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API server explicitly notify systemd of successful startup

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Use the systemd $NOTIFY_SOCKET convention for kube-apiserver
startup. This allows it to be part of dependency trees and for
consumers to wait until it is listening on its ports.

The $NOTIFY_SOCKET protocol is described here:

http://www.freedesktop.org/software/systemd/man/sd_notify.html

Currently this is limited to the kube-apiserver process. Other
kube processes are internal kubernetes moving points. The API
server is the entry point relied on by callers.

100% stolen from Stef Walter from:
https://github.com/GoogleCloudPlatform/kubernetes/pull/8316
This commit is contained in:
Eric Paris
2015-05-24 18:15:19 -04:00
parent f015a21026
commit 28ac1b3395
4 changed files with 42 additions and 0 deletions
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contrib/init/systemd/kube-apiserver.service
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@@ -18,6 +18,7 @@ ExecStart=/usr/bin/kube-apiserver \
$KUBE_ADMISSION_CONTROL \
$KUBE_API_ARGS
Restart=on-failure
Type=notify
LimitNOFILE=65536
[Install]