文章目录
- 一、前提准备及规划
- 二、安装及启动
- 2.1 Prometheus安装启动
- 2.2 Node_export安装启动
- 2.3 Alertmanager安装启动
- 2.4 Webhook-dingtalk安装启动
- 三、配置及测试
- 3.1 Webhook-dingtalk配置钉钉webhook地址
- 3.2 Alertmanager配置钉钉告警
- 3.3 Prometheus集成Alertmanager及告警规则配置
- 四、测试告警
一、前提准备及规划
1、服务端口规划：
| 服务 | 端口 |
|---|---|
| Prometheus | 59090 |
| Node_exporter | 59100 |
| Alertanager | 9093 |
| Webhook-dingtalk | 8060 |
2、本次实验架构调用图如下：
3、钉钉创建机器人保存Webhook地址：
总共需要保存两项，我们后续会用到：
1、加签后的秘钥
2、webhook地址
二、安装及启动
安装配置只涉及到安装及正常启动无误，并不涉及配置内容！
创建 /usr/local/prometheus 目录，设计到所有安装的服务，咱们都放到此目录中。
mkdir /usr/local/prometheus
配置时间同步 && 定时同步
yum -y install ntpdate
ntpdate ntp1.aliyun.comecho "0 1 * * * ntpdate ntp1.aliyun.com" >> /var/spool/cron/root
crontab -l
2.1 Prometheus安装启动
1、安装Prometheus
官方下载地址：
wget https://github.com/prometheus/prometheus/releases/download/v2.42.0/prometheus-2.42.0.linux-amd64.tar.gztar zxf prometheus-2.42.0.linux-amd64.tar.gz
mv prometheus-2.42.0.linux-amd64 /usr/local/prometheus/prometheus
2、配置Prometheus使用systemd管理
vim /usr/lib/systemd/system/prometheus.service[Unit]
Description=Prometheus-Server
Documentation=https://prometheus.io/
After=network.target[Service]
ExecStart=/usr/local/prometheus/prometheus/prometheus --web.listen-address=0.0.0.0:59090 --config.file=/usr/local/prometheus/prometheus/prometheus.yml
User=root[Install]
WantedBy=multi-user.target3、启动 && 开机自启
systemctl enable prometheus --now
systemctl status prometheus
4、验证
浏览器访问 http://IP：59090，显示下图表示无误~
2.2 Node_export安装启动
1、安装node_export
官方下载地址：
wget https://github.com/prometheus/node_exporter/releases/download/v1.5.0/node_exporter-1.5.0.linux-amd64.tar.gztar zxf node_exporter-1.5.0.linux-amd64.tar.gz
mv node_exporter-1.5.0.linux-amd64 /usr/local/prometheus/node_exporter
2、配置node_exporter使用systemd管理
vim /usr/lib/systemd/system/node_exporter.service[Unit]
Description=Prometheus-Server
After=network.target[Service]
ExecStart=/usr/local/prometheus/node_exporter/node_exporter --web.listen-address=0.0.0.0:59100
User=root[Install]
WantedBy=multi-user.target3、启动 && 开机自启
systemctl enable node_exporter --now
systemctl status node_exporter
4、验证 浏览器查看 收集数据信息
浏览器访问 http://IP:59100/metrics，显示下图表示无误~
2.3 Alertmanager安装启动
1、安装Altermanager
官方下载地址：
wget https://github.com/prometheus/alertmanager/releases/download/v0.25.0-rc.2/alertmanager-0.25.0-rc.2.linux-amd64.tar.gztar zxf alertmanager-0.25.0-rc.2.linux-amd64.tar.gz
mv alertmanager-0.25.0-rc.2.linux-amd64 /usr/local/prometheus/alertmanager
2、配置Alertmanager使用systemd管理
vim /usr/lib/systemd/system/alertmanager.service[Unit]
Description=Prometheus-Server
After=network.target[Service]
ExecStart=/usr/local/prometheus/alertmanager/alertmanager --cluster.advertise-address=0.0.0.0:59093 --config.file=/usr/local/prometheus/alertmanager/alertmanager.yml
User=root[Install]
WantedBy=multi-user.target3、启动 && 开机自启
systemctl enable alertmanager --now
systemctl status alertmanager
4、验证 浏览器访问alertmanager管理页面
浏览器访问 http://IP:9093，显示下图表示无误~
2.4 Webhook-dingtalk安装启动
1、安装webhook-dingtalk插件
下载地址:
wget https://github.com/timonwong/prometheus-webhook-dingtalk/releases/download/v2.1.0/prometheus-webhook-dingtalk-2.1.0.linux-amd64.tar.gztar zxf prometheus-webhook-dingtalk-2.1.0.linux-amd64.tar.gz
mv prometheus-webhook-dingtalk-2.1.0.linux-amd64 /usr/local/prometheus/webhook-dingtalk
2、配置webhook-dingtalk使用systemd管理
cp /usr/local/prometheus/webhook-dingtalk/config.example.yml /usr/local/prometheus/webhook-dingtalk/config.yml
vim /usr/lib/systemd/system/webhook.service[Unit]
Description=Prometheus-Server
After=network.target[Service]
ExecStart=/usr/local/prometheus/webhook-dingtalk/prometheus-webhook-dingtalk --config.file=/usr/local/prometheus/webhook-dingtalk/config.yml
User=root[Install]
WantedBy=multi-user.target3、启动 && 开机自启
systemctl enable webhook.service --now
systemctl status webhook.service
4、验证，查看端口是否启动
netstat -anput |grep 8060
三、配置及测试
3.1 Webhook-dingtalk配置钉钉webhook地址
1、 Webhook-dingtalk配置相对比较简单，只改以下三处即可，如下图：
加签秘钥、webhook地址是咱们在钉钉创建机器人时获取的！
vim /usr/local/prometheus/webhook-dingtalk/config.yml
2、添加钉钉报警模板
vim /usr/local/prometheus/webhook-dingtalk/template.tmpl{{ define "__subject" }}
[{{ .Status | toUpper }}{{ if eq .Status "firing" }}:{{ .Alerts.Firing | len }}{{ end }}]
{{ end }}{{ define "__alert_list" }}{{ range . }}
---
{{ if .Labels.owner }}@{{ .Labels.owner }}{{ end }}**告警主题**: {{ .Annotations.summary }}**告警类型**: {{ .Labels.alertname }}**告警级别**: {{ .Labels.severity }} **告警主机**: {{ .Labels.instance }} **告警信息**: {{ index .Annotations "description" }}**告警时间**: {{ dateInZone "2006.01.02 15:04:05" (.StartsAt) "Asia/Shanghai" }}
{{ end }}{{ end }}{{ define "__resolved_list" }}{{ range . }}
---
{{ if .Labels.owner }}@{{ .Labels.owner }}{{ end }}**告警主题**: {{ .Annotations.summary }}**告警类型**: {{ .Labels.alertname }} **告警级别**: {{ .Labels.severity }}**告警主机**: {{ .Labels.instance }}**告警信息**: {{ index .Annotations "description" }}**告警时间**: {{ dateInZone "2006.01.02 15:04:05" (.StartsAt) "Asia/Shanghai" }}**恢复时间**: {{ dateInZone "2006.01.02 15:04:05" (.EndsAt) "Asia/Shanghai" }}
{{ end }}{{ end }}{{ define "default.title" }}
{{ template "__subject" . }}
{{ end }}{{ define "default.content" }}
{{ if gt (len .Alerts.Firing) 0 }}
**====侦测到{{ .Alerts.Firing | len }}个故障====**
{{ template "__alert_list" .Alerts.Firing }}
---
{{ end }}{{ if gt (len .Alerts.Resolved) 0 }}
**====恢复{{ .Alerts.Resolved | len }}个故障====**
{{ template "__resolved_list" .Alerts.Resolved }}
{{ end }}
{{ end }}{{ define "ding.link.title" }}{{ template "default.title" . }}{{ end }}
{{ define "ding.link.content" }}{{ template "default.content" . }}{{ end }}
{{ template "default.title" . }}
{{ template "default.content" . }}3、重启
systemctl restart webhook
systemctl status webhook
3.2 Alertmanager配置钉钉告警
1、修改配置
vim /usr/local/prometheus/alertmanager/alertmanager.ymlroute:group_by: ['dingding']group_wait: 30sgroup_interval: 1hrepeat_interval: 1hreceiver: 'dingding.webhook1'routes:- receiver: 'dingding.webhook1'match_re:alertname: ".*"
receivers:- name: 'dingding.webhook1'webhook_configs:- url: 'http://16.32.15.200:8060/dingtalk/webhook1/send'send_resolved: true
inhibit_rules:- source_match:severity: 'critical'target_match:severity: 'warning'equal: ['alertname', 'dev', 'instance']
重点修改地方我已图片圈出，如下图：
2、重启
systemctl restart alertmanager
systemctl status alertmanager
3.3 Prometheus集成Alertmanager及告警规则配置
1、修改prometheus配置
vim /usr/local/prometheus/prometheus/prometheus.ymlglobal:scrape_interval: 15s evaluation_interval: 15s alerting:alertmanagers:- static_configs:- targets:- 16.32.15.200:9093rule_files:- "/usr/local/prometheus/prometheus/rule/node_exporter.yml"scrape_configs:- job_name: "VMware-16.32.15.200"static_configs:- targets: ["16.32.15.200:59100"]重点修改地方，我已图片形式标注，如下图：
2、添加node_exporter告警规则
mkdir /usr/local/prometheus/prometheus/rule
vim /usr/local/prometheus/prometheus/rule/node_exporter.ymlgroups:
- name: 服务器资源监控rules:- alert: 内存使用率过高expr: 100 - (node_memory_MemAvailable_bytes / node_memory_MemTotal_bytes) * 100 > 80for: 3m labels:severity: 严重告警annotations:summary: "{{ $labels.instance }} 内存使用率过高, 请尽快处理！"description: "{{ $labels.instance }}内存使用率超过80%,当前使用率{{ $value }}%."- alert: 服务器宕机expr: up == 0for: 1slabels:severity: 严重告警annotations:summary: "{{$labels.instance}} 服务器宕机, 请尽快处理!"description: "{{$labels.instance}} 服务器延时超过3分钟,当前状态{{ $value }}. "- alert: CPU高负荷expr: 100 - (avg by (instance,job)(irate(node_cpu_seconds_total{mode="idle"}[5m])) * 100) > 90for: 5mlabels:severity: 严重告警annotations:summary: "{{$labels.instance}} CPU使用率过高,请尽快处理！"description: "{{$labels.instance}} CPU使用大于90%,当前使用率{{ $value }}%. "- alert: 磁盘IO性能expr: avg(irate(node_disk_io_time_seconds_total[1m])) by(instance,job)* 100 > 90for: 5mlabels:severity: 严重告警annotations:summary: "{{$labels.instance}} 流入磁盘IO使用率过高,请尽快处理！"description: "{{$labels.instance}} 流入磁盘IO大于90%,当前使用率{{ $value }}%."- alert: 网络流入expr: ((sum(rate (node_network_receive_bytes_total{device!~'tap.*|veth.*|br.*|docker.*|virbr*|lo*'}[5m])) by (instance,job)) / 100) > 102400for: 5mlabels:severity: 严重告警annotations:summary: "{{$labels.instance}} 流入网络带宽过高，请尽快处理！"description: "{{$labels.instance}} 流入网络带宽持续5分钟高于100M. RX带宽使用量{{$value}}."- alert: 网络流出expr: ((sum(rate (node_network_transmit_bytes_total{device!~'tap.*|veth.*|br.*|docker.*|virbr*|lo*'}[5m])) by (instance,job)) / 100) > 102400for: 5mlabels:severity: 严重告警annotations:summary: "{{$labels.instance}} 流出网络带宽过高,请尽快处理！"description: "{{$labels.instance}} 流出网络带宽持续5分钟高于100M. RX带宽使用量{$value}}."- alert: TCP连接数expr: node_netstat_Tcp_CurrEstab > 10000for: 2mlabels:severity: 严重告警annotations:summary: " TCP_ESTABLISHED过高！"description: "{{$labels.instance}} TCP_ESTABLISHED大于100%,当前使用率{{ $value }}%."- alert: 磁盘容量expr: 100-(node_filesystem_free_bytes{fstype=~"ext4|xfs"}/node_filesystem_size_bytes {fstype=~"ext4|xfs"}*100) > 90for: 1mlabels:severity: 严重告警annotations:summary: "{{$labels.mountpoint}} 磁盘分区使用率过高，请尽快处理！"description: "{{$labels.instance}} 磁盘分区使用大于90%，当前使用率{{ $value }}%."
3、重启
systemctl restart prometheus
systemctl status prometheus
4、访问Prometheus Web页面可以查看到添加的规则，如下图：
四、测试告警
1、故意将node_exporter停止掉，模拟服务器宕机
systemctl stop node_exporter
2、Prometheus 管理页面可以看到告警信息如下图：
3、Prometheus会将告警信息发送给Alertmanager，所以说Alertmanager页面可以看到告警信息如下图：
4、此时会发送到钉钉机器人告警，如下图所示：
