Lab 10 - Multiple Environments

Mandatory

Split your inventory

  • Create two inventory files for test and prod

  • Use the same structure, but only use one web server

    • Add web1.<firstname>.lab into prod
    • Add web2.<firstname>.lab into test

  • Run a ad-hoc command on the hostgroup web for both inventory files test and prod

  • Verify, if the task was executed on the right server

Hint

Use the option -i <inventory-file>

Set some variables

  • Create a parent group called prod and add the group web and db
  • Create a parent group called test and add the group web and db
  • Create a variable envvar: test only for the test servers
  • Create a variable envvar: prod only for the prod servers
  • Create a simple playbook and print out the envvar for both inventories
  • Run the playbook on both inventories test and prod

Hint

Use the debug module to print out variables.

Hint

Use the -i <inventory-file> option

Change the inventory in ansible.cfg

  • Make the test inventory to your default inventory

Create a new role

  • Create a new role flask_app

  • Create a new variable flask_app_version for test and prod

    • value for prod -> v1.0
    • value for test -> v1.1

  • Create a role default variable for flask_app_version and set it to master

  • Create a task to checkout the git repo (see Git Module)

  • Create a new playbook deploy.yml

    • run only on web hostgroup
    • add the flask_app role

  • Run the playbook on both inventories test and prod

  • Verify the checkout of the correct version -> Log on the servers, switch into the /opt/flask_app directory and run git describe --tags or git status

Commit your changes

  • add all files to your git repo and commit it