github.com/sealerio/sealer@v0.11.1-0.20240507115618-f4f89c5853ae/utils/shellcommand/hostsfile.go (about)

     1  // Copyright © 2022 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package shellcommand
    16  
    17  import (
    18  	"fmt"
    19  )
    20  
    21  const DefaultSealerHostAliasAnnotation = "#hostalias-set-by-sealer"
    22  
    23  func CommandSetHostAlias(hostName, ip string) string {
    24  	return fmt.Sprintf(`if grep " %s " /etc/hosts &>/dev/null;then sed -i "/\ %s\ /d" /etc/hosts; fi;echo "%s %s %s" >>/etc/hosts`, hostName, hostName, ip, hostName, DefaultSealerHostAliasAnnotation)
    25  }
    26  
    27  func CommandUnSetHostAlias() string {
    28  	return fmt.Sprintf(`echo "$(sed "/%s/d" /etc/hosts)" > /etc/hosts`, DefaultSealerHostAliasAnnotation)
    29  }