更新nginx版本upstream升级http1.1解决多TIME_WAIT问题

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~]# netstat -n | awk '/^tcp/ {++S[$NF]} END {for(a in S) print a, S[a]}' 
TIME_WAIT 4554
CLOSE_WAIT 1
SYN_SENT 2
ESTABLISHED 1043
SYN_RECV 1

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upstream backend_abc {
    server   192.168.1.34:8086 weight=1 max_fails=2 fail_timeout=10s;
    server   192.168.1.77:8086 weight=1 max_fails=2 fail_timeout=10s;
    keepalive 16;
}

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server {
        listen       80;
        ....
  location / {
            proxy_pass         http://backend_abc;
            proxy_http_version 1.1;
            proxy_redirect     off;
            proxy_set_header Connection "";
            ....
  }

    }