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|
// +build linux,!remote
package system
import (
"context"
"net"
"os"
"os/signal"
"strings"
"github.com/containers/podman/v2/cmd/podman/utils"
"github.com/containers/podman/v2/libpod"
api "github.com/containers/podman/v2/pkg/api/server"
"github.com/containers/podman/v2/pkg/domain/entities"
"github.com/containers/podman/v2/pkg/domain/infra"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
"github.com/spf13/pflag"
)
func restService(opts entities.ServiceOptions, flags *pflag.FlagSet, cfg *entities.PodmanConfig) error {
var (
listener *net.Listener
err error
)
if opts.URI != "" {
fields := strings.Split(opts.URI, ":")
if len(fields) == 1 {
return errors.Errorf("%s is an invalid socket destination", opts.URI)
}
address := strings.Join(fields[1:], ":")
l, err := net.Listen(fields[0], address)
if err != nil {
return errors.Wrapf(err, "unable to create socket")
}
listener = &l
}
rt, err := infra.GetRuntime(context.Background(), flags, cfg)
if err != nil {
return err
}
startWatcher(rt)
server, err := api.NewServerWithSettings(rt, opts.Timeout, listener)
if err != nil {
return err
}
defer func() {
if err := server.Shutdown(); err != nil {
logrus.Warnf("Error when stopping API service: %s", err)
}
}()
err = server.Serve()
if listener != nil {
_ = (*listener).Close()
}
return err
}
// startWatcher starts a new SIGHUP go routine for the current config.
func startWatcher(rt *libpod.Runtime) {
// Setup the signal notifier
ch := make(chan os.Signal, 1)
signal.Notify(ch, utils.SIGHUP)
go func() {
for {
// Block until the signal is received
logrus.Debugf("waiting for SIGHUP to reload configuration")
<-ch
if err := rt.Reload(); err != nil {
logrus.Errorf("unable to reload configuration: %v", err)
continue
}
}
}()
logrus.Debugf("registered SIGHUP watcher for config")
}
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