Prometheus

Installation

Download: Download | Prometheus ，select Operating system: linux, Architecture: amd64

tar xzf prometheus-2.43.0.linux-amd64.tar.gz
mv prometheus-2.43.0.linux-amd64 /opt/prometheus

第一次啟動

cd /opt/prometheus/
./prometheus --config.file="prometheus.yml"

網頁介面 (僅限本機端存取):

http://localhost:9090/metrics
預設會有本機系統的效能指標
http://localhost:9090/
選擇 Graph，在 Expression 輸入 promhttp_metric_handler_requests_total ，按下 Execute，會有圖形顯示。

Configuration

資料儲存與清理週期

./prometheus --config.file="prometheus.yml" \
    --storage.tsdb.path="/data/prometheus" \
    --storage.tsdb.retention.time=30d

--storage.tsdb.path:
Where Prometheus writes its database. Defaults to data/.
--storage.tsdb.retention.time:
When to remove old data. Defaults to 15d. Overrides storage.tsdb.retention if this flag is set to anything other than default.
--storage.tsdb.retention.size:
The maximum number of bytes of storage blocks to retain. The oldest data will be removed first. Defaults to 0 or disabled. Units supported: B, KB, MB, GB, TB, PB, EB. Ex: "512MB". Based on powers-of-2, so 1KB is 1024B. Only the persistent blocks are deleted to honor this retention although WAL and m-mapped chunks are counted in the total size. So the minimum requirement for the disk is the peak space taken by the wal (the WAL and Checkpoint) and chunks_head (m-mapped Head chunks) directory combined (peaks every 2 hours).

新增服務(自動啟動)

RedHat 8

新增帳號與目錄

useradd -s /sbin/nologin --system prometheus
mkdir /etc/prometheus /data/prometheus

複製檔案

tar xvf prometheus-*.tar.gz
cd prometheus-*/
cp prometheus promtool /usr/local/bin/
cp -r prometheus.yml consoles/ console_libraries/ /etc/prometheus/

chown -R prometheus.prometheus /etc/prometheus
chmod -R 0755 /etc/prometheus
chown prometheus.prometheus /data/prometheus

新增設定檔: /etc/systemd/system/prometheus.service

[Unit]
Description=Prometheus Time Series Collection and Processing Server
Wants=network-online.target
After=network-online.target

[Service]
User=prometheus
Group=prometheus
Type=simple
ExecReload=/bin/kill -HUP $MAINPID
ExecStart=/usr/local/bin/prometheus \
  --config.file /etc/prometheus/prometheus.yml \
  --storage.tsdb.path /data/prometheus/ \
  --storage.tsdb.retention.time=30d \
  --web.console.templates=/etc/prometheus/consoles \
  --web.console.libraries=/etc/prometheus/console_libraries

[Install]
WantedBy=multi-user.target

啟動服務

systemctl daemon-reload
systemctl start prometheus.service
systemctl enable prometheus.service

Monitor to Linux node

Linux Monitoring with Node Exporter

On Linux target

Node Exporter Installation

Download: Download | Prometheus

tar xzf node_exporter-1.5.0.linux-amd64.tar.gz
mv node_exporter-1.5.0.linux-amd64 /opt/node_exporter
chown -R root.root /opt/node_exporter

cd /opt/node_exporter
./node_exporter
# Ctrl + C to exit

Set up node_exporter as service

# Create a user
useradd -r -c "Node Exporter" -s /sbin/nologin node_exporter

# Create a service file
cat <<EOF>/etc/systemd/system/node_exporter.service
[Unit]
Description=Node Exporter

[Service]
User=node_exporter
EnvironmentFile=/etc/sysconfig/node_exporter
ExecStart=/opt/node_exporter/node_exporter $OPTIONS

[Install]
WantedBy=multi-user.target
EOF

# Create the file /etc/sysconfig/node_exporter
echo '#OPTIONS=""' > /etc/sysconfig/node_exporter

# Start the node exporter
systemctl daemon-reload
systemctl start node_exporter.service

On Prometheus Server

prometheus.yml:

scrape_configs:

  # Linux Nodes
  - job_name: linux

    # Override the global default and scrape targets from this job every 5 seconds.
    scrape_interval: 15s

    static_configs:
      - targets: ['linux-node-ip:9100']

Monitor to MySQL

Monitor to AIX

nimon working with Prometheus

Monitor to RabbitMQ