github.com/sacloud/libsacloud/v2@v2.32.3/helper/service/ipaddress/update_host_name_service.go (about)

     1  // Copyright 2016-2022 The Libsacloud Authors
     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 ipaddress
    16  
    17  import (
    18  	"context"
    19  	"fmt"
    20  	"time"
    21  
    22  	"github.com/sacloud/libsacloud/v2/sacloud"
    23  )
    24  
    25  const (
    26  	defaultRetryMax      = 30
    27  	defaultRetryInterval = 10
    28  )
    29  
    30  func (s *Service) UpdateHostName(req *UpdateHostNameRequest) error {
    31  	return s.UpdateHostNameWithContext(context.Background(), req)
    32  }
    33  
    34  func (s *Service) UpdateHostNameWithContext(ctx context.Context, req *UpdateHostNameRequest) error {
    35  	if err := req.Validate(); err != nil {
    36  		return err
    37  	}
    38  
    39  	client := sacloud.NewIPAddressOp(s.caller)
    40  	_, err := client.Read(ctx, req.Zone, req.IPAddress)
    41  	if err != nil {
    42  		return err
    43  	}
    44  
    45  	if req.RetryMax == 0 {
    46  		req.RetryMax = defaultRetryMax
    47  	}
    48  	if req.RetryInterval == 0 {
    49  		req.RetryInterval = defaultRetryInterval
    50  	}
    51  
    52  	i := 0
    53  	success := false
    54  	for i < req.RetryMax {
    55  		if err := ctx.Err(); err != nil {
    56  			return fmt.Errorf("updating the HostName for %s failed: %s", req.IPAddress, err)
    57  		}
    58  		if _, err = client.UpdateHostName(ctx, req.Zone, req.IPAddress, req.HostName); err == nil {
    59  			success = true
    60  			break
    61  		}
    62  		time.Sleep(time.Duration(req.RetryInterval) * time.Second)
    63  		i++
    64  	}
    65  
    66  	if !success {
    67  		return fmt.Errorf("updating the HostName for %s failed: giving up on setting the HostName: max attempts exceeded", req.IPAddress)
    68  	}
    69  	return nil
    70  }