How to connect to GKE postgresql svc in GCP? - google-cloud-platform

Question

I'm trying to connect to the postgresql service (pod) in my kubernetes deployment but I GCP does not give a port (so I can not use something like: $ psql -h localhost -U postgresadmin1 --password -p 31070 postgresdb to connect to Postgresql and see my database).
I'm using a LoadBalancer in my service:
#cloudshell:~ (academic-veld-230622)$ psql -h 35.239.52.68 -U jhipsterpress --password -p 30728 jhipsterpress-postgresql
Password for user jhipsterpress:
psql: could not connect to server: Connection timed out
Is the server running on host "35.239.52.68" and accepting
TCP/IP connections on port 30728?
apiVersion: v1
kind: Service
metadata:
name: jhipsterpress
namespace: default
labels:
app: jhipsterpress
spec:
selector:
app: jhipsterpress
type: LoadBalancer
ports:
- name: http
port: 8080
NAME READY STATUS RESTARTS AGE
pod/jhipsterpress-84886f5cdf-mpwgb 1/1 Running 0 31m
pod/jhipsterpress-postgresql-5956df9557-fg8cn 1/1 Running 0 31m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/jhipsterpress LoadBalancer 10.11.243.22 35.184.135.134 8080:32670/TCP 31m
service/jhipsterpress-postgresql LoadBalancer 10.11.255.64 35.239.52.68 5432:30728/TCP 31m
service/kubernetes ClusterIP 10.11.240.1 <none> 443/TCP 35m
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
deployment.apps/jhipsterpress 1 1 1 1 31m
deployment.apps/jhipsterpress-postgresql 1 1 1 1 31m
NAME DESIRED CURRENT READY AGE
replicaset.apps/jhipsterpress-84886f5cdf 1 1 1 31m
replicaset.apps/jhipsterpress-postgresql-5956df9557 1 1 1 31m
#cloudshell:~ (academic-veld-230622)$ kubectl describe pod jhipsterpress-postgresql
Name: jhipsterpress-postgresql-5956df9557-fg8cn
Namespace: default
Priority: 0
PriorityClassName: <none>
Node: gke-standard-cluster-1-default-pool-bf9f446d-9hsq/10.128.0.58
Start Time: Sat, 06 Apr 2019 13:39:08 +0200
Labels: app=jhipsterpress-postgresql
pod-template-hash=1512895113
Annotations: kubernetes.io/limit-ranger=LimitRanger plugin set: cpu request for container postgres
Status: Running
IP: 10.8.0.14
Controlled By: ReplicaSet/jhipsterpress-postgresql-5956df9557
Containers:
postgres:
Container ID: docker://55475d369c63da4d9bdc208e9d43c457f74845846fb4914c88c286ff96d0e45a
Image: postgres:10.4
Image ID: docker-pullable://postgres#sha256:9625c2fb34986a49cbf2f5aa225d8eb07346f89f7312f7c0ea19d82c3829fdaa
Port: 5432/TCP
Host Port: 0/TCP
State: Running
Started: Sat, 06 Apr 2019 13:39:29 +0200
Ready: True
Restart Count: 0
Requests:
cpu: 100m
Environment:
POSTGRES_USER: jhipsterpress
POSTGRES_PASSWORD: <set to the key 'postgres-password' in secret 'jhipsterpress-postgresql'> Optional: false
Mounts:
/var/lib/pgsql/data from data (rw)
/var/run/secrets/kubernetes.io/serviceaccount from default-token-mlmm5 (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
data:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: spingular-bucket
ReadOnly: false
default-token-mlmm5:
Type: Secret (a volume populated by a Secret)
SecretName: default-token-mlmm5
Optional: false
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute for 300s
node.kubernetes.io/unreachable:NoExecute for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Warning FailedScheduling 33m (x3 over 33m) default-scheduler persistentvolumeclaim "spingular-bucket" not found
Warning FailedScheduling 33m (x3 over 33m) default-scheduler pod has unbound immediate PersistentVolumeClaims
Normal Scheduled 33m default-scheduler Successfully assigned default/jhipsterpress-postgresql-5956df9557-fg8cn to gke-standard-cluster-1-default-pool-bf9f446d-9hsq
Normal SuccessfulAttachVolume 33m attachdetach-controller AttachVolume.Attach succeeded for volume "pvc-95ba1737-5860-11e9-ae59-42010a8000a8"
Normal Pulling 33m kubelet, gke-standard-cluster-1-default-pool-bf9f446d-9hsq pulling image "postgres:10.4"
Normal Pulled 32m kubelet, gke-standard-cluster-1-default-pool-bf9f446d-9hsq Successfully pulled image "postgres:10.4"
Normal Created 32m kubelet, gke-standard-cluster-1-default-pool-bf9f446d-9hsq Created container
Normal Started 32m kubelet, gke-standard-cluster-1-default-pool-bf9f446d-9hsq Started container
With the open firewall: posgresql-jhipster
Ingress
Apply to all
IP ranges: 0.0.0.0/0
tcp:30728
Allow
999
default
Thanks for your help. Any documentation is really appreciated.

Answer 1

Your service is currently a type clusterIP. This does not expose the service or the pods outside the cluster. You can't connect to the pod from the Cloud Shell like this since the Cloud shell is not on your VPC and the pods are not exposed.
Update your service using kubectl edit svc jhipsterpress-postgresql
Change the spec.type field to 'LoadBalancer'
You will then have an external IP that you can connect to