kubespray/roles/vault/tasks/shared/check_etcd.yml

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---
- name: check_etcd | Check if etcd is up an reachable
uri:
url: "{{ vault_etcd_url }}/health"
validate_certs: no
failed_when: false
register: vault_etcd_health_check
- name: check_etcd | Set fact based off the etcd_health_check response
set_fact:
vault_etcd_available: "{{ vault_etcd_health_check.get('json', {}).get('health')|bool }}"
- name: check_etcd | Fail if etcd is not available and needed
fail:
msg: >
Unable to start Vault cluster! Etcd is not available at
{{ vault_etcd_url }} however it is needed by Vault as a backend.
when: vault_etcd_needed|d() and not vault_etcd_available