def test_docker_agent_is_named_volume_win32(monkeypatch, cloud_api, path,
result):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
monkeypatch.setattr("prefect.agent.docker.agent.platform", "win32")
agent = DockerAgent()
assert agent._is_named_volume_win32(path) == result
def test_docker_agent_parse_volume_spec_raises_on_invalid_spec(
monkeypatch, cloud_api, candidate, exception_type):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
with pytest.raises(exception_type):
agent._parse_volume_spec([candidate])
def test_docker_agent_is_named_volume_unix(monkeypatch, runner_token, path,
result):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
monkeypatch.setattr("prefect.agent.docker.agent.platform", "osx")
agent = DockerAgent()
assert agent._is_named_volume_unix(path) == result
def test_docker_agent_shutdown_terminates_child_processes(
monkeypatch, runner_token):
monkeypatch.setattr("prefect.agent.agent.Client", MagicMock())
api = MagicMock()
api.ping.return_value = True
api.create_container.return_value = {"Id": "container_id"}
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient",
MagicMock(return_value=api))
proc = MagicMock(is_alive=MagicMock(return_value=True))
agent = DockerAgent(show_flow_logs=True)
agent.processes = [proc]
agent.on_shutdown()
assert proc.is_alive.called
assert proc.terminate.called
def test_populate_env_vars_includes_agent_labels(monkeypatch, cloud_api):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
with set_temporary_config({
"cloud.agent.auth_token": "token",
"cloud.api": "api",
"logging.log_to_cloud": True,
}):
agent = DockerAgent(labels=["42", "marvin"])
env_vars = agent.populate_env_vars(
GraphQLResult({
"id": "id",
"name": "name",
"flow": {
"id": "foo"
}
}))
expected_vars = {
"PREFECT__CLOUD__API":
"api",
"PREFECT__CLOUD__AGENT__LABELS":
"['42', 'marvin']",
"PREFECT__CLOUD__AUTH_TOKEN":
"token",
"PREFECT__CONTEXT__FLOW_RUN_ID":
"id",
"PREFECT__CONTEXT__FLOW_ID":
"foo",
"PREFECT__CLOUD__USE_LOCAL_SECRETS":
"false",
"PREFECT__LOGGING__LOG_TO_CLOUD":
"true",
"PREFECT__LOGGING__LEVEL":
"INFO",
"PREFECT__ENGINE__FLOW_RUNNER__DEFAULT_CLASS":
"prefect.engine.cloud.CloudFlowRunner",
"PREFECT__ENGINE__TASK_RUNNER__DEFAULT_CLASS":
"prefect.engine.cloud.CloudTaskRunner",
}
assert env_vars == expected_vars
def test_docker_agent_init(monkeypatch, runner_token):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
agent = DockerAgent()
assert agent
assert agent.labels == []
assert agent.name == "agent"
def test_docker_agent_ping(monkeypatch, runner_token):
api = MagicMock()
api.ping.return_value = True
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient",
MagicMock(return_value=api))
agent = DockerAgent()
assert api.ping.called
def test_docker_agent_ping_exception(monkeypatch, runner_token):
api = MagicMock()
api.ping.return_value = True
api.ping.side_effect = Exception()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient",
MagicMock(return_value=api))
with pytest.raises(Exception):
agent = DockerAgent()
def test_docker_agent_heartbeat_exits_on_failure(monkeypatch, runner_token,
caplog):
api = MagicMock()
api.ping.return_value = True
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient",
MagicMock(return_value=api))
agent = DockerAgent()
api.ping.return_value = False
agent.heartbeat()
agent.heartbeat()
agent.heartbeat()
agent.heartbeat()
agent.heartbeat()
with pytest.raises(SystemExit):
agent.heartbeat()
assert "Cannot reconnect to Docker daemon. Agent is shutting down." in caplog.text
assert api.ping.call_count == 7
def test_populate_env_vars_is_responsive_to_logging_config(
monkeypatch, runner_token, flag):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
with set_temporary_config({
"cloud.agent.auth_token": "token",
"cloud.api": "api",
"logging.log_to_cloud": flag,
}):
agent = DockerAgent(labels=["42", "marvin"])
env_vars = agent.populate_env_vars(
GraphQLResult({
"id": "id",
"name": "name"
}))
assert env_vars["PREFECT__LOGGING__LOG_TO_CLOUD"] == str(flag).lower()
def test_populate_env_vars_uses_user_provided_env_vars(monkeypatch,
runner_token):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
with set_temporary_config({
"cloud.agent.auth_token": "token",
"cloud.api": "api",
"logging.log_to_cloud": True,
}):
agent = DockerAgent(env_vars=dict(AUTH_THING="foo"))
env_vars = agent.populate_env_vars(
GraphQLResult({
"id": "id",
"name": "name"
}))
assert env_vars["AUTH_THING"] == "foo"
def test_docker_agent_config_options_populated(monkeypatch, runner_token):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
with set_temporary_config({"cloud.agent.auth_token": "TEST_TOKEN"}):
agent = DockerAgent(base_url="url", no_pull=True)
assert agent.client.get_auth_token() == "TEST_TOKEN"
assert agent.logger
assert agent.no_pull
assert api.call_args[1]["base_url"] == "url"
def test_docker_agent_ping(monkeypatch, cloud_api):
api = MagicMock()
api.ping.return_value = True
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
assert api.ping.called
def test_docker_agent_deploy_flow_uses_environment_metadata(
monkeypatch, cloud_api):
api = MagicMock()
api.ping.return_value = True
api.create_container.return_value = {"Id": "container_id"}
api.create_host_config.return_value = {"AutoRemove": True}
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
agent.deploy_flow(flow_run=GraphQLResult({
"flow":
GraphQLResult({
"id":
"foo",
"storage":
Local().serialize(),
"environment":
LocalEnvironment(metadata={
"image": "repo/name:tag"
}).serialize(),
"core_version":
"0.13.0",
}),
"id":
"id",
"name":
"name",
}))
assert api.pull.called
assert api.create_container.called
assert api.start.called
assert api.create_host_config.call_args[1]["auto_remove"] is True
assert api.create_container.call_args[1][
"command"] == "prefect execute flow-run"
assert api.create_container.call_args[1]["host_config"][
"AutoRemove"] is True
assert api.start.call_args[1]["container"] == "container_id"
def test_docker_agent_ping_exception(monkeypatch, cloud_api):
api = MagicMock()
api.ping.return_value = True
api.ping.side_effect = Exception()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
with pytest.raises(Exception):
agent = DockerAgent()
def test_docker_agent_parse_volume_spec_win(monkeypatch, cloud_api, candidate,
named_volumes,
container_mount_paths, host_spec):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
(
actual_named_volumes,
actual_container_mount_paths,
actual_host_spec,
) = agent._parse_volume_spec_win32(candidate)
assert actual_named_volumes == named_volumes
assert actual_container_mount_paths == container_mount_paths
assert actual_host_spec == host_spec
def test_docker_agent_daemon_url_responds_to_system(monkeypatch, runner_token):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
monkeypatch.setattr("prefect.agent.docker.agent.platform", "win32")
with set_temporary_config({"cloud.agent.auth_token": "TEST_TOKEN"}):
agent = DockerAgent()
assert agent.client.get_auth_token() == "TEST_TOKEN"
assert agent.logger
assert not agent.no_pull
assert api.call_args[1]["base_url"] == "npipe:////./pipe/docker_engine"
def test_docker_agent_init(monkeypatch, cloud_api):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
assert agent
assert agent.labels == []
assert agent.name == "agent"
def test_docker_agent_deploy_flow_storage_raises(monkeypatch, runner_token):
monkeypatch.setattr("prefect.agent.agent.Client", MagicMock())
api = MagicMock()
api.ping.return_value = True
api.create_container.return_value = {"Id": "container_id"}
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient",
MagicMock(return_value=api))
agent = DockerAgent()
with pytest.raises(ValueError):
agent.deploy_flow(flow_run=GraphQLResult(
{
"flow": GraphQLResult({"storage": Local().serialize()}),
"id": "id",
"name": "name",
"version": "version",
}))
assert not api.pull.called
def test_docker_agent_no_pull(monkeypatch, runner_token):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
agent = DockerAgent()
assert not agent.no_pull
agent = DockerAgent(no_pull=True)
assert agent.no_pull
with context(no_pull=True):
agent = DockerAgent()
assert agent.no_pull
with context(no_pull=False):
agent = DockerAgent(no_pull=True)
assert agent.no_pull
with context(no_pull=False):
agent = DockerAgent(no_pull=False)
assert not agent.no_pull
def test_docker_agent_config_options(monkeypatch, runner_token):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
monkeypatch.setattr("prefect.agent.docker.agent.platform", "osx")
with set_temporary_config({"cloud.agent.auth_token": "TEST_TOKEN"}):
agent = DockerAgent(name="test")
assert agent.name == "test"
assert agent.client.get_auth_token() == "TEST_TOKEN"
assert agent.logger
assert not agent.no_pull
assert api.call_args[1]["base_url"] == "unix://var/run/docker.sock"
def test_docker_agent_init_volume_empty_options(monkeypatch, cloud_api):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
assert agent
assert agent.named_volumes == []
assert agent.container_mount_paths == []
assert agent.host_spec == {}
def test_docker_agent_deploy_flow_reg_allow_list_not_allowed(
monkeypatch, cloud_api):
api = MagicMock()
api.ping.return_value = True
api.create_container.return_value = {"Id": "container_id"}
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent(reg_allow_list=["test1"])
with pytest.raises(ValueError) as error:
agent.deploy_flow(flow_run=GraphQLResult({
"flow":
GraphQLResult({
"id":
"foo",
"storage":
Docker(registry_url="test2",
image_name="name",
image_tag="tag").serialize(),
"environment":
LocalEnvironment().serialize(),
"core_version":
"0.13.0",
}),
"id":
"id",
"name":
"name",
}))
expected_error = ("Trying to pull image from a Docker registry 'test2'"
" which is not in the reg_allow_list")
assert not api.pull.called
assert not api.create_container.called
assert not api.start.called
assert str(error.value) == expected_error
def test_docker_agent_deploy_flow(core_version, command, monkeypatch,
cloud_api):
api = MagicMock()
api.ping.return_value = True
api.create_container.return_value = {"Id": "container_id"}
api.create_host_config.return_value = {"AutoRemove": True}
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
agent.deploy_flow(flow_run=GraphQLResult({
"flow":
GraphQLResult({
"id":
"foo",
"storage":
Docker(registry_url="test", image_name="name",
image_tag="tag").serialize(),
"environment":
LocalEnvironment().serialize(),
"core_version":
core_version,
}),
"id":
"id",
"name":
"name",
}))
assert api.pull.called
assert api.create_container.called
assert api.start.called
assert api.create_host_config.call_args[1]["auto_remove"] is True
assert api.create_container.call_args[1]["command"] == command
assert api.create_container.call_args[1]["host_config"][
"AutoRemove"] is True
assert api.start.call_args[1]["container"] == "container_id"
def test_populate_env_vars(monkeypatch, runner_token):
api = MagicMock()
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient", api)
with set_temporary_config({
"cloud.agent.auth_token": "token",
"cloud.api": "api",
"logging.log_to_cloud": True,
}):
agent = DockerAgent()
env_vars = agent.populate_env_vars(
GraphQLResult({
"id": "id",
"name": "name"
}))
expected_vars = {
"PREFECT__CLOUD__API":
"api",
"PREFECT__CLOUD__AUTH_TOKEN":
"token",
"PREFECT__CLOUD__AGENT__LABELS":
"[]",
"PREFECT__CONTEXT__FLOW_RUN_ID":
"id",
"PREFECT__CLOUD__USE_LOCAL_SECRETS":
"false",
"PREFECT__LOGGING__LOG_TO_CLOUD":
"true",
"PREFECT__LOGGING__LEVEL":
"DEBUG",
"PREFECT__ENGINE__FLOW_RUNNER__DEFAULT_CLASS":
"prefect.engine.cloud.CloudFlowRunner",
"PREFECT__ENGINE__TASK_RUNNER__DEFAULT_CLASS":
"prefect.engine.cloud.CloudTaskRunner",
}
assert env_vars == expected_vars
def test_docker_agent_deploy_flow_show_flow_logs(monkeypatch, cloud_api):
process = MagicMock()
monkeypatch.setattr("multiprocessing.Process", process)
api = MagicMock()
api.ping.return_value = True
api.create_container.return_value = {"Id": "container_id"}
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent(show_flow_logs=True)
agent.deploy_flow(flow_run=GraphQLResult({
"flow":
GraphQLResult({
"id":
"foo",
"storage":
Docker(registry_url="test", image_name="name",
image_tag="tag").serialize(),
"environment":
LocalEnvironment().serialize(),
"core_version":
"0.13.0",
}),
"id":
"id",
"name":
"name",
}))
process.assert_called_with(target=agent.stream_container_logs,
kwargs={"container_id": "container_id"})
assert len(agent.processes) == 1
assert api.create_container.called
assert api.start.called
def test_populate_env_vars_is_responsive_to_logging_config(
monkeypatch, cloud_api, flag):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
with set_temporary_config({
"cloud.agent.auth_token": "token",
"cloud.api": "api",
}):
agent = DockerAgent(labels=["42", "marvin"], no_cloud_logs=flag)
env_vars = agent.populate_env_vars(
GraphQLResult({
"id": "id",
"name": "name",
"flow": {
"id": "foo"
}
}))
assert env_vars["PREFECT__LOGGING__LOG_TO_CLOUD"] == str(not flag).lower()
def test_docker_agent_no_pull(monkeypatch, cloud_api):
api = MagicMock()
monkeypatch.setattr(
"prefect.agent.docker.agent.DockerAgent._get_docker_client",
MagicMock(return_value=api),
)
agent = DockerAgent()
assert not agent.no_pull
agent = DockerAgent(no_pull=True)
assert agent.no_pull
with context(no_pull=True):
agent = DockerAgent()
assert agent.no_pull
with context(no_pull=False):
agent = DockerAgent(no_pull=True)
assert agent.no_pull
with context(no_pull=False):
agent = DockerAgent(no_pull=False)
assert not agent.no_pull
def test_docker_agent_config_options_populated(monkeypatch, cloud_api):
import docker # DockerAgent imports docker within the constructor
api = MagicMock()
monkeypatch.setattr(
"docker.APIClient",
api,
)
with set_temporary_config({"cloud.agent.auth_token": "TEST_TOKEN"}):
agent = DockerAgent(base_url="url", no_pull=True)
assert agent.client.get_auth_token() == "TEST_TOKEN"
assert agent.logger
assert agent.no_pull
assert api.call_args[1]["base_url"] == "url"
def test_docker_agent_heartbeat_logs_reconnect(monkeypatch, runner_token,
caplog):
api = MagicMock()
api.ping.return_value = True
monkeypatch.setattr("prefect.agent.docker.agent.docker.APIClient",
MagicMock(return_value=api))
agent = DockerAgent()
api.ping.return_value = False
agent.heartbeat()
agent.heartbeat()
api.ping.return_value = True
agent.heartbeat()
assert api.ping.call_count == 4
assert "Reconnected to Docker daemon" in caplog.text