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Configure a Custom Domain without a Custom Certificate

To configure Kommander to use a custom domain, the domain name must be provided in an installation config file. If you want to set up a custom domain and certificate, refer to Configure the Kommander Installation with a Custom Domain and Certificate.

  1. Open the Kommander Installer Configuration File or <kommander.yaml> file:

    1. If you do not have the <kommander.yaml> file, initialize the configuration file, so you can edit it in the following steps. WARNING: Initialize this file only ONCE, otherwise you will overwrite previous customizations.

    2. If you have initialized the configuration file already, open the <kommander.yaml> with the editor of your choice.

  2. In that file, configure the custom domain for your cluster by adding this line:

    clusterHostname: <>
  3. This configuration can be used when installing or reconfiguring Kommander by passing it to the dkp install kommander command:

    dkp install kommander --installer-config <kommander.yaml> --kubeconfig=${CLUSTER_NAME}.conf

    Note: To ensure Kommander is installed on the right cluster, use the --kubeconfig=cluster_name.conf flag as an alternative to KUBECONFIG.

  4. After the command completes, obtain the cluster ingress IP address or hostname using the following command:

    kubectl -n kommander get svc kommander-traefik -o go-template='{{with index .status.loadBalancer.ingress 0}}{{or .hostname .ip}}{{end}}{{ "\n"}}'

If required, create a DNS record (for example, by using external-dns) for your custom hostname that resolves to the cluster ingress load balancer hostname or IP address. If the previous command returns a hostname, you should create a CNAME DNS entry that resolves to that hostname. If the cluster ingress is an IP address, create a DNS A record.

The domain must be resolvable from the client (your browser) and from the cluster. If you set up an external-dns service, it will take care of pointing the DNS record to the ingress of the cluster automatically. If you are manually creating a DNS record, you have to install Kommander first to obtain the load balancer address required for the DNS record. The Configure a Custom Certificate page contains more details and examples on how and when to set up the DNS record.

Related topics:

Why to set up a Custom Domain or Certificate?

Configure the Kommander Installation with a Custom Domain and Certificate

Advanced Configuration: Important Concepts

Advanced Configuration: ClusterIssuer

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