7 "git.curoverse.com/arvados.git/sdk/go/streamer"
17 type keepServices struct {
18 Uuid string `json:"uuid"`
19 Hostname string `json:"service_host"`
20 Port int `json:"service_port"`
21 SSL bool `json:"service_ssl_flag"`
22 SvcType string `json:"service_type"`
23 ReadOnly bool `json:"read_only"`
26 // Md5String returns md5 hash for the bytes in the given string
27 func Md5String(s string) string {
28 return fmt.Sprintf("%x", md5.Sum([]byte(s)))
31 // Set timeouts apply when connecting to keepproxy services (assumed to be over
33 func (this *KeepClient) setClientSettingsProxy() {
34 if this.Client.Timeout == 0 {
35 // Maximum time to wait for a complete response
36 this.Client.Timeout = 300 * time.Second
38 // TCP and TLS connection settings
39 this.Client.Transport = &http.Transport{
41 // The maximum time to wait to set up
42 // the initial TCP connection.
43 Timeout: 30 * time.Second,
45 // The TCP keep alive heartbeat
47 KeepAlive: 120 * time.Second,
50 TLSHandshakeTimeout: 10 * time.Second,
55 // Set timeouts apply when connecting to keepstore services directly (assumed
56 // to be on the local network).
57 func (this *KeepClient) setClientSettingsDisk() {
58 if this.Client.Timeout == 0 {
59 // Maximum time to wait for a complete response
60 this.Client.Timeout = 20 * time.Second
62 // TCP and TLS connection timeouts
63 this.Client.Transport = &http.Transport{
65 // The maximum time to wait to set up
66 // the initial TCP connection.
67 Timeout: 2 * time.Second,
69 // The TCP keep alive heartbeat
71 KeepAlive: 180 * time.Second,
74 TLSHandshakeTimeout: 4 * time.Second,
79 // DiscoverKeepServers gets list of available keep services from api server
80 func (this *KeepClient) DiscoverKeepServers() error {
82 Items []keepServices `json:"items"`
86 // Get keep services from api server
87 err := this.Arvados.Call("GET", "keep_services", "", "accessible", nil, &m)
89 // If there is error getting keep services, get list of keep disks
91 if err := this.Arvados.List("keep_disks", nil, &m); err != nil {
96 listed := make(map[string]bool)
97 localRoots := make(map[string]string)
98 gatewayRoots := make(map[string]string)
99 writableLocalRoots := make(map[string]string)
101 for _, service := range m.Items {
106 url := fmt.Sprintf("%s://%s:%d", scheme, service.Hostname, service.Port)
114 switch service.SvcType {
116 localRoots[service.Uuid] = url
118 localRoots[service.Uuid] = url
119 this.Using_proxy = true
122 if service.ReadOnly == false {
123 writableLocalRoots[service.Uuid] = url
126 // Gateway services are only used when specified by
127 // UUID, so there's nothing to gain by filtering them
128 // by service type. Including all accessible services
129 // (gateway and otherwise) merely accommodates more
130 // service configurations.
131 gatewayRoots[service.Uuid] = url
134 if this.Using_proxy {
135 this.setClientSettingsProxy()
137 this.setClientSettingsDisk()
140 this.SetServiceRoots(localRoots, writableLocalRoots, gatewayRoots)
144 type uploadStatus struct {
152 func (this KeepClient) uploadToKeepServer(host string, hash string, body io.ReadCloser,
153 upload_status chan<- uploadStatus, expectedLength int64, requestId string) {
155 var req *http.Request
157 var url = fmt.Sprintf("%s/%s", host, hash)
158 if req, err = http.NewRequest("PUT", url, nil); err != nil {
159 log.Printf("[%v] Error creating request PUT %v error: %v", requestId, url, err.Error())
160 upload_status <- uploadStatus{err, url, 0, 0, ""}
165 req.ContentLength = expectedLength
166 if expectedLength > 0 {
167 // http.Client.Do will close the body ReadCloser when it is
171 // "For client requests, a value of 0 means unknown if Body is
172 // not nil." In this case we do want the body to be empty, so
173 // don't set req.Body. However, we still need to close the
178 req.Header.Add("Authorization", fmt.Sprintf("OAuth2 %s", this.Arvados.ApiToken))
179 req.Header.Add("Content-Type", "application/octet-stream")
181 if this.Using_proxy {
182 req.Header.Add(X_Keep_Desired_Replicas, fmt.Sprint(this.Want_replicas))
185 var resp *http.Response
186 if resp, err = this.Client.Do(req); err != nil {
187 log.Printf("[%v] Upload failed %v error: %v", requestId, url, err.Error())
188 upload_status <- uploadStatus{err, url, 0, 0, ""}
193 if xr := resp.Header.Get(X_Keep_Replicas_Stored); xr != "" {
194 fmt.Sscanf(xr, "%d", &rep)
197 defer resp.Body.Close()
198 defer io.Copy(ioutil.Discard, resp.Body)
200 respbody, err2 := ioutil.ReadAll(&io.LimitedReader{resp.Body, 4096})
201 response := strings.TrimSpace(string(respbody))
202 if err2 != nil && err2 != io.EOF {
203 log.Printf("[%v] Upload %v error: %v response: %v", requestId, url, err2.Error(), response)
204 upload_status <- uploadStatus{err2, url, resp.StatusCode, rep, response}
205 } else if resp.StatusCode == http.StatusOK {
206 log.Printf("[%v] Upload %v success", requestId, url)
207 upload_status <- uploadStatus{nil, url, resp.StatusCode, rep, response}
209 log.Printf("[%v] Upload %v error: %v response: %v", requestId, url, resp.StatusCode, response)
210 upload_status <- uploadStatus{errors.New(resp.Status), url, resp.StatusCode, rep, response}
214 func (this KeepClient) putReplicas(
216 tr *streamer.AsyncStream,
217 expectedLength int64) (locator string, replicas int, err error) {
219 // Take the hash of locator and timestamp in order to identify this
220 // specific transaction in log statements.
221 requestId := fmt.Sprintf("%x", md5.Sum([]byte(locator+time.Now().String())))[0:8]
223 // Calculate the ordering for uploading to servers
224 sv := NewRootSorter(this.WritableLocalRoots(), hash).GetSortedRoots()
226 // The next server to try contacting
229 // The number of active writers
232 // Used to communicate status from the upload goroutines
233 upload_status := make(chan uploadStatus)
234 defer close(upload_status)
236 // Desired number of replicas
237 remaining_replicas := this.Want_replicas
239 for remaining_replicas > 0 {
240 for active < remaining_replicas {
241 // Start some upload requests
242 if next_server < len(sv) {
243 log.Printf("[%v] Begin upload %s to %s", requestId, hash, sv[next_server])
244 go this.uploadToKeepServer(sv[next_server], hash, tr.MakeStreamReader(), upload_status, expectedLength, requestId)
249 return locator, (this.Want_replicas - remaining_replicas), InsufficientReplicasError
255 log.Printf("[%v] Replicas remaining to write: %v active uploads: %v",
256 requestId, remaining_replicas, active)
258 // Now wait for something to happen.
259 status := <-upload_status
262 if status.statusCode == 200 {
264 remaining_replicas -= status.replicas_stored
265 locator = status.response
269 return locator, this.Want_replicas, nil