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CentOS7にPrometheusをInstall

Last updated at Posted at 2018-07-30

ネットワーク・サーバー監視ツールのPrometheusをインストールしたので、
そこまでの備忘録です。

環境

CentOS Linux release 7.5
Prometheus 2.3.2
Node exporter 0.16.0

今回はプロメテウスーサーバーを192.168.0.1、監視対象サーバーを192.168.0.2として進めていきたいと思います。IPアドレスはそれぞれの環境に合わせてください。

node_exporterのインストール

port 開放

デフォルトだと9100ポートでlistenするので開放します

# firewall-cmd --add-port=9100/tcp --zone=public --permanent
# firewall-cmd --reload
-- 確認 --
# firewall-cmd --list-ports --zone=public
9100/tcp

Node Exporterのインストール

# mkdir /usr/local/src/prometheus
# cd /usr/local/src/prometheus
# wget https://github.com/prometheus/node_exporter/releases/download/v0.16.0/node_exporter-0.16.0.linux-amd64.tar.gz
# tar zxvf node_exporter-0.16.0.linux-amd64.tar.gz
# mv node_exporter-0.16.0.linux-amd64 node_exporter

起動スクリプト作成

[Unit]
Description=Node Exporter
Documentation=https://github.com/prometheus/node_exporter

[Service]
Type=simple
ExecStart=EnvironmentFile=/usr/local/src/prometheus/node_exporter/node_exporter $OPTIONS
Restart=always

[Install]
WantedBy=multi-user.target

起動

/usr/lib/systemd/system/prometheus-node-exporter.service
# systemctl daemon-reload
-- 自動起動設定 --
# systemctl enable prometheus.service
-- 起動 --
# systemctl start prometheus.service

確認

http://<監視対象サーバーのIPアドレス>/metricsに接続すると
以下のようなステータスが記載されたページが開くと思います

# HELP go_gc_duration_seconds A summary of the GC invocation durations.
# TYPE go_gc_duration_seconds summary
go_gc_duration_seconds{quantile="0"} 4.4412e-05
go_gc_duration_seconds{quantile="0.25"} 6.5151e-05
go_gc_duration_seconds{quantile="0.5"} 7.8829e-05
go_gc_duration_seconds{quantile="0.75"} 0.000107801
go_gc_duration_seconds{quantile="1"} 0.004286416
go_gc_duration_seconds_sum 0.013319998
go_gc_duration_seconds_count 97
# HELP go_goroutines Number of goroutines that currently exist.
# TYPE go_goroutines gauge
go_goroutines 9
# HELP go_info Information about the Go environment.
# TYPE go_info gauge
(略)

Prometheus Serverの導入

port 開放

プロメテウスサーバーはデフォルトだと9090ポートでlistenするので開放します

# firewall-cmd --add-port=9090/tcp --zone=public --permanent
# firewall-cmd --reload
# firewall-cmd --list-ports --zone=public

Prometheus Serverのインストール

# mkdir /usr/local/src/prometheus
# cd /usr/local/src/prometheus
# wget https://github.com/prometheus/prometheus/releases/download/v2.3.2/prometheus-2.3.2.linux-amd64.tar.gz
# tar zxvf prometheus-2.3.2.linux-amd64.tar.gz
# mv prometheus-2.3.2.linux-amd64 promethus-server
# cd promethus-server
# cp prometheus.yml prometheus.yml.org
/usr/local/src/prometheus/prometheus-server/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:
        - '192.168.0.2:9100'

起動スクリプト作成

/usr/lib/systemd/system/prometheus.service
[Unit]
Description=Prometheus - Monitoring system and time series database
Documentation=https://prometheus.io/docs/introduction/overview/
After=network-online.target
After=network-online.target

[Service]
Type=simple
ExecStart=/usr/local/src/prometheus/prometheus-server/prometheus \
  --config.file=/usr/local/src/prometheus/prometheus-server/prometheus.yml \

[Install]
WantedBy=multi-user.target

起動

# systemctl daemon-reload
自動起動設定
# systemctl enable prometheus.service
起動
# systemctl start prometheus.service

確認

http://<プロメテウスサーバーのIPアドレス>:9090/graphに接続すると
以下のようなページが表示されると思います。
スクリーンショット 2018-07-30 12.49.22.png

参考

インフラ・サービス監視ツールの新顔「Prometheus」入門
CentOS 7 に Prometheus 入れる

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