Prometheus安装和基本配置

Prometheus的主要特点

Prometheus的核心组件

Prometheus Server，主要用于抓取数据和存储时序数据，另外还提供查询和 Alert Rule 配置管理。
client libraries，用于对接 Prometheus Server, 可以查询和上报数据。
push gateway ，用于批量，短期的监控数据的汇总节点，主要用于业务数据汇报等。
各种汇报数据的 exporters ，例如汇报机器数据的 node_exporter, 汇报 MongoDB 信息的 MongoDB exporter 等等。
用于告警通知管理的 alertmanager 。

Prometheus的架构图

从这个架构图，也可以看出 Prometheus 的主要模块包含， Server, Exporters, Pushgateway, PromQL, Alertmanager, WebUI 等。

它大致使用逻辑是这样：

Prometheus的安装

Prometheus的配置

global:
scrape_interval: 15s # By default, scrape targets every 15 seconds.
evaluation_interval: 15s # By default, scrape targets every 15 seconds.
# scrape_timeout is set to the global default (10s).
# Attach these labels to any time series or alerts when communicating with
# external systems (federation, remote storage, Alertmanager).
external_labels:
monitor: 'codelab-monitor'
# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
# - "first.rules"
# - "second.rules"
# 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'
# Override the global default and scrape targets from this job every 5 seconds.
scrape_interval: 5s
# metrics_path defaults to '/metrics'
# scheme defaults to 'http'.
static_configs:
- targets: ['localhost:9090']
- job_name: 'mydemo'
# Override the global default and scrape targets from this job every 5 seconds.
scrape_interval: 5s
metrics_path: '/prometheus'
# scheme defaults to 'http'.
static_configs:
- targets: ['192.168.60.207:8088']

Prometheus的启动