validate-zone-db : add job and make more generic

There was a request in If3dc95d1348553e5b43683f6a36d324fb978fbed to
make the role more generic so it could handle different layouts of
zone.db files.  Make it so the role can take a list of tuples (domain,
path/to/zone.db) so that we can handle any layouts, and modify the
default searching to build this from the source directory.

Reviews in https://review.opendev.org/660888 suggested making this
defined as a generic job, so a validate-zone-db job is added.

Change-Id: I56cbc027f63787f90eef283eeb2fbb81486dcaf5

doc/source/general-jobs.rst

@@ -6,3 +6,4 @@ General Purpose Jobs
 .. zuul:autojob:: multinode
 .. zuul:autojob:: run-test-command
 .. zuul:autojob:: upload-git-mirror
+.. zuul:autojob:: validate-zone-db

playbooks/validate-zone-db/run.yaml

@@ -0,0 +1,4 @@
+- hosts: all
+  name: Run zone.db check
+  roles:
+    - validate-zone-db

roles/validate-zone-db/README.rst

@@ -9,4 +9,14 @@ This role uses ``named-checkzone`` to validate Bind ``zone.db`` files.
 
    Look for ``zone.db`` files recursively in this directory.  The
    layout should be ``domain.xyz/zone.db`` where a parent directory is
-   named for the zone the child ``zone.db`` file describes.
+   named for the zone the child ``zone.db`` file describes.  This
+   populates the ``zone_db_files`` variable.  Will not be used if
+   ``zone_db_files`` is explicitly set per below.
+
+.. zuul:rolevar:: zone_db_files
+   :default: []
+
+   A list of ``zone.db`` files to check.  Each entry is a list with
+   the first element the domain, and the second element the path to
+   the ``zone.db`` file.  If this variable is set, automatic searching
+   described by ``zone_files`` will not be performed.

roles/validate-zone-db/defaults/main.yaml

@@ -1,2 +1,3 @@
 zone_files: '{{ ansible_user_dir }}/{{ zuul.project.src_dir }}'
+zone_db_files: []
 

roles/validate-zone-db/tasks/find.yaml

@@ -0,0 +1,12 @@
+- name: Find zone files
+  find:
+    paths: '{{ zone_files }}'
+    patterns: 'zone.db'
+    recurse: yes
+    file_type: 'file'
+  register: zone_db_found_files
+
+- name: Build zone.db file list
+  set_fact:
+    zone_db_files: '{{ zone_db_files + [ [item.path.split("/")[-2], item.path] ] }}'
+  loop: "{{ zone_db_found_files['files'] }}"

roles/validate-zone-db/tasks/main.yaml

@@ -4,14 +4,10 @@
     state: present
   become: yes
 
-- name: Find zone files
-  find:
-    paths: '{{ zone_files }}'
-    patterns: 'zone.db'
-    recurse: yes
-    file_type: 'file'
-  register: zone_db_files
+- name: Build zone.db list
+  include_tasks: find.yaml
+  when: not zone_db_files
 
 - name: 'Run checkzone'
-  command: '/usr/sbin/named-checkzone {{ item.path.split("/")[-2] }} {{ item.path }}'
-  loop: "{{ zone_db_files['files'] }}"
+  command: '/usr/sbin/named-checkzone {{ item[0] }} {{ item[1] }}'
+  loop: "{{ zone_db_files }}"

zuul.yaml

@@ -574,3 +574,25 @@
     run: playbooks/run-test-command/run.yaml
     vars:
       test_command: "exit 1"
+
+- job:
+    name: validate-zone-db
+    parent: base
+    description: |
+      Validate zone.db files in project.
+
+      Responds to these variables:
+
+      .. zuul:jobvar:: zone_files
+         :default: {{ ansible_user_dir }}/{{ zuul.project.src_dir }}
+
+         Search for zone.db files recursively in this directory.
+         Format should be domain.xyz/zone.db, where the parent
+         directory is named for the zone described.
+
+      .. zuul:jobvar:: zone_db_list
+         :default: []
+
+         Override the default searching above with explicit
+         domain/path references (see validate-zone-db role)
+    run: playbooks/validate-zone-db/run.yaml