Docker implemented in around 100 lines of bash.

• Prerequisites
• Example Usage
• Functionality: Currently Implemented
• Functionality: Not Yet Implemented
• License

The following packages are needed to run bocker.

• btrfs-progs
• curl
• iproute2
• iptables
• libcgroup-tools
• util-linux >= 2.25.2
• coreutils >= 7.5

Because most distributions do not ship a new enough version of util-linux you will probably need to grab the sources from here and compile it yourself.

Additionally your system will need to be configured with the following:

• A btrfs filesystem mounted under /var/bocker
• A network bridge called bridge0 and an IP of 10.0.0.1/24
• IP forwarding enabled in /proc/sys/net/ipv4/ip_forward
• A firewall routing traffic from bridge0 to a physical interface.

For ease of use a Vagrantfile is included which will build the needed environment.

Even if you meet the above prerequisites you probably still want to run bocker in a virtual machine. Bocker runs as root and among other things needs to make changes to your network interfaces, routing table, and firewall rules. I can make no guarantees that it won't trash your system.

$ bocker pull centos 7 ######################################################################## 100.0% ######################################################################## 100.0% ######################################################################## 100.0% Created: img_42150 $ bocker images IMAGE_ID SOURCE img_42150 centos:7 $ bocker run img_42150 cat /etc/centos-release CentOS Linux release 7.1.1503 (Core) $ bocker ps CONTAINER_ID COMMAND ps_42045 cat /etc/centos-release $ bocker logs ps_42045 CentOS Linux release 7.1.1503 (Core) $ bocker rm ps_42045 Removed: ps_42045 $ bocker run img_42150 which wget which: no wget in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin) $ bocker run img_42150 yum install -y wget Installing : wget-1.14-10.el7_0.1.x86_64 1/1 Verifying : wget-1.14-10.el7_0.1.x86_64 1/1 Installed : wget.x86_64 0:1.14-10.el7_0.1 Complete! $ bocker ps CONTAINER_ID COMMAND ps_42018 yum install -y wget ps_42182 which wget $ bocker commit ps_42018 img_42150 Removed: img_42150 Created: img_42150 $ bocker run img_42150 which wget /usr/bin/wget $ bocker run img_42150 cat /proc/1/cgroup ... 4:memory:/ps_42152 3:cpuacct,cpu:/ps_42152 $ cat /sys/fs/cgroup/cpu/ps_42152/cpu.shares 512 $ cat /sys/fs/cgroup/memory/ps_42152/memory.limit_in_bytes 512000000 $ BOCKER_CPU_SHARE=1024 \ BOCKER_MEM_LIMIT=1024 \ bocker run img_42150 cat /proc/1/cgroup ... 4:memory:/ps_42188 3:cpuacct,cpu:/ps_42188 $ cat /sys/fs/cgroup/cpu/ps_42188/cpu.shares 1024 $ cat /sys/fs/cgroup/memory/ps_42188/memory.limit_in_bytes 1024000000 

• docker build †
• docker pull
• docker images
• docker ps
• docker run
• docker exec
• docker logs
• docker commit
• docker rm / docker rmi
• Networking
• Quota Support / CGroups

† bocker init provides a very limited implementation of docker build

• Data Volume Containers
• Data Volumes
• Port Forwarding

Copyright (C) 2015 Peter Wilmott

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/.