-package main
+// Copyright (C) The Arvados Authors. All rights reserved.
+//
+// SPDX-License-Identifier: AGPL-3.0
+
+package keepstore
import (
- "crypto/rand"
- "errors"
+ "context"
"fmt"
- "git.curoverse.com/arvados.git/sdk/go/keepclient"
"io"
"io/ioutil"
- "log"
"time"
+
+ "git.arvados.org/arvados.git/sdk/go/keepclient"
)
-/*
- Keepstore initiates pull worker channel goroutine.
- The channel will process pull list.
- For each (next) pull request:
- For each locator listed, execute Pull on the server(s) listed
- Skip the rest of the servers if no errors
- Repeat
-*/
-func RunPullWorker(pullq *WorkQueue, keepClient *keepclient.KeepClient) {
- nextItem := pullq.NextItem
- for item := range nextItem {
- pullRequest := item.(PullRequest)
- err := PullItemAndProcess(item.(PullRequest), GenerateRandomApiToken(), keepClient)
+// RunPullWorker receives PullRequests from pullq, invokes
+// PullItemAndProcess on each one. After each PR, it logs a message
+// indicating whether the pull was successful.
+func (h *handler) runPullWorker(pullq *WorkQueue) {
+ for item := range pullq.NextItem {
+ pr := item.(PullRequest)
+ err := h.pullItemAndProcess(pr)
+ pullq.DoneItem <- struct{}{}
if err == nil {
- log.Printf("Pull %s success", pullRequest)
+ h.Logger.Printf("Pull %s success", pr)
} else {
- log.Printf("Pull %s error: %s", pullRequest, err)
+ h.Logger.Printf("Pull %s error: %s", pr, err)
}
}
}
-/*
- For each Pull request:
- Generate a random API token.
- Generate a permission signature using this token, timestamp ~60 seconds in the future, and desired block hash.
- Using this token & signature, retrieve the given block.
- Write to storage
-*/
-func PullItemAndProcess(pullRequest PullRequest, token string, keepClient *keepclient.KeepClient) (err error) {
- keepClient.Arvados.ApiToken = token
+// PullItemAndProcess executes a pull request by retrieving the
+// specified block from one of the specified servers, and storing it
+// on a local volume.
+//
+// If the PR specifies a non-blank mount UUID, PullItemAndProcess will
+// only attempt to write the data to the corresponding
+// volume. Otherwise it writes to any local volume, as a PUT request
+// would.
+func (h *handler) pullItemAndProcess(pullRequest PullRequest) error {
+ var vol *VolumeMount
+ if uuid := pullRequest.MountUUID; uuid != "" {
+ vol = h.volmgr.Lookup(pullRequest.MountUUID, true)
+ if vol == nil {
+ return fmt.Errorf("pull req has nonexistent mount: %v", pullRequest)
+ }
+ }
- service_roots := make(map[string]string)
+ // Make a private copy of keepClient so we can set
+ // ServiceRoots to the source servers specified in the pull
+ // request.
+ keepClient := *h.keepClient
+ serviceRoots := make(map[string]string)
for _, addr := range pullRequest.Servers {
- service_roots[addr] = addr
+ serviceRoots[addr] = addr
}
- keepClient.SetServiceRoots(service_roots, nil, nil)
+ keepClient.SetServiceRoots(serviceRoots, nil, nil)
- // Generate signature with a random token
- expires_at := time.Now().Add(60 * time.Second)
- signedLocator := SignLocator(pullRequest.Locator, token, expires_at)
+ signedLocator := SignLocator(h.Cluster, pullRequest.Locator, keepClient.Arvados.ApiToken, time.Now().Add(time.Minute))
- reader, contentLen, _, err := GetContent(signedLocator, keepClient)
+ reader, contentLen, _, err := GetContent(signedLocator, &keepClient)
if err != nil {
- return
+ return err
}
if reader == nil {
- return errors.New(fmt.Sprintf("No reader found for : %s", signedLocator))
+ return fmt.Errorf("No reader found for : %s", signedLocator)
}
defer reader.Close()
- read_content, err := ioutil.ReadAll(reader)
+ readContent, err := ioutil.ReadAll(reader)
if err != nil {
return err
}
- if (read_content == nil) || (int64(len(read_content)) != contentLen) {
- return errors.New(fmt.Sprintf("Content not found for: %s", signedLocator))
+ if (readContent == nil) || (int64(len(readContent)) != contentLen) {
+ return fmt.Errorf("Content not found for: %s", signedLocator)
}
- err = PutContent(read_content, pullRequest.Locator)
- return
+ return writePulledBlock(h.volmgr, vol, readContent, pullRequest.Locator)
}
-// Fetch the content for the given locator using keepclient.
-var GetContent = func(signedLocator string, keepClient *keepclient.KeepClient) (
- reader io.ReadCloser, contentLength int64, url string, err error) {
- reader, blocklen, url, err := keepClient.Get(signedLocator)
- return reader, blocklen, url, err
+// GetContent fetches the content for the given locator using keepclient.
+var GetContent = func(signedLocator string, keepClient *keepclient.KeepClient) (io.ReadCloser, int64, string, error) {
+ return keepClient.Get(signedLocator)
}
-const ALPHA_NUMERIC = "0123456789abcdefghijklmnopqrstuvwxyz"
-
-func GenerateRandomApiToken() string {
- var bytes = make([]byte, 36)
- rand.Read(bytes)
- for i, b := range bytes {
- bytes[i] = ALPHA_NUMERIC[b%byte(len(ALPHA_NUMERIC))]
+var writePulledBlock = func(volmgr *RRVolumeManager, volume Volume, data []byte, locator string) error {
+ if volume != nil {
+ return volume.Put(context.Background(), locator, data)
}
- return (string(bytes))
-}
-
-// Put block
-var PutContent = func(content []byte, locator string) (err error) {
- err = PutBlock(content, locator)
- return
+ _, err := PutBlock(context.Background(), volmgr, data, locator, nil)
+ return err
}
projects / arvados.git / blobdiff