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@@ -0,0 +1,22 @@
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+[Unit]
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+Description=Docker Application Container Engine
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+Documentation=https://docs.docker.com
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+After=network-online.target firewalld.service containerd.service
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+Wants=network-online.target
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+Requires=docker.socket containerd.service
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+
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+[Service]
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+Type=notify
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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 -H fd:// --containerd=/run/containerd/containerd.sock -H tcp://0.0.0.0:9009
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+ExecReload=/bin/kill -s HUP $MAINPID
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+TimeoutSec=0
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+RestartSec=2
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+Restart=always
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+
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+# Note that StartLimit* options were moved from "Service" to "Unit" in systemd 229.
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+# Both the old, and new location are accepted by systemd 229 and up, so using the old location
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+# to make them work for either version of systemd.
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+StartLimitBurst=3
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chendelin1982