This repository has been archived by the owner on Apr 22, 2022. It is now read-only.
/
container.go
254 lines (219 loc) · 6.5 KB
/
container.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
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
package bucc
import (
"context"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"os/exec"
"path/filepath"
"github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/container"
"github.com/docker/docker/api/types/mount"
"github.com/docker/docker/api/types/network"
"github.com/docker/docker/client"
"github.com/docker/docker/pkg/stdcopy"
"github.com/starkandwayne/molten-core/config"
)
const (
buccImage = "starkandwayne/mc-bucc:latest"
buccHostStateDir = "/var/lib/moltencore/bucc"
buccContainerStateDir = "/bucc/state"
credhubMoltenCorePath = "/concourse/main/moltencore"
)
type Client struct {
logger *log.Logger
config *config.NodeConfig
dcli *client.Client
}
func NewClient(l *log.Logger, conf *config.NodeConfig) (*Client, error) {
ctx := context.Background()
cli, err := client.NewClientWithOpts(client.FromEnv)
if err != nil {
return nil, fmt.Errorf("failed to create docker client: %s", err)
}
cli.NegotiateAPIVersion(ctx)
return &Client{logger: l, config: conf, dcli: cli}, nil
}
func (c *Client) Up() error {
if err := c.writeStateDir(); err != nil {
return err
}
return c.run([]string{
"/bucc/bin/bucc",
"up",
"--recreate",
"--cpi",
"docker",
"--unix-sock",
"--host-bind-concourse",
}, false)
}
func (c *Client) Shell() error {
return c.run([]string{"/bin/bash", "-c",
"/bin/bash --init-file <(echo 'source ~/.bashrc && bucc fly >/dev/null')"}, true)
}
func (c *Client) UpdateCloudConfig(confs *[]config.NodeConfig) error {
data, err := renderCloudConfig(confs)
if err != nil {
return fmt.Errorf("failed to render Cloud Config: %s", err)
}
return c.updateBoshConfig("cloud", data)
}
func (c *Client) UpdateCPIConfig(confs *[]config.NodeConfig) error {
data, err := renderCPIConfig(confs)
if err != nil {
return fmt.Errorf("failed to render CPI Config: %s", err)
}
return c.updateBoshConfig("cpi", data)
}
func (c *Client) UpdateRuntimeConfig(confs *[]config.NodeConfig) error {
return c.updateBoshConfig("runtime", renderRuntimeConfig())
}
func (c *Client) UpdateMoltenCoreConfig(confs *[]config.NodeConfig) error {
data, err := RenderMoltenCoreConfig(confs)
if err != nil {
return fmt.Errorf("failed to render MoltenCore Config: %s", err)
}
return c.credHubSet(credhubMoltenCorePath, data)
}
func (c *Client) updateBoshConfig(t, config string) error {
cmd := fmt.Sprintf("source <(/bucc/bin/bucc env) && bosh -n update-%s-config <(echo '%s')", t, config)
return c.run([]string{"/bin/bash", "-c", cmd}, false)
}
func (c *Client) credHubSet(path, config string) error {
cmd := fmt.Sprintf("source <(/bucc/bin/bucc env) && credhub set -n %s -t json -v '%s'", path, config)
return c.run([]string{"/bin/bash", "-c", cmd}, false)
}
func (c *Client) pullImage() error {
ctx := context.Background()
images, err := c.dcli.ImageList(ctx, types.ImageListOptions{})
if err != nil {
return fmt.Errorf("failed to list images: %s", err)
}
for _, img := range images {
for _, tag := range img.RepoTags {
if tag == buccImage {
return nil
}
}
}
c.logger.Printf("Pulling MoltenCore docker image, this can take a while")
reader, err := c.dcli.ImagePull(ctx, buccImage, types.ImagePullOptions{})
if err != nil {
return fmt.Errorf("failed to pull image %s: %s", buccImage, err)
}
defer reader.Close()
io.Copy(ioutil.Discard, reader)
return nil
}
func (c *Client) writeStateDir() error {
if err := os.MkdirAll(buccHostStateDir, 0775); err != nil {
return fmt.Errorf("failed to create state dir: %s", err)
}
err := writeVars(filepath.Join(buccHostStateDir, "vars.yml"), c.config)
if err != nil {
return fmt.Errorf("failed to write vars file: %s", err)
}
return nil
}
func (c *Client) run(entrypoint []string, tty bool) error {
if err := c.pullImage(); err != nil {
return err
}
// TODO limit ip range to reserved range
networks := make(map[string]*network.EndpointSettings)
networks[config.BOSHDockerNetworkName] = &network.EndpointSettings{}
ctx := context.Background()
resp, err := c.dcli.ContainerCreate(ctx, &container.Config{
AttachStdin: tty,
AttachStdout: tty,
AttachStderr: tty,
Tty: tty,
OpenStdin: tty,
Image: buccImage,
Entrypoint: entrypoint,
}, &container.HostConfig{
AutoRemove: true,
Mounts: []mount.Mount{
{
Type: mount.TypeBind,
Source: buccHostStateDir,
Target: buccContainerStateDir,
Consistency: mount.ConsistencyFull,
ReadOnly: false,
},
{
Type: mount.TypeBind,
Source: dockerSocket,
Target: dockerSocket,
Consistency: mount.ConsistencyFull,
ReadOnly: false,
},
},
}, &network.NetworkingConfig{
EndpointsConfig: networks,
}, "")
if err != nil {
return fmt.Errorf("failed create docker container: %s", err)
}
if err := c.dcli.ContainerStart(ctx, resp.ID, types.ContainerStartOptions{}); err != nil {
return fmt.Errorf("failed start docker container: %s", err)
}
if tty {
// statusCh, errCh := c.dcli.ContainerWait(ctx, resp.ID, container.WaitConditionNotRunning)
// resp, err := c.dcli.ContainerAttach(ctx, resp.ID, types.ContainerAttachOptions{
// Stdin: true,
// Stdout: true,
// // Stderr: true,
// // Stream: true,
// })
// if err != nil {
// return fmt.Errorf("failed attach to docker container: %s", err)
// }
// defer resp.Close()
// select {
// case err := <-errCh:
// if err != nil {
// return fmt.Errorf("failed start docker container: %s", err)
// }
// case status := <-statusCh:
// if status.StatusCode != 0 {
// return fmt.Errorf("container process failed: %s", status.Error.Message)
// }
// }
// stdcopy.StdCopy(os.Stdout, os.Stderr, session.Reader)
cmd := exec.Command("docker", "attach", resp.ID)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
err := cmd.Run()
if err != nil {
return err
}
} else {
statusCh, errCh := c.dcli.ContainerWait(ctx, resp.ID, container.WaitConditionNotRunning)
ctx, cancel := context.WithCancel(ctx)
go func() {
out, err := c.dcli.ContainerLogs(ctx, resp.ID, types.ContainerLogsOptions{
ShowStdout: true, ShowStderr: true, Follow: true})
if err != nil {
c.logger.Printf("[warning] Failed to tail docker container logs: %s", err)
}
stdcopy.StdCopy(os.Stdout, os.Stderr, out)
}()
select {
case err := <-errCh:
if err != nil {
cancel()
return fmt.Errorf("failed start docker container: %s", err)
}
case status := <-statusCh:
cancel()
if status.StatusCode != 0 {
return fmt.Errorf("container process failed: %s", status.Error)
}
}
}
return nil
}