add string returns for metrics and properties

tasks/purge.yaml

@@ -0,0 +1,34 @@
+- name: Cosmostat - Clean up old ws_node image tags
+  block:
+    # Grab a list of all tags the image has
+    - name: Get all ws_node image tags
+      command: |
+        docker images --format "{{.Repository}}:{{.Tag}}" \
+                      --filter=reference="ws_node:*"
+      register: all_tags_raw
+      changed_when: false
+
+    # Turn that raw string into a list of just the tag names
+    - name: Parse tag names out of the list
+      set_fact:
+        all_tags: >-
+          {{ all_tags_raw.stdout_lines |
+             map('regex_replace', '^ws_node:', '') |
+             list }}
+
+    # Keep everything *except* the one that ends with “:latest”
+    - name: Build list of tags that should be removed
+      set_fact:
+        tags_to_remove: "{{ all_tags | difference(['latest']) }}"
+
+    # Remove each old tag
+    - name: Delete old ws_node image tags
+      community.docker.docker_image:
+        name: ws_node
+        tag: "{{ item }}"
+        state: absent
+      loop: "{{ tags_to_remove }}"
+      when: tags_to_remove | length > 0
+  when: tags_to_remove | length > 0
+  tags:
+    - cleanup