1、在需要安装prometheus的目录下执行wget命令下载软件到本地，如我的路径是/opt/module/prometheus
wget https://github.com/prometheus/prometheus/releases/download/v2.34.0/prometheus-2.34.0.linux-amd64.tar.gz正在解析主机 objects.githubusercontent.com (objects.githubusercontent.com)... 185.199.108.133, 185.199.111.133, 185.199.109.133, ...
正在连接 objects.githubusercontent.com (objects.githubusercontent.com)|185.199.108.133|:443... 已连接。
已发出 HTTP 请求，正在等待回应... 200 OK
长度：76299772 (73M) [application/octet-stream]
正在保存至: “prometheus-2.34.0.linux-amd64.tar.gz”100%[========================================================================================>] 76,299,772 15.7MB/s 用时 5.3s 2023-12-24 11:51:25 (13.9 MB/s) - 已保存 “prometheus-2.34.0.linux-amd64.tar.gz” [76299772/76299772])表示下载已完成
查看
[root@ambari-hadoop1 prometheus]# ll
总用量 74512
-rw-r--r-- 1 root root 76299772 3月 15 2022 prometheus-2.34.0.linux-amd64.tar.gz解压
[root@ambari-hadoop1 prometheus]# tar -zxvf prometheus-2.34.0.linux-amd64.tar.gz
prometheus-2.34.0.linux-amd64/
prometheus-2.34.0.linux-amd64/consoles/
prometheus-2.34.0.linux-amd64/consoles/index.html.example
prometheus-2.34.0.linux-amd64/consoles/node-cpu.html
prometheus-2.34.0.linux-amd64/consoles/node-disk.html
prometheus-2.34.0.linux-amd64/consoles/node-overview.html
prometheus-2.34.0.linux-amd64/consoles/node.html
prometheus-2.34.0.linux-amd64/consoles/prometheus-overview.html
prometheus-2.34.0.linux-amd64/consoles/prometheus.html
prometheus-2.34.0.linux-amd64/console_libraries/
prometheus-2.34.0.linux-amd64/console_libraries/menu.lib
prometheus-2.34.0.linux-amd64/console_libraries/prom.lib
prometheus-2.34.0.linux-amd64/prometheus.yml
prometheus-2.34.0.linux-amd64/LICENSE
prometheus-2.34.0.linux-amd64/NOTICE
prometheus-2.34.0.linux-amd64/prometheus
prometheus-2.34.0.linux-amd64/promtool解压后查看
[root@ambari-hadoop1 prometheus]# ll
总用量 74512
drwxr-xr-x 4 3434 3434 132 3月 15 2022 prometheus-2.34.0.linux-amd64
-rw-r--r-- 1 root root 76299772 3月 15 2022 prometheus-2.34.0.linux-amd64.tar.gz
删除压缩文件
[root@ambari-hadoop1 prometheus]# rm -rf prometheus-2.34.0.linux-amd64.tar.gz
2、创建开机启动项
vim /usr/lib/systemd/system/prometheus.service
配置内容如下
[Unit]
Description=prometheus
Documentation=https://prometheus.io/
After=network.target[Service]
Type=simple
User=root
Group=root
ExecStart=/opt/module/prometheus/prometheus-2.34.0.linux-amd64/prometheus --config.file=/opt/module/prometheus/prometheus-2.34.0.linux-amd64/prometheus.yml
Restart=on-failure[Install]
WantedBy=multi-user.target
设置自动启动：
$ systemctl enable prometheus
报错
[root@ambari-hadoop1 system]# systemctl enable prometheus
Failed to execute operation: File exists原因：之前安装过prometheus，没有卸载干净
接下来卸载之前安装的prometheus文件
先查找
[root@ambari-hadoop1 system]# find / -name prometheus.service
/etc/systemd/system/multi-user.target.wants/prometheus.service
/usr/lib/systemd/system/prometheus.service删除第一个文件，第二个文件是刚刚自己创建的prometheus.service
[root@ambari-hadoop1 system]# rm -rf /etc/systemd/system/multi-user.target.wants/prometheus.service再次查看
[root@ambari-hadoop1 system]# find / -name prometheus.service
/usr/lib/systemd/system/prometheus.service设置开机启动
[root@ambari-hadoop1 system]# systemctl enable prometheus
Created symlink from /etc/systemd/system/multi-user.target.wants/prometheus.service to /usr/lib/systemd/system/prometheus.service.
启动服务并查看启动状态：
# 重新加载某个服务的配置文件
$ systemctl daemon-reload
# 启动prometheus
$ systemctl start prometheus
# 查看prometheus状态
$ systemctl status prometheus[root@ambari-hadoop1 system]# systemctl status prometheus
● prometheus.service - prometheusLoaded: loaded (/usr/lib/systemd/system/prometheus.service; enabled; vendor preset: disabled)Active: active (running) since 日 2023-12-24 12:08:55 CST; 5s agoDocs: https://prometheus.io/Main PID: 3960 (prometheus)Tasks: 9Memory: 19.4MCGroup: /system.slice/prometheus.service└─3960 /opt/module/prometheus/prometheus-2.34.0.linux-amd64/prometheus --config.file=/opt/module/prometheus/promethe...12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.726Z caller=head.go:493 level=info component=tsd... any"
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.726Z caller=head.go:536 level=info component=tsd…=5.31µs
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.726Z caller=head.go:542 level=info component=tsd...hile"
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.727Z caller=head.go:613 level=info component=tsd...ent=0
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.727Z caller=head.go:619 level=info component=tsd…0.235µs
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.727Z caller=main.go:958 level=info fs_type=XFS_S...MAGIC
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.727Z caller=main.go:961 level=info msg="TSDB started"
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.727Z caller=main.go:1142 level=info msg="Loading...s.yml
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.728Z caller=main.go:1179 level=info msg="Completed lo…µs
12月 24 12:08:55 ambari-hadoop1 prometheus[3960]: ts=2023-12-24T04:08:55.728Z caller=main.go:910 level=info msg="Server i...sts."
Hint: Some lines were ellipsized, use -l to show in full.3、访问prometheus页面查看 http协议+prometheus安装主机的ip地址+端口号
http://192.168.0.21:9090
在页面Status------>targets查看节点信息
4、在本机上安装Node-exporter客户端采集数据
NodeExporter 是 Prometheus 官方提供的一个可以采集到主机信息的应用程序，它能采集到机器的 CPU、内存、磁盘等信息。作为基础的组件，一般在所有的节点都都会安装。
从prometheus官网找https://prometheus.io/download/ 获取最新的 Node Exporter 版本的二进制包：
https://prometheus.io/download/
下载node_exporter-1.7.0.linux-amd64.tar.gz
[root@ambari-hadoop1 node-exporter]# ll
总用量 10176
-rw-r--r-- 1 root root 10419253 12月 24 13:22 node_exporter-1.7.0.linux-amd64.tar.gz
[root@ambari-hadoop1 node-exporter]# pwd
/opt/module/prometheus/node-exporter解压
[root@ambari-hadoop1 node-exporter]# pwd
/opt/module/prometheus/node-exporter
[root@ambari-hadoop1 node-exporter]# tar -zxvf node_exporter-1.7.0.linux-amd64.tar.gz
node_exporter-1.7.0.linux-amd64/
node_exporter-1.7.0.linux-amd64/LICENSE
node_exporter-1.7.0.linux-amd64/node_exporter
node_exporter-1.7.0.linux-amd64/NOTICE
[root@ambari-hadoop1 node-exporter]# ll
总用量 10176
drwxr-xr-x 2 1001 1002 56 11月 13 08:03 node_exporter-1.7.0.linux-amd64
-rw-r--r-- 1 root root 10419253 12月 24 13:22 node_exporter-1.7.0.linux-amd64.tar.gz在解压后的目录下后台运行
[root@ambari-hadoop1 node_exporter-1.7.0.linux-amd64]# pwd
/opt/module/prometheus/node-exporter/node_exporter-1.7.0.linux-amd64运行node Exporter ，指定为8080端口运行
# 前台运行
$ ./node_exporter --web.listen-address 192.168.0.21:8080
# 后台运行
$ nohup ./node_exporter --web.listen-address 192.168.0.21:8080 >> nohup.out 2>&1 &
[root@ambari-hadoop1 node_exporter-1.7.0.linux-amd64]# pwd
/opt/module/prometheus/node-exporter/node_exporter-1.7.0.linux-amd64
[root@ambari-hadoop1 node_exporter-1.7.0.linux-amd64]# nohup ./node_exporter --web.listen-address 192.168.0.21:8080 >> nohup.out 2>&1 &
[1] 9032查看node-exporter运行成功后的页面
http://192.168.0.21:8080
配置prometheus的监控数据源
现在我们运行了 Prometheus 服务器，也运行了业务数据源 NodeExporter。但此时 Prometheus 还获取不到任何数据，我们还需要配置下 prometheus.yml 文件，让其去拉取 Node Exporter 的数据
prometheus.yml并在 scrape_configs 节点下添加以下内容：
[root@ambari-hadoop1 prometheus-2.34.0.linux-amd64]# pwd
/opt/module/prometheus/prometheus-2.34.0.linux-amd64
[root@ambari-hadoop1 prometheus-2.34.0.linux-amd64]# ll
总用量 197372
drwxr-xr-x 2 3434 3434 38 3月 15 2022 console_libraries
drwxr-xr-x 2 3434 3434 173 3月 15 2022 consoles
drwxr-xr-x 2 root root 6 12月 24 12:01 data
-rw-r--r-- 1 3434 3434 11357 3月 15 2022 LICENSE
-rw-r--r-- 1 3434 3434 3773 3月 15 2022 NOTICE
-rwxr-xr-x 1 3434 3434 105137495 3月 15 2022 prometheus
-rw-r--r-- 1 3434 3434 934 3月 15 2022 prometheus.yml
-rwxr-xr-x 1 3434 3434 96946761 3月 15 2022 promtool
[root@ambari-hadoop1 prometheus-2.34.0.linux-amd64]# 修改路径下的prometheus.yml文件
下方为原先有的文件
[root@ambari-hadoop1 prometheus-2.34.0.linux-amd64]# vim prometheus.yml # Alertmanager configuration
alerting:alertmanagers:- static_configs:- targets:# - alertmanager:9093# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:# - "first_rules.yml"# - "second_rules.yml"# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:# The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.- job_name: "prometheus"# metrics_path defaults to '/metrics'# scheme defaults to 'http'.static_configs:- targets: ["localhost:9090"]需要增加的配置文件
- job_name: 'node-exporter'static_configs:- targets: ['localhost:8080']修改后的配置文件
# Alertmanager configuration
alerting:alertmanagers:- static_configs:- targets:# - alertmanager:9093# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:# - "first_rules.yml"# - "second_rules.yml"# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:# The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.- job_name: "prometheus"# metrics_path defaults to '/metrics'# scheme defaults to 'http'.static_configs:- targets: ["localhost:9090"]- job_name: 'node-exporter'static_configs:- targets: ['localhost:8080']注意：每次修改配置完成，用promtool检测配置文件是否正确
$ ./promtool check config ./prometheus.yml
[root@ambari-hadoop1 prometheus-2.34.0.linux-amd64]# ./promtool check config ./prometheus.yml
Checking ./prometheus.ymlSUCCESS: ./prometheus.yml is valid prometheus config file syntax重启prometheus
$ systemctl restart prometheus
重启后发现增加了node-exporter的信息，状态为up
