# docker_stack – docker stack module

New in version 2.8.

- Synopsis

- Requirements

- Parameters

- Examples

- Return Values

- Status

## Synopsis

- Manage docker stacks using the ‘docker stack’ command on the target node (see examples).

## Requirements

The below requirements are needed on the host that executes this module.

- jsondiff

- pyyaml

## Parameters

Parameter | Choices/Defaults | Comments
--- | --- | ---
absent_retries integer | Default: 0 | If `>0` and state is `absent` the module will retry up to absent_retries times to delete the stack until all the resources have been effectively deleted. If the last try still reports the stack as not completely removed the module will fail.
absent_retries_interval integer | Default: 1 | Interval in seconds between consecutive absent_retries.
compose list | Default: [] | List of compose definitions. Any element may be a string referring to the path of the compose file on the target host or the YAML contents of a compose file nested as dictionary.
name string / required |  | Stack name

prune
boolean

Choices:
- no ←
- yes

If true will add the `--prune` option to the `docker stack deploy` command. This will have docker remove the services not present in the current stack definition.

resolve_image
string

Choices:
- always
- changed
- never

If set will add the `--resolve-image` option to the `docker stack deploy` command. This will have docker query the registry to resolve image digest and supported platforms. If not set, docker use "always" by default.

state
string

Choices:
- present ←
- absent

Service state.

with_registry_auth
boolean

Choices:
- no ←
- yes

If true will add the `--with-registry-auth` option to the `docker stack deploy` command. This will have docker send registry authentication details to Swarm agents.

## Examples

    - name: Deploy stack from a compose file
      docker_stack:
        state: present
        name: mystack
        compose:
          - /opt/docker-compose.yml

    - name: Deploy stack from base compose file and override the web service
      docker_stack:
        state: present
        name: mystack
        compose:
          - /opt/docker-compose.yml
          - version: '3'
            services:
              web:
                image: nginx:latest
                environment:
                  ENVVAR: envvar

    - name: Remove stack
      docker_stack:
        name: mystack
        state: absent

## Return Values

Common return values are documented here, the following are the fields unique to this module:

Key | Returned | Description
--- | --- | ---
stack_spec_diff dictionary | on change | dictionary containing the differences between the 'Spec' field of the stack services before and after applying the new stack definition. Sample: "stack_spec_diff": {'test_stack_test_service': {u'TaskTemplate': {u'ContainerSpec': {delete: [u'Env']}}}}

## Status

- This module is not guaranteed to have a backwards compatible interface. [preview]

- This module is maintained by the Ansible Community. [community]

### Authors

- Dario Zanzico (@dariko)

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