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TSB Helm Upgrade

This document explains how you can leverage Helm Charts to upgrade the different elements of TSB. The document assumes that Helm is already installed in the system.

This document only applies to TSB instances created with Helm, not to upgrade from TCTL based installations.

Before you start, make sure that you have:

✓ Checked the new version's requirements

Prerequisites​

  1. Helm installed
  2. TSB cli tctl installed
  3. kubectl installed
  4. Credentials for Tetrate's image repository

Configure the Helm repository​

  • Add the repository: 
    helm repo add tetrate-tsb-helm 'https://charts.dl.tetrate.io/public/helm/charts/'
    helm repo update
  • List the available versions: 
    helm search repo tetrate-tsb-helm -l

Backup the PostgreSQL database​

Create a backup of your PostgreSQL database.

The exact procedure for connecting to the database may differ depending on your environment, please refer to the documentation for your environment.

Upgrade process​

Verify the available TSB versions to upgrade and always aim to upgrade to the latest patch version:

helm search repo tetrate-tsb-helm --versions

And export the version as a variable:

export TSB_VERSION="<version-to-upgrade>"

Management Plane​

Upgrade the management plane chart:

helm upgrade mp tetrate-tsb-helm/managementplane --set image.registry=${HUB} --set image.tag=${TSB_VERSION} --namespace tsb -f values-mp.yaml

Control Plane​

Upgrade the control plane chart:

helm upgrade cp tetrate-tsb-helm/controlplane --set image.registry=${HUB} --set image.tag=${TSB_VERSION} --namespace istio-system -f values-cp.yaml --set-file secrets.clusterServiceAccount.JWK=/tmp/<cluster>.jwk

Data Plane​

Upgrade the control plane chart:

helm upgrade dp tetrate-tsb-helm/dataplane --set image.registry=${HUB} --set image.tag=${TSB_VERSION} --namespace istio-gateway -f values-dp.yaml

Check the upgrade is successful​

Once the upgrade is completed, review the following information from the Grafana dashboards to verify the upgrade status.

Management Plane dashboards​

  • TSB Health provides the status for the different management plane components. All of them must be green before and after the upgrade.

  • TSB Operational Status provides more details from the TSB API. Checking previous values and compare with the values after the upgrade will give an insight of the performance. It also shows the error rate and latency, not only for the TSB API but also for the Postgres database.

  • Global Configuration Distribution provides information about config propagation from the management plane to the control planes.

  • MPC Operational Status shows the latency or errors that config generation system have. It's important to compare the Get All Config Objects duration as it will show the performance after the upgrade. Received configs shouldn't be empty and it will also show the updates from the TSB API to XCP.

Control Plane dashboards​

  • Gitops Operational Status if Gitops is enabled in the control planes, provides information about accepted/rejected configurations and performance.

  • Control Plane Token Status shows if tokens are being rotated and if they are valid for each control plane.

  • XCP Edge status shows the status of XCP Edge in each control plane. Latency and performance for the Edges is shown and also if communication with Central is successful.

  • Istio Operational Status shows important information for each control plane like the error rate from istiod, the proxy convergence time and the time to root CA expiration.

Rollback​

In case something goes wrong and you want to rollback TSB to the previous version, you will need to rollback the Management Plane, the Control Planes and the Data Planes charts.

Rollback the Control Plane​

You can use helm rollback to rollback the current revision. To see the current revisions, you can run:

helm history cp -n istio-system

And then you can rollback to the previous revision:

helm rollback cp <REVISION> -n istio-system

Rollback the Management Plane​

Scale Down Pods in Management Plane​

Scale down all of the pods that talk to Postgres in the Management Plane so that the it is inactive.

kubectl scale deployment tsb iam -n tsb --replicas=0

Restore PostgreSQL​

Restore your PostgreSQL database from your backup. The exact procedure for connecting to the database may differ depending on your environment, please refer to the documentation for your environment.

Restore Management Plane​

helm rollback mp <REVISION> -n tsb