Always setting hostname on all nodes of the cluster (on-prem fix) (#1509

)

* common: always setting hostname on all nodes of the cluster (on-prem fix)

* updating 0.7.1 changelog

CHANGELOG-0.7.md

@@ -19,6 +19,7 @@
 - [#802](https://github.com/epiphany-platform/epiphany/issues/802) - Docker version is hard-coded in installation tasks
 - [#1495](https://github.com/epiphany-platform/epiphany/issues/1495) - Offline installation is broken for CentOS 7.8 environments
 - [#1347](https://github.com/epiphany-platform/epiphany/issues/1347) - [BUG] Kibana config always points its elasticsearch.hosts to a "logging" VM
+- [#1336](https://github.com/epiphany-platform/epiphany/issues/1336) - Deployment of version 0.7.0 failed on-prem (spec.hostname)
 
 ### Added
 

core/src/epicli/data/common/ansible/playbooks/roles/common/tasks/main.yml

@@ -114,9 +114,7 @@
   tags:
     - security
 
-- include_tasks: aws-hostname.yml
-  when:
-    - provider == "aws"
+- include_tasks: set-hostname.yml
 
 - name: Include logrotate configuration tasks
   include_tasks: configure-logrotate.yml

core/src/epicli/data/common/ansible/playbooks/roles/common/tasks/set-hostname.yml

@@ -0,0 +1,16 @@
+---
+# "Changing the hostname always" seems to be working because we always put
+# all of the play hosts inside /etc/hosts files on every cluster node.
+# It makes an illusion that Epiphany has control over DNS inside the underlying network.
+- name: Set hostname
+  hostname:
+    name: '{{ inventory_hostname }}'
+
+# https://aws.amazon.com/premiumsupport/knowledge-center/linux-static-hostname-rhel7-centos7/
+- name: Disable AWS cloud hostname
+  lineinfile:
+    dest: /etc/cloud/cloud.cfg
+    line: 'preserve_hostname: true'
+    state: present
+  when:
+    - provider == "aws"