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Rolling Upgrades

Using DataPlane

This method is only available when running in hybrid mode

To change the image used for your DataPlane resources, set the spec.deployment.podTemplateSpec.spec.containers[].image field in your resource:

kubectl edit dataplane dataplane-example -n kong

Once the resource is saved, Kubernetes will perform a rolling upgrade of your Pods.

Using GatewayConfiguration

This method is only available when running in DB-less mode

The GatewayConfiguration API can be used to provide the image and the image version desired for either the ControlPlane or DataPlane component of the Gateway e.g.:

kind: GatewayConfiguration
apiVersion: gateway-operator.konghq.com/v1beta1
metadata:
  name: kong
  namespace: default
spec:
  dataPlaneOptions:
    deployment:
      podTemplateSpec:
        spec:
          containers:
          - name: proxy
            image: kong/kong-gateway:3.8.1.0
  controlPlaneOptions:
    deployment:
      podTemplateSpec:
        spec:
          containers:
          - name: controller
            image: kong/kubernetes-ingress-controller:3.3.1

The above configuration will deploy all DataPlane resources connected to the GatewayConfiguration (by way of GatewayClass) using kong/kong-gateway:3.8.1.0 and any ControlPlane will be deployed with kong/kubernetes-ingress-controller:3.3.1.

Given the above, a manual upgrade or downgrade can be performed simply by changing the version. For example: assuming that at least one Gateway is currently deployed and running using the above GatewayConfiguration, an upgrade could be performed by running the following:

kubectl edit gatewayconfiguration kong

And updating the proxy container image tag in spec.dataPlaneOptions.deployment.podTemplateSpec.spec to 3.3 like so: kong/kong-gateway:3.3. The result will be a replacement Pod will roll out with the old version and once healthy the old Pod will be terminated.