mirror of https://github.com/slackhq/nebula.git
43 lines
1.1 KiB
Go
43 lines
1.1 KiB
Go
package main
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import (
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"net"
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"os"
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"time"
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"github.com/sirupsen/logrus"
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)
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// SdNotifyReady tells systemd the service is ready and dependent services can now be started
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// https://www.freedesktop.org/software/systemd/man/sd_notify.html
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// https://www.freedesktop.org/software/systemd/man/systemd.service.html
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const SdNotifyReady = "READY=1"
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func notifyReady(l *logrus.Logger) {
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sockName := os.Getenv("NOTIFY_SOCKET")
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if sockName == "" {
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l.Debugln("NOTIFY_SOCKET systemd env var not set, not sending ready signal")
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return
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}
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conn, err := net.DialTimeout("unixgram", sockName, time.Second)
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if err != nil {
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l.WithError(err).Error("failed to connect to systemd notification socket")
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return
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}
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defer conn.Close()
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err = conn.SetWriteDeadline(time.Now().Add(time.Second))
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if err != nil {
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l.WithError(err).Error("failed to set the write deadline for the systemd notification socket")
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return
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}
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if _, err = conn.Write([]byte(SdNotifyReady)); err != nil {
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l.WithError(err).Error("failed to signal the systemd notification socket")
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return
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}
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l.Debugln("notified systemd the service is ready")
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}
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