/
check.go
307 lines (278 loc) · 7.75 KB
/
check.go
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package health
import (
"badoo/_packages/log"
"badoo/_packages/service"
"badoo/_packages/service/config"
"github.com/badoo/lsd/internal/client"
"github.com/badoo/lsd/internal/client/offsets"
"errors"
"flag"
"fmt"
"os"
"strings"
"github.com/badoo/lsd/internal/client/files"
"encoding/json"
"github.com/badoo/lsd/proto"
"io"
"badoo/_packages/gpbrpc"
"badoo/_packages/service/stats"
"io/ioutil"
"net/http"
"time"
"github.com/fsnotify/fsnotify"
"golang.org/x/sync/errgroup"
)
const HEALTHCHECK_BUFFER_SIZE = 1000
const HEALTHCHECK_STATS_CONNECT_TIMEOUT = time.Second * 3
const HEALTHCHECK_STATS_REQUEST_TIMEOUT = time.Second * 3
type Result struct {
IsRunning bool `json:"is_running"`
Client ClientResult `json:"client"`
Server ServerResult `json:"server"`
}
type ClientResult struct {
Undelivered map[string]uint64 `json:"undelivered"`
BacklogSize int `json:"backlog_size"`
Errors []string `json:"errors"`
}
type ServerResult struct {
Categories map[string]CategoryInfo `json:"categories"`
Errors []string `json:"errors"`
}
type CategoryInfo struct {
Count uint64 `json:"count"`
OldestTs int64 `json:"oldest_ts"`
}
func Check() {
var configPath string
flag.StringVar(&configPath, "c", "", "path to config file")
flag.Parse()
if configPath == "" {
log.Fatalf("no config file specified with -c")
}
config := &struct {
badoo_config.ServiceConfig
lsd.LsdConfig
}{}
err := service.ParseConfigFromFile(configPath, config)
if err != nil {
log.Fatalf("failed to parse config '%s': %v", configPath, err)
}
// forcing logs to come only to output
log.SetOutput(os.Stderr)
log.SetLevel(log.Level(config.DaemonConfig.GetLogLevel()))
isUp, err := isDaemonUp(config.GetDaemonConfig().GetListen())
if err != nil {
log.Fatalf("failed to check that daemon is up: %v", err)
}
backlogSize, err := getBacklogSize(isUp, config.GetDaemonConfig())
if err != nil {
log.Fatalf("failed to get backlog size: %v", err)
}
res := Result{
IsRunning: isUp,
Client: checkClient(config.GetClientConfig(), backlogSize),
Server: checkServer(config.GetServerConfig()),
}
jsonBytes, err := json.Marshal(res)
if err != nil {
log.Fatalf("failed to encode %v to json: %v", res, err)
}
fmt.Println(string(jsonBytes))
}
func isDaemonUp(listenRows []*badoo_config.ServiceConfigDaemonConfigTListenT) (bool, error) {
for _, listen := range listenRows {
if listen.GetProto() != "service-stats-gpb" {
continue
}
port, err := extractPort(listen.GetAddress())
if err != nil {
return false, fmt.Errorf("invalid service-stats-gpb listen format: %v", err)
}
cli := gpbrpc.NewClient(
"localhost:"+port,
&badoo_service.Gpbrpc,
&gpbrpc.GpbsCodec,
HEALTHCHECK_STATS_CONNECT_TIMEOUT,
HEALTHCHECK_STATS_REQUEST_TIMEOUT,
)
_, _, err = cli.Call(&badoo_service.RequestStats{})
cli.Close()
return err == nil, nil
}
return false, errors.New("no service-stats-gpb section in config")
}
func getBacklogSize(isUp bool, daemonConfig *badoo_config.ServiceConfigDaemonConfigT) (int, error) {
if !isUp {
return 0, nil
}
port, err := extractPort(daemonConfig.GetHttpPprofAddr())
if err != nil {
return 0, fmt.Errorf("invalid http pprof address: %v", err)
}
resp, err := http.Get("http://localhost:" + port + "/debug/vars")
if err != nil {
return 0, fmt.Errorf("http request failed: %v", err)
}
if resp.StatusCode != 200 {
return 0, fmt.Errorf("http request failed with non-200 status code: %d", resp.StatusCode)
}
jsonResp, err := ioutil.ReadAll(resp.Body)
if err != nil {
return 0, fmt.Errorf("failed to read http response body: %v", err)
}
debugVars := &struct {
BacklogSize int `json:"out_backlog_size"`
}{}
err = json.Unmarshal(jsonResp, debugVars)
if err != nil {
return 0, fmt.Errorf("failed to decode json respose: %v", err)
}
return debugVars.BacklogSize, nil
}
func checkClient(config *lsd.LsdConfigClientConfigT, backlogSize int) ClientResult {
result := ClientResult{
Undelivered: make(map[string]uint64),
BacklogSize: backlogSize,
Errors: make([]string, 0),
}
if config == nil {
return result
}
fatalErr := func() error {
odb, err := offsets.InitDb(config.GetOffsetsDb())
if err != nil {
return fmt.Errorf("failed to load offsets db: %v", err)
}
wg := errgroup.Group{}
sourceDir := strings.TrimRight(config.GetSourceDir(), string(os.PathSeparator))
filesCh := make(chan fsnotify.Event, HEALTHCHECK_BUFFER_SIZE)
wg.Go(func() error {
defer close(filesCh)
err = client.ReadDirIntoChannel(sourceDir, filesCh, true)
if err != nil {
return fmt.Errorf("failed to read %s files: %v", sourceDir, err)
}
return nil
})
wg.Go(func() error {
for {
event, ok := <-filesCh
if !ok {
return nil
}
err := func() error {
st, err := files.Lstat(event.Name)
if os.IsNotExist(err) {
return nil
}
if err != nil {
return fmt.Errorf("failed to stat %s: %v", event.Name, err)
}
// we can have symlinks in workdir running in router/relay mode
// just ignore them
if st.IsDir() || st.IsLink() {
return nil
}
entry, _ := odb.Get(st.Inode())
if !entry.IsValid(event.Name) {
// inode collision, no need to do anything with it
return nil
}
diff := uint64(st.Size()) - entry.Offset
if diff < 0 {
return fmt.Errorf("file %s is delivered beyond it's offset: %d/%d", event.Name, st.Size(), entry.Offset)
}
result.Undelivered[client.ExtractCategoryName(sourceDir, event.Name)] += diff
return nil
}()
if err != nil {
result.Errors = append(result.Errors, err.Error())
}
}
})
return wg.Wait()
}()
if fatalErr != nil {
result.Errors = append(result.Errors, fatalErr.Error())
}
return result
}
func checkServer(config *lsd.LsdConfigServerConfigT) ServerResult {
result := ServerResult{
Categories: make(map[string]CategoryInfo),
Errors: make([]string, 0),
}
if config == nil {
return result
}
categories, err := func() ([]string, error) {
rootFp, err := os.Open(config.GetTargetDir())
if err != nil {
return nil, fmt.Errorf("failed to open %s: %v", config.GetTargetDir(), err)
}
categoryDirs := make([]string, 0)
for {
entries, err := rootFp.Readdir(HEALTHCHECK_BUFFER_SIZE)
if err == io.EOF {
break
}
if err != nil {
return categoryDirs, fmt.Errorf("failed to read %s: %v", config.GetTargetDir(), err)
}
for _, entry := range entries {
if !entry.IsDir() {
continue
}
categoryDirs = append(categoryDirs, entry.Name())
}
}
return categoryDirs, nil
}()
if err != nil {
result.Errors = append(result.Errors, err.Error())
return result
}
for _, category := range categories {
err := func() error {
categoryPath := strings.TrimSuffix(config.GetTargetDir(), string(os.PathSeparator)) + string(os.PathSeparator) + category
fp, err := os.Open(categoryPath)
if err != nil {
return fmt.Errorf("failed to open %s: %v", categoryPath, err)
}
info := CategoryInfo{}
for {
entries, err := fp.Readdir(HEALTHCHECK_BUFFER_SIZE)
if err == io.EOF {
break
}
if err != nil {
return fmt.Errorf("failed to read dir %s: %v", categoryPath, err)
}
for _, entry := range entries {
if !entry.Mode().IsRegular() {
continue
}
mtime := entry.ModTime().Unix()
if info.OldestTs == 0 || mtime > info.OldestTs {
info.OldestTs = mtime
}
info.Count++
}
}
result.Categories[category] = info
return nil
}()
if err != nil {
result.Errors = append(result.Errors, err.Error())
}
}
return result
}
func extractPort(s string) (string, error) {
chunks := strings.SplitN(s, ":", 2)
if len(chunks) < 2 {
return s, fmt.Errorf("invalid address format address: %s", s)
}
return chunks[1], nil
}