详解Docker容器跨主机通信的方法

# [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"

[Unit]Description=Etcd ServerAfter=network.targetAfter=network-online.targetWants=network-online.targetDocumentation=https://github.com/coreos[Service]Type=notifyWorkingDirectory=/var/lib/etcd/EnvironmentFile=-/etc/etcd/etcd.confExecStart=/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-failureRestartSec=5LimitNOFILE=65536[Install]WantedBy=multi-user.target

mkdir /kube-centos/network

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 configuration options # etcd url location. Point this to the server where etcd runsFLANNEL_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 passFLANNEL_OPTIONS="-iface=eth0"

[Unit]Description=Flanneld overlay address etcd agentAfter=network.targetAfter=network-online.targetWants=network-online.targetAfter=etcd.serviceBefore=docker.service[Service]Type=notifyEnvironmentFile=/etc/sysconfig/flanneldEnvironmentFile=-/etc/sysconfig/docker-network#ExecStart=/usr/bin/flanneld-start $FLANNEL_OPTIONSExecStart=/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/networkExecStartPost=/usr/libexec/flannel/mk-docker-opts.sh -k DOCKER_NETWORK_OPTIONS -d /run/flannel/dockerRestart=on-failure[Install]WantedBy=multi-user.targetRequiredBy=docker.service

EnvironmentFile=/run/flannel/subnet.env--bip=${FLANNEL_SUBNET} --ip-masq=${FLANNEL_IPMASQ} --mtu=${FLANNEL_MTU}