#修改配置文件
vi /usr/lib/systemd/system/docker.service

[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.com
After=network.target
Wants=docker-storage-setup.service
Requires=docker-cleanup.timer

[Service]
Type=notify
NotifyAccess=all
KillMode=process
#添加我们自定义的配置文件
EnvironmentFile=-/etc/default/docker #添加配置文件，（-代表ignore error）
EnvironmentFile=-/etc/sysconfig/docker
EnvironmentFile=-/etc/sysconfig/docker-storage
EnvironmentFile=-/etc/sysconfig/docker-network
Environment=GOTRACEBACK=crash
Environment=DOCKER_HTTP_HOST_COMPAT=1
Environment=PATH=/usr/libexec/docker:/usr/bin:/usr/sbin
ExecStart=/usr/bin/dockerd-current      --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current      --default-runtime=docker-runc      --exec-opt native.cgroupdriver=systemd      --userland-proxy-path=/usr/libexec/docker/docker-proxy-current      $OPTIONS      $DOCKER_STORAGE_OPTIONS      $DOCKER_NETWORK_OPTIONS      $ADD_REGISTRY      $BLOCK_REGISTRY      $INSECURE_REGISTRY      $DOCKER_OPTS #需要引用的参数，也是网卡设定参数
ExecReload=/bin/kill -s HUP $MAINPID
LimitNOFILE=1048576
LimitNPROC=1048576
LimitCORE=infinity
TimeoutStartSec=0
Restart=on-abnormal
MountFlags=slave

[Install]
WantedBy=multi-user.target
EnvironmentFile=-/etc/default/docker

#重载
systemctl daemon-reload
#重启docker服务
service docker restart 

vi /etc/sysconfig/docker
DOCKER_OPTS="-b=br0"

#或者直接写数据
 echo 'DOCKER_OPTS="-b=br0"'  /etc/default/docker

#安装网桥工具
yum install bridge-utils 

#添加网桥
brctl addbr br0

#查看网桥
brctl show 

#设定网桥地址和子网掩码
ifconfig br0 192.168.110.1 netmask 255.255.255.0

#设定网桥
echo 'DOCKER_OPTS="-b=br0"'  /etc/default/docker

#配置docker
vi /usr/lib/systemd/system/docker.service
#添加我们自己的配置文件
EnvironmentFile=-/etc/sysconfig/docker
#应用参数
ExecStart=/usr/bin/dockerd-current         --add-runtime docker-runc=/usr/libexec/docker/docker-runc-current         --default-runtime=docker-runc         --exec-opt native.cgroupdriver=systemd         --userland-proxy-path=/usr/libexec/docker/docker-proxy-current         $OPTIONS         $DOCKER_STORAGE_OPTIONS         $DOCKER_NETWORK_OPTIONS         $ADD_REGISTRY         $BLOCK_REGISTRY         $INSECURE_REGISTRY         $DOCKER_OPTS #添加网桥的参数

#重载
systemctl daemon-reload
#重启docker服务
service docker restart