/
npl_agent_init.go
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/
npl_agent_init.go
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// Copyright 2020 Antrea Authors
//
// 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 nodeportlocal
import (
"fmt"
coreinformers "k8s.io/client-go/informers/core/v1"
clientset "k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
nplk8s "antrea.io/antrea/pkg/agent/nodeportlocal/k8s"
"antrea.io/antrea/pkg/agent/nodeportlocal/portcache"
)
// InitializeNPLAgent initializes the NodePortLocal agent.
// It sets up event handlers to handle Pod add, update and delete events.
// When a Pod gets created, a free Node port is obtained from the port table cache and a DNAT rule is added to NAT traffic to the Pod's ip:port.
func InitializeNPLAgent(
kubeClient clientset.Interface,
serviceInformer coreinformers.ServiceInformer,
podInformer cache.SharedIndexInformer,
startPort int,
endPort int,
nodeName string,
) (*nplk8s.NPLController, error) {
portTable, err := portcache.NewPortTable(startPort, endPort)
if err != nil {
return nil, fmt.Errorf("error when initializing NodePortLocal port table: %v", err)
}
return nplk8s.NewNPLController(kubeClient, podInformer, serviceInformer.Informer(), portTable, nodeName), nil
}