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Munin::Common::Daemon − utilities for daemons.
The following
daemon-related features are supported:
sd_notify: signal readiness of the daemon
emit_sd_notify_message
Example:
emit_sd_notify_message();
Send a
"ready" signal according to the
"sd_notify" interface:
1. check whether the environment variable "
NOTIFY_SOCKET" is defined
2. remove this variable from the environment (this interface
is not
propagated to children)
3. send the string "READY=1" to the socket
The function returns silently, if something fails.
The function should be called as soon as the service is ready to accept requests. Calling this function is always safe − independent of the caller supporting the "sd_notify" interface or not.
Examples for
callers supporting the "sd_notify" interface:
systemd: see "Type=Notify" in "5" in
systemd.exec
start-stop-daemon: see
"−−notify−await" in
"8" in start-stop-daemon
See the specification of "sd_notify" <https://www.freedesktop.org/software/systemd/man/sd_notify.html> for further details of this interface.