package keep
import (
+ "bufio"
+ "encoding/json"
"flag"
"fmt"
- //"git.curoverse.com/arvados.git/sdk/go/keepclient"
"git.curoverse.com/arvados.git/sdk/go/arvadosclient"
- "git.curoverse.com/arvados.git/sdk/go/util"
- "log"
+ "git.curoverse.com/arvados.git/sdk/go/blockdigest"
+ "git.curoverse.com/arvados.git/sdk/go/logger"
+ "git.curoverse.com/arvados.git/sdk/go/manifest"
+ "git.curoverse.com/arvados.git/services/datamanager/loggerutil"
"io/ioutil"
+ "log"
"net/http"
+ "strconv"
"strings"
"sync"
+ "time"
)
type ServerAddress struct {
Host string `json:"service_host"`
- Port int `json:"service_port"`
+ Port int `json:"service_port"`
+ Uuid string `json:"uuid"`
+}
+
+// Info about a particular block returned by the server
+type BlockInfo struct {
+ Digest blockdigest.BlockDigest
+ Size int
+ Mtime int64 // TODO(misha): Replace this with a timestamp.
+}
+
+// Info about a specified block given by a server
+type BlockServerInfo struct {
+ ServerIndex int
+ Size int
+ Mtime int64 // TODO(misha): Replace this with a timestamp.
}
type ServerContents struct {
- BlockDigestToSize map[string]int
+ BlockDigestToInfo map[blockdigest.BlockDigest]BlockInfo
+}
+
+type ServerResponse struct {
+ Address ServerAddress
+ Contents ServerContents
}
type ReadServers struct {
- ReadAllServers bool
- AddressToContents map[ServerAddress]ServerContents
+ ReadAllServers bool
+ KeepServerIndexToAddress []ServerAddress
+ KeepServerAddressToIndex map[ServerAddress]int
+ ServerToContents map[ServerAddress]ServerContents
+ BlockToServers map[blockdigest.BlockDigest][]BlockServerInfo
+ BlockReplicationCounts map[int]int
}
type GetKeepServersParams struct {
Client arvadosclient.ArvadosClient
- Limit int
+ Logger *logger.Logger
+ Limit int
}
type KeepServiceList struct {
- ItemsAvailable int `json:"items_available"`
- KeepServers []ServerAddress `json:"items"`
-}
-
-// Methods to implement util.SdkListResponse Interface
-func (k KeepServiceList) NumItemsAvailable() (numAvailable int, err error) {
- return k.ItemsAvailable, nil
-}
-
-func (k KeepServiceList) NumItemsContained() (numContained int, err error) {
- return len(k.KeepServers), nil
+ ItemsAvailable int `json:"items_available"`
+ KeepServers []ServerAddress `json:"items"`
}
var (
// Don't access the token directly, use getDataManagerToken() to
// make sure it's been read.
- dataManagerToken string
- dataManagerTokenFile string
- dataManagerTokenFileReadOnce sync.Once
+ dataManagerToken string
+ dataManagerTokenFile string
+ dataManagerTokenFileReadOnce sync.Once
)
func init() {
- flag.StringVar(&dataManagerTokenFile,
+ flag.StringVar(&dataManagerTokenFile,
"data-manager-token-file",
"",
"File with the API token we should use to contact keep servers.")
}
-func getDataManagerToken() (string) {
- readDataManagerToken := func () {
+// TODO(misha): Change this to include the UUID as well.
+func (s ServerAddress) String() string {
+ return fmt.Sprintf("%s:%d", s.Host, s.Port)
+}
+
+func getDataManagerToken(arvLogger *logger.Logger) string {
+ readDataManagerToken := func() {
if dataManagerTokenFile == "" {
flag.Usage()
- log.Fatalf("Data Manager Token needed, but data manager token file not specified.")
+ loggerutil.FatalWithMessage(arvLogger,
+ "Data Manager Token needed, but data manager token file not specified.")
} else {
rawRead, err := ioutil.ReadFile(dataManagerTokenFile)
if err != nil {
- log.Fatalf("Unexpected error reading token file %s: %v",
- dataManagerTokenFile,
- err)
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Unexpected error reading token file %s: %v",
+ dataManagerTokenFile,
+ err))
}
dataManagerToken = strings.TrimSpace(string(rawRead))
}
return dataManagerToken
}
+func GetKeepServersAndSummarize(params GetKeepServersParams) (results ReadServers) {
+ results = GetKeepServers(params)
+ log.Printf("Returned %d keep disks", len(results.ServerToContents))
+
+ ComputeBlockReplicationCounts(&results)
+ log.Printf("Replication level distribution: %v",
+ results.BlockReplicationCounts)
+
+ return
+}
+
func GetKeepServers(params GetKeepServersParams) (results ReadServers) {
if ¶ms.Client == nil {
log.Fatalf("params.Client passed to GetKeepServers() should " +
"contain a valid ArvadosClient, but instead it is nil.")
}
- sdkParams := arvadosclient.Dict{}
+ sdkParams := arvadosclient.Dict{
+ "filters": [][]string{[]string{"service_type", "=", "disk"}},
+ }
if params.Limit > 0 {
sdkParams["limit"] = params.Limit
}
var sdkResponse KeepServiceList
err := params.Client.List("keep_services", sdkParams, &sdkResponse)
+
if err != nil {
- log.Fatalf("Error requesting keep disks from API server: %v", err)
+ loggerutil.FatalWithMessage(params.Logger,
+ fmt.Sprintf("Error requesting keep disks from API server: %v", err))
}
- log.Printf("Received keep services list: %v", sdkResponse)
+ if params.Logger != nil {
+ params.Logger.Update(func(p map[string]interface{}, e map[string]interface{}) {
+ keepInfo := make(map[string]interface{})
- {
- var numReceived, numAvailable int
- results.ReadAllServers, numReceived, numAvailable =
- util.ContainsAllAvailableItems(sdkResponse)
+ keepInfo["num_keep_servers_available"] = sdkResponse.ItemsAvailable
+ keepInfo["num_keep_servers_received"] = len(sdkResponse.KeepServers)
+ keepInfo["keep_servers"] = sdkResponse.KeepServers
- if (!results.ReadAllServers) {
- log.Printf("ERROR: Did not receive all keep server addresses.")
- }
- log.Printf("Received %d of %d available keep server addresses.",
- numReceived,
- numAvailable)
+ p["keep_info"] = keepInfo
+ })
}
+ log.Printf("Received keep services list: %+v", sdkResponse)
+
+ if len(sdkResponse.KeepServers) < sdkResponse.ItemsAvailable {
+ loggerutil.FatalWithMessage(params.Logger,
+ fmt.Sprintf("Did not receive all available keep servers: %+v", sdkResponse))
+ }
+
+ results.KeepServerIndexToAddress = sdkResponse.KeepServers
+ results.KeepServerAddressToIndex = make(map[ServerAddress]int)
+ for i, address := range results.KeepServerIndexToAddress {
+ results.KeepServerAddressToIndex[address] = i
+ }
+
+ log.Printf("Got Server Addresses: %v", results)
+
// This is safe for concurrent use
client := http.Client{}
-
- // TODO(misha): Do these in parallel
+
+ // Send off all the index requests concurrently
+ responseChan := make(chan ServerResponse)
for _, keepServer := range sdkResponse.KeepServers {
- url := fmt.Sprintf("http://%s:%d/index", keepServer.Host, keepServer.Port)
- log.Println("About to fetch keep server contents from " + url)
+ // The above keepsServer variable is reused for each iteration, so
+ // it would be shared across all goroutines. This would result in
+ // us querying one server n times instead of n different servers
+ // as we intended. To avoid this we add it as an explicit
+ // parameter which gets copied. This bug and solution is described
+ // in https://golang.org/doc/effective_go.html#channels
+ go func(keepServer ServerAddress) {
+ responseChan <- GetServerContents(params.Logger,
+ keepServer,
+ client)
+ }(keepServer)
+ }
- req, err := http.NewRequest("GET", url, nil)
- if err != nil {
- log.Fatalf("Error building http request for %s: %v", url, err)
+ results.ServerToContents = make(map[ServerAddress]ServerContents)
+ results.BlockToServers = make(map[blockdigest.BlockDigest][]BlockServerInfo)
+
+ // Read all the responses
+ for i := range sdkResponse.KeepServers {
+ _ = i // Here to prevent go from complaining.
+ response := <-responseChan
+ log.Printf("Received channel response from %v containing %d files",
+ response.Address,
+ len(response.Contents.BlockDigestToInfo))
+ results.ServerToContents[response.Address] = response.Contents
+ serverIndex := results.KeepServerAddressToIndex[response.Address]
+ for _, blockInfo := range response.Contents.BlockDigestToInfo {
+ results.BlockToServers[blockInfo.Digest] = append(
+ results.BlockToServers[blockInfo.Digest],
+ BlockServerInfo{ServerIndex: serverIndex,
+ Size: blockInfo.Size,
+ Mtime: blockInfo.Mtime})
}
+ }
+ return
+}
+
+func GetServerContents(arvLogger *logger.Logger,
+ keepServer ServerAddress,
+ client http.Client) (response ServerResponse) {
- req.Header.Add("Authorization",
- fmt.Sprintf("OAuth2 %s", getDataManagerToken()))
+ GetServerStatus(arvLogger, keepServer, client)
+
+ req := CreateIndexRequest(arvLogger, keepServer)
+ resp, err := client.Do(req)
+ if err != nil {
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Error fetching %s: %v", req.URL.String(), err))
+ }
- resp, err := client.Do(req)
+ return ReadServerResponse(arvLogger, keepServer, resp)
+}
+
+func GetServerStatus(arvLogger *logger.Logger,
+ keepServer ServerAddress,
+ client http.Client) {
+ url := fmt.Sprintf("http://%s:%d/status.json",
+ keepServer.Host,
+ keepServer.Port)
+
+ if arvLogger != nil {
+ now := time.Now()
+ arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
+ keepInfo := p["keep_info"].(map[string]interface{})
+ serverInfo := make(map[string]interface{})
+ serverInfo["status_request_sent_at"] = now
+ serverInfo["host"] = keepServer.Host
+ serverInfo["port"] = keepServer.Port
+
+ keepInfo[keepServer.Uuid] = serverInfo
+ })
+ }
+
+ resp, err := client.Get(url)
+ if err != nil {
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Error getting keep status from %s: %v", url, err))
+ } else if resp.StatusCode != 200 {
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Received error code %d in response to request "+
+ "for %s status: %s",
+ resp.StatusCode, url, resp.Status))
+ }
+
+ var keepStatus map[string]interface{}
+ decoder := json.NewDecoder(resp.Body)
+ decoder.UseNumber()
+ err = decoder.Decode(&keepStatus)
+ if err != nil {
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Error decoding keep status from %s: %v", url, err))
+ }
+
+ if arvLogger != nil {
+ now := time.Now()
+ arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
+ keepInfo := p["keep_info"].(map[string]interface{})
+ serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
+ serverInfo["status_response_processed_at"] = now
+ serverInfo["status"] = keepStatus
+ })
+ }
+}
+
+func CreateIndexRequest(arvLogger *logger.Logger,
+ keepServer ServerAddress) (req *http.Request) {
+ url := fmt.Sprintf("http://%s:%d/index", keepServer.Host, keepServer.Port)
+ log.Println("About to fetch keep server contents from " + url)
+
+ if arvLogger != nil {
+ now := time.Now()
+ arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
+ keepInfo := p["keep_info"].(map[string]interface{})
+ serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
+ serverInfo["index_request_sent_at"] = now
+ })
+ }
+
+ req, err := http.NewRequest("GET", url, nil)
+ if err != nil {
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Error building http request for %s: %v", url, err))
+ }
+
+ req.Header.Add("Authorization",
+ fmt.Sprintf("OAuth2 %s", getDataManagerToken(arvLogger)))
+ return
+}
+
+func ReadServerResponse(arvLogger *logger.Logger,
+ keepServer ServerAddress,
+ resp *http.Response) (response ServerResponse) {
+
+ if resp.StatusCode != 200 {
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Received error code %d in response to request "+
+ "for %s index: %s",
+ resp.StatusCode, keepServer.String(), resp.Status))
+ }
+
+ if arvLogger != nil {
+ now := time.Now()
+ arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
+ keepInfo := p["keep_info"].(map[string]interface{})
+ serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
+ serverInfo["index_response_received_at"] = now
+ })
+ }
+
+ response.Address = keepServer
+ response.Contents.BlockDigestToInfo =
+ make(map[blockdigest.BlockDigest]BlockInfo)
+ scanner := bufio.NewScanner(resp.Body)
+ numLines, numDuplicates, numSizeDisagreements := 0, 0, 0
+ for scanner.Scan() {
+ numLines++
+ blockInfo, err := parseBlockInfoFromIndexLine(scanner.Text())
if err != nil {
- log.Fatalf("Error fetching %s: %v", url, err)
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Error parsing BlockInfo from index line "+
+ "received from %s: %v",
+ keepServer.String(),
+ err))
}
- if resp.StatusCode != 200 {
- log.Printf("%v", req)
- log.Fatalf("Received error code %d in response to request for %s: %s",
- resp.StatusCode, url, resp.Status)
+ if storedBlock, ok := response.Contents.BlockDigestToInfo[blockInfo.Digest]; ok {
+ // This server returned multiple lines containing the same block digest.
+ numDuplicates += 1
+ if storedBlock.Size != blockInfo.Size {
+ numSizeDisagreements += 1
+ // TODO(misha): Consider failing here.
+ message := fmt.Sprintf("Saw different sizes for the same block "+
+ "on %s: %+v %+v",
+ keepServer.String(),
+ storedBlock,
+ blockInfo)
+ log.Println(message)
+ if arvLogger != nil {
+ arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
+ keepInfo := p["keep_info"].(map[string]interface{})
+ serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
+ var error_list []string
+ read_error_list, has_list := serverInfo["error_list"]
+ if has_list {
+ error_list = read_error_list.([]string)
+ } // If we didn't have the list, error_list is already an empty list
+ serverInfo["error_list"] = append(error_list, message)
+ })
+ }
+ }
+ // Keep the block that is bigger, or the block that's newer in
+ // the case of a size tie.
+ if storedBlock.Size < blockInfo.Size ||
+ (storedBlock.Size == blockInfo.Size &&
+ storedBlock.Mtime < blockInfo.Mtime) {
+ response.Contents.BlockDigestToInfo[blockInfo.Digest] = blockInfo
+ }
+ } else {
+ response.Contents.BlockDigestToInfo[blockInfo.Digest] = blockInfo
}
}
+ if err := scanner.Err(); err != nil {
+ loggerutil.FatalWithMessage(arvLogger,
+ fmt.Sprintf("Received error scanning index response from %s: %v",
+ keepServer.String(),
+ err))
+ } else {
+ log.Printf("%s index contained %d lines with %d duplicates with "+
+ "%d size disagreements",
+ keepServer.String(),
+ numLines,
+ numDuplicates,
+ numSizeDisagreements)
+
+ if arvLogger != nil {
+ now := time.Now()
+ arvLogger.Update(func(p map[string]interface{}, e map[string]interface{}) {
+ keepInfo := p["keep_info"].(map[string]interface{})
+ serverInfo := keepInfo[keepServer.Uuid].(map[string]interface{})
+ serverInfo["processing_finished_at"] = now
+ serverInfo["lines_received"] = numLines
+ serverInfo["duplicates_seen"] = numDuplicates
+ serverInfo["size_disagreements_seen"] = numSizeDisagreements
+ })
+ }
+ }
+ resp.Body.Close()
return
}
+
+func parseBlockInfoFromIndexLine(indexLine string) (blockInfo BlockInfo, err error) {
+ tokens := strings.Fields(indexLine)
+ if len(tokens) != 2 {
+ err = fmt.Errorf("Expected 2 tokens per line but received a "+
+ "line containing %v instead.",
+ tokens)
+ }
+
+ var locator manifest.BlockLocator
+ if locator, err = manifest.ParseBlockLocator(tokens[0]); err != nil {
+ return
+ }
+ if len(locator.Hints) > 0 {
+ err = fmt.Errorf("Block locator in index line should not contain hints "+
+ "but it does: %v",
+ locator)
+ return
+ }
+
+ blockInfo.Mtime, err = strconv.ParseInt(tokens[1], 10, 64)
+ if err != nil {
+ return
+ }
+ blockInfo.Digest = locator.Digest
+ blockInfo.Size = locator.Size
+ return
+}
+
+func ComputeBlockReplicationCounts(readServers *ReadServers) {
+ readServers.BlockReplicationCounts = make(map[int]int)
+ for _, infos := range readServers.BlockToServers {
+ replication := len(infos)
+ readServers.BlockReplicationCounts[replication] += 1
+ }
+}
projects / arvados.git / blobdiff