CODEWITHSUNDEEP
ansibleansible-2.xansible-inventory
Bhavana67
Bhavana67

Reputation: 116

Ansible - Deploy to same host with using mutiple values for same variable

Ansible version : 2.4.2.0

I'm using a directory as my inventory which has 2 files - a , b

File a
[frontend] hostname001 [frontend:vars] envt=frontend

File b
[backend] hostname001 [backend:vars] envt=backend

The value of variable is overriden and only backend persists.

Playbook sample
- name: Sample play hosts: '{{ group }}' connection: local tasks: - name: "Do a demo" debug: msg: 'The envt is {{envt}}'

When i try to deploy frontend by passing group=frontend as extravar, output is as follows

ok: [hostname001] => { "msg": "The envt is backend" }


How can i make sure the right variable is picked.

Upvotes: 1

Views: 549

Answers (1)

larsks
larsks

Reputation: 311721

The problem is that regardless of how you set the group variable, your host hostname001 is still a member of both groups. You're going to need to approach this using a different method.

One option would be to simply move the variable out of your inventory and have a couple of separate variable files that you use with the -e option. E.g., you might call ansible-playbook like this:

ansible-playbook playbook.yml -e @config1.yml

Or:

ansible-playbook playbook.yml -e @config2.yml

Alternately, maybe you could set the variable per-play instead of per-group.

As a final option, you could given the target host a different name in each group. E.g., something like:

[backend]
hostname001-backend ansible_host=hostname001

[backend:vars]
envt=backend

[frontend]
hostname001-frontend ansible_host=hostname001

[frontend:vars]
envt=frontend

Using that inventory, we see:

$ ansible-playbook playbook.yml -e group=frontend

PLAY [Sample play] ***************************************************************************

TASK [Do a demo] *****************************************************************************
ok: [hostname001-frontend] => {
    "msg": "The envt is frontend"
}

PLAY RECAP ***********************************************************************************
hostname001-frontend       : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

$ ansible-playbook playbook.yml -e group=backend

PLAY [Sample play] ***************************************************************************

TASK [Do a demo] *****************************************************************************
ok: [hostname001-backend] => {
    "msg": "The envt is backend"
}

PLAY RECAP ***********************************************************************************
hostname001-backend        : ok=1    changed=0    unreachable=0    failed=0    skipped=0    rescued=0    ignored=0

Upvotes: 4

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