详解Docker容器跨主机通信的方法_服务器知识

详解Docker容器跨主机通信的方法

2021-02-05 18:04Solinx 服务器知识

本篇文章主要介绍了详解Docker容器跨主机通信的方法，小编觉得挺不错的，现在分享给大家，也给大家做个参考。一起跟随小编过来看看吧

默认情况下docker容器需要跨主机通信两个主机节点都需要在同一个网段下，这时只要两个docker容器的宿主机能相互通信并且该容器使用net网络模式，改实现方式为网桥模式通信；

除此之外我们还可以通过使用第三方工具为不同主机间创建一个覆盖网络，使之能够跨节点通信，这里将使用flanneld实现；

安装etcd

创建 cat /etc/etcd/etcd.conf文件

									# [member]

									 etcd_name=infra1

									 etcd_data_dir="/var/lib/etcd"

									 etcd_listen_peer_urls="http://192.168.2.150:2380"

									 etcd_listen_client_urls="http://192.168.2.150:2379"

									 #[cluster]

									 etcd_initial_advertise_peer_urls="http://192.168.2.150:2380"

									 etcd_initial_cluster_token="etcd-cluster"

									 etcd_advertise_client_urls="http://192.168.2.150:2379"

创建/etc/systemd/system/etcd.service文件

									[unit]

									description=etcd server

									after=network.target

									after=network-online.target

									wants=network-online.target

									documentation=https://github.com/coreos

									[service]

									type=notify

									workingdirectory=/var/lib/etcd/

									environmentfile=-/etc/etcd/etcd.conf

									execstart=/usr/local/bin/etcd \

									 --name ${etcd_name} \

									 --initial-advertise-peer-urls ${etcd_initial_advertise_peer_urls} \

									 --listen-peer-urls ${etcd_listen_peer_urls} \

									 --listen-client-urls ${etcd_listen_client_urls},http://127.0.0.1:2379 \

									 --advertise-client-urls ${etcd_advertise_client_urls} \

									 --initial-cluster-token ${etcd_initial_cluster_token} \

									 --initial-cluster infra1=http://192.168.2.150:2380,infra2=http://192.168.2.151:2380 \

									 --initial-cluster-state new \

									 --data-dir=${etcd_data_dir}

									restart=on-failure

									restartsec=5

									limitnofile=65536

									[install]

									wantedby=multi-user.target

启动systemctl start etcd

在etcd中创建目录：etcdctl --endpoints=http://192.168.2.150:2379,http://192.168.5.151:2379

1	`mkdir` `/kube-centos/network`

创建config节点并写入网络配置信息：

1 2	`etcdctl --endpoints=http://172.20.0.113:2379,http://172.20.0.114:2379` `mk /kube-centos/network/config '{"network":"192.167.0.0/16","subnetlen":24,"backend":{"type":"vxlan"}}'`

flanneld

创建 /etc/sysconfig/flanneld文件

				?

									# flanneld configuration options 

									# etcd url location. point this to the server where etcd runs

									flannel_etcd_endpoints="http://127.0.0.1:2379"

									# etcd config key. this is the configuration key that flannel queries

									# for address range assignment

									# flannel_etcd_prefix="/kube-centos/network"

									flannel_etcd_prefix="/coreos.com/network"

									# any additional options that you want to pass

									flannel_options="-iface=eth0"

创建/usr/lib/systemd/system/flanneld.service文件

				?

									[unit]

									description=flanneld overlay address etcd agent

									after=network.target

									after=network-online.target

									wants=network-online.target

									after=etcd.service

									before=docker.service

									[service]

									type=notify

									environmentfile=/etc/sysconfig/flanneld

									environmentfile=-/etc/sysconfig/docker-network

									#execstart=/usr/bin/flanneld-start $flannel_options

									execstart=/usr/bin/flanneld-start -etcd-endpoints=http://192.168.2.150:2379,http://192.168.2.151:2379 -  iface=ens33

									#execstart=/usr/bin/flanneld-start -etcd-endpoints=http://192.168.2.150:2379,http://192.168.2.151:2379 -etcd-  prefix=/kube-centos/network

									execstartpost=/usr/libexec/flannel/mk-docker-opts.sh -k docker_network_options -d /run/flannel/docker

									restart=on-failure

									[install]

									wantedby=multi-user.target

									requiredby=docker.service