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e7ad8e2b28
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 <github@gone.nl>
42 lines
1.5 KiB
Desktop File
42 lines
1.5 KiB
Desktop File
[Unit]
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Description=Docker Application Container Engine
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Documentation=https://docs.docker.com
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BindsTo=containerd.service
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After=network-online.target firewalld.service
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Wants=network-online.target
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[Service]
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# Install containerd-shim-process if it's not already installed
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ExecStartPre=/usr/libexec/containerd-offline-installer /var/lib/containerd-offline-installer/containerd-shim-process.tar docker.io/docker/containerd-shim-process
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# the default is not to use systemd for cgroups because the delegate issues still
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# exists and systemd currently does not support the cgroup feature set required
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# for containers run by docker
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ExecStart=/usr/bin/dockerd
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ExecReload=/bin/kill -s HUP $MAINPID
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ExecStopPost=/usr/bin/dockerd post-stop
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TimeoutSec=0
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RestartSec=2
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Restart=always
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# On RPM Based distributions PATH isn't defined so we define it here
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# /opt/containerd/bin is in front so dockerd grabs the correct runc binary
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Environment="PATH=/opt/containerd/bin:/sbin:/usr/bin:/usr/local/bin:$PATH"
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# Having non-zero Limit*s causes performance problems due to accounting overhead
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# in the kernel. We recommend using cgroups to do container-local accounting.
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LimitNOFILE=infinity
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LimitNPROC=infinity
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LimitCORE=infinity
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# Comment TasksMax if your systemd version does not supports it.
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# Only systemd 226 and above support this option.
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TasksMax=infinity
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# set delegate yes so that systemd does not reset the cgroups of docker containers
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Delegate=yes
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# kill only the docker process, not all processes in the cgroup
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KillMode=process
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[Install]
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WantedBy=multi-user.target
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