16306: Merge branch 'master'

[arvados.git] / services / keep-balance / main.go

diff --git a/services/keep-balance/main.go b/services/keep-balance/main.go
index 3316a17240cddd69c37aa804e9bd5e2dbf610def..8b4ee84c716e4596987b1371b38035610f9ffa2f 100644 (file)
--- a/services/keep-balance/main.go
+++ b/services/keep-balance/main.go
@@ -5,96 +5,98 @@
 package main
 
 import (
 package main
 
 import (

-       "encoding/json"
+       "context"

        "flag"
        "fmt"
        "flag"
        "fmt"

-       "log"
-       "net/http"
+       "io"

        "os"
        "os"

-       "time"

 
 

-       "git.curoverse.com/arvados.git/sdk/go/arvados"
-       "git.curoverse.com/arvados.git/sdk/go/config"
+       "git.arvados.org/arvados.git/lib/config"
+       "git.arvados.org/arvados.git/lib/service"
+       "git.arvados.org/arvados.git/sdk/go/arvados"
+       "git.arvados.org/arvados.git/sdk/go/ctxlog"
+       "git.arvados.org/arvados.git/sdk/go/health"
+       "github.com/prometheus/client_golang/prometheus"

        "github.com/sirupsen/logrus"
 )
 
        "github.com/sirupsen/logrus"
 )
 

-var debugf = func(string, ...interface{}) {}
-

 func main() {
 func main() {

-       var cfg Config
-       var runOptions RunOptions
+       os.Exit(runCommand(os.Args[0], os.Args[1:], os.Stdin, os.Stdout, os.Stderr))
+}
+
+func runCommand(prog string, args []string, stdin io.Reader, stdout, stderr io.Writer) int {
+       logger := ctxlog.FromContext(context.Background())

 
 

-       configPath := flag.String("config", defaultConfigPath,
-               "`path` of JSON or YAML configuration file")
-       serviceListPath := flag.String("config.KeepServiceList", "",
-               "`path` of JSON or YAML file with list of keep services to balance, as given by \"arv keep_service list\" "+
-                       "(default: config[\"KeepServiceList\"], or if none given, get all available services and filter by config[\"KeepServiceTypes\"])")
-       flag.BoolVar(&runOptions.Once, "once", false,
+       var options RunOptions
+       flags := flag.NewFlagSet(prog, flag.ExitOnError)
+       flags.BoolVar(&options.Once, "once", false,

                "balance once and then exit")
                "balance once and then exit")

-       flag.BoolVar(&runOptions.CommitPulls, "commit-pulls", false,
+       flags.BoolVar(&options.CommitPulls, "commit-pulls", false,

                "send pull requests (make more replicas of blocks that are underreplicated or are not in optimal rendezvous probe order)")
                "send pull requests (make more replicas of blocks that are underreplicated or are not in optimal rendezvous probe order)")

-       flag.BoolVar(&runOptions.CommitTrash, "commit-trash", false,
+       flags.BoolVar(&options.CommitTrash, "commit-trash", false,

                "send trash requests (delete unreferenced old blocks, and excess replicas of overreplicated blocks)")
                "send trash requests (delete unreferenced old blocks, and excess replicas of overreplicated blocks)")

-       dumpConfig := flag.Bool("dump-config", false, "write current configuration to stdout and exit")
-       dumpFlag := flag.Bool("dump", false, "dump details for each block to stdout")
-       debugFlag := flag.Bool("debug", false, "enable debug messages")
-       getVersion := flag.Bool("version", false, "Print version information and exit.")
-       flag.Usage = usage
-       flag.Parse()
+       flags.Bool("version", false, "Write version information to stdout and exit 0")
+       dumpFlag := flags.Bool("dump", false, "dump details for each block to stdout")

 
 

-       // Print version information if requested
-       if *getVersion {
-               fmt.Printf("keep-balance %s\n", version)
-               return
-       }
+       loader := config.NewLoader(os.Stdin, logger)
+       loader.SetupFlags(flags)

 
 

-       mustReadConfig(&cfg, *configPath)
-       if *serviceListPath != "" {
-               mustReadConfig(&cfg.KeepServiceList, *serviceListPath)
-       }
+       munged := loader.MungeLegacyConfigArgs(logger, args, "-legacy-keepbalance-config")
+       flags.Parse(munged)

 
 

-       if *dumpConfig {
-               log.Fatal(config.DumpAndExit(cfg))
+       if *dumpFlag {
+               dumper := logrus.New()
+               dumper.Out = os.Stdout
+               dumper.Formatter = &logrus.TextFormatter{}
+               options.Dumper = dumper

        }
 
        }
 

-       to := time.Duration(cfg.RequestTimeout)
-       if to == 0 {
-               to = 30 * time.Minute
+       // Drop our custom args that would be rejected by the generic
+       // service.Command
+       args = nil
+       dropFlag := map[string]bool{
+               "once":         true,
+               "commit-pulls": true,
+               "commit-trash": true,
+               "dump":         true,

        }
        }

-       arvados.DefaultSecureClient.Timeout = to
-       arvados.InsecureHTTPClient.Timeout = to
-       http.DefaultClient.Timeout = to
+       flags.Visit(func(f *flag.Flag) {
+               if !dropFlag[f.Name] {
+                       args = append(args, "-"+f.Name, f.Value.String())
+               }
+       })

 
 

-       log.Printf("keep-balance %s started", version)
+       return service.Command(arvados.ServiceNameKeepbalance,
+               func(ctx context.Context, cluster *arvados.Cluster, token string, registry *prometheus.Registry) service.Handler {
+                       if !options.Once && cluster.Collections.BalancePeriod == arvados.Duration(0) {
+                               return service.ErrorHandler(ctx, cluster, fmt.Errorf("cannot start service: Collections.BalancePeriod is zero (if you want to run once and then exit, use the -once flag)"))
+                       }

 
 

-       if *debugFlag {
-               debugf = log.Printf
-               if j, err := json.Marshal(cfg); err != nil {
-                       log.Fatal(err)
-               } else {
-                       log.Printf("config is %s", j)
-               }
-       }
-       if *dumpFlag {
-               runOptions.Dumper = logrus.New()
-               runOptions.Dumper.Out = os.Stdout
-               runOptions.Dumper.Formatter = &logrus.TextFormatter{}
-       }
-       srv, err := NewServer(cfg, runOptions)
-       if err != nil {
-               // (don't run)
-       } else if runOptions.Once {
-               _, err = srv.Run()
-       } else {
-               err = srv.RunForever(nil)
-       }
-       if err != nil {
-               log.Fatal(err)
-       }
-}
+                       ac, err := arvados.NewClientFromConfig(cluster)
+                       ac.AuthToken = token
+                       if err != nil {
+                               return service.ErrorHandler(ctx, cluster, fmt.Errorf("error initializing client from cluster config: %s", err))
+                       }

 
 

-func mustReadConfig(dst interface{}, path string) {
-       if err := config.LoadFile(dst, path); err != nil {
-               log.Fatal(err)
-       }
+                       if options.Logger == nil {
+                               options.Logger = ctxlog.FromContext(ctx)
+                       }
+
+                       srv := &Server{
+                               Cluster:    cluster,
+                               ArvClient:  ac,
+                               RunOptions: options,
+                               Metrics:    newMetrics(registry),
+                               Logger:     options.Logger,
+                               Dumper:     options.Dumper,
+                       }
+                       srv.Handler = &health.Handler{
+                               Token:  cluster.ManagementToken,
+                               Prefix: "/_health/",
+                               Routes: health.Routes{"ping": srv.CheckHealth},
+                       }
+
+                       go srv.run()
+                       return srv
+               }).RunCommand(prog, args, stdin, stdout, stderr)

 }
 }