Change error when draining a node with Pod Disruption Budget

[OttaviaB]

SUMMARY

When k8s_drain tries to evict a pod which cannot be evicted due to a pod disruption budget an error "Too Many Requests" is returned.
Changing this message to something more meaningful would make it easier to work with retries/until loops in an Ansible playbook to drain the node.

ISSUE TYPE

• Feature Idea

COMPONENT NAME

kubernetes.core.k8s_drain

ADDITIONAL INFORMATION

Current behaviour:

TASK [Drain node] *************************************************************************
Montag 25 November 2024  09:37:09 +0100 (0:00:00.015)       0:00:00.015 ******* 
fatal: [host -> localhost]: FAILED! => {"changed": false, "msg": "Failed to delete pod kube-public/draintest-6b84677b99-c6s5w due to: Too Many Requests"}

Proposed behaviour:

TASK [Drain node] *************************************************************************
Montag 25 November 2024  09:20:28 +0100 (0:00:00.014)       0:00:00.014 ******* 
fatal: [host -> localhost]: FAILED! => {"changed": false, "msg": "Failed to delete pod kube-public/draintest-6b84677b99-9jf7m due to: Cannot evict pod as it would violate the pod's disruption budget."}

---
- hosts: "{{ target }}"
  serial: 1
  gather_facts: false
  tasks:
    - name: Drain node
        kubernetes.core.k8s_drain:
        kubeconfig: "{{ kubeconfig_path }}"
        name: "{{ inventory_hostname }}"
        delete_options:
            ignore_daemonsets: true
            delete_emptydir_data: true
            wait_timeout: 100
            disable_eviction: false
            wait_sleep: 1
        delegate_to: localhost

See also:

#711

kubernetes/kubernetes#106286