forked from hashicorp/packer
/
builder.go
208 lines (173 loc) · 4.8 KB
/
builder.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
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
// The amazonebs package contains a packer.Builder implementation that
// builds AMIs for Amazon EC2.
//
// In general, there are two types of AMIs that can be created: ebs-backed or
// instance-store. This builder _only_ builds ebs-backed images.
package ebs
import (
"errors"
"fmt"
"github.com/mitchellh/goamz/aws"
"github.com/mitchellh/goamz/ec2"
"github.com/mitchellh/mapstructure"
"github.com/mitchellh/multistep"
"github.com/mitchellh/packer/builder/common"
"github.com/mitchellh/packer/packer"
"log"
"sort"
"strings"
"text/template"
"time"
)
// The unique ID for this builder
const BuilderId = "mitchellh.amazonebs"
type config struct {
// Access information
AccessKey string `mapstructure:"access_key"`
SecretKey string `mapstructure:"secret_key"`
// Information for the source instance
Region string
SourceAmi string `mapstructure:"source_ami"`
InstanceType string `mapstructure:"instance_type"`
SSHUsername string `mapstructure:"ssh_username"`
SSHPort int `mapstructure:"ssh_port"`
SecurityGroupId string `mapstructure:"security_group_id"`
// Configuration of the resulting AMI
AMIName string `mapstructure:"ami_name"`
PackerDebug bool `mapstructure:"packer_debug"`
RawSSHTimeout string `mapstructure:"ssh_timeout"`
// Unexported fields that are calculated from others
sshTimeout time.Duration
}
type Builder struct {
config config
runner multistep.Runner
}
func (b *Builder) Prepare(raws ...interface{}) error {
var md mapstructure.Metadata
decoderConfig := &mapstructure.DecoderConfig{
Metadata: &md,
Result: &b.config,
}
decoder, err := mapstructure.NewDecoder(decoderConfig)
if err != nil {
return err
}
for _, raw := range raws {
err := decoder.Decode(raw)
if err != nil {
return err
}
}
// Accumulate any errors
errs := make([]error, 0)
// Unused keys are errors
if len(md.Unused) > 0 {
sort.Strings(md.Unused)
for _, unused := range md.Unused {
if unused != "type" && !strings.HasPrefix(unused, "packer_") {
errs = append(
errs, fmt.Errorf("Unknown configuration key: %s", unused))
}
}
}
if b.config.SSHPort == 0 {
b.config.SSHPort = 22
}
if b.config.RawSSHTimeout == "" {
b.config.RawSSHTimeout = "1m"
}
// Accumulate any errors
if b.config.SourceAmi == "" {
errs = append(errs, errors.New("A source_ami must be specified"))
}
if b.config.InstanceType == "" {
errs = append(errs, errors.New("An instance_type must be specified"))
}
if b.config.Region == "" {
errs = append(errs, errors.New("A region must be specified"))
} else if _, ok := aws.Regions[b.config.Region]; !ok {
errs = append(errs, fmt.Errorf("Unknown region: %s", b.config.Region))
}
if b.config.SSHUsername == "" {
errs = append(errs, errors.New("An ssh_username must be specified"))
}
b.config.sshTimeout, err = time.ParseDuration(b.config.RawSSHTimeout)
if err != nil {
errs = append(errs, fmt.Errorf("Failed parsing ssh_timeout: %s", err))
}
if b.config.AMIName == "" {
errs = append(errs, errors.New("ami_name must be specified"))
} else {
_, err = template.New("ami").Parse(b.config.AMIName)
if err != nil {
errs = append(errs, fmt.Errorf("Failed parsing ami_name: %s", err))
}
}
if len(errs) > 0 {
return &packer.MultiError{errs}
}
log.Printf("Config: %+v", b.config)
return nil
}
func (b *Builder) Run(ui packer.Ui, hook packer.Hook, cache packer.Cache) (packer.Artifact, error) {
region, ok := aws.Regions[b.config.Region]
if !ok {
panic("region not found")
}
auth, err := aws.GetAuth(b.config.AccessKey, b.config.SecretKey)
if err != nil {
return nil, err
}
ec2conn := ec2.New(auth, region)
// Setup the state bag and initial state for the steps
state := make(map[string]interface{})
state["config"] = b.config
state["ec2"] = ec2conn
state["hook"] = hook
state["ui"] = ui
// Build the steps
steps := []multistep.Step{
&stepKeyPair{},
&stepSecurityGroup{},
&stepRunSourceInstance{},
&common.StepConnectSSH{
SSHAddress: sshAddress,
SSHConfig: sshConfig,
SSHWaitTimeout: b.config.sshTimeout,
},
&common.StepProvision{},
&stepStopInstance{},
&stepCreateAMI{},
}
// Run!
if b.config.PackerDebug {
b.runner = &multistep.DebugRunner{
Steps: steps,
PauseFn: common.MultistepDebugFn(ui),
}
} else {
b.runner = &multistep.BasicRunner{Steps: steps}
}
b.runner.Run(state)
// If there was an error, return that
if rawErr, ok := state["error"]; ok {
return nil, rawErr.(error)
}
// If there are no AMIs, then just return
if _, ok := state["amis"]; !ok {
return nil, nil
}
// Build the artifact and return it
artifact := &artifact{
amis: state["amis"].(map[string]string),
conn: ec2conn,
}
return artifact, nil
}
func (b *Builder) Cancel() {
if b.runner != nil {
log.Println("Cancelling the step runner...")
b.runner.Cancel()
}
}