Fix: authenticated registry support for containerized hosts

Currently, openshift-anisble supports authentication to
container registries to pull down openshift container images.
The openshift_verison role uses the docker cli to gather
image information from container registries before authentication
credentials are provided by openshift-ansible.

This commit creates the necessary token to authenticate to
private registries during openshift_version.  The token
is generated by the role 'docker' on all hosts where
docker is installed/configured when oreg_auth_users
is defined.

This commit also adds a read-only mount into the
openshift master and node container services.  This
mount is '/var/lib/origin/.docker:/root/.docker:ro'.
This is because the container images do not currently
read the values in '/var/lib/origin/.docker' as this
may be a bug upstream.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1316341

2 files changed, 26 insertions, 14 deletions

diff --git a/roles/openshift_node/tasks/main.yml b/roles/openshift_node/tasks/main.yml
index 22ff6dfd2..ff8d1942c 100644
--- a/roles/openshift_node/tasks/main.yml
+++ b/roles/openshift_node/tasks/main.yml
@@ -76,20 +76,7 @@
   include: config.yml
   when: not openshift_node_bootstrap
 
-- name: Check for credentials file for registry auth
-  stat:
-    path: "{{oreg_auth_credentials_path }}"
-  when:
-    - oreg_auth_user is defined
-  register: node_oreg_auth_credentials_stat
-
-- name: Create credentials for registry auth
-  command: "docker --config={{ oreg_auth_credentials_path }} login -u {{ oreg_auth_user }} -p {{ oreg_auth_password }} {{ oreg_host }}"
-  when:
-    - oreg_auth_user is defined
-    - (not node_oreg_auth_credentials_stat.stat.exists or oreg_auth_credentials_replace) | bool
-  notify:
-    - restart node
+- include: registry_auth.yml
 
 - name: Configure AWS Cloud Provider Settings
   lineinfile:
diff --git a/roles/openshift_node/tasks/registry_auth.yml b/roles/openshift_node/tasks/registry_auth.yml
new file mode 100644
index 000000000..f370bb260
--- /dev/null
+++ b/roles/openshift_node/tasks/registry_auth.yml
@@ -0,0 +1,25 @@
+---
+- name: Check for credentials file for registry auth
+  stat:
+    path: "{{ oreg_auth_credentials_path }}"
+  when: oreg_auth_user is defined
+  register: node_oreg_auth_credentials_stat
+
+# Container images may need the registry credentials
+- name: Setup ro mount of /root/.docker for containerized hosts
+  set_fact:
+    l_bind_docker_reg_auth: True
+  when:
+    - openshift.common.is_containerized | bool
+    - oreg_auth_user is defined
+    - (not node_oreg_auth_credentials_stat.stat.exists or oreg_auth_credentials_replace) | bool
+  notify:
+    - restart node
+
+- name: Create credentials for registry auth
+  command: "docker --config={{ oreg_auth_credentials_path }} login -u {{ oreg_auth_user }} -p {{ oreg_auth_password }} {{ oreg_host }}"
+  when:
+    - oreg_auth_user is defined
+    - (not node_oreg_auth_credentials_stat.stat.exists or oreg_auth_credentials_replace) | bool
+  notify:
+    - restart node