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Lifecycle automation upgrade
In this guide, we’ll show you how to perform zero-downtime upgrades for BEL using lifecycle automation capabilities.
Step 0: Get your license key
BEL requires a valid license key to run, which is freely available through the Buoyant portal. Following the instructions there, you should end up with an environment variable like this:
export BUOYANT_LICENSE=[LICENSE]
The commands below require that you have this environment variable set.
Step 1: Upgrading the CLI tool
The first step is to download and install the updated BEL CLI:
curl --proto '=https' --tlsv1.2 -sSfL https://enterprise.buoyant.io/install | sh
Alternatively, you can download the CLI directly via the BEL releases page.
Verify that the CLI is installed and running the expected version with:
linkerd version --client
You should see:
Client version: enterprise-2.15.2
Step 2: Upgrading BEL
With BEL’s lifecycle automation capabilities, it’s easy to change the version of
Linkerd that’s running on your cluster. Simply change the Linkerd version
specified in the ControlPlane
resource, by running:
kubectl edit controlplane/cp-update
The control plane operator will first upgrade the Linkerd core control plane,
and once that successfully completes, the data plane operator will restart each
workload selected by the DataPlane
resources, so that the pods will pick up a
new version of the Linkerd proxy.