Custom tagging for push and shipit

[fabianvf]

ISSUE TYPE

• Feature Pull Request

SUMMARY

Kind of touches on #125

This PR adds the --tag option to the push subcommand, allowing you to specify a custom tag for your image. This custom tag will be applied to your image, and then that tag will be pushed to your repository (instead of the default, image_buildstamp).

Before:

$ ansible-container push --push-to ansibleapp
Pushing to "docker.io/ansibleapp
Attaching to ansible_ansible-container_1
Cleaning up Ansible Container builder...
Tagging docker.io/ansibleapp/elk-ansibleapp-elasticsearch
Pushing docker.io/ansibleapp/elk-ansibleapp-elasticsearch:20170201164646...
The push refers to a repository [docker.io/ansibleapp/elk-ansibleapp-elasticsearch]
Preparing
Layer already exists
20170201164646: digest: sha256:85bf0ba4adf4264ed263ec50e48542cffff6cae5a2ed01c9dac8fed813535bcd size: 1350
Done!

After:

 $ ansible-container push --push-to ansibleapp --tag latest
Pushing to "docker.io/ansibleapp
Attaching to ansible_ansible-container_1
Cleaning up Ansible Container builder...
Tagging docker.io/ansibleapp/elk-ansibleapp-elasticsearch
Pushing docker.io/ansibleapp/elk-ansibleapp-elasticsearch:latest...
The push refers to a repository [docker.io/ansibleapp/elk-ansibleapp-elasticsearch]
Preparing
Layer already exists
latest: digest: sha256:85bf0ba4adf4264ed263ec50e48542cffff6cae5a2ed01c9dac8fed813535bcd size: 1350
Done!

Stdout for ansible-container shipit is unchanged, but the generated role/tasks/main.yml looks like this:

Before (ansible-container shipit openshift --pull-from ansibleapp):

- oso_deployment:
    project_name: elk-ansibleapp
    labels:
      app: elk-ansibleapp
      service: elasticsearch
    deployment_name: elasticsearch
    containers:
    - securityContext: {}
      name: elasticsearch
      image: docker.io/ansibleapp/elk-ansibleapp-elasticsearch:None
      env:
        ES_JAVA_OPTS: -Xms2g -Xmx2g
      workingDir: /usr/share/elasticsearch/bin
      args:
      - ./elasticsearch
      ports:
      - 9200
      - 9300
    replace: true
    replicas: '{{ replicas if replicas is defined else 3 }}'
  register: output

After (ansible-container shipit openshift --pull-from ansibleapp --tag latest):

- oso_deployment:
    project_name: elk-ansibleapp
    labels:
      app: elk-ansibleapp
      service: elasticsearch
    deployment_name: elasticsearch
    containers:
    - securityContext: {}
      name: elasticsearch
      image: docker.io/ansibleapp/elk-ansibleapp-elasticsearch:latest
      env:
        ES_JAVA_OPTS: -Xms2g -Xmx2g
      workingDir: /usr/share/elasticsearch/bin
      args:
      - ./elasticsearch
      ports:
      - 9200
      - 9300
    replace: true
    replicas: '{{ replicas if replicas is defined else 3 }}'
  register: output

[chouseknecht]

@fabianvf, looks good! I'll merge and add some doc updates.