Use existing OPENSHIFT_DEFAULT_REGISTRY setting during masters scaleup

Fixes a bug which reported that AFTER a cluster upgrade from OCP 3.5
to 3.6, any masters which are later added via the scaleup playbooks
are setting a value for OPENSHIFT_DEFAULT_REGISTRY which is
inconsistent with the already configured masters.

* OPENSHIFT_DEFAULT_REGISTRY value is saved from oo_first_master
* The new scaleup master has a fact set noting it is a scaleup host
* The saved OPENSHIFT_DEFAULT_REGISTRY value is used instead of the
  default for 3.6, which is to use a hard-coded registry value of
  'docker-registry.default.svc:5000'

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=1469336

5 files changed, 16 insertions, 6 deletions

diff --git a/roles/openshift_master/tasks/systemd_units.yml b/roles/openshift_master/tasks/systemd_units.yml
index dfc255b3d..d71ad3459 100644
--- a/roles/openshift_master/tasks/systemd_units.yml
+++ b/roles/openshift_master/tasks/systemd_units.yml
@@ -23,7 +23,7 @@
   when: openshift.common.is_containerized | bool and not openshift.common.is_master_system_container | bool
 
 # workaround for missing systemd unit files
-- name: Create the systemd unit files
+- name: "Create the {{ openshift.common.service_type }} systemd unit file"
   template:
     src: "master_docker/master.docker.service.j2"
     dest: "{{ containerized_svc_dir }}/{{ openshift.common.service_type }}-master.service"
@@ -32,7 +32,7 @@
   - not openshift.common.is_master_system_container | bool
   register: create_master_unit_file
 
-- name: Install Master service file
+- name: "Install {{ openshift.common.service_type }} systemd unit file"
   copy:
     dest: "/etc/systemd/system/{{ openshift.common.service_type }}-master.service"
     src: "{{ openshift.common.service_type }}-master.service"
@@ -44,7 +44,7 @@
 - command: systemctl daemon-reload
   when: create_master_unit_file | changed
 
-- name: Create the ha systemd unit files
+- name: Create the ha systemd unit files for api and controller services
   template:
     src: "{{ ha_svc_template_path }}/atomic-openshift-master-{{ item }}.service.j2"
     dest: "{{ containerized_svc_dir }}/{{ openshift.common.service_type }}-master-{{ item }}.service"
diff --git a/roles/openshift_master/templates/atomic-openshift-master.j2 b/roles/openshift_master/templates/atomic-openshift-master.j2
index 850fae0e4..b931f1414 100644
--- a/roles/openshift_master/templates/atomic-openshift-master.j2
+++ b/roles/openshift_master/templates/atomic-openshift-master.j2
@@ -1,6 +1,9 @@
 OPTIONS=--loglevel={{ openshift.master.debug_level | default(2) }}
 CONFIG_FILE={{ openshift_master_config_file }}
-{% if openshift_push_via_dns | default(false) %}
+{# Preserve existing OPENSHIFT_DEFAULT_REGISTRY settings in scale up runs #}
+{% if openshift_master_is_scaleup_host %}
+{{ openshift_master_default_registry_value }}
+{% elif openshift_push_via_dns | default(false) %}
 OPENSHIFT_DEFAULT_REGISTRY=docker-registry.default.svc:5000
 {% endif %}
 {% if openshift.common.is_containerized | bool %}
diff --git a/roles/openshift_master/templates/native-cluster/atomic-openshift-master-api.j2 b/roles/openshift_master/templates/native-cluster/atomic-openshift-master-api.j2
index c05a27559..63eb3ea1b 100644
--- a/roles/openshift_master/templates/native-cluster/atomic-openshift-master-api.j2
+++ b/roles/openshift_master/templates/native-cluster/atomic-openshift-master-api.j2
@@ -1,6 +1,9 @@
 OPTIONS=--loglevel={{ openshift.master.debug_level }} --listen={{ 'https' if openshift.master.api_use_ssl else 'http' }}://{{ openshift.master.bind_addr }}:{{ openshift.master.api_port }} --master={{ openshift.master.loopback_api_url }}
 CONFIG_FILE={{ openshift_master_config_file }}
-{% if openshift_push_via_dns | default(false) %}
+{# Preserve existing OPENSHIFT_DEFAULT_REGISTRY settings in scale up runs #}
+{% if openshift_master_is_scaleup_host %}
+{{ openshift_master_default_registry_value_api }}
+{% elif openshift_push_via_dns | default(false) %}
 OPENSHIFT_DEFAULT_REGISTRY=docker-registry.default.svc:5000
 {% endif %}
 {% if openshift.common.is_containerized | bool %}
diff --git a/roles/openshift_master/templates/native-cluster/atomic-openshift-master-controllers.j2 b/roles/openshift_master/templates/native-cluster/atomic-openshift-master-controllers.j2
index a153fb33d..cdf2252f8 100644
--- a/roles/openshift_master/templates/native-cluster/atomic-openshift-master-controllers.j2
+++ b/roles/openshift_master/templates/native-cluster/atomic-openshift-master-controllers.j2
@@ -1,6 +1,9 @@
 OPTIONS=--loglevel={{ openshift.master.debug_level }} --listen={{ 'https' if openshift.master.api_use_ssl else 'http' }}://{{ openshift.master.bind_addr }}:{{ openshift.master.controllers_port }}
 CONFIG_FILE={{ openshift_master_config_file }}
-{% if openshift_push_via_dns | default(false) %}
+{# Preserve existing OPENSHIFT_DEFAULT_REGISTRY settings in scale up runs #}
+{% if openshift_master_is_scaleup_host %}
+{{ openshift_master_default_registry_value_controllers }}
+{% elif openshift_push_via_dns | default(false) %}
 OPENSHIFT_DEFAULT_REGISTRY=docker-registry.default.svc:5000
 {% endif %}
 {% if openshift.common.is_containerized | bool %}
diff --git a/roles/openshift_master/vars/main.yml b/roles/openshift_master/vars/main.yml
index c5ba20409..7745d014f 100644
--- a/roles/openshift_master/vars/main.yml
+++ b/roles/openshift_master/vars/main.yml
@@ -20,3 +20,4 @@ openshift_master_valid_grant_methods:
 - deny
 
 l_is_ha: "{{ openshift.master.ha is defined and openshift.master.ha | bool }}"
+openshift_master_is_scaleup_host: False