Hard to say. The job log you show doesn't match the tasks in the
playbook you posted. They seem to be the same down to the "Debug
is_leader value" task, but after that the task names in the log don't
match those in the playbook.
In the playbook you posted, task "Add standby host" an task "Add primary
host" both add the hosts to the same group. That may be a source of your
problem. But as we don't see the output for those tasks …, hmm.
—
Todd
On 4/23/24 4:03 PM, 'deewon' via Ansible Project wrote:
ansible version: 2:11.2
jinja version: 3.0.3
python version: 3.6.8
Hello all
I have a peculiar problem with a relatively simple playbook I have
written. It basically checks 2 servers to determine which one has more
than 1 IP and uses that to set a simp;e fact called "is_leader" for
each node.
This fact is then to be used to build an in-memory inventory using
module add_host to iterate through the servers based on the value of
that fact. See below:
- name: Get Server Recycling Order
hosts: "{{ my_servers | default ('localhost') }}"
become: yes
become_method: sudo
become_user: root
tasks:
- name: Set Patching Sequence
tags: always
block:
- name: Get IP addresses of eth0 using nmcli command
command: nmcli -g ip4.address conn show "System eth0"
register: nmcli_output
changed_when: false
- name: Get nmcli output
debug:
var: nmcli_output
- name: Set is_leader variable based on number of IPs
set_fact:
is_leader: "{{ (nmcli_output.stdout.split('|') | length)
> 1 }}"
- name: Display if server is ACTIVE (1) or PASSIVE (0)
debug:
var: is_leader
- name: Debug is_leader value
debug:
msg: "is_leader value for {{ inventory_hostname }} is {{
is_leader }}"
- name: Add standby host
add_host:
name: "{{ inventory_hostname }}"
groups: nodes
when: not is_leader
- name: Add primary host
add_host:
name: "{{ inventory_hostname }}"
groups: nodes
when: is_leader
#- name: Execute tasks on servers in a specified order
# hosts: nodes
# gather_facts: no
# serial: 1
# tasks:
# - name: Run a command in a specified order
# command: echo "Running on {{ inventory_hostname }}"
# tags: always
The problem is that when this runs, the "is_leader" fact is ignored
for when the condition is false and the standby node is not added to
the inventory. The relevant extract from the execution is below:
TASK [Set is_leader variable based on number of IPs]
**************************************************************************************************************************
Tuesday 23 April 2024 19:46:31 +0000 (0:00:00.079) 0:00:16.815 *********
ok: [node-1] => {
"ansible_facts": {
"is_leader": true
},
"changed": false
}
ok: [node-2] => {
"ansible_facts": {
"is_leader": false
},
"changed": false
}
TASK [Display if server is ACTIVE (1) or PASSIVE (0)]
**************************************************************************************************************************
Tuesday 23 April 2024 19:46:31 +0000 (0:00:00.083) 0:00:16.898 *********
ok: [node-1] => {
"is_leader": true
}
ok: [node-2] => {
"is_leader": false
}
TASK [Debug is_leader value]
**************************************************************************************************************************************************
Tuesday 23 April 2024 19:46:31 +0000 (0:00:00.072) 0:00:16.971 *********
ok: [node-1] => {}
MSG:
is_leader value for node-1 is True
ok: [node-2] => {}
MSG:
is_leader value for node-2 is False
TASK [Re-confirm is_leader before adding to group]
****************************************************************************************************************************
Tuesday 23 April 2024 19:46:31 +0000 (0:00:00.074) 0:00:17.045 *********
skipping: [node-1] => {}
ok: [node-2] => {}
MSG:
Preparing to add node-2 to stby group based on is_leader = False
TASK [Add standby proxysql node]
***********************************************************************************************************************************************
Tuesday 23 April 2024 19:46:31 +0000 (0:00:00.088) 0:00:17.134 *********
skipping: [node-1] => {
"changed": false,
"skip_reason": "Conditional result was False"
}
TASK [Re-confirm is_leader before adding to group]
****************************************************************************************************************************
Tuesday 23 April 2024 19:46:31 +0000 (0:00:00.036) 0:00:17.170 *********
ok: [node-1] => {}
MSG:
Preparing to add node-1 to prim group based on is_leader = True
skipping: [node-2] => {}
TASK [Add primary proxysql node]
***********************************************************************************************************************************************
Tuesday 23 April 2024 19:46:31 +0000 (0:00:00.059) 0:00:17.230 *********
changed: [node-1] => {
"add_host": {
"groups": [
"nodes_prim"
],
"host_name": "node-1",
"host_vars": {}
},
"changed": true
}
PLAY RECAP
*********************************************************************************************************************************************************************
localhost : ok=1 changed=0 unreachable=0
failed=0 skipped=0 rescued=0 ignored=0
node-1 : ok=8 changed=1 unreachable=0 failed=0 skipped=2
rescued=0 ignored=0
node-2 : ok=7 changed=0 unreachable=0 failed=0 skipped=1
rescued=0 ignored=0
I'm not sure what I'm missing regarding this behaviour as it seems
like it should simply work?
Thanks
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