Spawn virtual machines using nodepool images on ci.centos.org

We are going to be uploading nodepool images to the rdo-centos tenant
in RDO cloud. Since nodepool isn't going to be the one spawning the
virtual machines, we need to update our create-vm script so it knows
which image to use.

Change-Id: I85e3eed1436f7de3bae2d01a0b4adf23f1a0973c
Depends-On: I1236e01fe54309d5b59f28be21abe9da1c8695fa

jenkins/jobs/scripts/create-vm.sh

@@ -12,7 +12,7 @@ LOGSERVER="logs.rdoproject.org ansible_user=uploader"
 CLOUD=${CLOUD:-rdo-cloud}
 NETWORK=${NETWORK:-private}
 NAME="${JOB_NAME_SIMPLIFIED}-${BUILD_NUMBER}"
-IMAGE=${IMAGE:-template-centos7-weirdo-cr}
+IMAGE=${IMAGE:-template-rdo-centos-7}
 TIMEOUT=${TIMEOUT:-120}
 FLAVOR=${FLAVOR:-rdo.m1.nodepool}
 VM_INFO="${WORKSPACE}/vminfo.json"
@@ -29,6 +29,10 @@ pushd $WORKSPACE
 source provision_venv/bin/activate
 pip install ansible==2.3.1.0 ara shade
 
+# Is there a better way ?
+git clone https://github.com/rdo-infra/ci-config
+nodepool_image=$(python ci-config/jenkins/jobs/scripts/get-nodepool-image.py "${CLOUD}" --pattern "${IMAGE}")
+
 ara_location=$(python -c "import os,ara; print(os.path.dirname(ara.__file__))")
 export ANSIBLE_HOST_KEY_CHECKING=False
 export ANSIBLE_CALLBACK_PLUGINS="${ara_location}/plugins/callbacks"
@@ -100,7 +104,7 @@ cat <<EOF >create-vm.yml
             state: "present"
             cloud: "${CLOUD}"
             name: "${NAME}"
-            image: "${IMAGE}"
+            image: "${nodepool_image}"
             flavor: "${FLAVOR}"
             network: "${NETWORK}"
             reuse_ips: "no"
@@ -124,7 +128,7 @@ cat <<EOF >create-vm.yml
             state: "present"
             cloud: "${CLOUD}"
             name: "${NAME}"
-            image: "${IMAGE}"
+            image: "${nodepool_image}"
             flavor: "${FLAVOR}"
             network: "${NETWORK}"
             reuse_ips: "no"

jenkins/jobs/scripts/get-nodepool-image.py

@@ -0,0 +1,61 @@
+#!/usr/bin/env python
+#   Copyright Red Hat, Inc. All Rights Reserved.
+#
+#   Licensed under the Apache License, Version 2.0 (the "License"); you may
+#   not use this file except in compliance with the License. You may obtain
+#   a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#   WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#   License for the specific language governing permissions and limitations
+#   under the License.
+#
+
+# Returns the latest nodepool image matching a pattern from a cloud
+
+import argparse
+import shade
+import sys
+
+
+def get_args():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('cloud', help='name of the cloud in clouds.yaml')
+    parser.add_argument('--pattern', help='image name pattern to look for',
+                        default='template-rdo-centos-7')
+    args = parser.parse_args()
+    return args
+
+
+def main():
+    args = get_args()
+    cloud = shade.openstack_cloud(cloud=args.cloud)
+
+    # List all images
+    images = cloud.list_images()
+
+    # From those images, only pick the ones that have been uploaded by nodepool
+    # and match our pattern
+    nodepool_images = [
+        image
+        for image in images
+        if 'nodepool_build_id' in image['properties'] and
+           args.pattern in image['name']
+    ]
+
+    if nodepool_images:
+        # If there are any matches, alphabetically sort them by name
+        # This allows us to easily get the latest image since nodepool suffixes
+        # a unix timestamp at the end after the pattern.
+        nodepool_images = sorted(nodepool_images, key=lambda k: k['name'])
+        print(nodepool_images[-1]['name'])
+        sys.exit(0)
+    else:
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()