Ansible register result of multiple commands

Question

I was given a task to verify some routing entries for all Linux server and here is how I did it using an Ansible playbook

---
  - hosts: Linux
    serial: 1

            


        

Answer 1

A slightly different situation, which took a while to figure out. If you want to use the results of multiple items, but for changed_when, then the register variable will not have a var.results! Instead, changed_when, is evaluated for each item, and you can just directly use the register var.

Simple example, which will result in changed: false:

- action: command echo {{item}}
  register: out
  changed_when: "'z' in out.stdout"
  with_items:
    - hello
    - foo
    - bye

Another example:

- name: Create fulltext index for faster text searches.
  mysql_db: name={{SO_database}} state=import target=/tmp/fulltext-{{item.tableName}}-{{item.columnName}}.sql
  with_items: 
    - {tableName: Posts,  columnName: Title}
    - {tableName: Posts,  columnName: Body}
    - {tableName: Posts,  columnName: Tags}
    - {tableName: Comments, columnName: Text}
  register: createfulltextcmd
  changed_when: createindexcmd.msg.find('already exists') == -1

Finally, when you do want to loop through results in other contexts, it does seem a bit tricky to programmatically access the index as that is not exposed. I did find this one example that might be promising:

- name: add hosts to known_hosts
shell: 'ssh-keyscan -H {{item.host}}>> /home/testuser/known_hosts'
with_items:
  - { index: 0, host: testhost1.test.dom }
  - { index: 1, host: testhost2.test.dom }
  - { index: 2, host: 192.168.202.100 }
when: ssh_known_hosts.results[{{item.index}}].rc == 1