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tutor/tests/commands/test_compose.py
Régis Behmo a2a3c022b8 fix: bind-mount in dev-specific services
The -m/--mount option makes it possible to bind-mount volumes at runtime. The
volumes are declared in a local/docker-compose.tmp.yml file. The problem with
this approach is when we want to bind-mount a volume to a service which is
specific to the dev context. For instance: the "learning" service when the MFE
plugin is enabled.

In such a case, starting the service triggers a call to `docker-compose stop`
in the local context. This call fails because the "learning" service does not
exist in the local context. Note that this issue only seems to occur with
docker-compose v1.

To resolve this issue, we create two additional filters for
the dev context, which emulate the behaviour of the local context. With this approach, we convert the -m/--mount arguments right after they are parsed. Because they are parsed just once, we can get rid of the de-duplication logic initially introduced with the COMPOSE_CLI_MOUNTS context.

Close #711. Close also https://github.com/overhangio/tutor-mfe/issues/57.
2022-07-29 19:53:02 +02:00

90 lines
3.6 KiB
Python

import typing as t
import unittest
from io import StringIO
from unittest.mock import patch
from click.exceptions import ClickException
from tutor import hooks
from tutor.commands import compose
from tutor.commands.local import LocalContext
class ComposeTests(unittest.TestCase):
maxDiff = None # Ensure we can see long diffs of YAML files.
def test_mount_option_parsing(self) -> None:
param = compose.MountParam()
self.assertEqual(
[("lms", "/path/to/edx-platform", "/openedx/edx-platform")],
param("lms:/path/to/edx-platform:/openedx/edx-platform"),
)
self.assertEqual(
[
("lms", "/path/to/edx-platform", "/openedx/edx-platform"),
("cms", "/path/to/edx-platform", "/openedx/edx-platform"),
],
param("lms,cms:/path/to/edx-platform:/openedx/edx-platform"),
)
self.assertEqual(
[
("lms", "/path/to/edx-platform", "/openedx/edx-platform"),
("cms", "/path/to/edx-platform", "/openedx/edx-platform"),
],
param("lms, cms:/path/to/edx-platform:/openedx/edx-platform"),
)
self.assertEqual(
[
("lms", "/path/to/edx-platform", "/openedx/edx-platform"),
("lms-worker", "/path/to/edx-platform", "/openedx/edx-platform"),
],
param("lms,lms-worker:/path/to/edx-platform:/openedx/edx-platform"),
)
with self.assertRaises(ClickException):
param("lms,:/path/to/edx-platform:/openedx/edx-platform")
@patch("sys.stdout", new_callable=StringIO)
def test_compose_local_tmp_generation(self, _mock_stdout: StringIO) -> None:
"""
Ensure that docker-compose.tmp.yml is correctly generated.
"""
param = compose.MountParam()
mount_args = (
# Auto-mounting of edx-platform to lms* and cms*
param.convert_implicit_form("/path/to/edx-platform"),
# Manual mounting of some other folder to mfe and lms
param.convert_explicit_form(
"mfe,lms:/path/to/something-else:/openedx/something-else"
),
)
# Mount volumes
compose.mount_tmp_volumes(mount_args, LocalContext(""))
compose_file: t.Dict[str, t.Any] = hooks.Filters.COMPOSE_LOCAL_TMP.apply({})
actual_services: t.Dict[str, t.Any] = compose_file["services"]
expected_services: t.Dict[str, t.Any] = {
"cms": {"volumes": ["/path/to/edx-platform:/openedx/edx-platform"]},
"cms-worker": {"volumes": ["/path/to/edx-platform:/openedx/edx-platform"]},
"lms": {
"volumes": [
"/path/to/edx-platform:/openedx/edx-platform",
"/path/to/something-else:/openedx/something-else",
]
},
"lms-worker": {"volumes": ["/path/to/edx-platform:/openedx/edx-platform"]},
"mfe": {"volumes": ["/path/to/something-else:/openedx/something-else"]},
}
self.assertEqual(actual_services, expected_services)
compose_jobs_file: t.Dict[
str, t.Any
] = hooks.Filters.COMPOSE_LOCAL_JOBS_TMP.apply({})
actual_jobs_services: t.Dict[str, t.Any] = compose_jobs_file["services"]
expected_jobs_services: t.Dict[str, t.Any] = {
"cms-job": {"volumes": ["/path/to/edx-platform:/openedx/edx-platform"]},
"lms-job": {"volumes": ["/path/to/edx-platform:/openedx/edx-platform"]},
}
self.assertEqual(actual_jobs_services, expected_jobs_services)