dockerkuberneteskubectl

How to add custom host entries to kubernetes Pods?

My application communicates to some services via hostnames. When running my application as a docker container i used to add hostnames to the /etc/hosts of the hostmachine and run the container using --net=host.

Now I'm running my containers in kubernetes cluster. I would like to know how can i add the /etc/hosts entries to the pod via yaml.

I'm using kubernetes v1.5.3.

Solution

  • This works and also looks simpler: 

    kind: Service
apiVersion: v1 
metadata:
    name: {HOST_NAME} 
    spec:
      ports:
        - protocol: TCP
          port: {PORT}
          targetPort: {PORT}
      type: ExternalName
      externalName: {EXTERNAL_IP}

    Now you can use the HOST_NAME from the pod directly to access the external machine.