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 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

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 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"

[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

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