docker网络

1、服务器开机
ifconfig
ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.106  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::2ecd:bc25:b2cf:8ef2  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:ac:e2:8f  txqueuelen 1000  (Ethernet)
        RX packets 114  bytes 13572 (13.2 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 115  bytes 15020 (14.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
2、开启docker守护进程
systemctl start docker
ifconfig
docker0: flags=4099<UP,BROADCAST,MULTICAST>  mtu 1500　　
        inet 172.17.0.1  netmask 255.255.0.0  broadcast 172.17.255.255　　docker0 ----> 172.17.0.1 ---->docker网关
        ether 02:42:80:38:9f:d0  txqueuelen 0  (Ethernet)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

ens33: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.0.106  netmask 255.255.255.0  broadcast 192.168.0.255
        inet6 fe80::2ecd:bc25:b2cf:8ef2  prefixlen 64  scopeid 0x20<link>
        ether 00:0c:29:ac:e2:8f  txqueuelen 1000  (Ethernet)
        RX packets 210  bytes 21852 (21.3 KiB)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 174  bytes 22156 (21.6 KiB)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0

lo: flags=73<UP,LOOPBACK,RUNNING>  mtu 65536
        inet 127.0.0.1  netmask 255.0.0.0
        inet6 ::1  prefixlen 128  scopeid 0x10<host>
        loop  txqueuelen 1000  (Local Loopback)
        RX packets 0  bytes 0 (0.0 B)
        RX errors 0  dropped 0  overruns 0  frame 0
        TX packets 0  bytes 0 (0.0 B)
        TX errors 0  dropped 0 overruns 0  carrier 0  collisions 0
3、启动一个容器        
docker run -d tomcat:jdk8
ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 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
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP group default qlen 1000
    link/ether 00:0c:29:ac:e2:8f brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.106/24 brd 192.168.0.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fe80::2ecd:bc25:b2cf:8ef2/64 scope link noprefixroute
       valid_lft forever preferred_lft forever
3: docker0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 02:42:69:7a:b3:0c brd ff:ff:ff:ff:ff:ff
    inet 172.17.0.1/16 brd 172.17.255.255 scope global docker0
       valid_lft forever preferred_lft forever
    inet6 fe80::42:69ff:fe7a:b30c/64 scope link
       valid_lft forever preferred_lft forever
9: : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master docker0 state UP group default 　每添加一个容器，宿主机就分配一个容器网卡
    link/ether b2:05:0b:05:51:12 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet6 fe80::b005:bff:fe05:5112/64 scope link
       valid_lft forever preferred_lft forever


容器内执行ip addr
docker exec -it 5ef7ccd3e8be ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default 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: : <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 02:42:ac:11:00:02 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.17.0.2/16 brd 172.17.255.255 scope global eth0
       valid_lft forever preferred_lft forever