CODEWITHSUNDEEP
amazon-web-servicesansible
Tomer Leibovich
Tomer Leibovich

Reputation: 372

Getting volume_id of non-root device in Ansible

How do I filter out (assuming the use of when) ebs volumes that are not 'dev/sda1'?

For example, the playbook is:

- name:                     List Volumes
  ec2_vol:
    region:                 "{{ aws_vars.region }}"
    instance:               "{{ ec2.instances[0].instance_id }}"
    state:                  list
  register:                 volumes
  when:                     volumes.device_name != '/dev/sda1'
- debug:                    msg="{{ volumes.volumes | map(attribute='id') | list }}"

This does not work.

The var for volumes is something like:

[
        {
            "attachment_set": {
                "attach_time": "2018-05-28T11:17:56.000Z",
                "deleteOnTermination": "false",
                "device": "xvdf",
                "instance_id": "i-00ac0585d1d4974aa",
                "status": "attached"
            },
            "create_time": "2017-07-18T14:54:28.969Z",
            "encrypted": false,
            "id": "vol-0506598d250ffe3d3",
            "iops": 450,
            "size": 150,
            "snapshot_id": "snap-0ce6832b64cfa093d",
            "status": "in-use",
            "tags": {
                "Site Desktop 1": "IIS",
                "project-group": "DEV"
            },
            "type": "gp2",
            "zone": "eu-central-1b"
        }

Upvotes: 0

Views: 381

Answers (1)

Ignacio Millán
Ignacio Millán

Reputation: 8026

The when statement is executed before the task (it decides whether the task should be run or not), so it can't be used to filter the results.

Using the set_fact module you can edit the results from a task and save them in a new variable. I used that in combination with the json query filter:

  - name:                     List Volumes
    ec2_vol:
      region:                 "eu-west-1"
      instance:               "i-0f7gd2b0090924864"
      state:                  list
    register:                 volumes
  - set_fact: filtered="{{ volumes.volumes | json_query('[?attachment_set.device!=`/dev/sda1`]') }}"
  - debug:                    msg="{{ filtered }}"

Upvotes: 3

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