在咱们日常应用高可用集群时，都会应用到负载平衡工具对多个节点的负载进行转发。这里就不得不提到咱们罕用的一个负载平衡工具Nginx，Nginx官网提供的收费版本性能绝对简略，大部分状况下咱们都是用其进行负载平衡，对于利用的状态次要是依赖于其余的监控工具。如果对于小型的团队来说，部署专门的监控工具还须要资源，应用Nginx对利用进行探活监控能够节约这部分老本。
首先装置Nginx
应用yum装置nginx我这里应用的是1.16.1版本
yum install nginx
装置实现后能够获取源码装置命令
nginx -V

装置Nginx探活插件
下载源码与探活插件
wget https://nginx.org/download/ng...
wget https://github.com/yaoweibin/...
Nginx应用源码编译装置相干的依赖包
yum install pcre pcre-devel openssl openssl-devel gd gd-devel zlib patch libxml2-devel libxslt-devel perl-devel perl-ExtUtils-Embed perl zlib-devel patch
解压源码和插件包，我这里将两个软件包全副放到/opt上面进行解压
tar zxvf nginx-1.16.1.tar.gz
unzip nginx_upstream_check_module.zip
patch探活插件到Nginx源码中
cd /opt/nginx-1.16.1
patch -p1 < /opt/nginx_upstream_check_module-master/check_1.16.1+.patch
执行源码编译装置，增加http探活插件
./configure \
--prefix=/usr/share/nginx \
--sbin-path=/usr/sbin/nginx \
--modules-path=/usr/lib64/nginx/modules \
--conf-path=/etc/nginx/nginx.conf \
--error-log-path=/var/log/nginx/error.log \
--http-log-path=/var/log/nginx/access.log \
--http-client-body-temp-path=/var/lib/nginx/tmp/client_body \
--http-proxy-temp-path=/var/lib/nginx/tmp/proxy \
--http-fastcgi-temp-path=/var/lib/nginx/tmp/fastcgi \
--http-uwsgi-temp-path=/var/lib/nginx/tmp/uwsgi \
--http-scgi-temp-path=/var/lib/nginx/tmp/scgi \
--pid-path=/run/nginx.pid \
--lock-path=/run/lock/subsys/nginx \
--user=nginx \
--group=nginx \
--with-file-aio \
--with-ipv6 \
--with-http_ssl_module \
--with-http_v2_module \
--with-http_realip_module \
--with-stream_ssl_preread_module \
--with-http_addition_module \
--with-http_xslt_module=dynamic \
--with-http_image_filter_module=dynamic \
--with-http_sub_module \
--with-http_dav_module \
--with-http_flv_module \
--with-http_mp4_module \
--with-http_gunzip_module \
--with-http_gzip_static_module \
--with-http_random_index_module \
--with-http_secure_link_module \
--with-http_degradation_module \
--with-http_slice_module \
--with-http_stub_status_module \
--with-http_perl_module=dynamic \
--with-http_auth_request_module \
--with-mail=dynamic \
--with-mail_ssl_module \
--with-pcre \
--with-pcre-jit \
--with-stream=dynamic \
--with-stream_ssl_module \
--with-debug \
--with-cc-opt='-O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -specs=/usr/lib/rpm/redhat/redhat-hardened-cc1 -m64 -mtune=generic' \
--with-ld-opt='-Wl,-z,relro -specs=/usr/lib/rpm/redhat/redhat-hardened-ld -Wl,-E' \
--add-module=/opt/nginx_upstream_check_module-master/
应用Nginx负载Artifactory
Nginx能够作为Artifactory制品库的负载均衡器，用来负载Artifactory多个节点间的申请，Artifactory也能够主动生成Nginx配置文件，具体操作参考下图

配置探活
生成配置文件后，应用探活插件的配置办法，在Nginx的config 文件中进行配置。具体样例如下：
upstream artifactory {
server 192.168.1.2:8082;
server 192.168.1.3:8082;

check interval=2000 rise=2 fall=2 timeout=1000 type=http;check_http_send "HEAD / HTTP/1.0\r\n\r\n";check_http_expect_alive http_2xx http_3xx

}
upstream artifactory-direct {
server 192.168.1.2:8081;
server 192.168.1.3:8081;

check interval=2000 rise=2 fall=2 timeout=1000 type=http;check_http_send "HEAD / HTTP/1.0\r\n\r\n";check_http_expect_alive http_2xx http_3xx

}
server {

listen 80 ;server_name artifactory.external.io;if ($http_x_forwarded_proto = '') {    set $http_x_forwarded_proto  $scheme;}## Application specific logs## access_log /var/log/nginx/artifactory.external.io -access.log timing;## error_log /var/log/nginx/artifactory.external.io -error.log;rewrite ^/$ /ui/ redirect;rewrite ^/ui$ /ui/ redirect;chunked_transfer_encoding on;client_max_body_size 0;location / {    proxy_read_timeout  2400s;    proxy_pass_header   Server;    proxy_cookie_path   ~*^/.* /;    proxy_buffer_size 128k;    proxy_buffers 40 128k;    proxy_busy_buffers_size 128k;    proxy_pass          http://artifactory;    proxy_set_header    X-JFrog-Override-Base-Url $http_x_forwarded_proto://$host:$server_port;    proxy_set_header    X-Forwarded-Port  $server_port;    proxy_set_header    X-Forwarded-Proto $http_x_forwarded_proto;    proxy_set_header    Host              $http_host;    proxy_set_header    X-Forwarded-For   $proxy_add_x_forwarded_for;    location ~ ^/artifactory/ {        proxy_pass    http://artifactory-direct;    }}location /status {    check_status;    access_log   off;}

}
探活配置胜利之后拜访，预置的location能够看到以后负载利用节点的衰弱状态


并且还反对json格局查看，不便咱们进行数据采集