/
backend.go
130 lines (114 loc) · 3.79 KB
/
backend.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
package build // import "github.com/docker/docker/api/server/backend/build"
import (
"context"
"fmt"
"strconv"
"github.com/docker/distribution/reference"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/backend"
"github.com/docker/docker/api/types/events"
"github.com/docker/docker/builder"
buildkit "github.com/docker/docker/builder/builder-next"
daemonevents "github.com/docker/docker/daemon/events"
"github.com/docker/docker/image"
"github.com/docker/docker/pkg/stringid"
"github.com/pkg/errors"
"google.golang.org/grpc"
)
// ImageComponent provides an interface for working with images
type ImageComponent interface {
SquashImage(from string, to string) (string, error)
TagImageWithReference(image.ID, reference.Named) error
}
// Builder defines interface for running a build
type Builder interface {
Build(context.Context, backend.BuildConfig) (*builder.Result, error)
}
// Backend provides build functionality to the API router
type Backend struct {
builder Builder
imageComponent ImageComponent
buildkit *buildkit.Builder
eventsService *daemonevents.Events
}
// NewBackend creates a new build backend from components
func NewBackend(components ImageComponent, builder Builder, buildkit *buildkit.Builder, es *daemonevents.Events) (*Backend, error) {
return &Backend{imageComponent: components, builder: builder, buildkit: buildkit, eventsService: es}, nil
}
// RegisterGRPC registers buildkit controller to the grpc server.
func (b *Backend) RegisterGRPC(s *grpc.Server) {
if b.buildkit != nil {
b.buildkit.RegisterGRPC(s)
}
}
// Build builds an image from a Source
func (b *Backend) Build(ctx context.Context, config backend.BuildConfig) (string, error) {
options := config.Options
useBuildKit := options.Version == types.BuilderBuildKit
tagger, err := NewTagger(b.imageComponent, config.ProgressWriter.StdoutFormatter, options.Tags)
if err != nil {
return "", err
}
var build *builder.Result
if useBuildKit {
build, err = b.buildkit.Build(ctx, config)
if err != nil {
return "", err
}
} else {
build, err = b.builder.Build(ctx, config)
if err != nil {
return "", err
}
}
if build == nil {
return "", nil
}
var imageID = build.ImageID
if options.Squash {
if imageID, err = squashBuild(build, b.imageComponent); err != nil {
return "", err
}
if config.ProgressWriter.AuxFormatter != nil {
if err = config.ProgressWriter.AuxFormatter.Emit("moby.image.id", types.BuildResult{ID: imageID}); err != nil {
return "", err
}
}
}
if !useBuildKit {
stdout := config.ProgressWriter.StdoutFormatter
fmt.Fprintf(stdout, "Successfully built %s\n", stringid.TruncateID(imageID))
}
if imageID != "" {
err = tagger.TagImages(image.ID(imageID))
}
return imageID, err
}
// PruneCache removes all cached build sources
func (b *Backend) PruneCache(ctx context.Context, opts types.BuildCachePruneOptions) (*types.BuildCachePruneReport, error) {
buildCacheSize, cacheIDs, err := b.buildkit.Prune(ctx, opts)
if err != nil {
return nil, errors.Wrap(err, "failed to prune build cache")
}
b.eventsService.Log("prune", events.BuilderEventType, events.Actor{
Attributes: map[string]string{
"reclaimed": strconv.FormatInt(buildCacheSize, 10),
},
})
return &types.BuildCachePruneReport{SpaceReclaimed: uint64(buildCacheSize), CachesDeleted: cacheIDs}, nil
}
// Cancel cancels the build by ID
func (b *Backend) Cancel(ctx context.Context, id string) error {
return b.buildkit.Cancel(ctx, id)
}
func squashBuild(build *builder.Result, imageComponent ImageComponent) (string, error) {
var fromID string
if build.FromImage != nil {
fromID = build.FromImage.ImageID()
}
imageID, err := imageComponent.SquashImage(build.ImageID, fromID)
if err != nil {
return "", errors.Wrap(err, "error squashing image")
}
return imageID, nil
}