Add support for OSP15/RHEL 8

Added support for OSP15/RHEL 8:

- Add variables for rhos_release_rpm and osp_release to allow the user
  install the rhosp15 brew repository on the overcloud. This is a
  temporary work around because there is no collectd plugins in the
  main rhosp repository yet and there is no EPEL8.
- Disable collectd_from_epel when you are running the ansible playbook
  on RHEL8.
- Install the normal collectd rpm packages on RHEL8, but also
  add collectd-disk and collectd-python because they do not get
  installed properly when a user is just installing collectd.
  Without these RPMs installed collectd will fail to install.
- Disable dont install ODL monitoring for RHEL8. This should be removed
  in a seperate commit.

Change-Id: Ie79e940516fb33e6b874f100013a25090fedbed2
Signed-off-by: Charles Short <chucks@redhat.com>

ansible/install/group_vars/all.yml

@@ -152,6 +152,12 @@ collectd_objectstorage: true
 collectd_cephstorage: true
 collectd_compute: false
 
+#######################################
+# OSP15 Collectd Configuration
+######################################
+rhos_release_rpm:
+osp_release: 15
+
 # Opt-In Collectd plugins configuration:
 ########################
 # Apache plugin

ansible/install/group_vars/zuul_all.yml

@@ -152,6 +152,12 @@ collectd_objectstorage: true
 collectd_cephstorage: true
 collectd_compute: false
 
+#######################################
+# OSP15 Collectd Configuration
+#######################################
+rhos_release_rpm:
+osp_release: 15
+
 # Opt-In Collectd plugins configuration:
 ########################
 # Apache plugin

ansible/install/roles/collectd-openstack/tasks/main.yml

@@ -15,18 +15,25 @@
     - collectd-ceph
     - collectd-mysql
     - collectd-turbostat
-  when: collectd_from_epel
+  when: collectd_from_epel and ansible_distribution_major_version < '8'
 
 - name: Clean Non-EPEL collectd configuration
   shell: "rm -rf /etc/collectd.d/*.conf"
   become: true
-  when: collectd_from_epel
+  when: collectd_from_epel and ansible_distribution_major_version < '8'
+
+- name: Enable OSP repos for controller, compute
+  shell: |
+    dnf install -y {{ rhos_release_rpm }}
+    rhos-release {{ osp_release }}
+  when: "('controller' in group_names) or ('compute' in group_names) and ansible_distribution_major_version == '8'"
+  become: yes
 
 #
 # (akrzos) yum module works at this point due to the fact the EPEL repo now exists.  EPEL rpm is
 # installed at this point in time.
 #
-- name: Install collectd rpms
+- name: Install collectd rpms for centos
   yum:
     name: "{{ item }}"
     state: present
@@ -40,7 +47,27 @@
     - collectd-mysql
     - collectd-ping
     - collectd-turbostat
-  when: collectd_from_epel
+  when: collectd_from_epel and ansible_distribution_major_version < '8'
+
+#
+# (zul) Remove rhelosp15-0-brew when EPEL 8 exists
+#
+- name: Install collectd rpms for centos
+  dnf:
+    name: "{{ item }}"
+    state: present
+    enablerepo: "rhelosp-15.0-brew, rhelosp-15.0-trunk-brew"
+  become: true
+  with_items:
+    - collectd
+    - collectd-apache
+    - collectd-ceph
+    - collectd-mysql
+    - collectd-ping
+    - collectd-turbostat
+    - collectd-disk
+    - collectd-python
+  when: ansible_distribution_major_version == '8'
 
 # (sai) Since we moved to containers we don't have java installed on the host
 # anymore but it is needed for collectd-java
@@ -52,13 +79,14 @@
     enabled: yes
   become: true
   register: repo_add
-  when: ('controller' in group_names and opendaylight_java_plugin)
+  when: ('controller' in group_names and opendaylight_java_plugin and ansible_distribution_major_version < '8')
 
 - name: Add key
   rpm_key:
     state: present
     key: https://www.centos.org/keys/RPM-GPG-KEY-CentOS-7
   become: true
+  when: ansible_distribution_major_version < '8'
 
 # (sai) Separating out collectd java rpms as they have a lot of dependencies and
 # are only required for ODL monitoring on controllers only
@@ -71,14 +99,14 @@
     - java-1.8.0-openjdk
     - collectd-java
     - collectd-generic-jmx
-  when: (repo_add is success and 'controller' in group_names and opendaylight_java_plugin)
+  when: (repo_add is success and 'controller' in group_names and opendaylight_java_plugin and ansible_distribution_major_version < '8')
 
 - name: Remove repository
   yum_repository:
     name:  CentOS-7-Base
     state: absent
   become: true
-  when: (repo_add is success and 'controller' in group_names and opendaylight_java_plugin)
+  when: (repo_add is success and 'controller' in group_names and opendaylight_java_plugin and ansible_distribution_major_version < '8')
 
 # Iostat plugin requires sysstat since shelling iostat for stats, Also it is
 # handy to have sysstat.