How to Ignore warnings in ansible

Question

I have been trying to ignore a warning while writing playbooks the scenario is i execute this virt-host-validate qemu and it throws up one single warning like as below.

root@n0:~/playbook_promenade# virt-host-validate 
QEMU: Checking for hardware virtualization : PASS
QEMU: Checking if device /dev/kvm exists :PASS
QEMU: Checking if device /dev/kvm is accessible : PASS
QEMU: Checking if device /dev/vhost-net exists : PASS
QEMU: Checking if device /dev/net/tun exists : PASS
QEMU: Checking for cgroup 'memory' controller support : PASS
QEMU: Checking for cgroup 'memory' controller mount-point : PASS
QEMU: Checking for cgroup 'cpu' controller support : PASS
QEMU: Checking for cgroup 'cpu' controller mount-point: PASS
QEMU: Checking for cgroup 'cpuacct' controller support : PASS
QEMU: Checking for cgroup 'cpuacct' controller mount-point : PASS
QEMU: Checking for cgroup 'devices' controller support : PASS
QEMU: Checking for cgroup 'devices' controller mount-point : PASS
QEMU: Checking for cgroup 'net_cls' controller support : PASS
QEMU: Checking for cgroup 'net_cls' controller mount-point : PASS
QEMU: Checking for cgroup 'blkio' controller support : PASS
QEMU: Checking for cgroup 'blkio' controller mount-point : PASS
QEMU: Checking for device assignment IOMMU support  : WARN (No ACPI DMAR table found, IOMMU either disabled in BIOS or not supported by this hardware platform)`

The playbook i have written is as follows.

`- hosts: localhost
   sudo: yes
   tasks:
    - name: Check if Host supports Virtualization.
      command: virt-host-validate qemu 
      ignore_errors: yes
      failed_when: false
      changed_when: false
      register: host_status
    - debug:
       msg: "status: {{host_status.stdout}}"`

now the worrying part is if there is any other task failing apart from the warn this playbook continues as we are using ignore_errors: yes can anyone please guide me how to fix it ?? thanks in advance.

Solution

I could fix it with this.

  tasks:
   - name: Check if Host supports Virtualization.
     command: virt-host-validate qemu
     register: command_result
     failed_when:
       - "'FAIL' in command_result.stderr"

Comments

[Carolus]

Maybe it is also works if the last line is - command_result is failed instead.