title: Prometheus部署 #标题tags: Prometheus #标签
date: 2020-08-26
categories: 监控 # 分类
系统化学习Prometheus第一天,跟我一起部署它!
参考官方文档。
下载及调整目录
$ wget https://github.com/prometheus/prometheus/releases/download/v2.20.1/prometheus-2.20.1.linux-amd64.tar.gz$ tar zxf prometheus-2.20.1.linux-amd64.tar.gz -C /opt/$ ln -sf /opt/prometheus-2.20.1.linux-amd64 /opt/prometheus$ ln -sf /opt/prometheus-2.20.1.linux-amd64/prometheus /usr/local/bin/
分析配置文件
$ cd /opt/prometheus$ cat prometheus.yml # 查看默认配置文件,# 号开头表示注释行# 配置文件分为三个模块,global、rule_file及scrape_configs。# global一般不用改动# my global configglobal:# 设置每15s更新一次监控数据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# rule_files块指定了我们希望Prometheus服务器加载的任何报警规则的位置。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控制Prometheus监视哪些资源。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: ['192.168.20.10:9090'] # 这里需要将localhost改为本机地址,否则有些小bug
配置文件支持很多东西,建议阅读下官方配置文档。
Prometheus的启停方式
# 启动Prometheus$ prometheus --config.file="/opt/prometheus/prometheus.yml" --web.enable-lifecycle --storage.tsdb.path=/opt/prometheus/data --storage.tsdb.retention.time=30d & # 启动Prometheus# --web.enable-lifecycle 表示允许通过web接口重载配置文件# --storage.tsdb.path=/opt/prometheus/data 指定数据存储目录,默认是当前目录的data目录# --storage.tsdb.retention.time 指定数据保留时间,默认为15d。$ pkill prometheus # 停止Prometheus# 重载Prometheus# 命令行中给发送hup信号至Prometheus进程$ kill -HUP $(ps -ef | grep prometheus | grep -v grep | awk '{print $2}')# 通过web接口重载,启动时需增加选项 --web.enable-lifecycle$ curl -XPOST http://192.168.20.10:9090/-/reload# 如果配置文件有误,重启时将会看到类似以下的错误信息ERRO[0161] Error reloading config: couldn't load configuration (-config.file=prometheus.yml): unknown fields in scrape_config: job_nae source=main.go:146
输出如下,表示启动成功:

$ ss -lnput | grep 9090 # 确定端口在监听tcp LISTEN 0 128 :::9090 :::* users:(("prometheus",pid=16429,fd=11))
访问web界面
访问Prometheus主机的 9090 端口,点击如下,即可看到监控主机的相关信息(Prometheus默认监控本机):

管理API
健康检查
$ curl http://192.168.20.10:9090/-/healthy
准备检查
$ curl http://192.168.20.10:9090/-/readyPrometheus is Ready.
重载配置文件
$ curl -XPOST http://192.168.20.10:9090/-/reload# 需启动时增加 --web.enable-lifecycle 选项。
停止Prometheus
$ curl -XPUT http://192.168.20.10:9090/-/quit# 或者$ curl -XPOST http://192.168.20.10:9090/-/quit# 同样需启动时增加 --web.enable-lifecycle 选项。
