worker: shuffle architecture list

Right now the workers are lopsided to draining the i386 queues much faster,
presumably because it occurs first in the config's "architectures" list and the
order in which it connects to the queues matters.

1 files changed, 4 insertions, 0 deletions

diff --git a/worker/worker b/worker/worker
index c910c84..1e3eeac 100755
--- a/worker/worker
+++ b/worker/worker
@@ -19,6 +19,7 @@ import json
 import urllib.request
 import re
 import hashlib
+import random
 
 import amqplib.client_0_8 as amqp
 import swiftclient
@@ -487,6 +488,9 @@ def amqp_connect(cfg, callback):
         logging.info('No architectures in configuration, defaulting to %s', my_arch)
         arches = [my_arch]
 
+    # avoid preferring the same architecture on all workers
+    random.shuffle(arches)
+
     for release in cfg.get('autopkgtest', 'releases').split():
         for context in ['', 'ppa-', 'upstream-']:
             for arch in arches: