服务雪崩、降级与熔断

服务雪崩、降级与熔断：https://mp.weixin.qq.com/s?__biz=MzAxNjk4ODE4OQ==&mid=2247485781&idx=1&sn=8e23e1ca1803b8134097152dd9cc4af7&chksm=9bed2827ac9aa13128981075470b013f9f41e593b2a11c13bdd6521ede7e72b08abe2a2a2ac8&scene=0&xtrack=1&key=864f666bf0545584e1124e543625c424cc712ca1e6117345227ce43c008e49120baa6e6e7d47a9bd47b528d7996c3d4f04dc72dbeb92f93e50e441d54c0428c388016f9e2e69d8345811f0a16177eccc&ascene=14&uin=MTkwNjk4NjAxMA%3D%3D&devicetype=Windows+10&version=62060833&lang=zh_CN&pass_ticket=JogDaVDjKXx9W3zQZ2sl6TAUdMDS7rKA0Zb9hMwwVMC4ALxeAySdvq8JADMCeINW