github.com/sacloud/libsacloud/v2@v2.32.3/helper/service/loadbalancer/builder.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 loadbalancer
    16  
    17  import (
    18  	"context"
    19  	"errors"
    20  
    21  	"github.com/sacloud/libsacloud/v2/helper/wait"
    22  	"github.com/sacloud/libsacloud/v2/pkg/util"
    23  	"github.com/sacloud/libsacloud/v2/sacloud"
    24  	"github.com/sacloud/libsacloud/v2/sacloud/types"
    25  )
    26  
    27  type Builder struct {
    28  	ID   types.ID
    29  	Zone string
    30  
    31  	Name               string
    32  	Description        string
    33  	Tags               types.Tags
    34  	IconID             types.ID
    35  	SwitchID           types.ID
    36  	PlanID             types.ID
    37  	VRID               int
    38  	IPAddresses        []string
    39  	NetworkMaskLen     int
    40  	DefaultRoute       string
    41  	VirtualIPAddresses sacloud.LoadBalancerVirtualIPAddresses
    42  
    43  	NoWait       bool
    44  	SettingsHash string // for update
    45  	Client       sacloud.LoadBalancerAPI
    46  }
    47  
    48  func (b *Builder) Build(ctx context.Context) (*sacloud.LoadBalancer, error) {
    49  	if b.ID.IsEmpty() {
    50  		return b.create(ctx)
    51  	}
    52  	return b.update(ctx)
    53  }
    54  
    55  func (b *Builder) create(ctx context.Context) (*sacloud.LoadBalancer, error) {
    56  	created, err := b.Client.Create(ctx, b.Zone, &sacloud.LoadBalancerCreateRequest{
    57  		SwitchID:           b.SwitchID,
    58  		PlanID:             b.PlanID,
    59  		VRID:               b.VRID,
    60  		IPAddresses:        b.IPAddresses,
    61  		NetworkMaskLen:     b.NetworkMaskLen,
    62  		DefaultRoute:       b.DefaultRoute,
    63  		Name:               b.Name,
    64  		Description:        b.Description,
    65  		Tags:               b.Tags,
    66  		IconID:             b.IconID,
    67  		VirtualIPAddresses: b.VirtualIPAddresses,
    68  	})
    69  	if err != nil {
    70  		return nil, err
    71  	}
    72  	if b.NoWait {
    73  		return created, nil
    74  	}
    75  	return wait.UntilLoadBalancerIsUp(ctx, b.Client, b.Zone, created.ID)
    76  }
    77  
    78  func (b *Builder) validateForUpdate(current *sacloud.LoadBalancer) error {
    79  	if current.SwitchID != b.SwitchID {
    80  		return errors.New("SwitchID cannot be changed")
    81  	}
    82  	if current.PlanID != b.PlanID {
    83  		return errors.New("PlanID cannot be changed")
    84  	}
    85  	if current.VRID != b.VRID {
    86  		return errors.New("VRID cannot be changed")
    87  	}
    88  	if !util.DeepEqual(current.IPAddresses, b.IPAddresses) {
    89  		return errors.New("IPAddresses cannot be changed")
    90  	}
    91  	if current.NetworkMaskLen != b.NetworkMaskLen {
    92  		return errors.New("NetworkMaskLen cannot be changed")
    93  	}
    94  	if current.DefaultRoute != b.DefaultRoute {
    95  		return errors.New("DefaultRoute cannot be changed")
    96  	}
    97  	return nil
    98  }
    99  
   100  func (b *Builder) update(ctx context.Context) (*sacloud.LoadBalancer, error) {
   101  	current, err := b.Client.Read(ctx, b.Zone, b.ID)
   102  	if err != nil {
   103  		return nil, err
   104  	}
   105  	if err := b.validateForUpdate(current); err != nil {
   106  		return nil, err
   107  	}
   108  
   109  	updated, err := b.Client.Update(ctx, b.Zone, b.ID, &sacloud.LoadBalancerUpdateRequest{
   110  		Name:               b.Name,
   111  		Description:        b.Description,
   112  		Tags:               b.Tags,
   113  		IconID:             b.IconID,
   114  		VirtualIPAddresses: b.VirtualIPAddresses,
   115  		SettingsHash:       b.SettingsHash,
   116  	})
   117  	if err != nil {
   118  		return nil, err
   119  	}
   120  	return updated, b.Client.Config(ctx, b.Zone, b.ID)
   121  }