Difference between revisions of "Docker"
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| + | =Notation= | ||
| + | '''All commands below need to be prepended by "sudo docker":''' | ||
| + | |||
=Location of Image Files= | =Location of Image Files= | ||
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=Basic Commands= | =Basic Commands= | ||
| − | |||
* images | * images | ||
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<pre> | <pre> | ||
sudo docker pull mediawiki | sudo docker pull mediawiki | ||
| + | </pre> | ||
| + | |||
| + | |||
| + | =Examples= | ||
| + | <pre> | ||
| + | run --name some-mediawiki -p 8080:80 -d mediawiki | ||
| + | run --name some-mariadb -e MYSQL_ROOT_PASSWORD=foobar -p 3306:3306 -d mariadb/server | ||
</pre> | </pre> | ||
Revision as of 14:02, 1 May 2019
Contents
Notation
All commands below need to be prepended by "sudo docker":
Location of Image Files
The contents of the /var/lib/docker directory vary depending on the driver Docker is using for storage. By default this will be aufs but can fall back to overlay, overlay2, btrfs, devicemapper or zfs depending on your kernel support. In most places this will be aufs but the RedHats went with devicemapper.
Basic Commands
- images
- rmi (or rmi -f if simple image delete fails)
- ps -a
- container ls
- stop [ -t delay ] my_container
The docker system prune command will remove all stopped containers, all dangling images, and all unused networks:
- system prune
System Configuration
After configuration changes, a restart is usually needed:
sudo service docker restart
In firewall/restricted environments, the following needs to be in the /etc/docker/daemon.json file (put in your specific DNS):
{
"dns":["my.dns.ip.address"]
}
This should work, but in some other cases the file /etc/default/docker may need to be tweaked, specifically the OPTS.
Pulling from the Repo
sudo docker pull mediawiki
Examples
run --name some-mediawiki -p 8080:80 -d mediawiki run --name some-mariadb -e MYSQL_ROOT_PASSWORD=foobar -p 3306:3306 -d mariadb/server
