Hi,
I have 3 services kubernetes cluster and suddenly, i am seeing dns
lookup failure in my code.
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: gremlinserver
name: gremlinserver-service
spec:
ports:
- port: 8182
protocol: TCP
targetPort: 8182
nodePort: 30085
name: ws-port
selector:
app: gremlinserver
type: NodePort
status:
loadBalancer: {}
-----------------------
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: graphdbmgr
name: graphdbmgr-service
spec:
ports:
- port: 8084
protocol: TCP
targetPort: 8084
nodePort: 30084
name: grpc-port
- port: 8083
protocol: TCP
targetPort: 8083
nodePort: 30083
name: rest-port
selector:
app: graphdbmgr
type: NodePort
status:
loadBalancer: {}
-------------------------
apiVersion: v1
kind: Service
metadata:
creationTimestamp: null
labels:
app: policyreader
name: policyreader-service
spec:
ports:
- port: 8082
protocol: TCP
targetPort: 8082
nodePort: 30082
name: grpc-port
- port: 8081
protocol: TCP
targetPort: 8081
nodePort: 30081
name: rest-port
selector:
app: policyreader
type: NodePort
status:
loadBalancer: {}
In graphdbmgr, i lookup for policyreader and gremlinserver service. Lookup for
policyreader service is going fine, however gremlin server lookup is failing
_, rec, err := net.LookupSRV(GREMLINSERVERPORTNAME, "tcp",
GREMLINSERVER+"-service.default.svc.cluster.local")
if err != nil {
orkuserr.PrintError(logger, "Failed to find gremlin service", err)
return nil
}
Its keeps complaining "Failed to unmarshal DNS message". However, when i do
nslookup from the graphdbmgr pod, i get the right entry
nslookup _ws-port._tcp.gremlinserver-service.default.svc.cluster.local
Server: 10.96.0.10
Address: 10.96.0.10#53
_ws-port._tcp.gremlinserver-service.default.svc.cluster.local canonical name
= gremlinserver-service.default.svc.cluster.local.
Name: gremlinserver-service.default.svc.cluster.local
Address: 10.96.27.79
Not sure, why the go code is bailing out. Anyway, i can dump the kube-dns
entries?
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