Make upload-image-s3 hash timeout configurable

With larger images we might run into timeouts with the default 10min
timeout for the md5/sha256 async tasks.

Since we don't know how long the upload will take, we also need to
adjust the number of retries for the async_status task.

Change-Id: I3004766786935a4a7f32663e22ae2b103c01ace4

roles/upload-image-s3/README.rst

@@ -68,3 +68,8 @@ expects.
    :default: `{{ zuul.build }}-{{ build_diskimage_image_name }}.{{ upload_image_s3_extension }}`
 
    The object name to use when uploading.
+
+.. zuul:rolevar:: upload_image_s3_hash_timeout
+   :default: 600
+
+   The async timeout for md5/sha256 image hash tasks.

roles/upload-image-s3/defaults/main.yaml

@@ -3,3 +3,4 @@ upload_image_s3_delete_after: 0
 upload_image_s3_filename: '{{ build_diskimage_image_root }}/{{ build_diskimage_image_name }}.{{ upload_image_s3_extension }}'
 upload_image_s3_name: '{{ zuul.build }}-{{ build_diskimage_image_name }}.{{ upload_image_s3_extension }}'
 upload_image_s3_extension: '{{ upload_image_s3_format }}'
+upload_image_s3_hash_timeout: 600

roles/upload-image-s3/tasks/main.yaml

@@ -3,7 +3,7 @@
   stat:
     path: '{{ upload_image_s3_filename }}'
     checksum_algorithm: sha256
-  async: 600
+  async: '{{ upload_image_s3_hash_timeout }}'
   poll: 0
   register: sha256_task
 
@@ -11,7 +11,7 @@
   stat:
     path: '{{ upload_image_s3_filename }}'
     checksum_algorithm: md5
-  async: 600
+  async: '{{ upload_image_s3_hash_timeout }}'
   poll: 0
   register: md5_task
 
@@ -58,7 +58,7 @@
     jid: "{{ sha256_task.ansible_job_id }}"
   register: sha256
   until: sha256.finished
-  retries: 1
+  retries: "{{ (upload_image_s3_hash_timeout > 10) | ternary(upload_image_s3_hash_timeout // 10, 10) }}"
   delay: 10
 
 - name: Wait for md5
@@ -66,7 +66,7 @@
     jid: "{{ md5_task.ansible_job_id }}"
   register: md5
   until: md5.finished
-  retries: 1
+  retries: "{{ (upload_image_s3_hash_timeout > 10) | ternary(upload_image_s3_hash_timeout // 10, 10) }}"
   delay: 10
 
 - name: Return artifact to Zuul