Add Centos GPG key custom url

When using a custom repo with repo_centos_epel_mirror, you maybe need to
change the gpg key url because offline env

You can use this variable: repo_centos_epel_key

Change-Id: I9bb305d866f3d65653b95a25a5b9f5ecde5af0b0

defaults/main.yml

@@ -23,6 +23,10 @@ repo_nginx_threads: "{{ [[ansible_processor_vcpus|default(2) // 2, 1] | max, rep
 ## APT Cache Options
 cache_timeout: 600
 
+## Centos EPEL repository options
+repo_centos_epel_mirror: "{{ centos_epel_mirror | default('http://download.fedoraproject.org/pub/epel') }}"
+repo_centos_epel_key: "{{ centos_epel_key | default('http://download.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-7') }}"
+
 # Set the package install state for distribution and pip packages
 # Options are 'present' and 'latest'
 repo_server_package_state: "latest"
@@ -47,4 +51,4 @@ repo_git_cache_dirname: openstackgit
 repo_git_cache_dir: "{{ repo_service_home_folder }}/repo/{{ repo_git_cache_dirname }}"
 
 # Set the log directory
-repo_service_log_dir: /var/log/apt-cacher-ng
+repo_service_log_dir: /var/log/apt-cacher-ng

releasenotes/notes/centos-private-epel-3fe4c9ff68ec3a18.yaml

@@ -0,0 +1,6 @@
+---
+features:
+  - You can set a private repository for epel, you must use
+    ``repo_centos_epel_mirror`` for the repo URL and if you need to get the GPG
+    key from intranet or a mirror use ``repo_centos_epel_key`` for gpg key
+    location.

tasks/repo_install.yml

@@ -15,7 +15,7 @@
 
 - name: Install EPEL gpg keys
   rpm_key:
-    key: "http://dl.fedoraproject.org/pub/epel/RPM-GPG-KEY-EPEL-7"
+    key: "{{ repo_centos_epel_key }}"
     state: present
   when:
     - ansible_pkg_mgr in ['yum', 'dnf']
@@ -27,7 +27,7 @@
 - name: Install the EPEL repository
   yum_repository:
     name: epel-repo_server
-    baseurl: "{{ (centos_epel_mirror | default ('http://download.fedoraproject.org/pub/epel')) ~ '/' ~ ansible_distribution_major_version ~ '/' ~ ansible_architecture }}"
+    baseurl: "{{ repo_centos_epel_mirror ~ '/' ~ ansible_distribution_major_version ~ '/' ~ ansible_architecture }}"
     description: 'Extra Packages for Enterprise Linux 7 - $basearch'
     gpgcheck: yes
     enabled: yes