新建一个过期时间为300s的租约
# etcdctl lease grant 120 lease 018f6d7bb11aba0d granted with TTL(120s)
查看租约信息
# etcdctl lease list found 1 leases 018f6d7bb11aba0d
# etcdctl lease timetolive 018f6d7bb11aba0d --keys
lease 018f6d7bb11aba0d granted with TTL(120s), remaining(99s), attached keys([])
新建一个key，并为该key指定租约
# etcdctl put name alice --lease="018f6d7bb11aba0d" OK # etcdctl put name1 tina --lease="018f6d7bb11aba0d" OK
# etcdctl lease timetolive 018f6d7bb11aba0d --keys
lease 018f6d7bb11aba0d granted with TTL(120s), remaining(60s), attached keys([name name1])
# etcdctl get --prefix ""
name
alice
name1
tina
等到租约过期后，再次查看租约已经过期，对应的key也已经被自动删除
# etcdctl lease timetolive 018f6d7bb11aba0d --keys
lease 018f6d7bb11aba0d already expired
原文：https://www.cnblogs.com/ilifeilong/p/11607738.html