Docker创建 bridge 网络,创建自定义网络

docker network create --driver bridge --subnet 172.18.0.0/16 kafka_network

查看已经存在的网络

docker network ls

注意：如果设置网络不生效，查看是使用bin下面的route还是sbin下面的，通过如下命令复制一样，在启动的时候可以查看加载网络配置文件

[root@localhost ~]# tail -f /var/log/messages
Feb 28 11:48:12 localhost systemd: boot-init-muranoagent.service: main process exited, code=exited, status=1/FAILURE
Feb 28 11:48:12 localhost systemd: Unit boot-init-muranoagent.service entered failed state.
Feb 28 11:48:12 localhost systemd: boot-init-muranoagent.service failed.
Feb 28 11:49:01 localhost systemd: Stopping LSB: Bring up/down networking...
Feb 28 11:49:01 localhost network: Shutting down interface eth0:  [  OK  ]
Feb 28 11:49:01 localhost network: Shutting down loopback interface:  [  OK  ]
Feb 28 11:49:01 localhost systemd: Stopped LSB: Bring up/down networking.
Feb 28 11:49:01 localhost systemd: Starting LSB: Bring up/down networking...
Feb 28 11:49:01 localhost network: Bringing up loopback interface:  [  OK  ]
Feb 28 11:49:05 localhost network: Bringing up interface eth0:  Error: inet6 prefix is expected rather than "192.168.11.0/24".
Feb 28 11:49:10 localhost network: [  OK  ]
Feb 28 11:49:10 localhost systemd: Started LSB: Bring up/down networking.
Feb 28 11:53:12 localhost systemd: boot-init-muranoagent.service holdoff time over, scheduling restart.
Feb 28 11:53:12 localhost systemd: Stopped boot app-center Murano-agent Service.
Feb 28 11:53:12 localhost systemd: Started boot app-center Murano-agent Service.
Feb 28 11:55:30 localhost systemd: boot-init-muranoagent.service: main process exited, code=exited, status=1/FAILURE
Feb 28 11:55:30 localhost systemd: Unit boot-init-muranoagent.service entered failed state.
Feb 28 11:55:30 localhost systemd: boot-init-muranoagent.service failed.

[root@localhost ~]# which is route
/usr/bin/which: no is in (/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/usr/jdk/bin:/root/bin)
/usr/sbin/route
[root@localhost ~]# 

[root@localhost ~]# cp /bin/route /sbin/route

临时的静态路由配置，这样就都可以保障生效了(192.168.11.0这个是需要范围的来源ip,192.168.16.1这个是目的地址的官关)

[root@localhost ~]# route add -net  192.168.11.0 netmask 255.255.255.0 gw 192.168.16.1

设置的永久的静态路由，在vi /etc/sysconfig/static-routes添加如下(没有就新增)

any net 192.168.11.0/24 gw 192.168.16.1

命令ip add是查看网络下有那些网络使用

[root@localhost ~]# ip add
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::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 1000link/ether 00:0c:29:fc:0b:23 brd ff:ff:ff:ff:ff:ffinet 192.168.11.47/24 brd 192.168.11.255 scope global noprefixroute ens33valid_lft forever preferred_lft foreverinet6 fd0d:3fd3:f1d::d4a/128 scope global noprefixroute valid_lft forever preferred_lft foreverinet6 fd0d:3fd3:f1d:0:891f:a630:eae4:dfcc/64 scope global noprefixroute valid_lft forever preferred_lft foreverinet6 fe80::1a74:c189:72b3:230b/64 scope link noprefixroute valid_lft forever preferred_lft forever
3: virbr0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc noqueue state DOWN group default qlen 1000link/ether 52:54:00:c6:57:81 brd ff:ff:ff:ff:ff:ffinet 192.168.122.1/24 brd 192.168.122.255 scope global virbr0

rout -n

[root@localhost ~]# route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
0.0.0.0         192.168.11.1    0.0.0.0         UG    100    0        0 ens33
172.17.0.0      0.0.0.0         255.255.0.0     U     0      0        0 docker0
192.168.11.0    0.0.0.0         255.255.255.0   U     100    0        0 ens33
192.168.122.0   0.0.0.0         255.255.255.0   U     0      0        0 virbr0

docker network ls

[root@localhost ~]# docker network ls
NETWORK ID          NAME                DRIVER              SCOPE
c1006322fec2        bridge              bridge              local
1deaea80c25a        host                host                local
e214db33d8f7        none                null                local

如果在尝试修改 Docker 的配置文件后，设置依然不生效，您可以尝试以下方法：

停止 Docker 服务：

sudo systemctl stop docker

删除 docker0 网桥及相关的配置文件：

sudo ip link set dev docker0 down
sudo brctl delbr docker0
sudo rm -rf /var/lib/docker/network/files/*

重新启动网络服务：

sudo systemctl restart network

重新创建 docker0 网桥并设置新的 IP 地址：

sudo brctl addbr docker0
sudo ip addr add 192.168.100.1/24 dev docker0
sudo ip link set dev docker0 up

启动 Docker 服务：

sudo systemctl start docker

方法二，编辑 Docker 的配置文件 /etc/docker/daemon.json（如果没有该文件，则创建一个）：

sudo nano /etc/docker/daemon.json

在文件中添加以下内容（假设您要将 docker0 的 IP 地址设置为 192.168.100.1/24）：

json
{"bip": "192.168.100.1/24"
}

保存并关闭文件

重新启动 Docker 服务：

sudo systemctl restart docker