Document upgrade procedure for Link-based multicluster
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@adleong is already working on this.
Since Jul 23, 2020.
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Description
In Linkerd 2.8.1, the multicluster addon contains a single service-mirror controller in the `linkerd-multicluster` namespace by default. We are moving to a model where there will be a service-mirror controller per linkerd target cluster.
We must document the steps for migrating from the old model to the new one, ideally without incurring multicluster downtime.
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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