61 lines
1.9 KiB
Markdown
61 lines
1.9 KiB
Markdown
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page_title: Configuring Docker
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page_description: Configuring the Docker daemon on various distributions
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page_keywords: docker, daemon, configuration
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# Configuring Docker on various distributions
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After successfully installing the Docker daemon on a distribution, it runs with it's default
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config. Usually it is required to change the default config to meet one's personal requirements.
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Docker can be configured by passing the config flags to the daemon directly if the daemon
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is started directly. Usually that is not the case. A process manager (like SysVinit, Upstart,
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systemd, etc) is responsible for starting and running the daemon.
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Some common config options are
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* `-D` : Enable debug mode
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* `-H` : Daemon socket(s) to connect to
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* `--tls` : Enable or disable TLS authentication
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The complete list of flags can found at [Docker Command Line Reference](/reference/commandline/cli/)
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## Ubuntu
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After successfully [installing Docker for Ubuntu](/installation/ubuntulinux/), you can check the
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running status using (if running Upstart)
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$ sudo status docker
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docker start/running, process 989
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You can start/stop/restart `docker` using
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$ sudo start docker
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$ sudo stop docker
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$ sudo restart docker
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### Configuring Docker
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Docker options can be configured by editing the file `/etc/default/docker`. If this file does not
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exist, it needs to be createdThis file contains a variable named `DOCKER_OPTS`. All the
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config options need to be placed in this variable. For example
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DOCKER_OPTS=" --dns 8.8.8.8 -D --tls=false -H tcp://0.0.0.0:2375 "
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The above daemon options :
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1. Set dns server for all containers
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2. Enable Debug mode
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3. Set tls to false
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4. Make the daemon listen for connections on `tcp://0.0.0.0:2375`
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After saving the file, restart docker using `sudo restart docker`. Verify that the daemon is
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running with the options specified by running `ps aux | grep docker | grep -v grep`
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