我想使用 python docker sdk 在现有的 swarm 网络中创建一个服务。我有一个名为test_net
.
库的安装:pip3 install docker
下面是用于创建服务的代码
import docker
from docker.types import RestartPolicy, Placement
def python_sdk():
client = docker.DockerClient(base_url='unix://var/run/docker.sock')
service_created = client.services.create(
image='python:3.7-alpine',
command='python /home/ubuntu/python.py',
constraints=Placement(constraints=['worker']),
mounts='/home/ubuntu/deployment/python.py:/home/ubuntu/python.py:rw',
networks=['test_net'],
restart_policy=RestartPolicy(condition='none'),
name='python_sdk'
)
print("Created service : ", service_created)
以下是我通过执行上述代码得到的错误:
Traceback (most recent call last):
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/docker/api/client.py", line 268, in _raise_for_status
response.raise_for_status()
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/requests/models.py", line 943, in raise_for_status
raise HTTPError(http_error_msg, response=self)
requests.exceptions.HTTPError: 400 Client Error: Bad Request for url: http+docker://localhost/v1.41/services/create
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "client.py", line 20, in <module>
python_sdk()
File "client.py", line 16, in python_sdk
name='python_sdk'
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/docker/models/services.py", line 227, in create
service_id = self.client.api.create_service(**create_kwargs)
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/docker/utils/decorators.py", line 34, in wrapper
return f(self, *args, **kwargs)
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/docker/api/service.py", line 190, in create_service
self._post_json(url, data=data, headers=headers), True
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/docker/api/client.py", line 274, in _result
self._raise_for_status(response)
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/docker/api/client.py", line 270, in _raise_for_status
raise create_api_error_from_http_exception(e)
File "/home/ubuntu/deployment/dags/venv/lib/python3.6/site-packages/docker/errors.py", line 31, in create_api_error_from_http_exception
raise cls(e, response=response, explanation=explanation)
docker.errors.APIError: 400 Client Error for http+docker://localhost/v1.41/services/create: Bad Request ("json: cannot unmarshal object into Go struct field Placement.TaskTemplate.Placement.Constraints of type []string")
我指的是这个文档。
如何使用 Placement 对象来使用约束?
我也试过constraints = ["Placement(constraints=['worker']"]