Using a custom certificate authority ¶
Background Info ¶
When deploying a
kops based Kubernetes cluster,
kops will generate a certificate authority keypair for signing
various certificates with. In some cases, you may want to provide your own CA keypair.
Another use case would be to use the CA keypair of another cluster if you are creating many short lived clusters and don't want to create a unique CA for each one.
Building a cluster with a custom CA ¶
The following procedure will allow you to override the CA when creating a cluster. For the sake of this example, you have two files
cluster-name.comshould be the cluster name you put in the
kops create -f cluster.yaml kops create secret keypair ca --cert ca.crt --key ca.key --name cluster-name.com kops update cluster --yes
- First we create the cluster folder structure in the statestore.
- Second, we create a
Keypairwith the name
caand provide our own values.
- Lastly, we run
kops update cluster --yes, which will generate all the certificates needed, referencing the
cawe just defined (versus generating its own).
Using a previous
kops cluster CA ¶
In some cases you will want to create a cluster and use the CA generated in a previous
To do so, you will need to copy the CA files from the state store, and then use them as values in the above procedure.
The files are located as follows: