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Docker

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网易镜像 https://c.163yun.com/hub#/m/home/

修改数据源

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chmod a+w /etc/sysconfig/docker
## 增加 ADD_REGISTRY='--add-registry hub.c.163.com'

基本命令

image

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docker image ls

docker

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docker container ls -a
CONTAINER ID        IMAGE                         COMMAND               CREATED             STATUS              PORTS                   NAMES
f7c2d84561dd        hub.c.163.com/public/centos   "/usr/sbin/sshd -D"   7 minutes ago       Up 7 minutes        0.0.0.0:32768->22/tcp   centos

docker exec -it centos /bin/bash

文件拷贝

  1. 本地copy文件到container
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docker cp ~/putMerge.jar hadoop0:~/
  1. container文件copy到本地
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docker cp hadoop0:~/putMerge.jar ~/
  1. images 重命名
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docker tag IMAGEID(镜像id) REPOSITORY:TAG（仓库：标签）

#例子
docker tag ca1b6b825289 reffs/xxxxxxx:v1.0
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yum list installed | grep docker
卸载：

yum -y remove docker.x86_64
重装：

yum install docker-io
启动：

service docker start

Docker 核心基础技术

  • Namespace
  • cgroup

linux Namespace

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setns(fd,..)
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ls -l /proc/1/ns

ll /proc/1/ns/
total 0
lrwxrwxrwx 1 root root 0 Jun  5 15:20 cgroup -> cgroup:[4026531835]
lrwxrwxrwx 1 root root 0 Jun  5 15:20 ipc -> ipc:[4026531839]
lrwxrwxrwx 1 root root 0 Apr 15 19:28 mnt -> mnt:[4026531840]
lrwxrwxrwx 1 root root 0 Apr 15 19:28 net -> net:[4026531957]
lrwxrwxrwx 1 root root 0 Jun  5 15:20 pid -> pid:[4026531836]
lrwxrwxrwx 1 root root 0 Apr 15 16:20 uts -> uts:[4026531838]

cgroup 子系统

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lssubsys -m

lssubsys -m
cpuset /sys/fs/cgroup/cpuset
cpu,cpuacct /sys/fs/cgroup/cpu,cpuacct
memory /sys/fs/cgroup/memory
devices /sys/fs/cgroup/devices
freezer /sys/fs/cgroup/freezer
net_cls /sys/fs/cgroup/net_cls
blkio /sys/fs/cgroup/blkio
perf_event /sys/fs/cgroup/perf_event
hugetlb /sys/fs/cgroup/hugetlb


ls /sys/fs/cgroup/cpu/mytest

cgcreate -g cpu:mytest

M1芯片兼容

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docker build --platform linux/amd64 -t image-name .

国内加速

macOS在docker-desktop的setting中添加:

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"registry-mirrors": [
    "https://mirror.ccs.tencentyun.com",
    "https://dockerhub.woa.com",
    "https://hub-mirror.c.163.com",
    "https://mirror.baidubce.com"
  ]