It seems that when watching CRD custom objects we keep receiving the same event.
here is how to reproduce, kubectl create -f the following CRD.
kind: CustomResourceDefinition
metadata:
name: foobars.yoyo.com
spec:
group: yoyo.com
names:
kind: foobar
listKind: foobarList
plural: foobars
singular: foobar
scope: Namespaced
version: v1beta1
Then run this watch script:
from kubernetes import client, config, watch
GROUP = "yoyo.com"
VERSION = "v1beta1"
PLURAL = "foobars"
config.load_kube_config()
crds = client.CustomObjectsApi()
resource_version = ""
while True:
print "initializing stream"
stream = watch.Watch().stream(crds.list_cluster_custom_object,
GROUP, VERSION, PLURAL,
resource_version=resource_version)
for event in stream:
t = event["type"]
obj = event["object"]
print t
print obj
# Configure where to resume streaming.
metadata = obj['metadata']
if metadata['resourceVersion'] is not None:
resource_version = metadata['resourceVersion']
print resource_version
and create a custom object like so:
apiVersion: yoyo.com/v1beta1
kind: foobar
metadata:
name: test
spec:
whatever: youwant
The script stdout will be:
$ python ./bibi.py
initializing stream
ADDED
{u'kind': u'foobar', u'spec': {}, u'apiVersion': u'yoyo.com/v1beta1', u'metadata': {u'name': u'test', u'clusterName': u'', u'namespace': u'default', u'resourceVersion': u'84148', u'creationTimestamp': u'2018-04-04T14:07:40Z', u'selfLink': u'/apis/yoyo.com/v1beta1/namespaces/default/foobars/test', u'uid': u'89a26340-3811-11e8-816b-0800272f923d'}}
84148
ADDED
{u'kind': u'foobar', u'spec': {}, u'apiVersion': u'yoyo.com/v1beta1', u'metadata': {u'name': u'test', u'clusterName': u'', u'namespace': u'default', u'resourceVersion': u'84148', u'creationTimestamp': u'2018-04-04T14:07:40Z', u'selfLink': u'/apis/yoyo.com/v1beta1/namespaces/default/foobars/test', u'uid': u'89a26340-3811-11e8-816b-0800272f923d'}}
84148
ADDED
The stream does not die so the resource version never gets reset. The for loop keeps getting the same event over and over.
I was expecting the event to be received only once.
It seems that when watching CRD custom objects we keep receiving the same event.
here is how to reproduce,
kubectl create -fthe following CRD.Then run this watch script:
and create a custom object like so:
The script stdout will be:
The stream does not die so the resource version never gets reset. The for loop keeps getting the same event over and over.
I was expecting the event to be received only once.