From f74b856e1ac2805fe48ceb52bc83cd7a3cec870c Mon Sep 17 00:00:00 2001 From: Sebastiaan van Stijn Date: Mon, 2 May 2016 10:27:07 +0200 Subject: [PATCH] Add support for reloading daemon configuration through systemd This adds support for reloading the docker daemon (SIGHIUP) so that changes in '/etc/docker/daemon.json' can be loaded at runtime by reloading the service through systemd ('systemctl reload docker') Before this change, systemd would output an error that "reloading" is not supported for the docker service; systemctl reload docker Failed to reload docker.service: Job type reload is not applicable for unit docker.service. After this change, the docker daemon can be reloaded through 'systemctl reload docker', which reloads the configuration; journalctl -f -u docker.service May 02 03:49:20 testing systemd[1]: Reloading Docker Application Container Engine. May 02 03:49:20 testing docker[28496]: time="2016-05-02T03:49:20.143964103-04:00" level=info msg="Got signal to reload configuration, reloading from: /etc/docker/daemon.json" May 02 03:49:20 testing systemd[1]: Reloaded Docker Application Container Engine. Signed-off-by: Sebastiaan van Stijn --- contrib/init/systemd/docker.service | 1 + 1 file changed, 1 insertion(+) diff --git a/contrib/init/systemd/docker.service b/contrib/init/systemd/docker.service index 28d2f4eafc..6926df2397 100644 --- a/contrib/init/systemd/docker.service +++ b/contrib/init/systemd/docker.service @@ -10,6 +10,7 @@ Type=notify # exists and systemd currently does not support the cgroup feature set required # for containers run by docker ExecStart=/usr/bin/docker daemon -H fd:// +ExecReload=/bin/kill -s HUP $MAINPID MountFlags=slave LimitNOFILE=1048576 LimitNPROC=1048576