Fixes identified in ecp facilities hackathon fixes:

- improve mirror git repo management
- minio s3 implementation needs endpoint_url
- Remove image key from rebuild-index job
- Remove image, rely on tags instead

lib/spack/spack/cmd/release_jobs.py

@@ -646,9 +646,8 @@ def release_jobs(parser, args):
         'variables': {
             'MIRROR_URL': mirror_urls[0],
         },
-        'image': 'scottwittenburg/spack_ci_generator_alpine',
         'script': './bin/rebuild-index.sh',
-        'tags': ['spack-k8s']    # may want a runner to handle this
+        'tags': ['spack-post-ci']    # may want a runner to handle this
     }
     output_object['rebuild-index'] = final_job
     stage_names.append(final_stage)

lib/spack/spack/cmd/upload_s3.py

@@ -67,7 +67,7 @@ def get_s3_session(endpoint_url):
         raise SpackError('boto3 module not available')
 
     session = boto3.Session()
-    s3 = session.resource('s3')
+    s3 = session.resource('s3', endpoint_url=endpoint_url)
 
     bucket_names = []
     for bucket in s3.buckets.all():