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Add release note about cert expiration #9781

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Aug 19, 2020
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Add release note about cert expiration #9781

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10 changes: 7 additions & 3 deletions docs/releases/1.19-NOTES.md
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Expand Up @@ -29,13 +29,17 @@ If you already have a default `StorageClass`, you should set `cloudConfig.Openst

* Clusters using the Amazon VPC CNI provider now perform an `ec2.DescribeInstanceTypes` call at instance launch time. In large clusters or AWS accounts this may lead to API throttling which could delay node readiness. If this becomes a problem please open a GitHub issue.

* Alpha support for Hashicorp Vault as store for secrets and keys. See the [Vault state store docs](/state/#vault-vault).
* There is now Alpha support for Hashicorp Vault as a store for secrets and keys. See the [Vault state store docs](/state/#vault-vault).

* New clusters running Cilium will have enabled BPF NodePort by default if kubernetes version is 1.12 or newer.
* New clusters running Cilium now enable BPF NodePort by default if the Kubernetes version is 1.12 or newer.

* The `kops update cluster` command will now refuse to run on a cluster that
has been updated by a newer version of kops unless it is given the `--allow-kops-downgrade` flag.

* The lifetimes of certificates used by various components have been substantially reduced.
The certificates on a node will expire sometime between 455 and 485 days after the node's creation.
The expiration times vary randomly so that nodes are likely to have their certs expire at different times than other nodes.

# Breaking changes

* Support for Kubernetes 1.9 and 1.10 has been removed.
Expand All @@ -46,7 +50,7 @@ has been updated by a newer version of kops unless it is given the `--allow-kops

# Required Actions

* See note about Openstack Cinder plugin above.
* See note about [Openstack Cinder plugin](#openstack-cinder-plugin) above.

# Deprecations

Expand Down