9.4. Editing a network policy
As a user with the admin role, you can edit an existing network policy for a namespace.
9.4.1. Editing a network policy
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
NetworkPolicyobjects, such as the OpenShift SDN network provider withmode: NetworkPolicyset. 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
adminprivileges. - 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
NetworkPolicyobject.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
NetworkPolicyobject 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
NetworkPolicyobject 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.
9.4.2. 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
nameof the NetworkPolicy object. - 2
- A selector describing the pods the policy applies to. The policy object can only select pods in the project that the NetworkPolicy object is defined.
- 3
- A selector matching the pods that the policy object allows ingress traffic from. The selector will match pods in any project.
- 4
- A list of one or more destination ports to accept traffic on.
