Editing a network policy

Editing a network policy
Example NetworkPolicy object
Additional resources

As a user with the admin role, you can edit an existing network policy for a namespace.

You can edit a network policy in a namespace.

If you log in with a user with the cluster-admin role, then you can edit a network policy in any namespace in the cluster.

Prerequisites

Your cluster uses a cluster network provider that supports NetworkPolicy objects, such as the OVN-Kubernetes network provider or the OpenShift SDN network provider with mode: NetworkPolicy set. This mode is the default for OpenShift SDN.
You installed the OpenShift CLI (oc).
You are logged in to the cluster with a user with admin privileges.
You are working in the namespace where the network policy exists.

Procedure

Optional: To list the network policy objects in a namespace, enter the following command:
```
$ oc get networkpolicy -n <namespace>
```
where:

<namespace>

Optional: Specifies the namespace if the object is defined in a different namespace than the current namespace.
Edit the NetworkPolicy object.
- If you saved the network policy definition in a file, edit the file and make any necessary changes, and then enter the following command.
  $ oc apply -n <namespace> -f <policy_file>.yaml
  where:
  
  <namespace>
  
  Optional: Specifies the namespace if the object is defined in a different namespace than the current namespace.
  
  <policy_file>
  
  Specifies the name of the file containing the network policy.
- If you need to update the NetworkPolicy object directly, enter the following command:
  $ oc edit networkpolicy <policy_name> -n <namespace>
  where:
  
  <policy_name>
  
  Specifies the name of the network policy.
  
  <namespace>
  
  Optional: Specifies the namespace if the object is defined in a different namespace than the current namespace.
Confirm that the NetworkPolicy object is updated.
```
$ oc describe networkpolicy <policy_name> -n <namespace>
```
where:

<policy_name>

Specifies the name of the network policy.

<namespace>

Optional: Specifies the namespace if the object is defined in a different namespace than the current namespace.

Example NetworkPolicy object

The following annotates an example NetworkPolicy object:

kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
metadata:
  name: allow-27107 (1)
spec:
  podSelector: (2)
    matchLabels:
      app: mongodb
  ingress:
  - from:
    - podSelector: (3)
        matchLabels:
          app: app
    ports: (4)
    - protocol: TCP
      port: 27017

1	The name of the NetworkPolicy object.
2	A selector that describes the pods to which the policy applies. The policy object can only select pods in the project that defines the NetworkPolicy object.
3	A selector that matches the pods from which the policy object allows ingress traffic. The selector matches pods in the same namespace as the NetworkPolicy.
4	A list of one or more destination ports on which to accept traffic.

Additional resources

Creating a network policy