• 官方说明

    • https://docs.docker.com/network/overlay/

      1. You need the following ports open to traffic to and from each Docker host participating on an overlay network:
      2. ● TCP port 2377 for cluster management communications
      3. ● TCP and UDP port 7946 for communication among nodes
      4. ● UDP port 4789 for overlay network traffic

    • 全命令行加端口

      1. firewall-cmd --add-port=2377/tcp --permanent
      2. firewall-cmd --add-port=7946/tcp --permanent
      3. firewall-cmd --add-port 7946/udp --permanent
      4. firewall-cmd --add-port=4789/udp --permanent
      5. firewall-cmd --reload
      6. systemctl restart docker

    • 新增配置文件加端口

      cat << EOF >/etc/firewalld/services/docker_swarm.xml
<?xml version="1.0" encoding="utf-8"?>
<service>
<description>this is docker swarm port</description>
<port protocol="udp" port="4789"/>
<port protocol="udp" port="7946"/>
<port protocol="tcp" port="2377"/>
<port protocol="tcp" port="7946"/>
</service>
EOF

      firewall-cmd --add-service=docker_swarm --permanent
firewall-cmd --reload
systemctl restart docker