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12.4. Editing an egress firewall for a project

As a cluster administrator, you can modify network traffic rules for an existing egress firewall.

12.4.1. Editing an EgressNetworkPolicy object
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As a cluster administrator, you can update the egress firewall for a project.

Prerequisites

  • A cluster using the OpenShift SDN network plug-in.
  • Install the OpenShift CLI (oc).
  • You must log in to the cluster as a cluster administrator.

Procedure

To edit an existing egress network policy object for a project, complete the following steps:

  1. Find the name of the EgressNetworkPolicy object for the project. Replace <project> with the name of the project. 

    $ oc get -n <project> egressnetworkpolicy
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  2. Optional: If you did not save a copy of the EgressNetworkPolicy object when you created the egress network firewall, enter the following command to create a copy. 

    $ oc get -n <project> \
    1 
    
  egressnetworkpolicy <name> \
    2 
    
  -o yaml > <filename>.yaml
    3
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    1
    Replace <project> with the name of the project
    2
    Replace <name> with the name of the object.
    3
    Replace <filename> with the name of the file to save the YAML.

  3. Enter the following command to replace the EgressNetworkPolicy object. Replace <filename> with the name of the file containing the updated EgressNetworkPolicy object. 

    $ oc replace -f <filename>.yaml
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12.4.2. EgressNetworkPolicy custom resource (CR) object
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The following YAML describes an EgressNetworkPolicy CR object: 

apiVersion: network.openshift.io/v1
kind: EgressNetworkPolicy
metadata:
  name: <name>
1 

spec:
  egress:
2 

    ...
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1
Specify a name for your egress firewall policy.
2
Specify a collection of one or more egress network policy rules as described in the following section.

12.4.2.1. EgressNetworkPolicy rules
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The following YAML describes an egress firewall rule object. The egress key expects an array of one or more objects. 

egress:
- type: <type>
1 

  to:
2 

    cidrSelector: <cidr>
3 

    dnsName: <dns-name>
4
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1
Specify the type of rule. The value must be either Allow or Deny.
2
Specify a value for either the cidrSelector key or the dnsName key for the rule. You cannot use both keys in a rule.
3
Specify an IP address range in CIDR format.
4
Specify a domain name.

12.4.2.2. Example EgressNetworkPolicy CR object
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The following example defines several egress firewall policy rules: 

apiVersion: network.openshift.io/v1
kind: EgressNetworkPolicy
metadata:
  name: default-rules
1 

spec:
  egress:
2 

  - type: Allow
    to:
      cidrSelector: 1.2.3.0/24
  - type: Allow
    to:
      dnsName: www.example.com
  - type: Deny
    to:
      cidrSelector: 0.0.0.0/0
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1
The name for the policy object.
2
A collection of egress firewall policy rule objects.
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