mirror of
https://github.com/rancher/rancher-docs.git
synced 2026-05-06 05:03:27 +00:00
Tony Hansen
674ae23ce1
Fixed command to generate CA certificate to match working command from https://ranchermanager.docs.rancher.com/getting-started/installation-and-upgrade/resources/update-rancher-certificate Old command results in failures
50 lines
2.4 KiB
Markdown
50 lines
2.4 KiB
Markdown
---
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title: Adding TLS Secrets
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---
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<head>
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<link rel="canonical" href="https://ranchermanager.docs.rancher.com/getting-started/installation-and-upgrade/resources/add-tls-secrets"/>
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</head>
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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.
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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`.
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For example, [acme.sh](https://acme.sh) provides server certificate and CA chains in `fullchain.cer` file.
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This `fullchain.cer` should be renamed to `tls.crt` & certificate key file as `tls.key`.
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Use `kubectl` with the `tls` secret type to create the secrets.
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```
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kubectl -n cattle-system create secret tls tls-rancher-ingress \
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--cert=tls.crt \
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--key=tls.key
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```
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:::note
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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.
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:::
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## Using a Private CA Signed Certificate
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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.
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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.
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```
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kubectl -n cattle-system create secret generic tls-ca \
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--from-file=cacerts.pem
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```
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:::note
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The configured `tls-ca` secret is retrieved when Rancher starts. On a running Rancher installation the updated CA will take effect after new Rancher pods are started.
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:::
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## Updating a Private CA Certificate
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Follow the steps on [this page](update-rancher-certificate.md) to update the SSL certificate of the ingress in a Rancher [high availability Kubernetes installation](../install-upgrade-on-a-kubernetes-cluster/install-upgrade-on-a-kubernetes-cluster.md) or to switch from the default self-signed certificate to a custom certificate.
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