Docker創建 bridge 網絡,創建自定義網絡

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

查看已經存在的網絡

docker network ls

注意：如果設置網絡不生效，查看是使用bin下面的route還是sbin下面的，通過如下命令復制一樣，在啟動的時候可以查看加載網絡配置文件

[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

臨時的靜態路由配置，這樣就都可以保障生效了(192.168.11.0這個是需要范圍的來源ip,192.168.16.1這個是目的地址的官關)

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

設置的永久的靜態路由，在vi /etc/sysconfig/static-routes添加如下(沒有就新增)

any net 192.168.11.0/24 gw 192.168.16.1

命令ip add是查看網絡下有那些網絡使用

[root@localhost ~]# ip add
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:fc:0b:23 brd ff:ff:ff:ff:ff:ff
    inet 192.168.11.47/24 brd 192.168.11.255 scope global noprefixroute ens33
       valid_lft forever preferred_lft forever
    inet6 fd0d:3fd3:f1d::d4a/128 scope global noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 fd0d:3fd3:f1d:0:891f:a630:eae4:dfcc/64 scope global noprefixroute 
       valid_lft forever preferred_lft forever
    inet6 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 1000
    link/ether 52:54:00:c6:57:81 brd ff:ff:ff:ff:ff:ff
    inet 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

如果在嘗試修改 Docker 的配置文件后，設置依然不生效，您可以嘗試以下方法：

停止 Docker 服務：

sudo systemctl stop docker

刪除 docker0 網橋及相關的配置文件：

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

重新啟動網絡服務：

sudo systemctl restart network

重新創建 docker0 網橋并設置新的 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

啟動 Docker 服務：

sudo systemctl start docker

方法二，編輯 Docker 的配置文件 /etc/docker/daemon.json（如果沒有該文件，則創建一個）：

sudo nano /etc/docker/daemon.json

在文件中添加以下內容（假設您要將 docker0 的 IP 地址設置為 192.168.100.1/24）：

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

保存并關閉文件

重新啟動 Docker 服務：

sudo systemctl restart docker