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Version: v2.0-v2.4

Adding Kubernetes TLS Secrets

Kubernetes will create all the objects and services for Rancher, but it will not become available until we populate the tls-rancher-ingress secret in the cattle-system namespace with the certificate and key.

Combine the server certificate followed by any intermediate certificate(s) needed into a file named tls.crt. Copy your certificate key into a file named tls.key.

Use kubectl with the tls secret type to create the secrets.

kubectl -n cattle-system create secret tls tls-rancher-ingress \
--cert=tls.crt \

Note: If you want to replace the certificate, you can delete the tls-rancher-ingress secret using kubectl -n cattle-system delete secret tls-rancher-ingress and add a new one using the command shown above. If you are using a private CA signed certificate, replacing the certificate is only possible if the new certificate is signed by the same CA as the certificate currently in use.

Using a Private CA Signed Certificate

If you are using a private CA, Rancher requires a copy of the private CA's root certificate or certificate chain, which the Rancher Agent uses to validate the connection to the server.

Create a file named cacerts.pem that only contains the root CA certificate or certificate chain from your private CA, and use kubectl to create the tls-ca secret in the cattle-system namespace.

Important: Make sure the file is called cacerts.pem as Rancher uses that filename to configure the CA certificate.

kubectl -n cattle-system create secret generic tls-ca \