一、建立集群
1、在每台机器上建立环境变量
TOKEN=token-01 CLUSTER_STATE=new NAME_1=machine-1 NAME_2=machine-2 NAME_3=machine-3 HOST_1=10.240.0.17 HOST_2=10.240.0.18 HOST_3=10.240.0.19 CLUSTER=${NAME_1}=http://${HOST_1}:2380,${NAME_2}=http://${HOST_2}:2380,${NAME_3}=http://${HOST_3}:23802、在每台机器上运行如下命令
# For machine 1 THIS_NAME=${NAME_1} THIS_IP=${HOST_1} etcd --data-dir=data.etcd --name ${THIS_NAME} \ --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380 \ --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379 \ --initial-cluster ${CLUSTER} \ --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}
# For machine 2 THIS_NAME=${NAME_2} THIS_IP=${HOST_2} etcd --data-dir=data.etcd --name ${THIS_NAME} \ --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380 \ --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379 \ --initial-cluster ${CLUSTER} \ --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}
# For machine 3 THIS_NAME=${NAME_3} THIS_IP=${HOST_3} etcd --data-dir=data.etcd --name ${THIS_NAME} \ --initial-advertise-peer-urls http://${THIS_IP}:2380 --listen-peer-urls http://${THIS_IP}:2380 \ --advertise-client-urls http://${THIS_IP}:2379 --listen-client-urls http://${THIS_IP}:2379 \ --initial-cluster ${CLUSTER} \ --initial-cluster-state ${CLUSTER_STATE} --initial-cluster-token ${TOKEN}3、连接测试
export ETCDCTL_API=3 HOST_1=10.240.0.17 HOST_2=10.240.0.18 HOST_3=10.240.0.19 ENDPOINTS=$HOST_1:2379,$HOST_2:2379,$HOST_3:2379 etcdctl --endpoints=$ENDPOINTS member list
etcdctl --endpoints=$ENDPOINTS put foo "Hello World!"
etcdctl --endpoints=$ENDPOINTS get foo etcdctl --endpoints=$ENDPOINTS --write-out="json" get foo===选举
etcdctl --endpoints=$ENDPOINTS elect one p1 # another client with the same name blocks etcdctl --endpoints=$ENDPOINTS elect one p2
==分布式锁 etcdctl --endpoints=$ENDPOINTS lock mutex1 # another client with the same name blocks etcdctl --endpoints=$ENDPOINTS lock mutex1==查看集群状态
etcdctl --write-out=table --endpoints=$ENDPOINTS endpoint status
etcdctl --endpoints=$ENDPOINTS endpoint health
==快照 ENDPOINTS=$HOST_1:2379 etcdctl --endpoints=$ENDPOINTS snapshot save my.db==升级
# write key in etcd version 2 store export ETCDCTL_API=2 etcdctl --endpoints=http://$ENDPOINT set foo bar # read key in etcd v2 etcdctl --endpoints=$ENDPOINTS --output="json" get foo # stop etcd node to migrate, one by one # migrate v2 data export ETCDCTL_API=3 etcdctl --endpoints=$ENDPOINT migrate --data-dir="default.etcd" --wal-dir="default.etcd/member/wal" # restart etcd node after migrate, one by one # confirm that the key got migrated etcdctl --endpoints=$ENDPOINTS get /foo
来源：博客园
作者：FromScratch
链接：https://www.cnblogs.com/justart/p/11670845.html