03 Kubernetes Secret for storing Oracle ATP wallet

Kubernetes Secret are used to store secrets during the setup of the cluster and then we can mount the same inside the docker containers. In this example, I am using it to store the Oracle ATP wallet which is used to talk to the ATP instance

kubectl create secret generic db-user-pass 
        --from-file=./cwallet.sso 
        --from-file=./ewallet.p12 
        --from-file=./keystore.jks 
        --from-file=./ojdbc.properties 
        --from-file=./sqlnet.ora 
        --from-file=./tnsnames.ora 
        --from-file=./truststore.jks

This is using the command line, apart from that even we can have a Secret Kind file similar to Deployment Kind and set it up using the 'kubectl apply'.

After this, we need to mount the secret as a volume and use it inside the container

apiVersion: v1
kind: Deployment
metadata:
  name: addition-svc-deployment
  labels:
    name: addition-svc
spec:
  volumes:
  - name: secret-volume
    secret:
      secretName: db-user-pass
  containers:
  - name: addition-svc-container
    image: addition-svc:latest
    volumeMounts:
    - name: secret-volume
      readOnly: true
      mountPath: "/etc/secret/atp-wallet"

Other links:
http://venkateshbook.blogspot.com/2019/05/kubernetes-commands.html
http://venkateshbook.blogspot.com/2019/05/kubernetes-yaml-definitions.html
http://venkateshbook.blogspot.com/2019/05/02-kubernetes-service-definition.html