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endpoint.go
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endpoint.go
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// Copyright (c) 2018 Tigera, Inc. 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 azure
import (
"bytes"
"encoding/json"
"fmt"
"os"
"github.com/natefinch/atomic"
"github.com/sirupsen/logrus"
)
// AzureEndpoint represents a container networked using Calico in conjunction with
// the azure-vnet-ipam plugin. We need to store state about the containers we've networked
// so we can pass the correct information to the IPAM plugin on delete. This structure
// handles the manipulation of that state.
type AzureEndpoint struct {
Network string
ContainerID string
Interface string
Addresses []string
}
func (ae *AzureEndpoint) Write() error {
b, err := json.Marshal(ae)
if err != nil {
return err
}
r := bytes.NewReader(b)
if err := atomic.WriteFile(ae.filename(), r); err != nil {
return err
}
logrus.Infof("Stored AzureEndpoint: %#v", ae)
return nil
}
func (ae *AzureEndpoint) Load() error {
bytes, err := os.ReadFile(ae.filename())
if err != nil {
return nil
}
logrus.Infof("Loaded AzureEndpoint: %s", bytes)
return json.Unmarshal(bytes, ae)
}
func (ae *AzureEndpoint) Delete() error {
logrus.Infof("Deleting AzureEndpoint: %#v", ae)
return os.Remove(ae.filename())
}
func (ae *AzureEndpoint) filename() string {
return fmt.Sprintf("%s/%s/%s-%s",
networksDir,
ae.Network,
ae.ContainerID,
ae.Interface,
)
}