通過上一篇（四）Prometheus + Grafana 可視化 的學習，我們已經對 prometheus 做了一個精美的可視化，本篇詳細講解 Prometheus + Grafana 監控 nignx 服務。
準備環境
# 這裏使用的是（四）Prometheus + Grafana 可視化 完成時的環境
centos 7
prometheus 運行正常
grafana 運行正常
[root@fp-21 ~]# getenforce
Permissive
[root@fp-21 ~]# ss -lntp |grep prometheus
LISTEN 0 128 :::9090 :::* users:(("prometheus",pid=10531,fd=6))
[root@fp-21 ~]# ss -lntp |grep grafana
LISTEN 0 128 10.0.0.21:3000 *:* users:(("grafana-server",pid=10690,fd=7))
上傳安裝包，解壓
[root@fp-21 ~]# cd /opt/ ; mkdir nginx ; cd nginx
[root@fp-21 nginx]# ls
nginx-1.12.0.tar.gz
# 解壓
[root@fp-21 nginx]# tar xf nginx-1.12.0.tar.gz
# 安裝依賴
[root@fp-21 nginx]# yum -y install openssl-devel pcre-devel
編譯安裝，點擊下載
[root@fp-21 nginx]# ls
nginx-1.12.0 nginx-1.12.0.tar.gz
# 這裏用到的一個模塊
[root@fp-21 nginx]# ls
nginx-1.12.0 nginx-1.12.0.tar.gz nginx-module-vts.tar.gz
# 解壓模塊
[root@fp-21 nginx]# tar xf nginx-module-vts.tar.gz
[root@fp-21 nginx]# ls
nginx-1.12.0 nginx-1.12.0.tar.gz nginx-module-vts nginx-module-vts.tar.gz
# 移動位置
[root@fp-21 nginx]# mv nginx-module-vts /usr/local/
[root@fp-21 nginx]# cd nginx-1.12.0/
# 檢測編譯環境，指定模塊
[root@fp-21 nginx-1.12.0]# ./configure --add-modules=/usr/local/nginx-module-vts
# 安裝
[root@fp-21 nginx-1.12.0]# make && make install
修改配置文件
[root@fp-21 nginx]# cd /usr/local/nginx/conf
[root@fp-21 conf]# cp nginx.conf nginx.conf.bak
[root@fp-21 conf]# vim nginx.conf
# 再http中插入一下內容，位置無所謂
117 vhost_traffic_status_zone;
118 server {
119 listen 81; # 端口不要和已有端口衝突
120 location /status {
121 vhost_traffic_status_display;
122 vhost_traffic_status_display_format html;
123 }
124 }
檢查文件正確性
# 做個軟連接
[root@fp-21 conf]# ln -s /usr/local/nginx/sbin/nginx /usr/local/bin‘
# 查看文件語法
[root@fp-21 conf]# nginx -t
nginx: the configuration file /usr/local/nginx/conf/nginx.conf syntax is ok
nginx: configuration file /usr/local/nginx/conf/nginx.conf test is successful
添加開機自啓
# 編譯系統啓動文件
[root@fp-21 ~]# vim /usr/lib/systemd/system/nginx.service
[Unit]
Description=nginx
After=network.target
[Service]
Type=forking
PIDFile=/usr/local/nginx/logs/nginx.pid
ExecStart=/usr/local/nginx/sbin/nginx
ExecReload=killall -s HUP $(cat /usr/local/nginx/logs/nginx.pid)
ExecStop=killall -s QUIT $(cat /usr/local/nginx/logs/nginx.pid)
PrivateTmp=Flase
[Install]
WantedBy=multi-user.target
# 重新加載
[root@fp-21 conf]# systemctl daemon-reload
# 添加開機自啓
[root@fp-21 conf]# systemctl enable nginx.service
Created symlink from /etc/systemd/system/multi-user.target.wants/nginx.service to /usr/lib/systemd/system/nginx.service.
# 啓動服務
[root@fp-21 ~]# systemctl start nginx
# 查看進程
[root@fp-21 ~]# ps -ef |grep nginx
root 14926 1 0 18:31 ? 00:00:00 nginx: master process /usr/local/nginx/sbin/nginx
nobody 14927 14926 0 18:31 ? 00:00:00 nginx: worker process
root 14929 9751 0 18:31 pts/0 00:00:00 grep --color=auto nginx
# 查看端口
[root@fp-21 ~]# ss -lntp |grep nginx
LISTEN 0 128 *:80 *:* users:(("nginx",pid=14927,fd=6),("nginx",pid=14926,fd=6))
LISTEN 0 128 *:81 *:* users:(("nginx",pid=14927,fd=7),("nginx",pid=14926,fd=7))
訪問查看nginx數據頁
安裝 exporter 收集 nginx 的 json 數據，點擊下載
# 下載
[root@fp-21 ~]# cd /opt/ ;mkdir nginx_exporter ; cd nginx_exporter/
[root@fp-21 nginx_exporter]# ls
nginx-vts-exporter-0.9.1.linux-amd64.tar.gz
# 解壓
[root@fp-21 nginx_exporter]# tar xf nginx-vts-exporter-0.9.1.linux-amd64.tar.gz
[root@fp-21 nginx_exporter]# ls
nginx-vts-exporter-0.9.1.linux-amd64 nginx-vts-exporter-0.9.1.linux-amd64.tar.gz
# 移動位置添加
[root@fp-21 nginx_exporter]# mv nginx-vts-exporter-0.9.1.linux-amd64 /usr/local/nginx-vts-exporter
[root@fp-21 nginx_exporter]# cd !$
cd /usr/local/nginx-vts-exporter
[root@fp-21 nginx-vts-exporter]# cp nginx-vts-exporter /usr/local/bin
啓動 nginx_exporter
[root@fp-21 nginx-vts-exporter]# ./nginx-vts-exporter -nginx.scrape_timeout 10 -nginx.scrape_uri http://10.0.0.21:81/status/format/json
2020/03/31 19:41:12 Starting nginx_vts_exporter (version=0.9.1, branch=HEAD, revision=06ade92fb9e98ddd9544d1118983459e489b180c)
2020/03/31 19:41:12 Build context (go=go1.10, user=root@66925540c2cc, date=20180227-13:06:29)
2020/03/31 19:41:12 Starting Server at : :9913
2020/03/31 19:41:12 Metrics endpoint: /metrics
2020/03/31 19:41:12 Metrics namespace: nginx
2020/03/31 19:41:12 Scraping information from : http://10.0.0.21:81/status/format/json
另開一個窗口，查看端口
[root@fp-21 ~]# ss -lntp |grep 9913
LISTEN 0 128 :::9913 :::* users:(("nginx-vts-expor",pid=15020,fd=3))
添加監控至 Prometheus
[root@fp-21 ~]# vim /usr/local/prometheus/conf/prometheus.yml
35 - job_name: 'nginx_status'
36 static_configs:
37 - targets: ['10.0.0.21:9913']
重啓 Prometheus
[root@fp-21 ~]# systemctl restart prometheus.service
查看 Prometheus 狀態
添加模板，nginx數據可視化
