solutions/gke/kubernetes/cluster-defaults/default-namespace/networkpolicy.yaml

# Copyright 2021 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#      http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#########
# AC-4, AC-4(21), SC-7(5), SC-7(9), SC-7(11) - Network Policies to allow or deny ingress and egress traffic to/from default namespace
# Allow ingress within namespace
kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
metadata:
  namespace: default
  name: allow-ingress-within-default-namespace
spec:
  podSelector: {}
  # AC-4, AC-4(21), SC-7(5), SC-7(9), SC-7(11)
  ingress:
    # From all pods within the same namespace
    - from:
        - podSelector: {}
---
# Allow egress within namespace
kind: NetworkPolicy
apiVersion: networking.k8s.io/v1
metadata:
  namespace: default
  name: allow-egress-within-default-namespace
spec:
  podSelector: {}
  # AC-4, AC-4(21), SC-7(5), SC-7(9), SC-7(11)
  egress:
    # To all pods within the same namespace
    - to:
        - podSelector: {}