Unable to gather facts about a single node in BigIP

[vijayravi17]

I am using the below code to collect facts about a singe node inside a pool on F5. We use prompt and trying to fetch result. But while we try to execute it brings all the pool name and members from the ltm-pools instead of the node that we are trying to fetch information. Any help in fixing or correcting the issue would be a great help.

Also it takes about 15 minutes for the result to display . I suppose it does because it brings all the pool member information.

---

• name: Conditionally force a node offline hosts: bigip15-0.askf5team.local:bigip14-1.askf5team.local gather_facts: False vars: provider: password: "{{ bigip_password }}" server: "{{ ansible_host }}" user: "{{ bigip_username }}" validate_certs: False active_list: []

  vars_prompt:

  • name: node prompt: "What is the node address? " private: no

  tasks:

  • name: Collect bigip facts bigip_device_facts: gather_subset: - ltm-pools provider: "{{ provider }}" register: pools

  • name: Determine pools the node is in and record their active member counts set_fact: active_list: "{{ active_list + [ item[1] ] }}" when: node in item[2] loop: "{{ pools | json_query('ltm_pools[].[name, active_member_count, members[*].address]') }}"

  • name: Display active member count list debug: var=active_list

  • name: Display count with the least amount of active members debug: msg="Minimum active member count from all pools {{ active_list | min }}"

  • name: Force node offline bigip_node: state: offline name: "{{ node }}" provider: "{{ provider }}" delegate_to: localhost when: active_list | min | int > 1

[nmenant]

i've tried your code: BIG-IP v14.1 Ansible Collection 1.8.1 (you need to switch from bigip_device_fact to bigip_device_info)

---

- hosts: default
  gather_facts: false
  vars: 
    provider:
      server: 192.168.143.154
      user: admin
      password: xxxxxxx
      validate_certs: no
      server_port: 443
    active_list: []

  vars_prompt:

    - name: node
      prompt: "What is the node address? "
      private: no

  tasks:

    - name: Collect bigip facts
      bigip_device_info:
        gather_subset:
          - ltm-pools
        provider: "{{ provider }}"
      register: pools
      delegate_to: localhost

    - name: Determine pools the node is in and record their active member counts
      set_fact:
        active_list: "{{ active_list + [item[1]] }}"
      when: node in item[2]
      loop: "{{ pools | json_query('ltm_pools[].[name, active_member_count, members[*].address]') }}"

    - name: Display active member count list
      debug: var=active_list

    - name: Display count with the least amount of active members
      debug: msg="Minimum active member count from all pools {{ active_list | min }}"

    - name: Force node offline
      bigip_node:
        state: offline
        name: "{{ node }}"
        provider: "{{ provider }}"
        when: active_list | min | int > 1
      delegate_to: localhost

This is the output

(Ansible) BZH $ ansible-playbook -i hosts site.yml
What is the node address? : 172.16.2.1

PLAY [default] **********************************************************************************************************************************************************************

TASK [Collect bigip facts] **********************************************************************************************************************************************************
ok: [192.168.143.154]

TASK [Determine pools the node is in and record their active member counts] *********************************************************************************************************
skipping: [192.168.143.154] => (item=['pool-https-nginx', 0, ['172.16.1.1']])
ok: [192.168.143.154] => (item=['test-pool', 2, ['1.2.3.4', '172.16.1.1', '172.16.2.1', '172.16.2.80']])
ok: [192.168.143.154] => (item=['test_ansible_issue', 2, ['172.16.1.1', '172.16.2.1']])
skipping: [192.168.143.154] => (item=['NGINXPool', 0, ['172.16.1.1']])

TASK [Display active member count list] *********************************************************************************************************************************************
ok: [192.168.143.154] => {
    "active_list": [
        2,
        2
    ]
}

TASK [Display count with the least amount of active members] ************************************************************************************************************************
ok: [192.168.143.154] => {
    "msg": "Minimum active member count from all pools 2"
}

TASK [Force node offline] ***********************************************************************************************************************************************************
changed: [192.168.143.154]

PLAY RECAP **************************************************************************************************************************************************************************
192.168.143.154            : ok=5    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Here we can see that the node has been disabled as expected. I've done some more tests and if a pool contain only the node that is about to be disabled, then nothing will happen. This will help making sure that you won't bring any service down

[vijayravi17]

Thank you for your response. Let me try this today and get back to you.

[vijayravi17]

i've tried your code: BIG-IP v14.1 Ansible Collection 1.8.1 (you need to switch from bigip_device_fact to bigip_device_info)

---

- hosts: default
  gather_facts: false
  vars: 
    provider:
      server: 192.168.143.154
      user: admin
      password: xxxxxxx
      validate_certs: no
      server_port: 443
    active_list: []

  vars_prompt:

    - name: node
      prompt: "What is the node address? "
      private: no

  tasks:

    - name: Collect bigip facts
      bigip_device_info:
        gather_subset:
          - ltm-pools
        provider: "{{ provider }}"
      register: pools
      delegate_to: localhost

    - name: Determine pools the node is in and record their active member counts
      set_fact:
        active_list: "{{ active_list + [item[1]] }}"
      when: node in item[2]
      loop: "{{ pools | json_query('ltm_pools[].[name, active_member_count, members[*].address]') }}"

    - name: Display active member count list
      debug: var=active_list

    - name: Display count with the least amount of active members
      debug: msg="Minimum active member count from all pools {{ active_list | min }}"

    - name: Force node offline
      bigip_node:
        state: offline
        name: "{{ node }}"
        provider: "{{ provider }}"
        when: active_list | min | int > 1
      delegate_to: localhost

This is the output

(Ansible) BZH $ ansible-playbook -i hosts site.yml
What is the node address? : 172.16.2.1

PLAY [default] **********************************************************************************************************************************************************************

TASK [Collect bigip facts] **********************************************************************************************************************************************************
ok: [192.168.143.154]

TASK [Determine pools the node is in and record their active member counts] *********************************************************************************************************
skipping: [192.168.143.154] => (item=['pool-https-nginx', 0, ['172.16.1.1']])
ok: [192.168.143.154] => (item=['test-pool', 2, ['1.2.3.4', '172.16.1.1', '172.16.2.1', '172.16.2.80']])
ok: [192.168.143.154] => (item=['test_ansible_issue', 2, ['172.16.1.1', '172.16.2.1']])
skipping: [192.168.143.154] => (item=['NGINXPool', 0, ['172.16.1.1']])

TASK [Display active member count list] *********************************************************************************************************************************************
ok: [192.168.143.154] => {
    "active_list": [
        2,
        2
    ]
}

TASK [Display count with the least amount of active members] ************************************************************************************************************************
ok: [192.168.143.154] => {
    "msg": "Minimum active member count from all pools 2"
}

TASK [Force node offline] ***********************************************************************************************************************************************************
changed: [192.168.143.154]

PLAY RECAP **************************************************************************************************************************************************************************
192.168.143.154            : ok=5    changed=1    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Here we can see that the node has been disabled as expected. I've done some more tests and if a pool contain only the node that is about to be disabled, then nothing will happen. This will help making sure that you won't bring any service down

While I try this, I am getting this below error. Please help.

['pool_analyticsuatu-inside_gpsflex_8443', 1, ['10.0.0.1']]) skipping: [localhost] => (item=['pool_analyticsuatu-inside_gpsws_8443', 0, ['10.10.20.10', '10.90.80.90']]) skipping: [localhost] => (item=['pool_aperekdev-inside_443', 0, ['10.20.30.40']]) fatal: [localhost]: FAILED! => {"msg": "The conditional check 'node in item[2]' failed. The error was: Unexpected templating type error occurred on ({% if node in item[2] %} True {% else %} False {% endif %}): argument of type 'NoneType' is not iterable\n\nThe error appears to be in '/root/serverdecom/F5Virtual.yml': line 30, 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: Determine pools the node is in and record their active member counts\n ^ here\n"}

PLAY RECAP ************************************************************************************************************************************************************* localhost : ok=1 changed=0 unreachable=0 failed=1 skipped=0 rescued=0 ignored=0

[VishalVinu]

Hey, As I am facing error when node checks with the member[*].address as some pools have zero members. So I have now trying to create a path to check with node and now it doesn't need to be empty. Please anyone check whether it can be run or can be fixed. Thanks in advance

---

- hosts: localhost
  gather_facts: false
  vars:
    provider:
      server: admin
      user: nes
      password: "********" 
      validate_certs: no
    path: []

  vars_prompt:

    - name: node
      prompt: "What is the node address? "
      private: no

  tasks:

    - name: Collect bigip facts for Pool name
      bigip_device_info:
        gather_subset:
          - ltm-pools
        provider: "{{ provider }}"
      register: pools
      delegate_to: localhost


    - name: Determine Pool name using Node IP
      set_fact:
        path: "{{ path + [ item[1]] }}"
      when node in path []
      loop: "{{ pools | json_query('ltm_pools[].[name, members[*].address]')}}"
      
    - name: Display the Var
      debug: var=path

[KrithikaChidambaram]

Closing this now. Reopen if you still face the issue. Thanks!