forked from hyperledger/fabric
-
Notifications
You must be signed in to change notification settings - Fork 11
/
vm.go
129 lines (107 loc) · 3.43 KB
/
vm.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
/*
Copyright IBM Corp. 2016 All Rights Reserved.
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 container
import (
"archive/tar"
"bytes"
"compress/gzip"
"fmt"
"golang.org/x/net/context"
"github.com/fsouza/go-dockerclient"
"github.com/hyperledger/fabric/core/chaincode/platforms"
cutil "github.com/hyperledger/fabric/core/container/util"
pb "github.com/hyperledger/fabric/protos"
"github.com/op/go-logging"
)
// VM implemenation of VM management functionality.
type VM struct {
Client *docker.Client
}
// NewVM creates a new VM instance.
func NewVM() (*VM, error) {
client, err := cutil.NewDockerClient()
if err != nil {
return nil, err
}
VM := &VM{Client: client}
return VM, nil
}
var vmLogger = logging.MustGetLogger("container")
// ListImages list the images available
func (vm *VM) ListImages(context context.Context) error {
imgs, err := vm.Client.ListImages(docker.ListImagesOptions{All: false})
if err != nil {
return err
}
for _, img := range imgs {
fmt.Println("ID: ", img.ID)
fmt.Println("RepoTags: ", img.RepoTags)
fmt.Println("Created: ", img.Created)
fmt.Println("Size: ", img.Size)
fmt.Println("VirtualSize: ", img.VirtualSize)
fmt.Println("ParentId: ", img.ParentID)
}
return nil
}
// BuildChaincodeContainer builds the container for the supplied chaincode specification
func (vm *VM) BuildChaincodeContainer(spec *pb.ChaincodeSpec) ([]byte, error) {
chaincodePkgBytes, err := GetChaincodePackageBytes(spec)
if err != nil {
return nil, fmt.Errorf("Error getting chaincode package bytes: %s", err)
}
err = vm.buildChaincodeContainerUsingDockerfilePackageBytes(spec, chaincodePkgBytes)
if err != nil {
return nil, fmt.Errorf("Error building Chaincode container: %s", err)
}
return chaincodePkgBytes, nil
}
// GetChaincodePackageBytes creates bytes for docker container generation using the supplied chaincode specification
func GetChaincodePackageBytes(spec *pb.ChaincodeSpec) ([]byte, error) {
if spec == nil || spec.ChaincodeID == nil {
return nil, fmt.Errorf("invalid chaincode spec")
}
inputbuf := bytes.NewBuffer(nil)
gw := gzip.NewWriter(inputbuf)
tw := tar.NewWriter(gw)
platform, err := platforms.Find(spec.Type)
if err != nil {
return nil, err
}
err = platform.WritePackage(spec, tw)
if err != nil {
return nil, err
}
tw.Close()
gw.Close()
if err != nil {
return nil, err
}
chaincodePkgBytes := inputbuf.Bytes()
return chaincodePkgBytes, nil
}
// Builds the Chaincode image using the supplied Dockerfile package contents
func (vm *VM) buildChaincodeContainerUsingDockerfilePackageBytes(spec *pb.ChaincodeSpec, code []byte) error {
outputbuf := bytes.NewBuffer(nil)
vmName := spec.ChaincodeID.Name
inputbuf := bytes.NewReader(code)
opts := docker.BuildImageOptions{
Name: vmName,
InputStream: inputbuf,
OutputStream: outputbuf,
}
if err := vm.Client.BuildImage(opts); err != nil {
vmLogger.Errorf("Failed Chaincode docker build:\n%s\n", outputbuf.String())
return err
}
return nil
}