prometheus+grafana監控文檔安裝

1.下載安裝包
Wget https://github.com/prometheus/prometheus/releases/download/v2.10.0/prometheus-2.10.0.linux-amd64.tar.gz
2.創建運行用戶
[root@localhost opt]# groupadd -r prometheus
[root@localhost opt]# useradd -r -g prometheus -d / -s /sbin/nologin -c "prometheus user" prometheus
3.二進制安裝
[root@localhost opt]# tar -xf prometheus-2.10.0.linux-amd64.tar.gz
[root@localhost opt]# mkdir /etc/prometheus
[root@localhost opt]# mkdir /var/lib/prometheus
[root@localhost opt]# cp prometheus-2.10.0.linux-amd64/prometheus /usr/local/bin/
[root@localhost opt]# cp prometheus-2.10.0.linux-amd64/prometheus.yml /etc/prometheus/
[root@localhost opt]# chown -R prometheus:prometheus /etc/prometheus
[root@localhost opt]# chown -R prometheus:prometheus /var/lib/prometheus/
[root@localhost opt]# vim /usr/lib/systemd/system/prometheus.service

4.配置啟動腳本
[Unit]
Description=prometheus
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/bin/prometheus \
--config.file=/etc/prometheus/prometheus.yml \
--storage.tsdb.path=/var/lib/prometheus \
--storage.tsdb.retention=15d \
--web.read-timeout=5m \
--web.max-connections=10 \
--query.max-concurrency=20 \
--query.timeout=2m \
--web.enable-lifecycle
Restart=on-failure
[Install]
WantedBy=multi-user.target
參數解釋：
--config.file=/etc/prometheus/prometheus.yml ### prometheus配置文件
--storage.tsdb.path=/var/lib/prometheus ### prometheus 存儲數據路徑
--storage.tsdb.retention=15d ### prometheus采集數據保留時間
--web.read-timeout=5m ### 請求鏈接的最大等待時間　　　　　　　　　　
--web.max-connections=10 ### 最大鏈接數
--query.max-concurrency=20 ### 最大支持的并發查詢量
--query.timeout=2m ### 單個查詢超時時間
--web.enable-lifecycle ### 熱加載
5.啟動
[root@localhost opt]# systemctl daemon-reload
[root@localhost opt]# systemctl enable prometheus
[root@localhost opt]# systemctl start prometheus
[root@localhost opt]# netstat -anlptu|grep :9090
tcp 0 0 127.0.0.1:58628 127.0.0.1:9090 ESTABLISHED 8528/prometheus
tcp6 0 0 :::9090 :::* LISTEN 8528/prometheus
tcp6 0 0 ::1:9090 ::1:58374 ESTABLISHED 8528/prometheus
tcp6 0 0 127.0.0.1:9090 127.0.0.1:58628 ESTABLISHED 8528/prometheus
tcp6 0 0 ::1:58374 ::1:9090 ESTABLISHED 8528/prometheus

部署node_exporter
Node_exporter收集機器的系統數據，這里采用prometheus官方提供的exporter，除node_exporter外，官方還提供consul，memcached，haproxy，mysqld等exporter，具體可查看官網。

這里在prometheus服務和 node節點部署相關服務。
tar -zxvf node_exporter-0.17.0-rc.0.linux-amd64.tar.gz -C /usr/local/
cd /usr/local/
mv node_exporter-0.17.0-rc.0.linux-amd64 node_exporter
設置用戶（節點）
groupadd prometheus
useradd -g prometheus -s /sbin/nologin prometheus
chown -R prometheus:prometheus /usr/local/node_exporter

[root@node1 ~]# vim /usr/lib/systemd/system/node_exporter.service
[Unit]
Description=node_exporter
Documentation=https://prometheus.io/
After=network.target
[Service]
Type=simple
User=prometheus
ExecStart=/usr/local/node_exporter/node_exporter
Restart=on-failure
[Install]
WantedBy=multi-user.target

[root@node1 ~]# systemctl enable node_exporter
[root@node1 ~]# systemctl start node_exporter

grafana安裝
https://grafana.com/grafana/download
配置文件
配置文件位于/etc/grafana/grafana.ini，這里暫時保持默認配置即可
設置開機啟動
systemctl enable grafana-server
systemctl start grafana-server