Configure Portworx Backup for S3 object store with TLS

This topic explains how to configure Portworx Backup with a secure S3 compatible object store having a self-signed certificate with TLS enabled.

You need to configure the following components to add the secure S3 object store certificate. This configuration enables the components to perform the following tasks by accessing the S3 object store:

• Stork: to back up Kubernetes resources
• Portworx Backup: to create backup locations in the UI
• Portworx nodes: to back up Portworx volumes

note

Configure Stork and install Portworx on all the clusters added in the Portworx Backup UI.

The following sections explain how you can add the secure S3 object store certificate to each component:

Stork

You need to modify the Stork deployment file to add a secret mount with the custom certificate, and then add an environment variable pointing to the secret mount.

• Create a secret in the namespace where Stork is deployed with the S3 object store certificate, assuming the file public.crt contains the certificate:

  kubectl -n <stork-deployed-namespace> create secret generic px-s3-certs --from-file=public.crt

After performing the above task, you can deploy Stork using any one of the two methods specified below:

1. Portworx operator method with storage cluster - stc:

• Update the stork section of stc spec with the following configuration settings:

     spec:
       stork:
        enabled: true
        env:
        - name: AWS_CA_BUNDLE
          value: /etc/pwx/s3cert/public.crt
        - name: SSL_CERT_DIR
          value: /etc/pwx/s3cert
        volumes:
        - mountPath: /etc/pwx/s3cert
          name: px-s3-certs
          secret:
            items:
            - key: public.crt
              path: public.crt
            secretName: px-s3-certs

2. Directly applying stork.spec by modifying the Stork deployment:

To modify the Stork deployment, perform the below steps.

• Edit the Stork deployment:

  kubectl edit deployment stork -n <stork-deployed-namespace>

• Add AWS_CA_BUNDLE and SSL_CERT_DIR environment variables:

  env:
  - name: PX_SERVICE_NAME
    value: portworx-api
  - name: AWS_CA_BUNDLE
    value: /etc/pwx/s3cert/public.crt
  - name: SSL_CERT_DIR
    value: /etc/pwx/s3cert

• Add volume mounts:

  volumeMounts:
  - mountPath: /etc/pwx/s3cert
    name: px-s3-certs

• Add a volume:

  volumes:
  - name: px-s3-certs
    secret:
      defaultMode: 420
      secretName: px-s3-certs

• Save the changes and wait for the Stork pods to restart.

Portworx Backup

To configure the Portworx Backup deployment specification:

1. Create a secret in the central namespace with the S3 object store certificate, assuming the file public.crt contains the certificate:

   kubectl create ns central
   kubectl -n central create secret generic px-s3-certs --from-file=public.crt

2. Set the following parameter with the install or upgrade command with helm:

   --set caCertsSecretName=px-s3-certs

   Above command adds the parameter SSL_CERT_DIR to the backup deployment.

   If you have added this parameter manually, delete the cronjob and then restart the Portworx Backup pod by executing the following commands:

   kubectl -n <px-backup-namespace> get cronjob | grep ^full-main | awk '{print $1}' | xargs kubectl -n <px-backup-namespace> delete cronjob
   kubectl -n <px-backup-namespace> get cronjob | grep ^quick-main | awk '{print $1}' | xargs kubectl -n <px-backup-namespace> delete cronjob
   kubectl delete pods -n <px-backup-namespace> <px-backup-pod-name>

   Example:

   kubectl -n px-backup get cronjob | grep ^full-main | awk '{print $1}' | xargs kubectl -n px-backup delete cronjob
   kubectl -n px-backup get cronjob | grep ^quick-main | awk '{print $1}' | xargs kubectl -n px-backup delete cronjob
   kubectl delete pods -n px-backup px-backup-f56cdcbd9-rvb65

For more information on installation and upgrade of Portworx Backup, refer to Install Portworx Backup and Upgrade Portworx Backup sections respectively.

Alternatively, you can configure Portworx Backup by creating a secret on the same namespace where you deploy Portworx Backup, and set the caCertsSecretName parameter:

1. Configure custom CA certificate:

   • Create a secret with CA certificates into the release namespace. For example:

     apiVersion: v1
     stringData:
     ca.crt: |
     -----BEGIN CERTIFICATE-----
     MIIEczCCA1ugAwIBAgIBADANBgkqhkiG9w0BAQQFAD..AkGA1UEBhMCR0Ix
     EzARBgNVBAgTClNvbWUtU3RhdGUxFDASBgNVBAoTC0..0EgTHRkMTcwNQYD
     VQQLEy5DbGFzcyAxIFB1YmxpYyBQcmltYXJ5IENlcn..XRpb24gQXV0aG9y
     aXR5MRQwEgYDVQQDEwtCZXN0IENBIEx0ZDAeFw0wMD..TUwMTZaFw0wMTAy
     MDQxOTUwMTZaMIGHMQswCQYDVQQGEwJHQjETMBEGA1..29tZS1TdGF0ZTEU
     MBIGA1UEChMLQmVzdCBDQSBMdGQxNzA1BgNVBAsTLk..DEgUHVibGljIFBy
     aW1hcnkgQ2VydGlmaWNhdGlvbiBBdXRob3JpdHkxFD..AMTC0Jlc3QgQ0Eg
     THRkMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCg..Tz2mr7SZiAMfQyu
     vBjM9OiJjRazXBZ1BjP5CE/Wm/Rr500PRK+Lh9x5eJ../ANBE0sTK0ZsDGM
     ak2m1g7oruI3dY3VHqIxFTz0Ta1d+NAjwnLe4nOb7/..k05ShhBrJGBKKxb
     8n104o/5p8HAsZPdzbFMIyNjJzBM2o5y5A13wiLitE..fyYkQzaxCw0Awzl
     kVHiIyCuaF4wj571pSzkv6sv+4IDMbT/XpCo8L6wTa..sh+etLD6FtTjYbb
     rvZ8RQM1tlKdoMHg2qxraAV++HNBYmNWs0duEdjUbJ..XI9TtnS4o1Ckj7P
     OfljiQIDAQABo4HnMIHkMB0GA1UdDgQWBBQ8urMCRL..5AkIp9NJHJw5TCB
     tAYDVR0jBIGsMIGpgBQ8urMCRLYYMHUKU5AkIp9NJH..aSBijCBhzELMAkG
     A1UEBhMCR0IxEzARBgNVBAgTClNvbWUtU3RhdGUxFD..AoTC0Jlc3QgQ0Eg
     THRkMTcwNQYDVQQLEy5DbGFzcyAxIFB1YmxpYyBQcm..ENlcnRpZmljYXRp
     b24gQXV0aG9yaXR5MRQwEgYDVQQDEwtCZXN0IENBIE..DAMBgNVHRMEBTAD
     AQH/MA0GCSqGSIb3DQEBBAUAA4IBAQC1uYBcsSncwA..DCsQer772C2ucpX
     xQUE/C0pWWm6gDkwd5D0DSMDJRqV/weoZ4wC6B73f5..bLhGYHaXJeSD6Kr
     XcoOwLdSaGmJYslLKZB3ZIDEp0wYTGhgteb6JFiTtn..sf2xdrYfPCiIB7g
     BMAV7Gzdc4VspS6ljrAhbiiawdBiQlQmsBeFz9JkF4..b3l8BoGN+qMa56Y
     It8una2gY4l2O//on88r5IWJlm1L0oA8e4fR2yrBHX..adsGeFKkyNrwGi/
     7vQMfXdGsRrXNGRGnX+vWDZ3/zWI0joDtCkNnqEpVn..HoX
     -----END CERTIFICATE-----
     kind: Secret
     metadata:
           name: ca-certs
           namespace: px-backup

   • Pass the secret name to the chart using --set caCertsSecretName=<SECRET_NAME> flag.
     

2. Expose Portworx Backup user interface on openshift routes and access using http and https:

   • Create a single route with hostname and path / and point it to the px-central-ui service.

   • Access Portworx Backup UI using route endpoint.

     note

     Keycloak authentication and Grafana UI are accessible on the same endpoint on different paths: /auth and /grafana.

Portworx Enterprise

The configuration to Portworx Enterprise depends on how you deployed it. For more information, refer to Certificates as Kubernetes Secrets.