Experimental: High Availabilty

Linkerd can be ran in High Availability or HA mode.

This feature is experimental and it’s only available in the edge release.

Here’s a short description of what --ha does to the linkerd install.

  • Defaults the controller replicas to 3
  • Set’s sane cpu + memory requests to the linkerd control plane components.
  • Defaults to a sensible requests for the sidecar containers for the control plane + auto proxy injection.

Setup

Because it’s the control plane that requires the ha config, you’ll need to use the install command with the ha flag.

linkerd install --ha | kubectl apply -f

You can also override the amount of controller replicas that you wish to run by passing in the --controller-replicas flag

linkerd install --ha --controller-replicas=2 | kubectl apply -f