etcd使用
1、设置配置
etcdctl put name zhangsan
2、获取配置
etcdctl get name
3、监听配置
etcdctl watch name etcdctl put name lisi

4、续约
##设置约期
etcdctl lease grant 300
##设置配置
etcdctl put host 127.0.0.1 --lease=694d82f1e195f609
##获取配置
etcdctl get host

4.1 过期(300秒后)

4.2 手动续约
##续约 etcdctl lease keep-alive 694d82f1e195f620 ##取消续约 etcdctl lease revoke 694d82f1e195f620
5、分布式锁(Distributed locks)
etcdctl lock key1

6、健康检查
etcdctl endpoint status
etcdctl endpoint health


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