Certificates as Kubernetes Secrets in Rancher

Sometimes you need to store an SSL certificate as a Kubernetes secret. This document walks through an example of how to secure a third-party S3-compatible objectstore for use with Portworx.

Create the secret

1. Copy your certificate to the location where the kubectl is configured for this Kubernetes cluster. Copy the public.crt file to the /opt/certs folder.

2. Create the secret:

   kubectl -n kube-system create secret generic px-s3-certs --from-file=/opt/certs/

3. Confirm that the secret was created correctly:

   kubectl -n kube-system describe secret px-s3-certs

Provide the secret to Portworx

Based on your Portworx installation type, provide the secret to Portworx by performing the steps in one of the following sections.

Portworx Operator

Update the Portworx StorageCluster to mount the secret and the environment variable:

  kubectl -n kube-system edit storagecluster portworx

  spec:
    volumes:
    - name: objectstore-cert
      mountPath: /etc/pwx/objectstore-cert
      secret:
        secretName: px-s3-certs
        items:
        - key: public.crt
          path: public.crt
    env:
    - name: "AWS_CA_BUNDLE"
      value: "/etc/pwx/objectstore-cert/public.crt"

After saving the modified StorageCluster, Portworx will restart in a rolling update.