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* initial commit * background policy validation * correct message * skip non-background policy process for add/update * add Generate Request CR * generate Request Generator Initial * test generate request CR generation * initial commit gr generator * generate controller initial framework * add crd for generate request * gr cleanup controller initial commit * cleanup controller initial * generate mid-commit * generate rule processing * create PV on generate error * embed resource type * testing phase 1- generate resources with variable substitution * fix tests * comment broken test #586 * add printer column for state * return if existing resource for clone * set resync time to 2 mins & remove resource version check in update handler for gr * generate events for reporting * fix logs * initial commit * fix trailing quote in patch * remove comments * initial condition (equal & notequal) * initial support for conditions * initial support fo conditions in generate * support precondition checks * cleanup * re-evaluate GR on namespace update using dynamic informers * add status for generated resources * display loaded variable SA * support delete cleanup of generate request main resources * fix log * remove namespace from SA username * support multiple variables per statement for scalar values * fix fail variables * add check for userInfo * validation checks for conditions * update policy * refactor logs * code review * add openapispec for clusterpolicy preconditions * Update documentation * CR fixes * documentation * CR fixes * update variable * fix logs * update policy * pre-defined variables (serviceAccountName & serviceAccountNamespace) * update test
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1 KiB
Default deny all ingress traffic
By default, Kubernetes allows communications across all pods within a cluster. Network policies and, a CNI that supports network policies, must be used to restrict communinications.
A default NetworkPolicy should be configured for each namespace to default deny all ingress traffic to the pods in the namespace. Application teams can then configure additional NetworkPolicy resources to allow desired traffic to application pods from select sources.
Policy YAML
apiVersion: kyverno.io/v1
kind: ClusterPolicy
metadata:
name: add-networkpolicy
spec:
rules:
- name: default-deny-ingress
match:
resources:
kinds:
- Namespace
name: "*"
generate:
kind: NetworkPolicy
name: default-deny-ingress
namespace: "{{request.object.metadata.name}}"
data:
spec:
# select all pods in the namespace
podSelector: {}
policyTypes:
- Ingress