Running shell command in Ansible

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1

Hello,
Lately, I’ve started to use Ansible. I’m trying to write a script that pass a device as a parameter, and then chain a star sign for it.
For example, if the device name is /dev/sda, i would like to count the count of line of the command: ls -l /dev/sda*. I get an error after running my script.

Here is my script:
`

  • name: Get Hitachi Devices device details
    shell: lsscsi | grep HITACHI | awk ‘{print $6}’
    register: hitachiDevice

  • name: Check if the volume is partitioned
    shell: ls -l “{{ hitachiDevice.rc }}”* | wc -l
    failed_when: hitachiDevice.rc != 1

`

Here is the error:

FAILED! => {"changed": true, "cmd": "ls -l \"0\"* | wc -l", "delta": "0:00:00.027338", "end": "2016-08-10 14:15:12.200415", "failed": true, "failed_when_result": true, "rc": 0, "start": "2016-08-10 14:15:12.173077", "stderr": "ls: cannot access 0*: No such file or directory", "stdout": "0", "stdout_lines": ["0"], "warnings": []}

Can someone tell my what is the issue, and how can i fix it?

2

I’ve made some changes in the script. I still need some help with the script.

Here is the updated code.

- name: Get Hitachi Devices device details
shell: lsscsi | grep HITACHI | awk '{print $6}'
register: hitachiDevice

- name: Check if the volume is partitioned
shell: ls -l "{{ hitachiDevice.stdout }}"* | wc -l
failed_when: hitachiDevice.rc != 1

Here is the error:

FAILED! => {“changed”: true, “cmd”: “ls -l "/dev/sdg"* | wc -l”, “delta”: “0:00:00.010330”, “end”: “2016-08-10 17:35:34.819617”, “failed”: true, “failed_when_result”: true, “rc”: 0, “start”: “2016-08-10 17:35:34.809287”, “stderr”: “”, “stdout”: “1”, “stdout_lines”: [“1”], “warnings”: }

3

As the message say "failed_when_result": true, so you failed_when triggered. rc = 0 is OK and rc > 0 is an ERROR.

So for you failed_when to make sense it should be != 0.

I also recommend moving the failed_when to the "Get Hitachi Devices device details" task, since it is that task that fails it will be more clear and you debugging would be easier.