（六）Prometheus 监控 apache 服务

通过上一篇（四）Prometheus + Grafana 可视化的学习，我们已经对 prometheus 做了一个精美的可视化，本篇详细讲解 Prometheus + Grafana 监控 apache 服务。

准备环境

# 这里使用的是（四）Prometheus + Grafana 可视化 完成时的环境
centos 7
prometheus 运行正常
grafana 运行正常

[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))

安装 Apache

[root@fp-21 ~]# yum -y install httpd
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
 * base: mirrors.aliyun.com
 * epel: mirrors.tuna.tsinghua.edu.cn
……
Dependency Installed:
  mailcap.noarch 0:2.1.41-2.el7                                                                     

Complete!

安装 Apache exporter 收集 nginx 的 json 数据，点击下载

# 本地下载也可以
[root@fp-21 ~]# cd /opt/ ; mkdir apache_exporter ; cd apache_exporter
[root@fp-21 apache_exporter]# wget https://github.com/Lusitaniae/apache_exporter/releases/download/v0.5.0/apache_exporter-0.5.0.linux-amd64.tar.gz
[root@fp-21 apache_exporter]# ls
apache_exporter-0.5.0.linux-amd64.tar.gz

# 解压
[root@fp-21 apache_exporter]# tar xf apache_exporter-0.5.0.linux-amd64.tar.gz 
[root@fp-21 apache_exporter]# ls
apache_exporter-0.5.0.linux-amd64  apache_exporter-0.5.0.linux-amd64.tar.gz

# 移动位置
[root@fp-21 apache_exporter]# mv apache_exporter-0.5.0.linux-amd64 /usr/local/apache_exporter
[root@fp-21 apache_exporter]# cd !$
cd /usr/local/apache_exporter
[root@fp-21 apache_exporter]# ls
apache_exporter  LICENSE
[root@fp-21 apache_exporter]# cp apache_exporter /usr/local/bin

启动 apahce 服务

# 启动
[root@fp-21 apache_exporter]# systemctl start httpd

# 查看进程
[root@fp-21 apache_exporter]# ps -ef |grep httpd
root      15455      1  0 21:06 ?        00:00:00 /usr/sbin/httpd -DFOREGROUND
apache    15456  15455  0 21:06 ?        00:00:00 /usr/sbin/httpd -DFOREGROUND
apache    15457  15455  0 21:06 ?        00:00:00 /usr/sbin/httpd -DFOREGROUND
apache    15458  15455  0 21:06 ?        00:00:00 /usr/sbin/httpd -DFOREGROUND
apache    15459  15455  0 21:06 ?        00:00:00 /usr/sbin/httpd -DFOREGROUND
apache    15460  15455  0 21:06 ?        00:00:00 /usr/sbin/httpd -DFOREGROUND
root      15462  15029  0 21:07 pts/1    00:00:00 grep --color=auto httpd

# 查看端口
[root@fp-21 apache_exporter]# ss -lntp |grep httpd
LISTEN     0      128         :::80                      :::*                   users:(("httpd",pid=15460,fd=4),("httpd",pid=15459,fd=4),("httpd",pid=15458,fd=4),("httpd",pid=15457,fd=4),("httpd",pid=15456,fd=4),("httpd",pid=15455,fd=4))

启动 apache_exporter

[root@fp-21 ~]# apache_exporter 
INFO[0000] Starting apache_exporter (version=0.5.0, branch=HEAD, revision=f6a5b4814ea795ee9eac745c55649cce9e5117a9)  source="apache_exporter.go:305"
INFO[0000] Build context (go=go1.9.2, user=root@0fdc4d8924f5, date=20171113-21:19:13)  source="apache_exporter.go:306"
INFO[0000] Starting Server: :9117                        source="apache_exporter.go:307"

查看是否启动成功

[root@fp-21 ~]# ss -lntp |grep 9117
LISTEN     0      128         :::9117                    :::*                   users:(("apache_exporter",pid=15466,fd=3))

添加监控至 Prometheus

[root@fp-21 ~]# vim /usr/local/prometheus/conf/prometheus.yml
 
 35   - job_name: 'apache_status'	# 标签名，监控名
 36     static_configs:
 37     - targets: ['10.0.0.21:9117']	# IP:端口

查看 Prometheus 状态

$[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-NG5qNLS5-1585663304207)(E:\知识点总结\Prometheus\assets\prometheus_26.png)]$

报错：无法收集到页面信息

ERRO[0206] Error scraping apache: Status 404 Not Found (404): <!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>404 Not Found</title>
</head><body>
<h1>Not Found</h1>
<p>The requested URL /server-status/ was not found on this server.</p>

</body></html>
  source="apache_exporter.go:287"

添加 apache 模板

[root@fp-21 ~]# vim /etc/httpd/conf/httpd.conf 
354 LoadModule status_module modules/mod_status.so
355 <location /server-status>
356          SetHandler server-status
357          Order Deny,Allow
358          Deny from nothing
359          Allow from all
360 </location>

访问测试数据页面

$[外链图片转存失败,源站可能有防盗链机制,建议将图片保存下来直接上传(img-6U5pi2Kz-1585663304211)(E:\知识点总结\Prometheus\assets\prometheus_27.png)]$

再次启动

[root@fp-21 ~]# apache_exporter 
INFO[0000] Starting apache_exporter (version=0.5.0, branch=HEAD, revision=f6a5b4814ea795ee9eac745c55649cce9e5117a9)  source="apache_exporter.go:305"
INFO[0000] Build context (go=go1.9.2, user=root@0fdc4d8924f5, date=20171113-21:19:13)  source="apache_exporter.go:306"
INFO[0000] Starting Server: :9117                        source="apache_exporter.go:307"

[root@fp-21 ~]# ss -lntp |grep 9117
LISTEN     0      128         :::9117                    :::*                   users:(("apache_exporter",pid=15709,fd=3))

导入 Grafana 模板

在这里插入图片描述