purge: do not purge infra pkgs by default (backport #260)

ceph_defaults/defaults/main.yml

@@ -12,11 +12,12 @@ ceph_ibm_key: https://public.dhe.ibm.com/ibmdl/export/pub/storage/ceph/RPM-GPG-K
 ceph_release: quincy
 upgrade_ceph_packages: false
 ceph_pkgs:
-  - chrony
   - cephadm
-  - podman
   - ceph-common
 ceph_client_pkgs:
   - chrony
   - ceph-common
+infra_pkgs:
+  - chrony
+  - podman
 client_group: clients

cephadm-preflight.yml

@@ -189,12 +189,22 @@
           register: result
           until: result is succeeded
 
-        - name: install prerequisites packages
+        - name: install prerequisites packages on servers
           package:
-            name: "{{ ceph_pkgs }}"
+            name: "{{ ceph_pkgs + infra_pkgs }}"
             state: "{{ (upgrade_ceph_packages | bool) | ternary('latest', 'present') }}"
           register: result
           until: result is succeeded
+          when: group_names != [client_group]
+
+        - name: install prerequisites packages on clients
+          package:
+            name: "{{ ceph_client_pkgs }}"
+            state: "{{ (upgrade_ceph_packages | bool) | ternary('latest', 'present') }}"
+          register: result
+          until: result is succeeded
+          when: group_names == [client_group]
+
 
         - name: ensure chronyd is running
           service:

cephadm-purge-cluster.yml

@@ -9,7 +9,7 @@
 #
 # Usage:
 #
-# ansible-playbook -i <inventory host file> cephadm-purge-cluster.yml -e fsid=<your fsid>
+# ansible-playbook -i <inventory host file> cephadm-purge-cluster.yml -e fsid=<your fsid> -e infra_pkgs_purge=<infra packages to uninstall>
 
 
 - name: check local prerequisites are in place
@@ -55,7 +55,7 @@
 
 
 - name: check cluster hosts have cephadm and the required fsid {{ fsid }}
-  hosts: all
+  hosts: all,!{{ client_group }}
   gather_facts: false
   become: true
   any_errors_fatal: true
@@ -70,30 +70,26 @@
       register: cephadm_exists
       changed_when: false
       failed_when: false
-      when: group_names != [client_group]
 
     - name: fail if cephadm is not available
       fail:
         msg: |
           The cephadm binary is missing on {{ inventory_hostname }}. To purge the cluster you must have cephadm installed
           on ALL ceph hosts. Install manually or use the preflight playbook.
       when:
-        - group_names != [client_group]
         - cephadm_exists.rc
 
     - name: check fsid directory given is valid across the cluster
       stat:
         path: /var/lib/ceph/{{ fsid }}
       register: fsid_exists
-      when: group_names != [client_group]
 
     - name: fail if the fsid directory is missing
       fail:
         msg: |
           The fsid directory '/var/lib/ceph/{{ fsid }}' can not be found on {{ inventory_hostname }}
           Is the fsid correct?
       when:
-        - group_names != [client_group]
         - not fsid_exists.stat.exists | bool
 
 
@@ -133,7 +129,7 @@
 
 
 - name: Purge ceph daemons from all hosts in the cluster
-  hosts: all
+  hosts: all,!{{ client_group }}
   become: true
   gather_facts: false
   any_errors_fatal: true
@@ -144,7 +140,7 @@
 
     - name: purge ceph daemons
       command: "cephadm rm-cluster --force --zap-osds --fsid {{ fsid }}"
-      when: group_names != [client_group]
+      changed_when: false
 
 
 - name: remove ceph packages
@@ -157,9 +153,19 @@
       import_role:
         name: ceph_defaults
 
-    - name: remove ceph packages
+    - name: remove ceph packages on ceph nodes
       package:
-        name: "{{ 'ceph-common' if group_names == [client_group] else ceph_pkgs | unique }}"
+        name: "{{ ceph_pkgs | union(infra_pkgs | intersect(infra_pkgs_purge | default([]))) }}"
         state: absent
       register: result
       until: result is succeeded
+      when: group_names != [client_group]
+
+    - name: remove ceph packages on client nodes
+      package:
+        name: ceph-common
+        state: absent
+      register: result
+      until: result is succeeded
+      when: group_names == [client_group]
+