consolidate etcd_migrate role

1 files changed, 32 insertions, 0 deletions

diff --git a/roles/etcd/tasks/migration/check_cluster_status.yml b/roles/etcd/tasks/migration/check_cluster_status.yml
new file mode 100644
index 000000000..b69fb5a52
--- /dev/null
+++ b/roles/etcd/tasks/migration/check_cluster_status.yml
@@ -0,0 +1,32 @@
+---
+# etcd_ip originates from etcd_common role
+- name: Check cluster status
+  command: >
+    etcdctl --cert {{ etcd_peer_cert_file }} --key {{ etcd_peer_key_file }} --cacert {{ etcd_peer_ca_file }} --endpoints 'https://{{ etcd_peer }}:{{ etcd_client_port }}' -w json endpoint status
+  environment:
+    ETCDCTL_API: 3
+  register: l_etcd_cluster_status
+
+- name: Retrieve raftIndex
+  set_fact:
+    etcd_member_raft_index: "{{ (l_etcd_cluster_status.stdout | from_json)[0]['Status']['raftIndex'] }}"
+
+- block:
+  # http://docs.ansible.com/ansible/playbooks_filters.html#extracting-values-from-containers
+  - name: Group all raftIndices into a list
+    set_fact:
+      etcd_members_raft_indices: "{{ groups['oo_etcd_to_migrate'] | map('extract', hostvars, 'etcd_member_raft_index') | list | unique }}"
+
+  - name: Check the minimum and the maximum of raftIndices is at most 1
+    set_fact:
+      etcd_members_raft_indices_diff: "{{ ((etcd_members_raft_indices | max | int) - (etcd_members_raft_indices | min | int)) | int }}"
+
+  - debug:
+      msg: "Raft indices difference: {{ etcd_members_raft_indices_diff }}"
+
+  when: inventory_hostname in groups.oo_etcd_to_migrate[0]
+
+# The cluster raft status is ok if the difference of the max and min raft index is at most 1
+- name: capture the status
+  set_fact:
+    l_etcd_cluster_status_ok: "{{ hostvars[groups.oo_etcd_to_migrate[0]]['etcd_members_raft_indices_diff'] | int < 2 }}"