Overcloud database backup S3 upload

Added playbook uploading overcloud MariaDB backups to S3 compatible
storage. Can be linked as overcloud database backup post hook.

Author: darmach

etc/kayobe/ansible/upload-database-backup-s3.yml

@@ -0,0 +1,35 @@
+---
+    # This playbook uploads MariaDB backups to an AWS S3 object store.
+    # Can be linked as a post hook for overcloud-database-backup.
+
+    - hosts: controllers[0]
+      vars:
+        backup_directory: "/var/lib/docker/volumes/mariadb_backup/_data"
+        kayobe_venv: "/opt/kayobe/venvs/kayobe"
+      tasks:
+        - name: Ensure AWS S3 module prerequisities are available
+          pip:
+            name:
+              - boto3
+              - botocore
+            virtualenv: "{{ kayobe_venv }}"
+
+        - name: Build backup file list
+          find:
+            paths: "{{ backup_directory }}"
+          become: True
+          register: backups
+
+        - name: Upload backup files to S3
+          amazon.aws.aws_s3:
+            s3_url: "{{ s3_url }}"
+            access_key: "{{ secrets_s3_access_key }}"
+            secret_key: "{{ secrets_s3_secret_key }}"
+            bucket: "{{ s3_mariadb_mysql_backup_bucket }}"
+            object: "{{ item.path | basename }}"
+            src: "{{ item.path }}"
+            mode: put
+            overwrite: different
+            validate_certs: False
+          become: True
+          with_items: "{{ backups.files }}"