09 Docker容器单机网络架构全攻略：从IP地址到路由的全面解析 一 docker网络学习基础 1.1 拉取 alpine 镜像 1.2 运行容器 1.3 进入容器终端 1.4 连接到正在运行中的容器 1.5 查看容器的ip地址 1.6 查看容器的路由

09 Docker容器单机网络架构全攻略：从IP地址到路由的全面解析

一 docker网络学习基础

1.1 拉取 alpine 镜像

[superman@docker ~]$ docker pull alpine

示例：

[superman@docker ~]
$ docker pull alpine


Using default tag: latest


latest: Pulling from library/alpine


59bf1c3509f3: Pull complete 


Digest: sha256:21a3deaa0d32a8057914f36584b5288d2e5ecc984380bc0118285c70fa8c9300


Status: Downloaded newer image 
for alpine:latest


docker.io/library/alpine:latest


[superman@docker ~]
$ 


[superman@docker ~]
$ docker images


REPOSITORY       TAG       IMAGE ID       CREATED       SIZE


httpd_superman   
1.0       f0d394fd69d5   
13 days ago   144MB


tomcat           latest    fb5657adc892   
2 years ago   680MB


httpd            
2.4       dabbfbe0c57b   
2 years ago   144MB


httpd            latest    dabbfbe0c57b   
2 years ago   144MB


alpine           latest    c059bfaa849c   
2 years ago   
5.59MB


[superman@docker ~]
$ 

1.2 运行容器

[superman@docker ~]$ docker run -dit --name superman01 alpine

示例：

[superman@docker ~]
$ docker run 
-dit 
--name superman01 alpine


a2804a814851c7a6316a36ae7c7801b253e133efe9fb5fac3e2999c838e12be1


[superman@docker ~]
$ 


[superman@docker ~]
$ docker 
ps 
-a


CONTAINER ID   IMAGE     COMMAND     CREATED         STATUS         PORTS     NAMES


a2804a814851   alpine    
"/bin/sh"   
8 seconds ago   Up 
7 seconds             superman01


[superman@docker ~]
$ 

1.3 进入容器终端

进入容器终端并且保留容器终端的输入形式。

[superman@docker ~]$ docker exec -it superman01 ash

示例：

[superman@docker ~]
$ docker exec 
-it superman01 ash


/ 
# 


/ 
# ip add list



1: lo: <LOOPBACK,UP,LOWER_UP> mtu 
65536 qdisc noqueue state UNKNOWN qlen 
1000


    link/loopback 
00:00:00:00:00:00 brd 
00:00:00:00:00:00


    inet 
127.0.0.1/8 scope host lo


       valid_lft forever preferred_lft forever



8: eth0@if9: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 
1500 qdisc noqueue state UP 


    link/ether 
02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff


    inet 
172.17.0.2/16 brd 
172.17.255.255 scope global eth0


       valid_lft forever preferred_lft forever


/ 
# 


/ 
# exit


[superman@docker ~]
$

1.4 连接到正在运行中的容器

[superman@docker ~]$ docker attach superman01

示例：

[superman@docker ~]
$ docker attach superman01


/ 
# 


/ 
# ip add list



1: lo: <LOOPBACK,UP,LOWER_UP> mtu 
65536 qdisc noqueue state UNKNOWN qlen 
1000


    link/loopback 
00:00:00:00:00:00 brd 
00:00:00:00:00:00


    inet 
127.0.0.1/8 scope host lo


       valid_lft forever preferred_lft forever



8: eth0@if9: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 
1500 qdisc noqueue state UP 


    link/ether 
02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff


    inet 
172.17.0.2/16 brd 
172.17.255.255 scope global eth0


       valid_lft forever preferred_lft forever


/ 
# 


/ 
# exit


[superman@docker ~]
$

1.5 查看容器的ip地址

[superman@docker ~]$ ip add show

示例：

[superman@docker ~]
$ docker exec 
-it superman01 ash          


/ 
# 


/ 
# ip add show



1: lo: <LOOPBACK,UP,LOWER_UP> mtu 
65536 qdisc noqueue state UNKNOWN qlen 
1000


    link/loopback 
00:00:00:00:00:00 brd 
00:00:00:00:00:00


    inet 
127.0.0.1/8 scope host lo


       valid_lft forever preferred_lft forever



10: eth0@if11: <BROADCAST,MULTICAST,UP,LOWER_UP,M-DOWN> mtu 
1500 qdisc noqueue state UP 


    link/ether 
02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff


    inet 
172.17.0.2/16 brd 
172.17.255.255 scope global eth0


       valid_lft forever preferred_lft forever


/ 
# 


/ 
# exit


[superman@docker ~]
$ 

1.6 查看容器的路由

[superman@docker ~]$ route -n

示例：

[superman@docker ~]
$ docker attach superman01


/ 
# 


/ 
# route -n


Kernel IP routing table


Destination     Gateway         Genmask         Flags Metric Ref    Use Iface



0.0.0.0         
172.17.0.1      
0.0.0.0         UG    
0      
0        
0 eth0



172.17.0.0      
0.0.0.0         
255.255.0.0     U     
0      
0        
0 eth0


/ 
# 


/ 
# exit


[superman@docker ~]
$ 

原文链接： https://mp.weixin.qq.com/s?__biz=MzkxNzI1OTE3Mw==&mid=2247492176&idx=1&sn=4079f10f9996bc79bc49038ae96af39d&chksm=c141f49af6367d8cd0b3a6d25fa63f627652120f93bd0bbe37026e6eb0cbf20baa07bcf43d00&token=2097529203&lang=zh_CN#rd

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