feature: allow conditional parellel builds

Author: mufaddal-rohawala

ci-scripts/queue_build.py

@@ -21,98 +21,127 @@
 ).get_caller_identity()["Account"]
 bucket_name = "sagemaker-us-west-2-%s" % account
 
+MAX_IN_PROGRESS_BUILDS = 3
+INTERVAL_BETWEEN_CONCURRENT_RUNS = 15  # minutes
+CLEAN_UP_TICKETS_OLDER_THAN = 8  # hours
+
 
 def queue_build():
-    build_id = os.environ.get("CODEBUILD_BUILD_ID", "CODEBUILD-BUILD-ID")
-    source_version = os.environ.get("CODEBUILD_SOURCE_VERSION", "CODEBUILD-SOURCE-VERSION").replace(
-        "/", "-"
-    )
     ticket_number = int(1000 * time.time())
-    filename = "%s_%s_%s" % (ticket_number, build_id, source_version)
-
-    print("Created queue ticket %s" % ticket_number)
-
-    _write_ticket(filename)
     files = _list_tickets()
-    _cleanup_tickets_older_than_8_hours(files)
-    _wait_for_other_builds(files, ticket_number)
+    _cleanup_tickets_older_than(files)
+    _wait_for_other_builds(ticket_number)
 
 
 def _build_info_from_file(file):
-    filename = file.key.split("/")[1]
+    filename = file.key.split("/")[2]
     ticket_number, build_id, source_version = filename.split("_")
     return int(ticket_number), build_id, source_version
 
 
-def _wait_for_other_builds(files, ticket_number):
-    newfiles = list(filter(lambda file: not _file_older_than(file), files))
-    sorted_files = list(sorted(newfiles, key=lambda y: y.key))
+def _wait_for_other_builds(ticket_number):
+    sorted_files = _list_tickets()
 
     print("build queue status:")
     print()
 
     for order, file in enumerate(sorted_files):
         file_ticket_number, build_id, source_version = _build_info_from_file(file)
         print(
-            "%s -> %s %s, ticket number: %s" % (order, build_id, source_version, file_ticket_number)
+            "%s -> %s %s, ticket number: %s status: %s"
+            % (order, build_id, source_version, file_ticket_number, file.key.split("/")[1])
         )
+    print()
+    build_id = os.environ.get("CODEBUILD_BUILD_ID", "CODEBUILD-BUILD-ID")
+    source_version = os.environ.get("CODEBUILD_SOURCE_VERSION", "CODEBUILD-SOURCE-VERSION").replace(
+        "/", "-"
+    )
+    filename = "%s_%s_%s" % (ticket_number, build_id, source_version)
+    s3_file_obj = _write_ticket(filename, status="waiting")
+    print("Build %s waiting to be scheduled" % filename)
+
+    while True:
+        _cleanup_tickets_with_terminal_states()
+        waiting_tickets = _list_tickets("waiting")
+        if waiting_tickets:
+            first_waiting_ticket_number, _, _ = _build_info_from_file(_list_tickets("waiting")[0])
+        else:
+            first_waiting_ticket_number = ticket_number
+
+        if (
+            len(_list_tickets(status="in-progress")) < 3
+            and last_in_progress_elapsed_time_check()
+            and first_waiting_ticket_number == ticket_number
+        ):
+            # put the build in progress
+            print("Scheduling build %s for running.." % filename)
+            s3_file_obj.delete()
+            _write_ticket(filename, status="in-progress")
+            break
+        else:
+            # wait
+            time.sleep(30)
 
-    for file in sorted_files:
-        file_ticket_number, build_id, source_version = _build_info_from_file(file)
 
-        if file_ticket_number == ticket_number:
+def last_in_progress_elapsed_time_check():
+    in_progress_tickets = _list_tickets("in-progress")
+    if not in_progress_tickets:
+        return True
+    last_in_progress_ticket, _, _ = _build_info_from_file(_list_tickets("in-progress")[-1])
+    _elapsed_time = int(1000 * time.time()) - last_in_progress_ticket
+    last_in_progress_elapsed_time = int(_elapsed_time / (1000 * 60))  # in minutes
+    return last_in_progress_elapsed_time > INTERVAL_BETWEEN_CONCURRENT_RUNS
 
-            break
-        else:
-            while True:
-                client = boto3.client("codebuild")
-                response = client.batch_get_builds(ids=[build_id])
-                build_status = response["builds"][0]["buildStatus"]
-
-                if build_status == "IN_PROGRESS":
-                    print(
-                        "waiting on build %s %s %s" % (build_id, source_version, file_ticket_number)
-                    )
-                    time.sleep(30)
-                else:
-                    print("build %s finished, deleting lock" % build_id)
-                    file.delete()
-                    break
-
-
-def _cleanup_tickets_older_than_8_hours(files):
+
+def _cleanup_tickets_with_terminal_states():
+    files = _list_tickets()
+    for file in files:
+        _, build_id, _ = _build_info_from_file(file)
+        client = boto3.client("codebuild")
+        response = client.batch_get_builds(ids=[build_id])
+        build_status = response["builds"][0]["buildStatus"]
+
+        if build_status != "IN_PROGRESS":
+            print("Build %s in terminal state: %s, deleting lock" % (build_id, build_status))
+            file.delete()
+
+
+def _cleanup_tickets_older_than(files):
     oldfiles = list(filter(_file_older_than, files))
     for file in oldfiles:
         print("object %s older than 8 hours. Deleting" % file.key)
         file.delete()
     return files
 
 
-def _list_tickets():
+def _list_tickets(status=None):
     s3 = boto3.resource("s3")
     bucket = s3.Bucket(bucket_name)
-    objects = [file for file in bucket.objects.filter(Prefix="ci-lock/")]
-    files = list(filter(lambda x: x != "ci-lock/", objects))
-    return files
+    prefix = "ci-integ-queue/{}/".format(status) if status else "ci-integ-queue/"
+    objects = [file for file in bucket.objects.filter(Prefix=prefix)]
+    files = list(filter(lambda x: x != prefix, objects))
+    sorted_files = list(sorted(files, key=lambda y: y.key))
+    return sorted_files
 
 
 def _file_older_than(file):
-    timelimit = 1000 * 60 * 60 * 8
-
+    timelimit = 1000 * 60 * 60 * CLEAN_UP_TICKETS_OLDER_THAN
     file_ticket_number, build_id, source_version = _build_info_from_file(file)
+    return int(1000 * time.time()) - file_ticket_number > timelimit
 
-    return int(time.time()) - file_ticket_number > timelimit
-
-
-def _write_ticket(ticket_number):
 
-    if not os.path.exists("ci-lock"):
-        os.mkdir("ci-lock")
+def _write_ticket(filename, status="waiting"):
+    file_path = "ci-integ-queue/{}".format(status)
+    if not os.path.exists(file_path):
+        os.makedirs(file_path)
 
-    filename = "ci-lock/" + ticket_number
-    with open(filename, "w") as file:
-        file.write(ticket_number)
-    boto3.Session().resource("s3").Object(bucket_name, filename).upload_file(filename)
+    file_full_path = file_path + "/" + filename
+    with open(file_full_path, "w") as file:
+        file.write(filename)
+    s3_file_obj = boto3.Session().resource("s3").Object(bucket_name, file_full_path)
+    s3_file_obj.upload_file(file_full_path)
+    print("Build %s is now in state %s" % (filename, status))
+    return s3_file_obj
 
 
 if __name__ == "__main__":