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Accepted
Zulakis
Asked: 2015-06-02 03:50:39 +0800 CST

ansible print debug msg variable

  • 772

I try to print the previously registered mosh_version variable using the ansible debug msg command like this:

- name: Print mosh version
  debug: msg="Mosh Version: {{ mosh_version.stdout }}"

It doesn't work and prints the following error:

Note: The error may actually appear before this position: line 55, column 27

- name: Print mosh version
  debug: msg="Mosh Version: {{ mosh_version.stdout }}"
                          ^
We could be wrong, but this one looks like it might be an issue with
missing quotes.  Always quote template expression brackets when they
start a value. For instance:

    with_items:
      - {{ foo }}

Should be written as:

    with_items:
      - "{{ foo }}"

I tried 

- name: Print mosh version
  debug: msg=Mosh Version: "{{ mosh_version.stdout }}"

but this will just print "Mosh".

What's the best way to get this running?

deployment

6 Answers

  1. Best Answer

    Try this:

    - name: Print mosh version
  debug: "msg=Mosh Version: '{{ mosh_version.stdout }}'"

    More info in http://docs.ansible.com/YAMLSyntax.html#gotchas

    Edited: Something like this works perfect for me:

    - name: Check Ansible version
  command: ansible --version
  register: ansibleVersion

- name: Print version
  debug:
    msg: "Ansible Version: {{ ansibleVersion.stdout }}"

    http://pastie.org/private/cgeqjucn3l5kxhkkyhtpta

    • 43

  2. Simplest answer

    - debug: var=mosh_version.stdout
    • 11

  3. I have displayed variable and message in the same debug play.

    Ansible Task

    - name: Report the /boot/initramfs file status for latest installed kernel
  debug:
    msg: "{{ ansible_hostname }} =  {{INITRAMFS_LAST_KERNEL.stdout}}"

    Output

    TASK [os-upgrade.linux : Report the /boot/initramfs file status for latest installed kernel] *******************************************
ok: [ANSIBLENODE] => {
    "msg": "ANSIBLENODE =  /boot/initramfs-3.10.0-1062.12.1.el7.x86_64.img"
}
    • 3

  4. Just remove the colon

    debug: msg="Mosh Version {{ mosh_version.stdout }}"
    • 2

  5. Anytime I have problems with special characters in Ansible strings/cmds I do this:

    1. Wrap with single quotes
    2. Wrap with double curly brackets

    So your standard colon becomes {{':'}}

    And your task becomes:

    - debug: msg="Ansible Version{{':'}} {{ ansibleVersion.stdout }}"

    Again this works for most special characters, even strings. Consider the following:

    docker ps --format '{{.Names}}'

    In order to run this in Ansible, just apply the same logic, the following task executes as expected:

    - name: Get the docker container names
  become: yes
  shell: "docker ps --format '{{'{{'}}.Names{{'}}'}}'"
  register: docker_containers
    • 2

  6. I use this, notice the location of double quotes(") and single quotes(')

    - name: Print mosh version
  debug: "msg='Mosh Version: {{ mosh_version.stdout }}'"
    • 1