02 Prometheus入门安装教程

大家好，我是秋意零。今天分享一篇入门级Prometheus安装教程。

环境准备

三台Linux虚拟机（一台也可以）

准备Prometheus、相关组件安装包

Prometheus官网下载安装包比较慢，如果没有魔法。可关注公众号 【秋意零】回复101 获取

官网下载地址：https://prometheus.io/download/

上传/解压包

配置Hosts映射、上传安装包并进行解压

[root@node01 ~]# cat /etc/hosts
127.0.0.1   localhost localhost.localdomain localhost4 localhost4.localdomain4
::1         localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.200.7 node01
192.168.200.9 node02
192.168.200.10 node03
[root@node01 ~]# tar -vzxf prometheus-2.45.5.linux-amd64.tar.gz  -C /usr/local/
[root@node01 ~]# tar -vzxf pushgateway-1.8.0.linux-amd64.tar.gz -C /usr/local/
[root@node01 ~]# tar -vzxf node_exporter-1.8.0.linux-amd64.tar.gz -C /usr/local/

配置Prometheus

1）进入Prometheus家目录，配置prometheus.yml文件

[root@node01 prometheus-2.45.5.linux-amd64]# cat prometheus.yml
# my global config
global:
  scrape_interval: 15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).

# 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"]
	
	# 添加下列配置
  - job_name: "pushgateway"
    static_configs:
      - targets: ["localhost:9091"]
        labels:
          instance: pushgateway

  - job_name: "node exporter"
    static_configs:
      - targets: ["node01:9100","node02:9100","node03:9100"]

2）scp复制node_exporter（一个节点可不做）

[root@node01 local]# scp -r node_exporter-1.8.0.linux-amd64/ node02:/usr/local/
[root@node01 local]# scp -r node_exporter-1.8.0.linux-amd64/ node03:/usr/local/

3）启动node_exporter（三个节点都启动）

[root@node01 local]# cd node_exporter-1.8.0.linux-amd64/
[root@node01 node_exporter-1.8.0.linux-amd64]# nohup ./node_exporter &

浏览器访问

node_exporter服务地址：http://192.168.200.7:9100/

node_exporter服务监控指标地址：http://192.168.200.7:9100/metrics，可以看到当前 node exporter 获取到的当前主机的所有监控数据

4）启动Pushgateway、Prometheus

[root@node01 pushgateway-1.8.0.linux-amd64]# nohup ./pushgateway --web.listen-address :9091 > ./pushgateway.log 2>&1 &
[root@node01 prometheus-2.45.5.linux-amd64]# nohup ./prometheus --config.file=prometheus.yml > ./prometheus.log 2>&1 &

浏览器访问

pushgateway服务地址：http://192.168.200.7:9091

prometheus服务地址：http://192.168.200.7:9090/

查看组件状态是否正常

启停脚本

由于，咱们Prometheus服务以及相关组件，通过二进制命令手动启动的，不便于管理。所以我们可以编写Shell启停脚本管理。如下：

注意：服务的路径需要根据自己的存放位置自行修改

[root@node01 ~]# cat /usr/local/bin/moniter
#!/bin/bash
case $1 in
"start"){
  echo "=== 启动 Prometheus ==="
  nohup /usr/local/prometheus-2.45.5.linux-amd64/prometheus --config.file=/usr/local/prometheus-2.45.5.linux-amd64/prometheus.yml > /usr/local/prometheus-2.45.5.linux-amd64/prometheus.log 2>&1 &

  echo "=== 启动 Node_exporter ==="
  nohup /usr/local/node_exporter-1.8.0.linux-amd64/node_exporter > /usr/local/node_exporter-1.8.0.linux-amd64/node_exporter.log 2>&1 &
  echo "=== 启动 Pushgateway ==="
  nohup /usr/local/pushgateway-1.8.0.linux-amd64/pushgateway --web.listen-address :9091 > /usr/local/pushgateway-1.8.0.linux-amd64/pushgateway.log 2>&1 &

};;
"stop"){
  echo "=== 停止 Pushgateway ==="
  pgrep -f pushgateway | xargs kill
  echo "=== 停止 Node_exporter ==="
  pgrep -f node_exporter | xargs kill
  echo "=== 停止 Prometheus ==="
  pgrep -f prometheus | xargs kill

};;
esac

执行脚本

[root@node01 ~]# chmod +x /usr/local/bin/moniter

[root@node01 ~]# moniter stop
=== 停止 Pushgateway ===
=== 停止 Node_exporter ===
=== 停止 Prometheus ===
[root@node01 ~]#
[root@node01 ~]#
[root@node01 ~]# moniter start
=== 启动 Prometheus ===
=== 启动 Node_exporter ===
=== 启动 Pushgateway ===

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