Good afternoon, I have a question, I am new to Kubernetes and I need to connect to a DB that is outside of my cluster, I could only connect to the DB using the hostNetwork = true, however, this is not recommended, in this case there is a method to communicate with External DB?
I leave you the yaml that I am currently using, my pod contains one container that work with spring boot
apiVersion: apps/v1
kind: Deployment
metadata:
name: find-complementary-account-info
labels:
app: find-complementary-account-info
spec:
replicas: 2
selector:
matchLabels:
app: find-complementary-account-info
template:
metadata:
labels:
app: find-complementary-account-info
spec:
hostNetwork: true
dnsPolicy: Default
containers:
- name: find-complementary-account-info
image:find-complementary-account-info:latest
imagePullPolicy: IfNotPresent
resources:
limits:
memory: "350Mi"
requests:
memory: "300Mi"
ports:
- containerPort: 8081
env:
- name: URL_CONNECTION_BD
value: jdbc:oracle:thin:@11.160.9.18:1558/DEFAULTSRV.WORLD
- name: USERNAME_CONNECTION_BD
valueFrom:
secretKeyRef:
name: credentials-bd-pers
key: user_pers
- name: PASSWORD_CONNECTION_BD
valueFrom:
secretKeyRef:
name: credentials-bd-pers
key: password_pers
key: password_pers
---
apiVersion: v1
kind: Service
metadata:
name: find-complementary-account-info
spec:
type: NodePort
selector:
app: find-complementary-account-info
ports:
- protocol: TCP
port: 8081
targetPort: 8081
nodePort: 30020Anyone have an idea how to communicate with external DB? This is not a cloud cluster, it is OnPremise
hostNetwork parameter is used for accessing pods from outside of the Cluster, you don't need that.
Pods from inside the Cluster can communicate externally because they are NATted. If not, something external prevent it, like a firewall or a missing routing.
The quicker way to find that is to ssh to one of your Kubernetes cluster nodes and try
telnet 11.160.9.18 1558Anyway that IP address seems a Public one, so you have to check your company firewall imho