1、搭建docker環境 yum install docker lxc libcgroup docker-io bridge-utils vim /etc/docker/daemon.json {   "log-level":"warn",     "runtimes": {         "docker-runc": {             "path": "/usr/libexec/docker/docker-runc-current"         }     },     "add-runtime": "docker-runc=/usr/libexec/docker/docker-runc-current",     "default-runtime": "docker-runc",     "insecure-registries":["127.0.0.1:5000”] #IP為本地倉庫所在的IP } cd /usr/bin ln -s docker-runc-current docker-runc cd /usr/libexec/docker/ ln -s docker-runc-current docker-runc 啟動docker 守護程序 nohup dockerd & 搭建一個本地倉庫 docker run -d -p 5000:5000   -v /data/docker/images:/var/lib/registry --name registry --restart=always registry -p 指定埠 -v 指定物理服務與docker環境的對應目錄  —name  指定倉庫名 —restart  重啟容器   2、建立映象 docker build  —build-arg key=valoune -t tagname . Dockerfile 編寫 FROM image name ENV 設定環境變數 RUN 執行指令碼 VOLUME 設定邏輯卷 CMD  映象啟動時執行的指令碼     4、docker跨主機的容器通訊（Flannel） 主機1 停用防火牆 systemctl disable firewall.service systemctl stop firewall.service 安裝etcd yum install etcd -y cp /etc/etcd/etcd.conf /etc/etcd/etcd.conf.bak 編輯etcd.conf #[Member] #ETCD_CORS="" ETCD_DATA_DIR="/var/lib/etcd/default.etcd” #資料存放位置 #ETCD_WAL_DIR="" #ETCD_LISTEN_PEER_URLS=" http://localhost:2380”   ETCD_LISTEN_CLIENT_URLS=" http://0.0.0.0:2379,http://0.0.0.0:4001”  #監聽客戶端地址 #ETCD_MAX_SNAPSHOTS="5" #ETCD_MAX_WALS="5" ETCD_NAME=master   #節點名稱 #ETCD_SNAPSHOT_COUNT="100000" #ETCD_HEARTBEAT_INTERVAL="100" #ETCD_ELECTION_TIMEOUT="1000" #ETCD_QUOTA_BACKEND_BYTES="0" #ETCD_MAX_REQUEST_BYTES="1572864" #ETCD_GRPC_KEEPALIVE_MIN_TIME="5s" #ETCD_GRPC_KEEPALIVE_INTERVAL="2h0m0s" #ETCD_GRPC_KEEPALIVE_TIMEOUT="20s" # #[Clustering] #ETCD_INITIAL_ADVERTISE_PEER_URLS="

http://localhost:2380" ETCD_ADVERTISE_CLIENT_URLS=" http://172.0.0.1:2379”    #通知客戶端地址 #ETCD_DISCOVERY="" #ETCD_DISCOVERY_FALLBACK="proxy" #ETCD_DISCOVERY_PROXY="" #ETCD_DISCOVERY_SRV="" #ETCD_INITIAL_CLUSTER="default= http://localhost:2380" #ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster" #ETCD_INITIAL_CLUSTER_STATE="new" #ETCD_STRICT_RECONFIG_CHECK="true" #ETCD_ENABLE_V2="true" # #[Proxy] #ETCD_PROXY="off" #ETCD_PROXY_FAILURE_WAIT="5000" #ETCD_PROXY_REFRESH_INTERVAL="30000" #ETCD_PROXY_DIAL_TIMEOUT="1000" #ETCD_PROXY_WRITE_TIMEOUT="5000" #ETCD_PROXY_READ_TIMEOUT="0" # #[Security] #ETCD_CERT_FILE="" #ETCD_KEY_FILE="" #ETCD_CLIENT_CERT_AUTH="false" #ETCD_TRUSTED_CA_FILE="" #ETCD_AUTO_TLS="false" #ETCD_PEER_CERT_FILE="" #ETCD_PEER_KEY_FILE="" #ETCD_PEER_CLIENT_CERT_AUTH="false" #ETCD_PEER_TRUSTED_CA_FILE="" #ETCD_PEER_AUTO_TLS="false" # #[Logging] #ETCD_DEBUG="false" #ETCD_LOG_PACKAGE_LEVELS="" #ETCD_LOG_OUTPUT="default" # #[Unsafe] #ETCD_FORCE_NEW_CLUSTER="false" # #[Version] #ETCD_VERSION="false" #ETCD_AUTO_COMPACTION_RETENTION="0" # #[Profiling] #ETCD_ENABLE_PPROF="false" #ETCD_METRICS="basic" # #[Auth] #ETCD_AUTH_TOKEN=“simple" 啟動etcd systemctl  start etcd 驗證是否成功 ps -ef|grep etcd lsof -i:2379 etcdctl set testdir/testkey0 0 etcdctl get testdir/testkey0 etcdctl -C 

http://172.0.0.1:2379 cluster-health           主機2 安裝Flannel 安裝覆蓋網路Flannel yum install flannel cp /etc/sysconfig/flanneld /etc/sysconfig/flanneld.bak vim /etc/sysconfig/flanneld FLANNEL_ETCD_ENDPOINTS=" http://172.0.0.1:2379” FLANNEL_ETCD_PREFIX="/atomic.io/network” etcdctl mk /atomic.io/network/config '{ "Network": “172.31.1.0/22" }’   託管docker 的docker0 cd /usr/libexec/flannel ./mk-docker-opts.sh source /run/flannel/subnet.env docker daemon --bip=${FLANNEL_SUBNET} --mtu=${FLANNEL_MTU} &   容器之間網路互通 iptables -P INPUT ACCEPT iptables -P FORWARD ACCEPT iptables -F iptables -L -n