Nginx http upstream check status

Check upstream server number: 4, generation: 33

Index Upstream Name Status Rise counts Fall counts Check type Check port
0 blog 127.0.0.1:8071 up 4014 0 http 0
1 blog 127.0.0.1:8072 down 0 1572354 http 0
2 web 127.0.0.1:8091 up 20070 0 http 0
3 web 127.0.0.1:8092 down 0 219703 http 0