Ansible looping over register and multiple lists

[Jeremie Levy‏]

Hi

I'm trying to do the following (in windows but it's not important):

1. Need to deploy N number of build agents to a server (according to the inventory nb_of_agents)  - iteration1
   
2. Each agent should have a unique port starting from 8811 - iteration2
   
3. Check if the service is already present - store in register. - REGISTER LIST
4. Install according to the register.

First question: Using a register list, how do i use : when: service.results.exists for specific index? 

Second question: how do i go in parrallel via multiple list:

1. with_sequence: start=1 end='{{ nb_of_agents}}'' and
2. with_sequence: start=8811 count='{{ nb_of_agents}}'' and
3. when: service.result[index].exists

So the code looks like this:

- name: check service '{{ item }}' is not already running

win_service:

name: Build Agent Prod '{{ item }}'

register: svc

with_sequence: start=1 end='{{nb_of_agents}}'

- name: output

debug:

var: svc

- name: output

debug:

var: svc.results.[item].exists

with_sequence: count='{{nb_of_agents}}'

- name: install Agent '{{ item }}'

win_copy:

src: \\some\share\buildagent_prod_template

dest: 'D:\buildagent_prod_{{ item }}'

force: no

remote_src: yes

when: svc.results[item].exists == false

register: agent

with_sequence: count='{{nb_of_agents}}'

- name: modify Port

win_lineinfile:

path: D:\buildagent_prod_{{ item }}\conf\node.properties

backrefs: yes

regexp: '(^port)=.*'

line: '$1={{ item2 }}'

when: 'agent.results[item]'

with_together: count=nb_of_agents

with_items: start=qb_prod_agent_port count=nb_of_agents

Thanks!!

[David Villasmil‏]

Please paste the code WITHOUT any formatting. Font should be any single-space so that spacing is correct.

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[Jeremie Levy‏]

Hi David

Here it is:

[Jordan Borean‏]

You can't normally run in parallel with a loop, they are run sequentially. You can hack around it by running with async and poll 0 and then poll that status but it isn't a perfect "run all items in list in parallel" that you are looking for.

Your debug output

- name: output
  debug:
    var: svc.results.[item].exists
  with_sequence: count='{{nb_of_agents}}'

Won't work as you are trying to get key 0, 1, 2, 3, etc of the svc.results var when it is actually a list. You want something like 'svc.results[item].exists' instead. What this does is get's the list entry of item, bare in mind that lists are a 0 based index, so the first entry is 0, 2nd is 1 and so on. You might have to do something like 'svc.results[item - 1].exists' if you want to match up the entry to your agent index starting at 1.





I haven't used with_sequence a lot so can't tell if that syntax is ok, apart from that what you have seems ok at a brief glance but having the output from a run that failed would help us narrow down your issue.


Thanks

Jordan

[Jeremie Levy‏]

Thank you Jordan

Actually, I also tried without the "." as you suggested and it didn't work

Code:

    - name: output

      debug:

        var: qb_svc

    

    - name: output

      debug:

        var: qb_svc.results[item].exists

      with_sequence: count='{{nb_of_agents}}'

Here is my output with your suggestion:

task path: /ansible/scripts/playbooks/qb-agents-fw-multiple.yml:16

ok: [hasgappqba1102.DOMAIN] => {

    "qb_svc": {

        "changed": false,

        "msg": "All items completed",

        "results": [

            {

                "_ansible_ignore_errors": null,

                "_ansible_item_result": true,

                "_ansible_no_log": false,

                "_ansible_parsed": true,

                "changed": false,

                "exists": false,

                "failed": false,

                "item": "1"

            },

            {

                "_ansible_ignore_errors": null,

                "_ansible_item_result": true,

                "_ansible_no_log": false,

                "_ansible_parsed": true,

                "changed": false,

                "exists": false,

                "failed": false,

                "item": "2"

            }

        ]

    }

}

TASK [output] **************************************************************************************************************************************************************************************************************************************************************************************

task path: /ansible/scripts/playbooks/qb-agents-fw-multiple.yml:20

ok: [hasgappqba1102.DOMAIN] => (item=None) => {

    "qb_svc.results[item].exists": "VARIABLE IS NOT DEFINED!: 'list object' has no attribute u'1'"

}

ok: [hasgappqba1102.DOMAIN] => (item=None) => {

    "qb_svc.results[item].exists": "VARIABLE IS NOT DEFINED!: 'list object' has no attribute u'2'"

}

TASK [install Agent '{{ item }}'] ******************************************************************************************************************************************************************************************************************************************************************

task path: /ansible/scripts/playbooks/qb-agents-fw-multiple.yml:25

fatal: [hasgappqba1102.DOMAIN]: FAILED! => {

    "msg": "The conditional check 'qb_svc.results[item].exists' failed. The error was: error while evaluating conditional (qb_svc.results[item].exists): 'list object' has no attribute u'1'\n\nThe error appears to have been in '/ansible/scripts/playbooks/qb-agents-fw-multiple.yml': line 25, column 7, but may\nbe elsewhere in the file depending on the exact syntax problem.\n\nThe offending line appears to be:\n\n\n    - name: install Agent '{{ item }}'\n      ^ here\nWe could be wrong, but this one looks like it might be an issue with\nmissing quotes.  Always quote template expression brackets when they\nstart a value. For instance:\n\n    with_items:\n      - {{ foo }}\n\nShould be written as:\n\n    with_items:\n      - \"{{ foo }}\"\n"

}

        to retry, use: --limit @/ansible/scripts/playbooks/qb-agents-fw-multiple.retry

Thank you!

[Jordan Borean‏]

Looks like item is being used as a unicode string (u'1') and not an int, can you try qb_svc.results[item|int].exists and see if that works?


[Jeremie Levy‏]

It worked!

Since i the first is 0, the last should be {{nb_of_agents -1 |int}}

    - name: output

      debug:

        var: qb_svc.results[item|int].exists

      with_sequence: start=0 end='{{nb_of_agents - 1 |int}}'

Thanks!!!!