forked from goharbor/harbor
-
Notifications
You must be signed in to change notification settings - Fork 0
/
repo_handler.go
270 lines (228 loc) · 6.62 KB
/
repo_handler.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
package chartserver
import (
"encoding/json"
"errors"
"fmt"
"net/http"
"net/url"
"path"
"sync"
"sync/atomic"
"time"
"github.com/ghodss/yaml"
"github.com/vmware/harbor/src/ui/filter"
helm_repo "k8s.io/helm/pkg/repo"
hlog "github.com/vmware/harbor/src/common/utils/log"
)
const (
maxWorkers = 10
)
//RepositoryHandler defines all the handlers to handle the requests related with chart repository
//e.g: index.yaml and downloading chart objects
type RepositoryHandler struct {
//Proxy used to to transfer the traffic of requests
//It's mainly used to talk to the backend chart server
trafficProxy *ProxyEngine
//HTTP client used to call the realted APIs of the backend chart repositories
apiClient *ChartClient
//Point to the url of the backend server
backendServerAddress *url.URL
}
//Pass work to the workers
//'index' is the location of processing namespace/project in the list
type workload struct {
index uint32
}
//Result returned by worker
type processedResult struct {
namespace string
indexFileOfRepo *helm_repo.IndexFile
}
//GetIndexFileWithNS will read the index.yaml data under the specified namespace
func (rh *RepositoryHandler) GetIndexFileWithNS(w http.ResponseWriter, req *http.Request) {
rh.trafficProxy.ServeHTTP(w, req)
}
//GetIndexFile will read the index.yaml under all namespaces and merge them as a single one
//Please be aware that, to support this function, the backend chart repository server should
//enable multi-tenancies
func (rh *RepositoryHandler) GetIndexFile(w http.ResponseWriter, req *http.Request) {
//Get project manager references
projectMgr, err := filter.GetProjectManager(req)
if err != nil {
WriteInternalError(w, err)
return
}
//Get all the projects
results, err := projectMgr.List(nil)
if err != nil {
WriteInternalError(w, err)
return
}
//If no projects existing, return empty index.yaml content immediately
if results.Total == 0 {
w.Write(emptyIndexFile())
return
}
//The final merged index file
mergedIndexFile := &helm_repo.IndexFile{
APIVersion: "v1",
Entries: make(map[string]helm_repo.ChartVersions),
Generated: time.Now(),
PublicKeys: []string{},
}
//Retrieve index.yaml for repositories
workerPool := make(chan *workload, maxWorkers)
//Sync the output results from the retriever
resultChan := make(chan *processedResult, 1)
//Receive error
errorChan := make(chan error, 1)
//Signal chan for merging work
mergeDone := make(chan struct{}, 1)
//Total projects/namespaces
total := uint32(results.Total)
//Track all the background threads
waitGroup := new(sync.WaitGroup)
//Initialize
initialItemCount := maxWorkers
if total < maxWorkers {
initialItemCount = int(total)
}
for i := 0; i < initialItemCount; i++ {
workerPool <- &workload{uint32(i)}
}
//Atomtic index
var indexRef uint32
atomic.AddUint32(&indexRef, uint32(initialItemCount-1))
//Start the index files merging thread
go func() {
defer func() {
mergeDone <- struct{}{}
}()
for res := range resultChan {
rh.mergeIndexFile(res.namespace, mergedIndexFile, res.indexFileOfRepo)
}
}()
//Retrieve the index files for the repositories
//and blocking here
LOOP:
for {
select {
case work := <-workerPool:
if work.index >= total {
break LOOP
}
//Process
//New one
waitGroup.Add(1)
namespace := results.Projects[work.index].Name
go func(ns string) {
//Return the worker back to the pool
defer func() {
waitGroup.Done() //done
//Put one. The invalid index will be treated as a signal to quit loop
nextOne := atomic.AddUint32(&indexRef, 1)
workerPool <- &workload{nextOne}
}()
indexFile, err := rh.getIndexYamlWithNS(ns)
if err != nil {
errorChan <- err
return
}
//Output
resultChan <- &processedResult{
namespace: ns,
indexFileOfRepo: indexFile,
}
}(namespace)
case err = <-errorChan:
//Quit earlier
break LOOP
case <-req.Context().Done():
//Quit earlier
err = errors.New("request of getting index yaml file is aborted")
break LOOP
}
}
//Hold util all the retrieving work are done
waitGroup.Wait()
//close consumer channel
close(resultChan)
//Wait until merging thread quit
<-mergeDone
//All the threads are done
//Met an error
if err != nil {
WriteInternalError(w, err)
return
}
//Remove duplicated keys in public key list
hash := make(map[string]string)
for _, key := range mergedIndexFile.PublicKeys {
hash[key] = key
}
mergedIndexFile.PublicKeys = []string{}
for k := range hash {
mergedIndexFile.PublicKeys = append(mergedIndexFile.PublicKeys, k)
}
bytes, err := yaml.Marshal(mergedIndexFile)
if err != nil {
WriteInternalError(w, err)
return
}
w.Write(bytes)
}
//DownloadChartObject will download the stored chart object to the client
//e.g: helm install
func (rh *RepositoryHandler) DownloadChartObject(w http.ResponseWriter, req *http.Request) {
rh.trafficProxy.ServeHTTP(w, req)
}
//Get the index yaml file under the specified namespace from the backend server
func (rh *RepositoryHandler) getIndexYamlWithNS(namespace string) (*helm_repo.IndexFile, error) {
//Join url path
url := path.Join(namespace, "index.yaml")
url = fmt.Sprintf("%s/%s", rh.backendServerAddress.String(), url)
hlog.Debugf("Getting index.yaml from '%s'", url)
content, err := rh.apiClient.GetContent(url)
if err != nil {
return nil, err
}
//Traverse to index file object for merging
indexFile := helm_repo.NewIndexFile()
if err := yaml.Unmarshal(content, indexFile); err != nil {
return nil, err
}
return indexFile, nil
}
//Merge the content of mergingIndexFile to the baseIndex
//The chart url should be without --chart-url prefix
func (rh *RepositoryHandler) mergeIndexFile(namespace string,
baseIndex *helm_repo.IndexFile,
mergingIndexFile *helm_repo.IndexFile) {
//Append entries
for chartName, chartVersions := range mergingIndexFile.Entries {
nameWithNS := fmt.Sprintf("%s/%s", namespace, chartName)
for _, version := range chartVersions {
version.Name = nameWithNS
//Currently there is only one url
for index, url := range version.URLs {
version.URLs[index] = path.Join(namespace, url)
}
}
//Appended
baseIndex.Entries[nameWithNS] = chartVersions
}
//Update generated time
if mergingIndexFile.Generated.After(baseIndex.Generated) {
baseIndex.Generated = mergingIndexFile.Generated
}
//Merge public keys
baseIndex.PublicKeys = append(baseIndex.PublicKeys, mergingIndexFile.PublicKeys...)
}
//Generate empty index file
func emptyIndexFile() []byte {
emptyIndexFile := &helm_repo.IndexFile{}
emptyIndexFile.Generated = time.Now()
//Ignore the error
rawData, _ := json.Marshal(emptyIndexFile)
return rawData
}