Merge pull request #3101 from dgoodwin/pre-post-master-hook

Implement simple hooks pre/post master upgrade.

inventory/byo/hosts.origin.example

@@ -89,6 +89,25 @@ openshift_release=v1.4
 # Skip upgrading Docker during an OpenShift upgrade, leaves the current Docker version alone.
 # docker_upgrade=False
 
+
+# Upgrade Hooks
+#
+# Hooks are available to run custom tasks at various points during a cluster
+# upgrade. Each hook should point to a file with Ansible tasks defined. Suggest using
+# absolute paths, if not the path will be treated as relative to the file where the
+# hook is actually used.
+#
+# Tasks to run before each master is upgraded.
+# openshift_master_upgrade_pre_hook=/usr/share/custom/pre_master.yml
+#
+# Tasks to run to upgrade the master. These tasks run after the main openshift-ansible
+# upgrade steps, but before we restart system/services.
+# openshift_master_upgrade_hook=/usr/share/custom/master.yml
+#
+# Tasks to run after each master is upgraded and system/services have been restarted.
+# openshift_master_upgrade_post_hook=/usr/share/custom/post_master.yml
+
+
 # Alternate image format string, useful if you've got your own registry mirror
 #oreg_url=example.com/openshift3/ose-${component}:${version}
 # If oreg_url points to a registry other than registry.access.redhat.com we can

inventory/byo/hosts.ose.example

@@ -89,6 +89,25 @@ openshift_release=v3.4
 # Skip upgrading Docker during an OpenShift upgrade, leaves the current Docker version alone.
 # docker_upgrade=False
 
+
+# Upgrade Hooks
+#
+# Hooks are available to run custom tasks at various points during a cluster
+# upgrade. Each hook should point to a file with Ansible tasks defined. Suggest using
+# absolute paths, if not the path will be treated as relative to the file where the
+# hook is actually used.
+#
+# Tasks to run before each master is upgraded.
+# openshift_master_upgrade_pre_hook=/usr/share/custom/pre_master.yml
+#
+# Tasks to run to upgrade the master. These tasks run after the main openshift-ansible
+# upgrade steps, but before we restart system/services.
+# openshift_master_upgrade_hook=/usr/share/custom/master.yml
+#
+# Tasks to run after each master is upgraded and system/services have been restarted.
+# openshift_master_upgrade_post_hook=/usr/share/custom/post_master.yml
+
+
 # Alternate image format string, useful if you've got your own registry mirror
 #oreg_url=example.com/openshift3/ose-${component}:${version}
 # If oreg_url points to a registry other than registry.access.redhat.com we can

playbooks/common/openshift-cluster/upgrades/upgrade_control_plane.yml

@@ -51,6 +51,8 @@
   roles:
   - openshift_master_facts
 
+# The main master upgrade play. Should handle all changes to the system in one pass, with
+# support for optional hooks to be defined.
 - name: Upgrade master
   hosts: oo_masters_to_config
   vars:
@@ -62,6 +64,14 @@
   roles:
   - openshift_facts
   post_tasks:
+
+  # Run the pre-upgrade hook if defined:
+  - debug: msg="Running master pre-upgrade hook {{ openshift_master_upgrade_pre_hook }}"
+    when: openshift_master_upgrade_pre_hook is defined
+
+  - include: "{{ openshift_master_upgrade_pre_hook }}"
+    when: openshift_master_upgrade_pre_hook is defined
+
   - include: rpm_upgrade.yml component=master
     when: not openshift.common.is_containerized | bool
 
@@ -102,12 +112,26 @@
       state: link
     when: ca_crt_stat.stat.isreg and not ca_bundle_stat.stat.exists
 
+  # Run the upgrade hook prior to restarting services/system if defined:
+  - debug: msg="Running master upgrade hook {{ openshift_master_upgrade_hook }}"
+    when: openshift_master_upgrade_hook is defined
+
+  - include: "{{ openshift_master_upgrade_hook }}"
+    when: openshift_master_upgrade_hook is defined
+
   - include: ../../openshift-master/restart_hosts.yml
     when: openshift.common.rolling_restart_mode == 'system'
 
   - include: ../../openshift-master/restart_services.yml
     when: openshift.common.rolling_restart_mode == 'services'
 
+  # Run the post-upgrade hook if defined:
+  - debug: msg="Running master post-upgrade hook {{ openshift_master_upgrade_post_hook }}"
+    when: openshift_master_upgrade_post_hook is defined
+
+  - include: "{{ openshift_master_upgrade_post_hook }}"
+    when: openshift_master_upgrade_post_hook is defined
+
   - set_fact:
       master_update_complete: True