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<https://stackoverflow.com/questions/47330287/or-condition-in-ansible-skips-the-hosts-that-are-not-matched-in-condition/47330708#>
I am trying to check memory consumption of four machines and any of the
machines memory consumption is less than 10 GB I want to restart services
on all machines.
I have used or operator in when condition, I am able to restart the
services only on the ones that have memory less than 10 GB others get
skipped. My requirement is if any of the hosts memory goes down below 10GB
I want services to be restarted on all machines not just on machines that
have memory below 10GB.
Below is the Ansible playbook:
- hosts: webapp
become: true
become_method: sudo
gather_facts: yes
vars:
servers:
"10.0.0.1": "machine1"
"10.0.0.2": "machine2"
"10.0.0.3": "machine3"
"10.0.0.4": "machine4"
tasks:
- name: get mem free for machine1
shell: free -g | grep Mem | awk '{print $4}'
register: machine1_mem
- debug: var=machine1_mem.stdout
when: servers[ansible_default_ipv4.address] == "machine1"
- name: get mem free for machine2
shell: free -g | grep Mem | awk '{print $4}'
register: machine2_mem
- debug: var=machine2_mem.stdout
when: servers[ansible_default_ipv4.address] == "machine2"
- name: get mem free for machine3
shell: free -g | grep Mem | awk '{print $4}'
register: machine3_mem
- debug: var=machine3_mem.stdout
when: servers[ansible_default_ipv4.address] == "machine3"
- name: get mem free for machine4
shell: free -g | grep Mem | awk '{print $4}'
register: machine4_mem
- debug: var=machine4_mem.stdout
when: servers[ansible_default_ipv4.address] == "machine4"
- name: restart web services
when: ( machine4_mem.stdout|int <= 10 or machine1_mem.stdout|int <= 10 or
machine3_mem.stdout|int <= 10 or machine2_mem.stdout|int <= 10 )
action: service name=httpd state=restarted
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