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legacy-changes.md

Aug 11 2016 ¶

Reworked SSH keys and support for running CI builds

SSH keys are now stored as secrets. --ssh-public-key will be created when you do kops create cluster. You no longer need to specify a --ssh-public-key when you do an update, but if you do it will be imported.
An SSH public key must exist for AWS, if you do not have one you can import one with: kops create secret --name $CLUSTER_NAME sshpublickey admin -i ~/.ssh/id_rsa.pub
For AWS, only a single SSH key can be used; you can delete extra keys with kops delete secret
To support changing SSH keys reliably, the name of the imported AWS SSH keypair will change to include the OpenSSH key fingerprint. Existing clusters will continue to work, but you will likely be prompted to do a rolling update when you would otherwise not have to. I suggest waiting till you next upgrade kubernetes.
Builds that are not published as Docker images can be run. kops will pass a list of images in the NodeUp configuration, and NodeUp will download and docker load these images. For examples, see the testing tips

More rational model/UX - kops create cluster just creates spec, kops update cluster does real creation:

kops create cluster now creates the spec, but will not normally create the actual cloud resources. You can specify --yes to force immediate creation if you want to. create will now fail on an existing cluster.
kops update cluster will now apply changes from the spec to the cloud - it will create or update your cluster. It also defaults to dryrun mode, so you should pass --yes (normally after checking the preview).
Most commands accept positional arguments for the cluster name (you can specify kops update cluster <name>, instead of kops update cluster --name <name>)
Dry-run should be the default for anything that makes changes to cloud resources. Pass --yes to confirm. (cleaning up an inconsistency between --dryrun and --yes by removing --dryrun and making it the default)