regex in command

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1

Hi All ,

I have to search for a pattern string in the various log files located in some directory on the host. how we can use regex kind of a thing with command module or may be some other useful ansible way i am not aware about.

here is my code which complains about vm*.log.

- name: Check whether vmware log file contains TDR
  command: grep 'TDR_DUMP' '{{guest_vm_path}}/{{item}}/vm*.log'
  with_items:
        - '{{guest_list}}'
        - '{{guest_name_poweredon}}'
  ignore_errors: True
  register: output

- debug:
    var: output

- debug: msg="No TDR signature found"
  when: output["results"][0].rc == 1 and
        output["results"][1].rc == 1 and
        output["results"][2].rc == 1

- debug: msg="Found the TDR signature"
  when: output["results"][0].rc == 0 or
        output["results"][1].rc == 0 or
        output["results"][2].rc == 0

- debug:
    var: output.stdout_lines
  when: output["results"][0].rc == 0 or
        output["results"][1].rc == 0 or
        output["results"][2].rc == 0

OutPUT:

ok: [x.x.x.x] => {
    "output": {
        "changed": true, 
        "failed": true, 
        "msg": "One or more items failed", 
        "results": [
            {
                "_ansible_item_result": true, 
                "_ansible_no_log": false, 
                "_ansible_parsed": true, 
                "changed": true, 
                "cmd": [
                    "grep", 
                    "TDR_DUMP", 
                    "/vmfs/volumes/mag27_datastore/test1/vm*.log"
                ], 
                "delta": "0:00:00.015495", 
                "end": "2017-10-14 04:35:30.309261", 
                "failed": true, 
                "invocation": {
                    "module_args": {
                        "_raw_params": "grep 'TDR_DUMP' '/vmfs/volumes/mag27_datastore/test1/vm*.log'", 
                        "_uses_shell": false, 
                        "chdir": null, 
                        "creates": null, 
                        "executable": null, 
                        "removes": null, 
                        "warn": true
                    }
                }, 
                "item": "test1", 
                "rc": 2, 
                "start": "2017-10-14 04:35:30.293766", 
                "stderr": "grep: /vmfs/volumes/mag27_datastore/test1/vm*.log: No such file or directory", 
                "stderr_lines": [
                    "grep: /vmfs/volumes/mag27_datastore/test1/vm*.log: No such file or directory"
                ], 
                "stdout": "", 
                "stdout_lines": []
            }, 
            {
                "_ansible_item_result": true,
2

command module is not running a shell so shell expansion like vm*.log will not work, you need to use the shell module.

You could also do this with the find module.

3

I tried Shell module too like below but it actually serach for vm*.log file instead of all the vm.log files.

- name: Check whether vmware log file contains TDR
  shell: grep 'TDR_DUMP' '{{guest_vm_path}}/{{item}}/vmware*.log'
  with_items:
        - '{{guest_list}}'
        - '{{guest_name_poweredon}}'
  ignore_errors: True
  register: output

 TASK [ESX_TDR_DUMP : debug] *******************************************************************************************************************
ok: [xxxxx] => {
    "output": {
        "changed": true, 
        "failed": true, 
        "msg": "One or more items failed", 
        "results": [
            {
                "_ansible_item_result": true, 
                "_ansible_no_log": false, 
                "_ansible_parsed": true, 
                "changed": true, 
                "cmd": "grep 'TDR_DUMP' '/vmfs/volumes/mag27_datastore/test1/vmware*.log'", 
                "delta": "0:00:00.021120", 
                "end": "2017-10-14 07:45:12.942906", 
                "failed": true, 
                "invocation": {
                    "module_args": {
                        "_raw_params": "grep 'TDR_DUMP' '/vmfs/volumes/mag27_datastore/test1/vmware*.log'", 
                        "_uses_shell": true, 
                        "chdir": null, 
                        "creates": null, 
                        "executable": null, 
                        "removes": null, 
                        "warn": true
                    }
                }, 
                "item": "test1", 
                "rc": 2, 
                "start": "2017-10-14 07:45:12.921786", 
                "stderr": "grep: /vmfs/volumes/mag27_datastore/test1/vmware*.log: No such file or directory", 
                "stderr_lines": [
                    "grep: /vmfs/volumes/mag27_datastore/test1/vmware*.log: No such file or directory"
                ], 
                "stdout": "", 
                "stdout_lines": []
            }, 
            {
                "_ansible_item_result": true, 
                "_ansible_no_log": false, 
                "_ansible_parsed": true, 
                "changed": true, 
                "cmd": "grep 'TDR_DUMP' '/vmfs/volumes/mag27_datastore/test2/vmware*.log'", 
                "delta": "0:00:01.024557", 
                "end": "2017-10-14 07:45:14.937439", 
                "failed": true, 
                "invocation": {
 -VM
4

Not an Ansible issue, but you are using single quotes around the file names.
Single qoutes mean _don't do_ expansion, aka send it unchanged to the command, so you need to loose them or replace them with double quotes.