Docker Basic Learning

Basic Command Learning

1,docker Search CentOS # #搜索镜像文件

2,docker Pull CentOS # #下载镜像

3,docker Images # #查看镜像

4,docker run Centos/bin/echo ' Hello World ' # #启动一个容器

5,docker Ps-a # #查看容器包括启动和停止的容器

6,docker run--name mydocker-it Centos/bin/bash # #进入容器内部

7, IP ad li # #查看ip地址

8,docker run-d--name mydocker CentOS # #后台启动容器

9,nsenter (yum-y install util-linux) # #使用这个命令通过容器 PID into the container

Docker Inspect--format "{{. State.pid}} "Mydocker (name or container id) 3575 # #取得容器的PID号

10,nsenter--target 3575--mount--uts--ipc--net--pid # #进入容器

To enter the container script:

#!/bin/bash

Cname=$1

Cpid= ' Docker inspect--format ' {{. State.pid}} "$CNAME"

Nsenter--target "$CPID"--mount--uts--ipc--net--pid

Network access:

1, brctl show # #会发现一个docker0的网桥

2, IP ro li # #查看路由

3, Network port mapping:

Random mapping:

Docker-d-P--name mynginx nginx

Docker ps-l# #查看最近的一个容器操作

Onds 0.0.0.0:32769->80/tcp,0.0.0.0:32768->443/tcp Mynginx # #容器的80端口映射到物理机的32769

Specify the mappings:

Docker-d-P 91:80--name mynginx1 nginx # #91是映射后的端口, 80 is the default port in the container

-P Ip:hostPort:containerPost # #ip地址端口 + container port

-P Ip::containerport # #iP + container port

-P hostport:containerport-p Hostport:containerpor # #指定多个端口

Docker Data management:

Data Volume:-v/data

Docker run-it--name volume-test1-h centos-v/data CentOS # #在容器里会生成一个/data Directory

Docker Inspect-f {{. Volumes}} Volume-test1 # #查看数据目录映射关系

Specify directory:-v SRC:DST

Docker run-it--name volume-test2-h centos-v/opt:/opt (: Ro Read only) CentOS # #物理机的/opt map to Container/opt

Docker run-it--rm CentOS # #此镜像为测试镜像关闭后自动清楚

Data Volume Container:

Docker run-it--name volume-test3--volumes-from volume-test1 CentOS # #指定容器1, for data volumes

Docker Image build:

Build manually:

1,nginx plus daemon off; Turn off Nginx background run and set the boot/etc/rc.d/rc.local

2,docker commit-m "My_nginx" 023d0bc923a9 dihaifeng/my_nginx:v1 # #将容器制作成镜像

3,docker run-d-P 99:80 Dihaifeng/my_nginx:v1/usr/local/nginx/sbin/nginx

Dockfile:

1, base image Information 2, maintainer information 3, mirror operation instruction 4, container start execution instruction

1, create the Dockerfile directory

Mkdir-p/opt/docker-file/nginx

Vim Dockerfile # #docker的D必须大写

Dockerfile directive:

From: Who is it's mother (base image)

Maintainer: Tell someone that you created it (maintainer information)

ADD: Put some files in his belly (copy file, will be automatically extracted, must and Dockerfile in a directory)

Run: What do you want it to do (add the command in front of the run)

Workdir: I'm a CD, I just made makeup today (current working directory)

VOLUME: Give me a place to store my luggage (catalogue mount)

EXPOSE: What is the door I want to open (port)

Run: Run, brother! (process continues to run)

To configure DOCKERFLE environment variables:

ENV Path=/usr/local/nginx/sbin: $PATH

CMD ["Nginx"]

Docker build-t nginx-file:v1/opt/docker-file/nginx/# #自动构建dockerfile

Docker Core Technology:

Docker resource isolation: Using Linux LXC, using kernel namespace (namespaces: Pid, Net, IPC, MNT, UTS, user)

Docker resource limit: Use Cgroup, support CPU, memory

Tools for stress Testing: stress

CPU test:

Docker run-it--rm stress--cpu 1 # #开一个容器测试cpu占用率

Docker run-it--rm-c stress-cpu 1 # #有几个CPU指定几, CPU quota test, not specified by default is half-divided

Docker run-it--rm--cpuset-cpus=0,1 Stress--cpu 2 # #只会占用一个CPU

Memory test:

Docker run-it--rm-m 128m stress--vm 1--vm-bytes 120m--vm-hang 0

Docker Network mode: The default is Bridge mode. Docker-compose # #构建多个镜像

Docker-registry Private Warehouse:

Docker Pull Registry

Docker run-d-P 5001:5000 Registry # #registry默认是5000端口

Docker tag Nginx 192.168.10.110:5001/test/nginx:v1 # #打标签

Docker Push 192.168.10.110:5001/test/nginx:v1 # #打完标签可以push到私有仓库中, the new version will error, to use the way HTTPS,

Modify/etc/sysconfig/docker---> other_args= "--insecure-registry 192.168.10.110:5001" to restart Docker, you can push.

Docker Dashboard (Shipyard):

1,vim/etc/sysconfig/docker

other_args= "-H tcp://0.0.0.0:235-h unix:///var/run/docker.sock" # #容器之间通信

/etc/init.d/docker Restart #重新加载docker

2, install shipyard

Docker run-it-d--name shipyard-rethinkdb-data--entrypoint/bin/bash shipyard/rethinkdb-l

This article is from the "Henry" blog, please be sure to keep this source http://dihaifeng.blog.51cto.com/8814208/1713512

Docker Basic Learning