el7: switch to external_repo install_method

This patch changes the default deployment back to using the
RabbitMQ external repositories.  This restores the behaviour
to the same as the old and ships the 3.7.x series.

We deploy without HiPE by default however our testing is doing
it with HiPE.  This patch drops it so we can actually test
behaviour that we deploy by default.

Change-Id: I49747e104f118ef1fb2bdeb329c92d2f5fb66c56

tasks/install_yum.yml

@@ -13,10 +13,23 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-- name: Fail if installation method is not 'distro'
+- name: Fail if installation method is not 'external_repo'
   fail:
-    msg: "The only supported rabbitmq_install_method for RedHat is 'distro'."
+    msg: "The only supported rabbitmq_install_method for RedHat is 'external_repo'."
-  when: rabbitmq_install_method != 'distro'
+  when: rabbitmq_install_method != 'external_repo'
+
+- name: Configure repositories
+  yum_repository:
+    name: "{{ item.name }}"
+    file: "{{ item.filename }}"
+    description: "{{ item.description }}"
+    baseurl: "{{ item.baseurl }}"
+    gpgcheck: "{{ item.gpgcheck | default('no') }}"
+  with_items:
+    - "{{ rabbitmq_erlang_repo }}"
+    - "{{ rabbitmq_repo }}"
+  tags:
+    - rabbitmq-repos
 
 - name: Install RabbitMQ packages
   yum:

tests/rabbitmq_server-overrides.yml

@@ -2,5 +2,4 @@ rabbitmq_cookie_token: secrete
 rabbitmq_ssl_cert: /etc/rabbitmq/rabbitmq.pem
 rabbitmq_ssl_key: /etc/rabbitmq/rabbitmq.key
 
-rabbitmq_hipe_compile: True
 rabbitmq_apply_openstack_policies: True

vars/redhat.yml

@@ -13,8 +13,22 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-_rabbitmq_install_method: distro
+_rabbitmq_install_method: external_repo
+
+_rabbitmq_repo_url: "https://packagecloud.io/rabbitmq/rabbitmq-server/el/{{ ansible_distribution_major_version }}/$basearch"
+_rabbitmq_repo:
+  name: rabbitmq_rabbitmq-server
+  description: "RabbitMQ Server Rolling Repository"
+  baseurl: "{{ rabbitmq_repo_url }}"
+  filename: RabbitMQ
+
+_rabbitmq_erlang_repo_url: "https://packagecloud.io/rabbitmq/erlang/el/{{ ansible_distribution_major_version }}/$basearch"
+_rabbitmq_erlang_repo:
+  name: rabbitmq_els-erlang
+  description: "RabbitMQ Erlang Packages from Bintray"
+  baseurl: "{{ rabbitmq_erlang_repo_url }}"
+  filename: els-erlang
 
 rabbitmq_distro_packages:
-  - openssl
+  - erlang-22.0.2-1.el7.x86_64
-  - rabbitmq-server
+  - rabbitmq-server-3.7.15-1.el7.noarch