(this is for Fedora 22 and above of Atomic Host and CentOS 7) Modifying params within /etc/sysconfig/docker to params with new lines cause the Docker daemon to break.
For example: SystemD file: [Unit] Description=Docker Application Container Engine Documentation=http://docs.docker.com After=network.target Wants=docker-storage-setup.service [Service] Type=notify EnvironmentFile=-/etc/sysconfig/docker EnvironmentFile=-/etc/sysconfig/docker-storage EnvironmentFile=-/etc/sysconfig/docker-network Environment=GOTRACEBACK=crash ExecStart=/usr/bin/docker -d $DOCKER_OPTIONS LimitNOFILE=1048576 LimitNPROC=1048576 LimitCORE=infinity MountFlags=slave [Install] WantedBy=multi-user.target /etc/sysconfig/docker file: DOCKER_OPTIONS='-H tcp://0.0.0.0:2376 -H unix:///var/run/docker.sock --storage-driver overlay --tlsverify --tlscacert /etc/docker/ca.pem --tlscert /etc/docker/server.pem --tlskey /etc/docker/server-key.pem --label provider=generic' SystemD status: [centos@cloud ~]$ sudo systemctl status docker docker.service - Docker Application Container Engine Loaded: loaded (/usr/lib/systemd/system/docker.service; enabled) Drop-In: /usr/lib/systemd/system/docker.service.d └─flannel.conf Active: failed (Result: exit-code) since Tue 2016-03-15 16:05:16 UTC; 11s ago Docs: http://docs.docker.com Process: 4251 ExecStart=/usr/bin/docker -d $DOCKER_OPTIONS (code=exited, status=1/FAILURE) Main PID: 4251 (code=exited, status=1/FAILURE) Mar 15 16:05:16 test systemd[1]: Starting Docker Application Container Engine... Mar 15 16:05:16 test docker[4251]: time="2016-03-15T16:05:16.467507082Z" level=info msg="Listening for HTTP on unix (....sock)" Mar 15 16:05:16 test docker[4251]: time="2016-03-15T16:05:16.502458296Z" level=error msg="WARNING: No --storage-opt d...on use" Mar 15 16:05:16 test docker[4251]: time="2016-03-15T16:05:16.607528181Z" level=fatal msg="Error starting daemon: erro...IVER>)" Mar 15 16:05:16 test systemd[1]: docker.service: main process exited, code=exited, status=1/FAILURE Mar 15 16:05:16 test systemd[1]: Failed to start Docker Application Container Engine. Mar 15 16:05:16 test systemd[1]: Unit docker.service entered failed state. Hint: Some lines were ellipsized, use -l to show in full. Now... Using: DOCKER_OPTIONS='-H tcp://0.0.0.0:2376 -H unix:///var/run/docker.sock --storage-driver overlay --tlsverify -tlscacert /etc/docker/ca.pem --tlscert /etc/docker/server.pem --tlskey /etc/docker/server-key.pem --label provider=generic' Works perfectly fine. I want to bring this to atomic-devel's attention since I don't know if there is something that we can improve on our end (put env variables in curly braces when specifying them in systemd? ex. ${OPTIONS}). Since /usr/lib/ is managed by rpm-ostree. The reason for bringing this up is since I'm working on a generic driver for atomic hosts upstream on docker-machine. Seems that the generic driver they have for rhel-based OS' over there uses this type of param output :) Another thing to note is that docker-machine and docker's recommended env variable is DOCKER_OPTS rather than what we have (I think $OPTIONS within systemd for our first line?) -- Charlie Drage Red Hat - OSAS Team / Project Atomic 4096R / 0x9B3B446C http://pgp.mit.edu/pks/lookup?op=get&search=0x622CDF119B3B446C
