edge-21.4.4
This edge release further consolidates the control plane by removing the
linkerd-controller deployment and moving the sp-validator container into the
destination deployment.
Annotation inheritance has been added so that all Linkerd annotations
on a namespace resource will be inherited by pods within that namespace.
In addition, the config.linkerd.io/proxy-await annotation has been added which
enables the linkerd-await
functionality by default, simplifying the implementation of the await behavior.
Setting the annotation value to disabled will prevent this behavior.
Some of the linkerd check functionality has been updated. The command
ensures that annotations and labels are properly located in the YAML and adds
proxy checks for the control plane and extension pods.
Finally, the nginx container has been removed from the Multicluster gateway pod,
which will impact upgrades. Please see the note below.
Upgrade note: When the Multicluster extension is updated in both of the
source and target clusters there won't be any downtime because this change only
affects the readiness probe. The multicluster links must be re-generated with
the linkerd mc link command and the linkerd mc gateways will show
the target cluster as not alive until the linkerd mc link command is re-run,
however that shouldn't affect existing endpoints pointing to the target cluster.
- Added proxy checks for core control plane and extension pods
- Added support for awaiting proxy readiness using an annotation
- Added namespace annotation inheritance to pods
- Removed the linkerd-controller pod
- Moved sp-validator container into the destination deployment
- Added check verifying that labels and annotations are not mixed up
(thanks @Szymongib) - Enabled support for extra initContainers to the linkerd-cni daemonset
(thanks @mhulscher!) - Removed nginx container from multicluster gateway pod
- Added an error message when there is nothing to uninstall