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no_host_network.go
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/
no_host_network.go
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// Copyright 2019 Cruise 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
// https://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.package ingress
package pod
import (
"context"
admissionv1beta1 "k8s.io/api/admission/v1beta1"
"github.com/cruise-automation/k-rail/policies"
"github.com/cruise-automation/k-rail/resource"
)
type PolicyNoHostNetwork struct{}
func (p PolicyNoHostNetwork) Name() string {
return "pod_no_host_network"
}
func (p PolicyNoHostNetwork) Validate(ctx context.Context, config policies.Config, ar *admissionv1beta1.AdmissionRequest) ([]policies.ResourceViolation, []policies.PatchOperation) {
resourceViolations := []policies.ResourceViolation{}
podResource := resource.GetPodResource(ctx, ar)
if podResource == nil {
return resourceViolations, nil
}
violationText := "No Host Network: Using the host network is forbidden"
if podResource.PodSpec.HostNetwork {
resourceViolations = append(resourceViolations, policies.ResourceViolation{
Namespace: ar.Namespace,
ResourceName: podResource.ResourceName,
ResourceKind: podResource.ResourceKind,
Violation: violationText,
Policy: p.Name(),
})
}
return resourceViolations, nil
}