update opendistro migration tool to export to host directory

Author: sjpb

ansible/adhoc/migrate-opendistro.yml

@@ -2,32 +2,16 @@
 #
 # Usage:
 #
-#   ansible-playbook ansible/adhoc/migrate-opendistro.yml
 #   git pull                # and merge etc as required, including changing groups file to define opensearch not opendistro
-#   ansible-playbook ansible/adhoc/generate-passwords.yml
+#   ansible-playbook ansible/adhoc/migrate-opendistro.yml
 #   ansible-playbook ansible/monitoring.yml
 #
 
-- hosts: opendistro
+- hosts: opensearch
   become: no
   gather_facts: no
   tasks:
-    - name: Stop opendistro
-      ansible.builtin.systemd:
-        name: opendistro.service
-        state: stopped
-        enabled: false
-      become: yes
-    
-    - name: Make opensearch volume
-      containers.podman.podman_volume:
+    - name: Export opendistro volume
+      import_role:
         name: opensearch
-      become: yes
-      become_user: "{{ opendistro_podman_user }}"
-    
-    - name: Copy opendistro data
-      shell:
-        cmd: "podman volume export opendistro | podman volume import opensearch -"
-        creates: "{{ appliances_local_users_podman_home }}.local/share/containers/storage/volumes/opensearch"
-      become: yes
-      become_user: "{{ opendistro_podman_user }}"
+        tasks_from: migrate-opendistro.yml

ansible/roles/opensearch/tasks/migrate-opendistro.yml

@@ -0,0 +1,39 @@
+# This relies on:
+# - open{distro,search}_podman_user being the same
+# - opendistro and opensearch hosts being the same
+
+# NB: This deliberately does not remove the opendistro podman volume - do that manually once happy.
+
+- name: Stop opendistro
+  ansible.builtin.systemd:
+    name: opendistro.service
+    state: stopped
+    enabled: false
+  become: yes
+    
+- name: Export opendistro volume
+  ansible.builtin.shell:
+    cmd: podman volume export opendistro --output /tmp/opendistro_volume.tar
+    creates: /tmp/opendistro_volume.tar
+  become: yes
+  become_user: "{{ opensearch_podman_user }}"
+
+- name: Make opensearch data directory
+  file:
+    path: "{{ opensearch_data_path }}"
+    state: directory
+    owner: "{{ opensearch_podman_user }}"
+    group: "{{ opensearch_podman_user }}"
+  become: yes
+  become_user: "{{ opensearch_podman_user }}"
+
+- name: Unpack opendistro volume
+  ansible.builtin.unarchive:
+    remote_src: yes
+    src: /tmp/opendistro_volume.tar
+    dest: "{{ opensearch_data_path }}"
+    owner: "{{ opensearch_podman_user }}"
+    group: "{{ opensearch_podman_user }}"
+    list_files: yes
+  become: yes
+  become_user: "{{ opensearch_podman_user }}"