Merge branch 'master' into 7167-keep-rsync-test-setup

[arvados.git] / sdk / go / keepclient / support.go

diff --git a/sdk/go/keepclient/support.go b/sdk/go/keepclient/support.go
index b467d06b21ed91ecaa06b1537ae30a6cddcb6ce2..8fabb308f7be306ea4de494d2698666a20061022 100644 (file)
--- a/sdk/go/keepclient/support.go
+++ b/sdk/go/keepclient/support.go
@@ -2,6 +2,7 @@ package keepclient
 
 import (
        "crypto/md5"
+       "encoding/json"
        "errors"
        "fmt"
        "git.curoverse.com/arvados.git/sdk/go/streamer"
@@ -14,7 +15,7 @@ import (
        "time"
 )
 
-type keepDisk struct {
+type keepService struct {
        Uuid     string `json:"uuid"`
        Hostname string `json:"service_host"`
        Port     int    `json:"service_port"`
@@ -23,6 +24,7 @@ type keepDisk struct {
        ReadOnly bool   `json:"read_only"`
 }
 
+// Md5String returns md5 hash for the bytes in the given string
 func Md5String(s string) string {
        return fmt.Sprintf("%x", md5.Sum([]byte(s)))
 }
@@ -49,12 +51,11 @@ func (this *KeepClient) setClientSettingsProxy() {
                        TLSHandshakeTimeout: 10 * time.Second,
                }
        }
-
 }
 
 // Set timeouts apply when connecting to keepstore services directly (assumed
 // to be on the local network).
-func (this *KeepClient) setClientSettingsStore() {
+func (this *KeepClient) setClientSettingsDisk() {
        if this.Client.Timeout == 0 {
                // Maximum time to wait for a complete response
                this.Client.Timeout = 20 * time.Second
@@ -76,26 +77,48 @@ func (this *KeepClient) setClientSettingsStore() {
        }
 }
 
+type svcList struct {
+       Items []keepService `json:"items"`
+}
+
+// DiscoverKeepServers gets list of available keep services from api server
 func (this *KeepClient) DiscoverKeepServers() error {
-       type svcList struct {
-               Items []keepDisk `json:"items"`
+       var list svcList
+
+       // Get keep services from api server
+       err := this.Arvados.Call("GET", "keep_services", "", "accessible", nil, &list)
+       if err != nil {
+               return err
        }
-       var m svcList
 
-       err := this.Arvados.Call("GET", "keep_services", "", "accessible", nil, &m)
+       return this.loadKeepServers(list)
+}
 
-       if err != nil {
-               if err := this.Arvados.List("keep_disks", nil, &m); err != nil {
-                       return err
-               }
+// DiscoverKeepServersFromJSON gets list of available keep services from given JSON
+func (this *KeepClient) DiscoverKeepServersFromJSON(services string) error {
+       var list svcList
+
+       // Load keep services from given json
+       dec := json.NewDecoder(strings.NewReader(services))
+       if err := dec.Decode(&list); err != nil {
+               return err
        }
 
+       return this.loadKeepServers(list)
+}
+
+// loadKeepServers
+func (this *KeepClient) loadKeepServers(list svcList) error {
        listed := make(map[string]bool)
        localRoots := make(map[string]string)
        gatewayRoots := make(map[string]string)
        writableLocalRoots := make(map[string]string)
 
-       for _, service := range m.Items {
+       // replicasPerService is 1 for disks; unknown or unlimited otherwise
+       this.replicasPerService = 1
+       this.Using_proxy = false
+
+       for _, service := range list.Items {
                scheme := "http"
                if service.SSL {
                        scheme = "https"
@@ -108,16 +131,16 @@ func (this *KeepClient) DiscoverKeepServers() error {
                }
                listed[url] = true
 
-               switch service.SvcType {
-               case "disk":
-                       localRoots[service.Uuid] = url
-               case "proxy":
-                       localRoots[service.Uuid] = url
+               localRoots[service.Uuid] = url
+               if service.SvcType == "proxy" {
                        this.Using_proxy = true
                }
 
                if service.ReadOnly == false {
                        writableLocalRoots[service.Uuid] = url
+                       if service.SvcType != "disk" {
+                               this.replicasPerService = 0
+                       }
                }
 
                // Gateway services are only used when specified by
@@ -131,7 +154,7 @@ func (this *KeepClient) DiscoverKeepServers() error {
        if this.Using_proxy {
                this.setClientSettingsProxy()
        } else {
-               this.setClientSettingsStore()
+               this.setClientSettingsDisk()
        }
 
        this.SetServiceRoots(localRoots, writableLocalRoots, gatewayRoots)
@@ -174,10 +197,7 @@ func (this KeepClient) uploadToKeepServer(host string, hash string, body io.Read
 
        req.Header.Add("Authorization", fmt.Sprintf("OAuth2 %s", this.Arvados.ApiToken))
        req.Header.Add("Content-Type", "application/octet-stream")
-
-       if this.Using_proxy {
-               req.Header.Add(X_Keep_Desired_Replicas, fmt.Sprint(this.Want_replicas))
-       }
+       req.Header.Add(X_Keep_Desired_Replicas, fmt.Sprint(this.Want_replicas))
 
        var resp *http.Response
        if resp, err = this.Client.Do(req); err != nil {
@@ -228,13 +248,29 @@ func (this KeepClient) putReplicas(
 
        // Used to communicate status from the upload goroutines
        upload_status := make(chan uploadStatus)
-       defer close(upload_status)
+       defer func() {
+               // Wait for any abandoned uploads (e.g., we started
+               // two uploads and the first replied with replicas=2)
+               // to finish before closing the status channel.
+               go func() {
+                       for active > 0 {
+                               <-upload_status
+                       }
+                       close(upload_status)
+               }()
+       }()
 
        // Desired number of replicas
        remaining_replicas := this.Want_replicas
 
+       replicasPerThread := this.replicasPerService
+       if replicasPerThread < 1 {
+               // unlimited or unknown
+               replicasPerThread = remaining_replicas
+       }
+
        for remaining_replicas > 0 {
-               for active < remaining_replicas {
+               for active*replicasPerThread < remaining_replicas {
                        // Start some upload requests
                        if next_server < len(sv) {
                                log.Printf("[%v] Begin upload %s to %s", requestId, hash, sv[next_server])