10장. Configuring a proxy for external network access


If your network configuration restricts outbound traffic through proxies, you can configure proxy settings in Red Hat Advanced Cluster Security for Kubernetes to route traffic through a proxy.

When you use a proxy with Red Hat Advanced Cluster Security for Kubernetes:

  • All outgoing HTTP, HTTPS, and other TCP traffic from Central and Scanner goes through the proxy.
  • Traffic between Central and Scanner does not go through the proxy.
  • The proxy configuration does not affect the other Red Hat Advanced Cluster Security for Kubernetes components.
  • When you are not using the offline mode, and a Collector running in a secured cluster needs to download an additional eBPF probe at runtime:

    • The collector attempts to download them by contacting Sensor.
    • The Sensor then forwards this request to Central.
    • Central uses the proxy to locate the module or probe at https://collector-modules.stackrox.io.

10.1. Configuring a proxy on an existing deployment

To configure a proxy in an existing deployment, you must export the proxy-config secret as a YAML file, update your proxy configuration in that file, and upload it as a secret.

참고

If you have configured a global proxy on your OpenShift Container Platform cluster, the Operator Lifecycle Manager (OLM) automatically configures Operators that it manages with the cluster-wide proxy. However, you can also configure installed Operators to override the global proxy or inject a custom certificate authority (CA) certificate.

For more information, see Configuring proxy support in Operator Lifecycle Manager.

Procedure

  1. Save the existing secret as a YAML file:

    $ oc -n stackrox get secret proxy-config \
      -o go-template='{{index .data "config.yaml" | \
      base64decode}}{{"\n"}}' > /tmp/proxy-config.yaml
  2. Edit the fields you want to modify in the YAML configuration file, for example:

        # # NOTE: Both central and scanner should be restarted if this secret is changed.
        # # While it is possible that some components will pick up the new proxy configuration
        # # without a restart, it cannot be guaranteed that this will apply to every possible
        # # integration etc.
        # url: http://proxy.name:port
        # username: username
        # password: password
        # # If the following value is set to true, the proxy wil NOT be excluded for the default hosts:
        # # - *.stackrox, *.stackrox.svc
        # # - localhost, localhost.localdomain, 127.0.0.0/8, ::1
        # # - *.local
        # omitDefaultExcludes: false
        # excludes:  # hostnames (may include * components) for which you do not
        # # want to use a proxy, like in-cluster repositories.
        # - some.domain
        # # The following configuration sections allow specifying a different proxy to be used for HTTP(S) connections.
        # # If they are omitted, the above configuration is used for HTTP(S) connections as well as TCP connections.
        # # If only the `http` section is given, it will be used for HTTPS connections as well.
        # # Note: in most cases, a single, global proxy configuration is sufficient.
        # http:
        #   url: http://http-proxy.name:port
        #   username: username
        #   password: password
        # https:
        #   url: http://https-proxy.name:port
        #   username: username
        #   password: password
  3. After you save the changes, run the following command to replace the secret:

    $ oc -n stackrox create secret generic proxy-config \
      --from-file=config.yaml=/tmp/proxy-config.yaml -o yaml --dry-run | \
      oc label -f - --local -o yaml app.kubernetes.io/name=stackrox | \
      oc apply -f -
  • You must wait for at least 1 minute, until OpenShift Container Platform propagates your changes to Central and Scanner.
  • If you see any issues with outgoing connections after changing the proxy configuration, you must restart your Central and Scanner pods.
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