Fix scaling (#5889) (#5911)

* etcd: etcd-events doesn't depend on etcd_cluster_setup

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* etcd: remove condition already present on include_tasks

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* etcd: fix scaling up

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* etcd: use *access_addresses, do not delegate to etcd[0]

We want to wait for the full cluster to be healthy,
so use all the cluster addresses
Also we should be able to run the playbook when etcd[0] is down
(not tested), so do not delegate to etcd[0]

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* etcd: use failed_when for health check

unhealthy cluster is expected on first run, so use failed_when
instead of ignore_errors to remove scary red messages

Also use run_once

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* kubernetes/preinstall: ensure ansible_fqdn is up to date after changing /etc/hosts

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>

* kubernetes/master: regenerate apiserver cert if needed

Signed-off-by: Etienne Champetier <champetier.etienne@gmail.com>
(cherry picked from commit a35b6dc1af)

roles/etcd/tasks/join_etcd_member.yml

@@ -5,7 +5,6 @@
   until: member_add_result.rc == 0
   retries: 4
   delay: "{{ retry_stagger | random + 3 }}"
-  when: target_node == inventory_hostname
   environment:
     ETCDCTL_CERT_FILE: "{{ etcd_cert_dir }}/admin-{{ inventory_hostname }}.pem"
     ETCDCTL_KEY_FILE: "{{ etcd_cert_dir }}/admin-{{ inventory_hostname }}-key.pem"
@@ -22,7 +21,6 @@
           {{ etcd_member_name }}={{ etcd_peer_url }}
         {%- endif -%}
       {%- endfor -%}
-  when: target_node == inventory_hostname
 
 - name: Join Member | Ensure member is in etcd cluster
   shell: "{{ bin_dir }}/etcdctl --no-sync --endpoints={{ etcd_access_addresses }} member list | grep -q {{ etcd_access_address }}"
@@ -31,8 +29,13 @@
   check_mode: no
   tags:
     - facts
-  when: target_node == inventory_hostname
   environment:
     ETCDCTL_CERT_FILE: "{{ etcd_cert_dir }}/admin-{{ inventory_hostname }}.pem"
     ETCDCTL_KEY_FILE: "{{ etcd_cert_dir }}/admin-{{ inventory_hostname }}-key.pem"
     ETCDCTL_CA_FILE: "{{ etcd_cert_dir }}/ca.pem"
+
+- name: Configure | Ensure etcd is running
+  service:
+    name: etcd
+    state: started
+    enabled: yes