Chapter 16. Configuring the cluster-wide proxy

Procedure

1. Create a ConfigMap that contains any additional CA certificates required for proxying HTTPS connections.

   Note

   You can skip this step if the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.

   1. Create a file called user-ca-bundle.yaml with the following contents, and provide the values of your PEM-encoded certificates:

      apiVersion: v1
      data:
        ca-bundle.crt: | 1
          <MY_PEM_ENCODED_CERTS> 2
      kind: ConfigMap
      metadata:
        name: user-ca-bundle 3
        namespace: openshift-config 4

      1

      This data key must be named ca-bundle.crt.

      2

      One or more PEM-encoded X.509 certificates used to sign the proxy’s identity certificate.

      3

      The ConfigMap name that will be referenced from the Proxy object.

      4

      The ConfigMap must be in the openshift-config namespace.

   2. Create the ConfigMap from this file:

      $ oc create -f user-ca-bundle.yaml

2. Use the oc edit command to modify the Proxy object:

   $ oc edit proxy/cluster

3. Configure the necessary fields for the proxy:

   apiVersion: config.openshift.io/v1
   kind: Proxy
   metadata:
     name: cluster
   spec:
     httpProxy: http://<username>:<pswd>@<ip>:<port> 1
     httpsProxy: http://<username>:<pswd>@<ip>:<port> 2
     noProxy: example.com 3
     readinessEndpoints:
     - http://www.google.com 4
     - https://www.google.com
     trustedCA:
       name: user-ca-bundle 5

   1

   A proxy URL to use for creating HTTP connections outside the cluster. The URL scheme must be http.

   2

   A proxy URL to use for creating HTTPS connections outside the cluster. If this is not specified, then httpProxy is used for both HTTP and HTTPS connections.

   3

   A comma-separated list of destination domain names, domains, IP addresses or other network CIDRs to exclude proxying.

   Preface a domain with . to match subdomains only. For example, .y.com matches x.y.com, but not y.com. Use * to bypass proxy for all destinations. If you scale up workers that are not included in the network defined by the networking.machineNetwork[].cidr field from the installation configuration, you must add them to this list to prevent connection issues.

   This field is ignored if neither the httpProxy or httpsProxy fields are set.

   4

   One or more URLs external to the cluster to use to perform a readiness check before writing the httpProxy and httpsProxy values to status.

   5

   A reference to the ConfigMap in the openshift-config namespace that contains additional CA certificates required for proxying HTTPS connections. Note that the ConfigMap must already exist before referencing it here. This field is required unless the proxy’s identity certificate is signed by an authority from the RHCOS trust bundle.

4. Save the file to apply the changes.

Procedure

1. Use the oc edit command to modify the proxy:

   $ oc edit proxy/cluster

2. Remove all spec fields from the Proxy object. For example:

   apiVersion: config.openshift.io/v1
   kind: Proxy
   metadata:
     name: cluster
   spec: {}
   status: {}

3. Save the file to apply the changes.