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Copy pathcontroller.go
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Copy pathcontroller.go
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101 lines (86 loc) · 3.38 KB
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// Copyright 2024 Google LLC All Rights Reserved.
//
// 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.
package main
import (
"context"
"fmt"
compute "cloud.google.com/go/compute/apiv1"
"cloud.google.com/go/compute/apiv1/computepb"
"github.com/googleapis/gax-go/v2"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/types"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/log"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
)
typeruntimeClientinterface {
Get(ctx context.Context, key types.NamespacedName, obj client.Object, opts...client.GetOption) error
}
typeinstanceClientinterface {
SetSecurityPolicy(ctx context.Context, req*computepb.SetSecurityPolicyInstanceRequest, opts...gax.CallOption) (*compute.Operation, error)
}
typereconcileNodestruct {
// client can be used to retrieve objects from the APIServer.
clientruntimeClient
instanceClientinstanceClient
selector labels.Selector
securityPolicyURLstring
projectIDstring
processedNodesmap[string]bool
}
// Assert reconcileNode implements reconcile.Reconciler.
var_ reconcile.Reconciler=&reconcileNode{}
func (r*reconcileNode) Reconcile(ctx context.Context, request reconcile.Request) (reconcile.Result, error) {
log:=log.FromContext(ctx)
// Fetch the Node from the cache
node:=&corev1.Node{}
iferr:=r.client.Get(ctx, request.NamespacedName, node); err!=nil {
iferrors.IsNotFound(err) {
log.Info("Node not found, likely deleted", "name", request.NamespacedName.Name)
return reconcile.Result{}, nil
}
return reconcile.Result{}, fmt.Errorf("could not fetch Node: %+v", err)
}
// Print the node
nodeName:=node.Name
ifr.processedNodes[nodeName] {
log.Info("Already processed, skip reconciling", "node", nodeName)
return reconcile.Result{}, nil
}
nodeZone:=node.Labels["topology.gke.io/zone"]
log.Info("Reconciling Node", "name", nodeName, "zone", nodeZone)
// Check if node label matches the selector
if!r.selector.Matches(labels.Set(node.Labels)) {
log.Info("Node does not match label selector, skipping", "name", nodeName)
return reconcile.Result{}, nil
}
// Set Google Cloud Armor security policy for the instance
spReq:=&computepb.SetSecurityPolicyInstanceRequest{
Project: r.projectID,
Zone: nodeZone,
Instance: nodeName,
InstancesSetSecurityPolicyRequestResource: &computepb.InstancesSetSecurityPolicyRequest{
SecurityPolicy: &r.securityPolicyURL,
NetworkInterfaces: []string{"nic0"},
},
}
if_, err:=r.instanceClient.SetSecurityPolicy(ctx, spReq); err!=nil {
return reconcile.Result{}, fmt.Errorf("could not set security policy of instance: %+v", err)
}
log.Info("Set security policy successfully", "node", nodeName, "policy", r.securityPolicyURL)
r.processedNodes[nodeName] =true
return reconcile.Result{}, nil
}