Update packages prestage logic for Debian

Changes have been made which accomplish prestaging of
the repo and container images on the Debian subcloud. The existing
prestage logic has been modified so that the kickstart can find the
prestaged software packages for debian.

In this commit:
  - software packages are now prestaged under /opt/platform-backup/ostree_repo.
  - registry user images prestage location remains unchanged (versioned).
  - remove code related to prestage_packages_completed flag as
    it is no longer relevant. The ostree repo prestage can be re-run.

Test Plan:
PASS: Verify that the ostree_repo is prestaged at
      /opt/platform-backup.

PASS: Verify that the container images are prestaged at
      /opt/platform-backup/<release id>.

PASS: Verify that remote install uses prestaged ostree_repo if exists.

PASS: Verify that reinstall uses prestaged ostree_repo if it exists.

Story: 2010120
Task: 46840

Signed-off-by: Shrikumar Sharma <shrikumar.sharma@windriver.com>
Change-Id: Ia4aeb577b71b407ffd71bc41b8cd14b7fa0301e9

playbookconfig/src/playbooks/roles/prestage/prepare-env/tasks/cleanup_prestage_dir.yml

@@ -13,13 +13,6 @@
   set_fact:
     images_cleanup_dir: "{{ platform_backup_dir}}/{{ input_dir }}"
 
-- name: Delete packages prestage completed flag
-  file:
-    path: "{{ platform_backup_dir}}/{{ input_dir }}/{{ packages_prestage_completed_flag }}"
-    state: absent
-  become: yes
-  when: prestage_type == "packages"
-
 - block:
   - name: Check if {{ images_cleanup_dir }} exists
     stat:

playbookconfig/src/playbooks/roles/prestage/prepare-env/tasks/main.yml

@@ -22,7 +22,7 @@
 - name: Set prestage dir and subdirectory facts
   set_fact:
     prestage_reason: upgrade
-    prestage_dir: "{{ platform_backup_dir }}/{{ prestage_software_version }}"
+    prestage_dir: "{{ platform_backup_dir }}"
     packages_prestage_completed_flag: ".packages_prestage_completed"
 
 - name: Retrieve current software version of the host
@@ -46,21 +46,6 @@
     prestage_reason: reinstall
   when: prestage_software_version == host_software_version
 
-- block:
-  - name: Look for packages_prestage_completed flag
-    stat:
-      path: "{{ prestage_dir }}/{{ packages_prestage_completed_flag }}"
-    register: flag_file_check
-
-  - block:
-    - name: Skip packages prestaging if it was completed already
-      debug:
-        msg: "Packages prestaging for {{ prestage_software_version }} is already completed."
-    - meta: end_play
-    when: flag_file_check.stat.exists
-
-  when: prestage_type == "packages"
-
 - block:
   - block:
     - name: Skip images prestaging for upgrade if images list is not specified

playbookconfig/src/playbooks/roles/prestage/prestage-images/tasks/main.yml

@@ -85,7 +85,7 @@
     no_log: true
 
   - name: Generate image bundles
-    script: gen-image-bundles.sh "{{ prestage_dir }}" "{{ images_output_file }}" "{{ bundle_size }}"
+    script: gen-image-bundles.sh "{{ prestage_dir }}/{{ software_version }}" "{{ images_output_file }}" "{{ bundle_size }}"
     register: gen_image_bundles_output
 
   - debug: var=gen_image_bundles_output.stdout_lines

playbookconfig/src/playbooks/roles/prestage/prestage-sw-packages/tasks/main.yml

@@ -11,7 +11,7 @@
 
 - name: Set local prestaging repo path on the subcloud
   set_fact:
-    local_prestaging_repo: "{{ prestage_dir }}/prestaging_repo"
+    local_prestaging_repo: "{{ prestage_dir }}/ostree_repo"
 
 - name: Ensure local prestaging repo path exist
   file:
@@ -59,10 +59,3 @@
       recurse: yes
 
   when: prestage_reason == 'upgrade'
-
-- name: Mark software prestaging as completed
-  file:
-    path: "{{ prestage_dir }}/{{ packages_prestage_completed_flag }}"
-    state: touch
-    owner: root
-    mode: 0644