Bocker 详细介绍
Bocker 是一个用大约 100 行代码实现的 Docker。
依赖：
btrfs-progs
curl
iproute2
iptables
libcgroup-tools
util-linux >= 2.25.2
coreutils >= 7.5
基本使用方法：
$ bocker pull centos 7
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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
当前实现的功能：
docker build †
docker pull
docker images
docker ps
docker run
docker exec
docker logs
docker commit
docker rm / docker rmi
Networking
Quota Support / CGroups
文章转载自 开源中国社区[https://www.oschina.net]
