-
-
Notifications
You must be signed in to change notification settings - Fork 4
/
compose.go
338 lines (292 loc) · 8.94 KB
/
compose.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
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
package compose
import (
"context"
"errors"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strconv"
"strings"
"github.com/compose-spec/compose-go/loader"
"github.com/compose-spec/compose-go/types"
dockerTypes "github.com/docker/docker/api/types"
"github.com/docker/docker/api/types/filters"
"github.com/docker/docker/client"
"github.com/reddec/git-pipe/core"
"github.com/reddec/git-pipe/internal"
"github.com/reddec/git-pipe/packs"
"gopkg.in/yaml.v2"
)
func Run(ctx context.Context, env *core.Environment) error {
rootDir, err := filepath.Abs(env.Directory)
if err != nil {
return fmt.Errorf("detect root path of workdir: %w", err)
}
at := internal.At(env.Directory)
// Read environment file if possible
environ, err := internal.ReadEnvFile(filepath.Join(rootDir, ".env"))
if err != nil && !errors.Is(err, os.ErrNotExist) {
return fmt.Errorf("read env file: %w", err)
}
// Merge environment, where env from core has higher priority
merged := make(map[string]string)
for k, v := range environ {
merged[k] = v
}
for k, v := range env.Vars {
merged[k] = v
}
env.Vars = merged
// Read first compose file
fileName, content, err := readComposeFile(env.Directory, "docker-compose.yaml", "docker-compose.yml")
if err != nil {
return fmt.Errorf("read compose file: %w", err)
}
// Parse config
project, err := loader.Load(types.ConfigDetails{
Environment: env.Vars,
ConfigFiles: []types.ConfigFile{{
Filename: fileName,
Content: content,
}},
})
if err != nil {
return fmt.Errorf("load compose config: %w", err)
}
// Lazy clone project
modified, err := loader.Load(types.ConfigDetails{
Environment: env.Vars,
ConfigFiles: []types.ConfigFile{{
Filename: fileName,
Content: content,
}},
})
if err != nil {
return fmt.Errorf("load compose config (2): %w", err)
}
// Get volumes and apply workarounds
var volumes []string
for name, volume := range modified.Volumes {
if !volume.External.External && (volume.Driver == "" || volume.Driver == "local") {
if strings.HasPrefix(volume.Name, "_") {
// Workaround to provide valid volume name
volume.Name = env.Name + volume.Name
modified.Volumes[name] = volume
}
volumes = append(volumes, volume.Name)
}
}
// Apply service bind workaround
for name, service := range modified.Services {
for i, volume := range service.Volumes {
if volume.Type == types.VolumeTypeBind {
if volume.Bind != nil {
// remove unsupported features
volume.Bind.CreateHostPath = false
}
if !filepath.IsAbs(volume.Source) {
volume.Source = filepath.Join(rootDir, volume.Source)
}
}
service.Volumes[i] = volume
}
modified.Services[name] = service
}
// Remove published ports
for i, srv := range modified.Services {
srv.Ports = nil
modified.Services[i] = srv
}
// Serialize updated config
composeContent, err := yaml.Marshal(modified)
if err != nil {
return fmt.Errorf("marshall compose config: %w", err)
}
// Recover volumes (if applicable)
err = env.Backup.Restore(ctx, env.Name, volumes)
if err != nil {
return fmt.Errorf("restore: %w", err)
}
// Schedule backup
backupTask := env.Backup.Schedule(ctx, env.Name, volumes)
defer backupTask.Stop()
// Build
err = at.Do(ctx, "docker-compose", "-f", "-", "-p", env.Name, "build", "--pull", "--force-rm").Env(env.Vars).Input(composeContent).Exec()
if err != nil {
return fmt.Errorf("build image: %w", err)
}
// Bring up
err = at.Do(ctx, "docker-compose", "-f", "-", "-p", env.Name, "up", "-d", "--remove-orphans").Env(env.Vars).Input(composeContent).Exec()
if err != nil {
return fmt.Errorf("bring up: %w", err)
}
// Tear down automatically
defer at.Do(context.Background(), "docker-compose", "-f", "-", "-p", env.Name, "stop").Env(env.Vars).Input(composeContent).Exec()
// Get deployed containers
containers, err := mapContainers(ctx, env.Docker, env.Name, project.Services)
if err != nil {
return fmt.Errorf("get deplyed containers: %w", err)
}
// Collect exposed domains
var firstDomainByService = make(map[string]string) // service -> domain
var exposedLinks = make(map[string][]string) // domains -> addresses
for _, serviceContainers := range containers {
var ports []types.ServicePortConfig
for _, port := range serviceContainers.Service.Ports {
// Filter only tcp or empty protocol
if port.Protocol != "tcp" && port.Protocol != "" {
continue
}
ports = append(ports, port)
}
// Filter only exposed
if len(ports) == 0 {
continue
}
// Attach all containers in the service to our network
var links []string
for _, container := range serviceContainers.Containers {
address, err := env.Network.Join(ctx, container.ID)
if err != nil {
return fmt.Errorf("join container: %w", err)
}
links = append(links, address)
// Automatically detach container from network
defer env.Network.Leave(ctx, container.ID)
}
// Allocate domains
domain := domainName(env.Name, any(serviceContainers.Service.DomainName, serviceContainers.Service.Name))
domainsByPort := make(map[int]string)
for i, port := range ports {
serviceDomain := domainName(domain, strconv.FormatUint(uint64(port.Target), 10)) //nolint:gomnd
exposedLinks[serviceDomain] = mapLinks(links, port.Target)
if i == 0 {
firstDomainByService[serviceContainers.Service.Name] = serviceDomain
}
domainsByPort[int(port.Target)] = serviceDomain
}
// Try pick root domain for service by ports priority
for _, port := range packs.PortsPriority() {
if serviceDomain, ok := domainsByPort[port]; ok {
exposedLinks[domain] = exposedLinks[serviceDomain]
break
}
}
// Pick first port as root domain in case ports priority didn't work
if _, picked := exposedLinks[domain]; !picked {
exposedLinks[domain] = exposedLinks[domainsByPort[int(ports[0].Target)]]
}
// Check that service marked as root
if isRoot, ok := serviceContainers.Service.Extensions["x-root"].(bool); ok && isRoot {
exposedLinks[env.Name] = mapLinks(links, ports[0].Target)
}
}
// Pick root domain by name if not yet picked
suggestedRootDomain := selectRootDomain(firstDomainByService)
if _, picked := exposedLinks[env.Name]; !picked && suggestedRootDomain != "" {
exposedLinks[env.Name] = exposedLinks[suggestedRootDomain]
}
// Register containers in ingress
err = env.Ingress.Set(ctx, env.Name, exposedLinks)
if err != nil {
return fmt.Errorf("set ingress: %w", err)
}
defer env.Ingress.Clear(context.Background(), env.Name)
// Register in DNS
var domains = make([]string, 0, len(exposedLinks))
for domain := range exposedLinks {
domains = append(domains, domain)
}
err = env.DNS.Register(ctx, domains)
if err != nil {
return fmt.Errorf("register DNS records: %w", err)
}
// Notify that system is up
env.Event.Ready()
// Wait till the end
<-ctx.Done()
return nil
}
type serviceContainers struct {
Service types.ServiceConfig
Containers []dockerTypes.Container
}
func mapLinks(links []string, port uint32) []string {
var list = make([]string, 0, len(links))
containerPort := strconv.FormatUint(uint64(port), 10) //nolint:gomnd
for _, link := range links {
list = append(list, link+":"+containerPort)
}
return list
}
func mapContainers(ctx context.Context, cli client.APIClient, project string, services []types.ServiceConfig) (map[string]*serviceContainers, error) {
const (
labelProject = "com.docker.compose.project"
labelName = "com.docker.compose.service"
)
filter := filters.NewArgs(filters.Arg("label", labelProject+"="+project))
list, err := cli.ContainerList(ctx, dockerTypes.ContainerListOptions{
Filters: filter,
})
if err != nil {
return nil, fmt.Errorf("list containers: %w", err)
}
var servicesByName = make(map[string]types.ServiceConfig)
for _, srv := range services {
servicesByName[srv.Name] = srv
}
var result = make(map[string]*serviceContainers)
// Map containers (could be multiple) to the service
for _, container := range list {
serviceName := container.Labels[labelName]
info, known := servicesByName[serviceName]
if !known {
continue
}
srv, ok := result[serviceName]
if !ok {
srv = &serviceContainers{
Service: info,
}
result[serviceName] = srv
}
srv.Containers = append(srv.Containers, container)
}
return result, nil
}
func selectRootDomain(domainByService map[string]string) string {
for _, name := range packs.NamePriority() {
domain, ok := domainByService[name]
if ok {
return domain
}
}
return ""
}
func any(options ...string) string {
for _, opt := range options {
if opt != "" {
return opt
}
}
return ""
}
func domainName(root string, name string) string {
if name != "" {
return name + "." + root
}
return root
}
func readComposeFile(dir string, names ...string) (string, []byte, error) {
for _, name := range names {
data, err := ioutil.ReadFile(filepath.Join(dir, name))
if err == nil {
return name, data, nil
}
if !errors.Is(err, os.ErrNotExist) {
return "", nil, fmt.Errorf("read compose file: %w", err)
}
}
return "", nil, os.ErrNotExist
}