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//
// Copyright (c) SAS Institute Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
package workercmd
import (
"context"
"fmt"
"io"
"net/http"
"os"
"os/signal"
"sync"
"syscall"
"time"
"github.com/rs/zerolog"
"github.com/rs/zerolog/log"
"github.com/spf13/cobra"
"github.com/sassoftware/relic/v7/cmdline/shared"
"github.com/sassoftware/relic/v7/internal/activation"
"github.com/sassoftware/relic/v7/internal/activation/activatecmd"
"github.com/sassoftware/relic/v7/internal/zhttp"
"github.com/sassoftware/relic/v7/token/open"
"github.com/sassoftware/relic/v7/token/tokencache"
)
func init() {
AddWorkerCommand(shared.RootCmd)
}
func AddWorkerCommand(parent *cobra.Command) {
wc := &cobra.Command{
Use: "worker",
Run: worker,
Hidden: true,
}
parent.AddCommand(wc)
}
func worker(cmd *cobra.Command, args []string) {
if len(args) != 2 {
log.Fatal().Msg("invalid argument")
}
shared.ArgConfig = args[0]
tokenName := args[1]
if err := runWorker(tokenName); err != nil {
log.Fatal().Msgf("worker stopping for token %s", tokenName)
}
}
func runWorker(tokenName string) error {
if err := shared.InitConfig(); err != nil {
return err
}
cookie, err := io.ReadAll(os.Stdin)
if err != nil {
return err
}
lis, err := activation.GetListener(0, "tcp", "")
if err != nil {
return err
}
cfg := shared.CurrentConfig
tok, err := open.Token(cfg, tokenName, nil)
if err != nil {
return err
}
if err := zhttp.SetupLogging(cfg.Server.LogLevel, cfg.Server.LogFile); err != nil {
return fmt.Errorf("configuring logging: %w", err)
}
log.Logger.UpdateContext(func(c zerolog.Context) zerolog.Context {
return c.Str("token", tokenName).Int("pid", os.Getpid())
})
tconf := tok.Config()
if tconf.RateLimit != 0 {
tok = tokencache.NewLimiter(tok, tconf.RateLimit, tconf.RateBurst)
}
expiry := time.Second * time.Duration(cfg.Server.TokenCacheSeconds)
handler := &handler{
token: tokencache.New(tok, expiry),
cookie: cookie,
}
srv := &http.Server{Handler: handler}
wg := new(sync.WaitGroup)
handler.shutdown = func() {
// keep the main goroutine from exiting until all requests are served
wg.Add(1)
// notify parent that this process is doomed and to start another one
_ = activatecmd.DaemonStopping()
// stop accepting requests and wait for ongoing ones to finish
_ = srv.Shutdown(context.Background())
wg.Done()
}
go handler.watchSignals()
go handler.healthCheck()
_ = activation.DaemonReady()
err = srv.Serve(lis)
if err == http.ErrServerClosed {
err = nil
}
wg.Wait() // wait for shutdown to finish
return err
}
func (h *handler) watchSignals() {
ch := make(chan os.Signal, 1)
signal.Notify(ch,
syscall.SIGINT,
syscall.SIGTERM,
syscall.SIGQUIT,
)
<-ch
signal.Stop(ch)
h.shutdown()
}
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