FreeKB - Ansible register parameter (stdout stderr rc)
Ansible - register parameter (stdout stderr rc)

The register parameter can be used to store the standard output (stdout), standard error (stderr) and return code (rc) of a command. In this example, the stdout/stderr/rc of the ps (show processes) command will be stored in a variable named "out". 

- name: ps command
  shell: ps
  register: out


You can then do something with the register, such as printing the output using the debug module.

- name: standard out
    var: out.stdout_lines

- name: standard error
    var: out.stderr_lines

- name: return code
    var: out.rc


Running this playbook should return something like this.

TASK [standard out]
ok: [] => {
    "msg": "4012  pts/2  00:00:00  bash"

TASK [standard error]
ok: [] => {
    "msg": ""

TASK [return code]
ok: [] => {
    "msg": "0"


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