63 lines
1.3 KiB
Go
63 lines
1.3 KiB
Go
package element
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import (
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"fmt"
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"net"
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"os"
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"syscall"
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"github.com/sirupsen/logrus"
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)
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// Start activates the GRPC listener as well as joins the cluster if specified and blocks until a SIGTERM or SIGINT is received
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func (a *Agent) Start(signals chan os.Signal) error {
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logrus.Infof("starting agent: grpc=%s:%d bind=%s:%d advertise=%s:%d",
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a.config.AgentAddr,
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a.config.AgentPort,
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a.config.BindAddr,
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a.config.BindPort,
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a.config.AdvertiseAddr,
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a.config.AdvertisePort,
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)
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l, err := net.Listen("tcp", fmt.Sprintf("%s:%d", a.config.AgentAddr, a.config.AgentPort))
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if err != nil {
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return err
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}
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go a.grpcServer.Serve(l)
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// start node metadata updater
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go func() {
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for {
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<-a.peerUpdateChan
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if err := a.members.UpdateNode(nodeUpdateTimeout); err != nil {
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logrus.Errorf("error updating node metadata: %s", err)
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}
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}
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}()
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if len(a.config.Peers) > 0 {
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logrus.Debugf("joining peers: %v", a.config.Peers)
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n, err := a.members.Join(a.config.Peers)
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if err != nil {
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return err
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}
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logrus.Infof("joined %d peer(s)", n)
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}
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for {
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select {
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case s := <-signals:
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switch s {
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case syscall.SIGTERM, syscall.SIGINT:
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logrus.Debug("shutting down")
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if err := a.Shutdown(); err != nil {
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return err
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}
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return nil
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}
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}
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}
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}
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