I have a simple python container that tries to connect to my operator-provisioned couchbase cluster (Enterprise Edition 5.5.0 build 2958 ‧ IPv4) via the service name. It fails to connect with the following:
kubectl run cbtest -it --image=ssdowd/cbtest:latest --restart=Never --rm=true --command /app/cbtest.py -- -n 1 -c couchbase://couchbase-550-e.default.svc.cluster.local -b mybucket -u myuser -p mypassword
If you don't see a command prompt, try pressing enter.
Namespace(bucket='mybucket', connection='couchbase://couchbase-550-e.default.svc.cluster.local', count=1, password='mypassword', user='myuser')
Traceback (most recent call last):
File "/app/cbtest.py", line 56, in <module>
bucket = cluster.open_bucket(args.bucket)
File "/usr/local/lib/python2.7/site-packages/couchbase/cluster.py", line 144, in open_bucket
rv = self.bucket_class(str(connstr), **kwargs)
File "/usr/local/lib/python2.7/site-packages/couchbase/bucket.py", line 273, in __init__
self._do_ctor_connect()
File "/usr/local/lib/python2.7/site-packages/couchbase/bucket.py", line 282, in _do_ctor_connect
self._connect()
couchbase.exceptions.LCB_0x2D (generated, catch: CouchbaseNetworkError, CouchbaseTransientError): <RC=0x2D[The remote host closed the connection], There was a problem while trying to send/receive your request over the network. This may be a result of a bad network or a misconfigured client or server, C Source=(src/bucket.c,1066)>
pod "cbtest" deleted
pod default/cbtest terminated (Error)
If I try to connect using the internal IP of one of the 3 CB nodes, it works correctly.
Connection code is:
from couchbase.cluster import Cluster
from couchbase.cluster import PasswordAuthenticator
from couchbase.bucket import Bucket
[...]
cluster = Cluster(args.connection)
if args.password:
authenticator = PasswordAuthenticator(args.user, args.password)
cluster.authenticate(authenticator)
bucket = cluster.open_bucket(args.bucket)