CORD-3224 Implement KubernetesResourceInstance
Change-Id: Ic3c7691aa16a20c0d7d69994fef1ad8ac6d1ca44
diff --git a/xos/synchronizer/steps/sync_kubernetesresourceinstance.py b/xos/synchronizer/steps/sync_kubernetesresourceinstance.py
new file mode 100644
index 0000000..60174bb
--- /dev/null
+++ b/xos/synchronizer/steps/sync_kubernetesresourceinstance.py
@@ -0,0 +1,80 @@
+
+# Copyright 2017-present Open Networking Foundation
+#
+# 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.
+
+"""
+ sync_kubernetesresourceinstance.py
+
+ Synchronize KubernetesResourceInstance.
+
+ This sync_step is instantiates generic resources by executing them with `kubectl`.
+"""
+
+import os
+import subprocess
+import tempfile
+from synchronizers.new_base.syncstep import SyncStep
+from synchronizers.new_base.modelaccessor import KubernetesResourceInstance
+
+from xosconfig import Config
+from multistructlog import create_logger
+
+log = create_logger(Config().get('logging'))
+
+class SyncKubernetesResourceInstance(SyncStep):
+
+ """
+ SyncKubernetesResourceInstance
+
+ Implements sync step for syncing kubernetes resource instances. These objects are basically a yaml blob that
+ is passed to `kubectl`.
+ """
+
+ provides = [KubernetesResourceInstance]
+ observes = KubernetesResourceInstance
+ requested_interval = 0
+
+ def __init__(self, *args, **kwargs):
+ super(SyncKubernetesResourceInstance, self).__init__(*args, **kwargs)
+
+ def run_kubectl(self, operation, recipe):
+ (tmpfile, fn)=tempfile.mkstemp()
+ os.write(tmpfile, recipe)
+ os.close(tmpfile)
+ try:
+ p = subprocess.Popen(args=["/usr/local/bin/kubectl", operation, "-f", fn],
+ stdin=None,
+ stderr=subprocess.PIPE,
+ stdout=subprocess.PIPE,
+ close_fds=True)
+ (stdout, stderr) = p.communicate()
+ log.info("kubectl completed", stderr=stderr, stdout=stdout, recipe=recipe)
+ if p.returncode!=0:
+ raise Exception("Process failed with returncode %s" % p.returncode)
+ finally:
+ os.remove(fn)
+
+ def sync_record(self, o):
+ self.run_kubectl("apply", o.resource_definition)
+ if (o.kubectl_state == "created"):
+ o.kubectl_state = "updated"
+ else:
+ o.kubectl_state = "created"
+ o.save(update_fields=["kubectl_state"])
+
+ def delete_record(self, o):
+ if o.kubectl_state in ["created", "updated"]:
+ self.run_kubectl("delete", o.resource_definition)
+ o.kubectl_state="deleted"
+ o.save(update_fields=["kubectl_state"])