-/* Internal methods to support keepclient.go */
package keepclient
import (
"crypto/md5"
+ "encoding/json"
"errors"
"fmt"
"git.curoverse.com/arvados.git/sdk/go/streamer"
"io"
"io/ioutil"
"log"
+ "net"
"net/http"
- "os"
"strings"
"time"
)
-type keepDisk struct {
+type keepService struct {
Uuid string `json:"uuid"`
Hostname string `json:"service_host"`
Port int `json:"service_port"`
SSL bool `json:"service_ssl_flag"`
SvcType string `json:"service_type"`
+ 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)))
}
-func (this *KeepClient) DiscoverKeepServers() error {
- if prx := os.Getenv("ARVADOS_KEEP_PROXY"); prx != "" {
- sr := map[string]string{"proxy": prx}
- this.SetServiceRoots(sr)
- this.Using_proxy = true
- return nil
+// Set timeouts apply when connecting to keepproxy services (assumed to be over
+// the Internet).
+func (this *KeepClient) setClientSettingsProxy() {
+ if this.Client.Timeout == 0 {
+ // Maximum time to wait for a complete response
+ this.Client.Timeout = 300 * time.Second
+
+ // TCP and TLS connection settings
+ this.Client.Transport = &http.Transport{
+ Dial: (&net.Dialer{
+ // The maximum time to wait to set up
+ // the initial TCP connection.
+ Timeout: 30 * time.Second,
+
+ // The TCP keep alive heartbeat
+ // interval.
+ KeepAlive: 120 * time.Second,
+ }).Dial,
+
+ TLSHandshakeTimeout: 10 * time.Second,
+ }
}
+}
- type svcList struct {
- Items []keepDisk `json:"items"`
+// Set timeouts apply when connecting to keepstore services directly (assumed
+// to be on the local network).
+func (this *KeepClient) setClientSettingsDisk() {
+ if this.Client.Timeout == 0 {
+ // Maximum time to wait for a complete response
+ this.Client.Timeout = 20 * time.Second
+
+ // TCP and TLS connection timeouts
+ this.Client.Transport = &http.Transport{
+ Dial: (&net.Dialer{
+ // The maximum time to wait to set up
+ // the initial TCP connection.
+ Timeout: 2 * time.Second,
+
+ // The TCP keep alive heartbeat
+ // interval.
+ KeepAlive: 180 * time.Second,
+ }).Dial,
+
+ TLSHandshakeTimeout: 4 * time.Second,
+ }
}
- var m svcList
+}
- err := this.Arvados.Call("GET", "keep_services", "", "accessible", nil, &m)
+type svcList struct {
+ Items []keepService `json:"items"`
+}
+// DiscoverKeepServers gets list of available keep services from api server
+func (this *KeepClient) DiscoverKeepServers() error {
+ var list svcList
+
+ // Get keep services from api server
+ err := this.Arvados.Call("GET", "keep_services", "", "accessible", nil, &list)
if err != nil {
- if err := this.Arvados.List("keep_disks", nil, &m); err != nil {
- return err
- }
+ return err
}
- listed := make(map[string]bool)
- service_roots := make(map[string]string)
+ return this.loadKeepServers(list)
+}
- for _, element := range m.Items {
- n := ""
+// DiscoverKeepServersFromJSON gets list of available keep services from given JSON
+func (this *KeepClient) DiscoverKeepServersFromJSON(services string) error {
+ var list svcList
- if element.SSL {
- n = "s"
- }
+ // 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)
+}
- // Construct server URL
- url := fmt.Sprintf("http%s://%s:%d", n, element.Hostname, element.Port)
+// 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)
+
+ // 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"
+ }
+ url := fmt.Sprintf("%s://%s:%d", scheme, service.Hostname, service.Port)
// Skip duplicates
- if !listed[url] {
- listed[url] = true
- service_roots[element.Uuid] = url
+ if listed[url] {
+ continue
}
- if element.SvcType == "proxy" {
+ listed[url] = true
+
+ 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
+ // UUID, so there's nothing to gain by filtering them
+ // by service type. Including all accessible services
+ // (gateway and otherwise) merely accommodates more
+ // service configurations.
+ gatewayRoots[service.Uuid] = url
}
- this.SetServiceRoots(service_roots)
+ if this.Using_proxy {
+ this.setClientSettingsProxy()
+ } else {
+ this.setClientSettingsDisk()
+ }
+ this.SetServiceRoots(localRoots, writableLocalRoots, gatewayRoots)
return nil
}
}
func (this KeepClient) uploadToKeepServer(host string, hash string, body io.ReadCloser,
- upload_status chan<- uploadStatus, expectedLength int64, tag string) {
-
- log.Printf("[%v] Begin upload %s to %s", tag, hash, host)
+ upload_status chan<- uploadStatus, expectedLength int64, requestId string) {
var req *http.Request
var err error
var url = fmt.Sprintf("%s/%s", host, hash)
if req, err = http.NewRequest("PUT", url, nil); err != nil {
+ log.Printf("[%v] Error creating request PUT %v error: %v", requestId, url, err.Error())
upload_status <- uploadStatus{err, url, 0, 0, ""}
body.Close()
return
}
+ req.ContentLength = expectedLength
if expectedLength > 0 {
- req.ContentLength = expectedLength
+ // http.Client.Do will close the body ReadCloser when it is
+ // done with it.
+ req.Body = body
+ } else {
+ // "For client requests, a value of 0 means unknown if Body is
+ // not nil." In this case we do want the body to be empty, so
+ // don't set req.Body. However, we still need to close the
+ // body ReadCloser.
+ body.Close()
}
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.Body = body
+ 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 {
+ log.Printf("[%v] Upload failed %v error: %v", requestId, url, err.Error())
upload_status <- uploadStatus{err, url, 0, 0, ""}
- body.Close()
return
}
defer io.Copy(ioutil.Discard, resp.Body)
respbody, err2 := ioutil.ReadAll(&io.LimitedReader{resp.Body, 4096})
+ response := strings.TrimSpace(string(respbody))
if err2 != nil && err2 != io.EOF {
- upload_status <- uploadStatus{err2, url, resp.StatusCode, rep, string(respbody)}
- return
- }
-
- locator := strings.TrimSpace(string(respbody))
-
- if resp.StatusCode == http.StatusOK {
- upload_status <- uploadStatus{nil, url, resp.StatusCode, rep, locator}
+ log.Printf("[%v] Upload %v error: %v response: %v", requestId, url, err2.Error(), response)
+ upload_status <- uploadStatus{err2, url, resp.StatusCode, rep, response}
+ } else if resp.StatusCode == http.StatusOK {
+ log.Printf("[%v] Upload %v success", requestId, url)
+ upload_status <- uploadStatus{nil, url, resp.StatusCode, rep, response}
} else {
- upload_status <- uploadStatus{errors.New(resp.Status), url, resp.StatusCode, rep, string(respbody)}
+ log.Printf("[%v] Upload %v error: %v response: %v", requestId, url, resp.StatusCode, response)
+ upload_status <- uploadStatus{errors.New(resp.Status), url, resp.StatusCode, rep, response}
}
}
// Take the hash of locator and timestamp in order to identify this
// specific transaction in log statements.
- tag := fmt.Sprintf("%x", md5.Sum([]byte(locator+time.Now().String())))[0:8]
+ requestId := fmt.Sprintf("%x", md5.Sum([]byte(locator+time.Now().String())))[0:8]
// Calculate the ordering for uploading to servers
- sv := NewRootSorter(this.ServiceRoots(), hash).GetSortedRoots()
+ sv := NewRootSorter(this.WritableLocalRoots(), hash).GetSortedRoots()
// The next server to try contacting
next_server := 0
// 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) {
- go this.uploadToKeepServer(sv[next_server], hash, tr.MakeStreamReader(), upload_status, expectedLength, tag)
+ log.Printf("[%v] Begin upload %s to %s", requestId, hash, sv[next_server])
+ go this.uploadToKeepServer(sv[next_server], hash, tr.MakeStreamReader(), upload_status, expectedLength, requestId)
next_server += 1
active += 1
} else {
}
}
}
+ log.Printf("[%v] Replicas remaining to write: %v active uploads: %v",
+ requestId, remaining_replicas, active)
// Now wait for something to happen.
status := <-upload_status
- log.Printf("[%v] Upload to %v status code: %v remaining replicas: %v active: %v",
- tag, status.url, status.statusCode, remaining_replicas, active)
+ active -= 1
+
if status.statusCode == 200 {
// good news!
remaining_replicas -= status.replicas_stored
locator = status.response
- } else {
- // writing to keep server failed for some reason
- log.Printf("[%v] Upload to %v failed with error '%v', response '%v'",
- tag, status.url, status.statusCode, status.err, status.response)
}
- active -= 1
-
}
return locator, this.Want_replicas, nil
projects / arvados.git / blobdiff