pip docker-compose doesn't seems to have the tag "latest" anymore

[Platou]

Installing the role:

  roles:
  - { role: "nickjj.docker", tags: ["docker"] }

Output:

TASK [nickjj.docker : Install Python packages] *********************************
ok: [host] => (item={u'state': u'present', u'name': u'docker'})
failed: [host] (item={u'path': u'/usr/local/bin/docker-compose', u'state': u'present', u'version': u'latest', u'name': u'docker-compose', u'src': u'/usr/local/lib/docker/virtualenv/bin/docker-compose'}) => {"changed": false, "cmd": "/usr/local/lib/docker/virtualenv/bin/pip2 install docker-compose==latest", "item": {"name": "docker-compose", "path": "/usr/local/bin/docker-compose", "src": "/usr/local/lib/docker/virtualenv/bin/docker-compose", "state": "present", "version": "latest"}, "msg": "stdout: Collecting docker-compose==latest\n\n:stderr:   Could not find a version that satisfies the requirement docker-compose==latest (from versions: 1.1.0rc1, 1.1.0rc2, 1.1.0, 1.2.0rc1, 1.2.0rc2, 1.2.0rc3, 1.2.0rc4, 1.2.0, 1.3.0rc1, 1.3.0rc2, 1.3.0rc3, 1.3.0, 1.3.1, 1.3.2, 1.3.3, 1.4.0rc1, 1.4.0rc2, 1.4.0rc3, 1.4.0, 1.4.1, 1.4.2, 1.5.0rc1, 1.5.0rc2, 1.5.0rc3, 1.5.0, 1.5.1, 1.5.2, 1.6.0rc1, 1.6.0, 1.6.1, 1.6.2, 1.7.0rc1, 1.7.0rc2, 1.7.0, 1.7.1, 1.8.0rc1, 1.8.0rc2, 1.8.0, 1.8.1, 1.9.0rc1, 1.9.0rc2, 1.9.0rc3, 1.9.0rc4, 1.9.0, 1.10.0rc1, 1.10.0rc2, 1.10.0, 1.10.1, 1.11.0rc1, 1.11.0, 1.11.1, 1.11.2, 1.12.0rc1, 1.12.0rc2, 1.12.0, 1.13.0rc1, 1.13.0, 1.14.0rc1, 1.14.0rc2, 1.14.0, 1.15.0rc1, 1.15.0, 1.16.0rc1, 1.16.0rc2, 1.16.0, 1.16.1, 1.17.0rc1, 1.17.0, 1.17.1, 1.18.0rc1, 1.18.0rc2, 1.18.0, 1.19.0rc1, 1.19.0rc2, 1.19.0rc3, 1.19.0, 1.20.0rc1, 1.20.0rc2, 1.20.0, 1.20.1, 1.21.0rc1, 1.21.0, 1.21.1, 1.21.2, 1.22.0rc1, 1.22.0rc2, 1.22.0, 1.23.0rc1, 1.23.0rc2, 1.23.0rc3, 1.23.0, 1.23.1, 1.23.2)\nNo matching distribution found for docker-compose==latest\n"}

[nickjj]

What type of environment are you running this under?

On Ubuntu 16.04, Ubuntu 18.04 and Debian Stretch it installs on a fresh box using version "latest" with state "present".

[Platou]

Microsoft Azure : Canonical, UbuntuServer, 18.04-LTS, latest

[nickjj]

Here's what I used for testing where everything ran successfully:

• Set up those 3 distros using Docker images
• Created a stock Ubuntu 18.04 VM using the server ISO on Ubuntu's site
• Set up a brand new DigitalOcean 18.04 server

In all 3 cases, the role ran to completion and installed the latest version of Docker and Docker Compose.

In all 3 cases, I ran apt-get update -y && apt-get install -y python before this role since that's required for Ansible to run. This is a common bootstrap strategy.

What happens if you add that to a pre_tasks in your playbook?

[nickjj]

Here's a complete task you can drop in:

- name: Install Python without using Ansible modules
  raw: >
    bash -c "test -e /usr/bin/python \
    || (apt-get -qy update && apt-get install -qy python)"
  changed_when: false

It's using raw since this is meant to be ran before Ansible is even capable of being run.

[Platou]

Here's my playbook:

- hosts: "host"
  become: true
  become_method: sudo

  roles:
  - { role: "nickjj.docker", tags: ["docker"] }

  pre_tasks:
  - name: Install python 2
    raw: test -e /usr/bin/python || (apt -y update && apt install -y python-minimal)

[nickjj]

Does anything change if you use python instead of python-minimal?

[Platou]

Same error with python instead of python-minimal

[nickjj]

You could try adding this after the - name: Install Virtualenv task:

- name: Upgrade PIP
  pip:
    name: "pip"
    virtualenv: "{{ docker__pip_virtualenv }}"
    state: "forcereinstall"

Truthfully I'm not sure why that would be needed on Azure, but it's worth trying.

[nickjj]

Also what version of Ansible are you using? Maybe the pip package changed in some way to automatically convert latest to being omit. I'm running 2.7.5.

[nickjj]

Another thing you could try is setting docker__compose_version: "". Let me know if that installs the latest version without erroring out. If it does, that's likely something I should merge into the next release.

[Platou]

I'm using Ansible 2.5.1

[Platou]

Working fine with Ansible 2.7.5

[nickjj]

Thanks. Did you happen to try "" with 2.5.1?

[nickjj]

Going by some PR I read I think "" will fail with 2.5.1 too.

I think any version that's not parseable as a version is getting cast to "" and in 2.5.x, "" gets passed into pip like pip install docker-compose=="" (which is invalid) but with 2.7.x it gets set as pip install docker-compose because Ansible doesn't set the version for empty strings.

I'll leave this issue open until I address a solution that works for both 2.5.x and 2.7.x, thanks for the heads up.

[nickjj]

Closing this. It's been addressed in v1.8.0 which is available in the Galaxy. The role is back to working with Ansible 2.5 and 2.7.