository_path, borgmatic_source_directory
        )

        subprocess.check_call(
            ['borgmatic', '-v', '2', '--config', config_path, 'rcreate', '--encryption', 'repokey']
        )

        # Run borgmatic to generate a backup archive including a database dump.
        subprocess.check_call(['borgmatic', 'create', '--config', config_path, '-v', '2'])

        # Get the created archive name.
        output = subprocess.check_output(
            ['borgmatic', '--config', config_path, 'list', '--json']
        ).decode(sys.stdout.encoding)
        parsed_output = json.loads(output)

        assert len(parsed_output) == 1
        assert len(parsed_output[0]['archives']) == 1
        archive_name = parsed_output[0]['archives'][0]['archive']

        # Restore the database from the archive.
        subprocess.check_call(
            ['borgmatic', '-v', '2', '--config', config_path, 'restore', '--archive', archive_name]
        )
    finally:
        os.chdir(original_working_directory)
        shutil.rmtree(temporary_directory)


def test_database_dump_and_restore_with_directory_format():
    # Create a Borg repository.
    temporary_directory = tempfile.mkdtemp()
    repository_path = os.path.join(temporary_directory, 'test.borg')
    borgmatic_source_directory = os.path.join(temporary_directory, '.borgmatic')

    original_working_directory = os.getcwd()

    try:
        config_path = os.path.join(temporary_directory, 'test.yaml')
        write_configuration(
            temporary_directory,
            config_path,
            repository_path,
            borgmatic_source_directory,
            postgresql_dump_format='directory',
            mongodb_dump_format='directory',
        )

        subprocess.check_call(
            ['borgmatic', '-v', '2', '--config', config_path, 'rcreate', '--encryption', 'repokey']
        )

        # Run borgmatic to generate a backup archive including a database dump.
        subprocess.check_call(['borgmatic', 'create', '--config', config_path, '-v', '2'])

        # Restore the database from the archive.
        subprocess.check_call(
            ['borgmatic', '--config', config_path, 'restore', '--archive', 'latest']
        )
    finally:
        os.chdir(original_working_directory)
        shutil.rmtree(temporary_directory)


def test_database_dump_with_error_causes_borgmatic_to_exit():
    # Create a Borg repository.
    temporary_directory = tempfile.mkdtemp()
    repository_path = os.path.join(temporary_directory, 'test.borg')
    borgmatic_source_directory = os.path.join(temporary_directory, '.borgmatic')

    original_working_directory = os.getcwd()

    try:
        config_path = os.path.join(temporary_directory, 'test.yaml')
        write_configuration(
            temporary_directory, config_path, repository_path, borgmatic_source_directory
        )

        subprocess.check_call(
            ['borgmatic', '-v', '2', '--config', config_path, 'rcreate', '--encryption', 'repokey']
        )

        # Run borgmatic with a config override such that the database dump fails.
        with pytest.raises(subprocess.CalledProcessError):
            subprocess.check_call(
                [
                    'borgmatic',
                    'create',
                    '--config',
                    config_path,
                    '-v',
                    '2',
                    '--override',
                    "hooks.postgresql_databases=[{'name': 'nope'}]",  # noqa: FS003
                ]
            )
    finally:
        os.chdir(original_working_directory)
        shutil.rmtree(temporary_directory)