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
For example, acme.sh provides server certificate and CA chains in
fullchain.cer should be renamed to
tls.crt & certificate key file as
kubectl with the
tls secret type to create the secrets.
kubectl -n cattle-system create secret tls tls-rancher-ingress \
Note: If you want to replace the certificate, you can delete the
kubectl -n cattle-system delete secret tls-rancher-ingressand 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
kubectl -n cattle-system create secret generic tls-ca \
Note: The configured
tls-casecret is retrieved when Rancher starts. On a running Rancher installation the updated CA will take effect after new Rancher pods are started.
Updating a Private CA Certificate
Follow the steps on this page to update the SSL certificate of the ingress in a Rancher high availability Kubernetes installation or to switch from the default self-signed certificate to a custom certificate.