tar -zxvf node_exporter-1.8.2.linux-amd64.tar.gz

vim /etc/systemd/system/node_exporter.service

[Unit]
Description=node_exporter Monitoring System
Documentation=node_exporter Monitoring System
[Service]
ExecStart=/opt/exporter/node_exporter/node_exporter --web.listen-address=:9100
[Install]
WantedBy=multi-user.target

systemctl daemon-reexec
systemctl daemon-reload


systemctl start node_exporter
systemctl status node_exporter

systemctl enable node_exporter

ss -ntl | grep 9100

curl http://localhost:9100/metrics


--------------------------------------------------------------------------------------------------------

# 下载 node_exporter
cd /opt/
wget https://github.com/prometheus/node_exporter/releases/download/v1.8.0/node_exporter-1.8.0.linux-amd64.tar.gz
tar -xzf node_exporter-1.8.0.linux-amd64.tar.gz
mv node_exporter-1.8.2.linux-amd64 node_exporter


# systemd 管理----------
sudo tee /etc/systemd/system/node_exporter.service > /dev/null <<EOF
[Unit]
Description=Prometheus Node Exporter
After=network.target

[Service]
User=root
ExecStart=/opt/exporter/node_exporter/node_exporter
Restart=on-failure

[Install]
WantedBy=multi-user.target
EOF
# systemd 管理----------
sudo systemctl daemon-reexec
sudo systemctl daemon-reload
sudo systemctl start node_exporter
sudo systemctl status node_exporter
sudo systemctl enable node_exporter


# 启动服务
nohup /opt/node_exporter/node_exporter > /opt/node_exporter/node_exporter.log 2>&1 &

默认监听 9100，确认防火墙放行或仅 Prometheus 网络能访问。

调试技巧
cat /proc/1784152/cmdline | tr '\0' '\n'

安装 process_exporter（二进制）
cd /opt/
wget https://github.com/ncabatoff/process-exporter/releases/download/v0.7.10/process-exporter-0.7.10.linux-amd64.tar.gz
tar -xzf process-exporter-0.7.10.linux-amd64.tar.gz
mv process-exporter-0.8.5.linux-amd64 process-exporter


sudo tee /etc/systemd/system/process_exporter.service > /dev/null <<EOF
[Unit]
Description=Prometheus Process Exporter
After=network.target

[Service]
ExecStart=/opt/exporter/process-exporter/process-exporter --config.path=/opt/exporter/process-exporter/process-exporter.yml
Restart=always
User=root

[Install]
WantedBy=multi-user.target
EOF

sudo systemctl daemon-reload
sudo systemctl start process_exporter
sudo systemctl status process_exporter
sudo systemctl enable process_exporter





安装 mongodb_exporter
cd /opt
wget https://github.com/percona/mongodb_exporter/releases/download/v0.40.0/mongodb_exporter-0.40.0.linux-amd64.tar.gz
tar -xzf mongodb_exporter-0.40.0.linux-amd64.tar.gz
mv mongodb_exporter-0.40.0.linux-amd64 /opt/mongodb_exporter


use admin
db.createUser({
  user: "prometheus",
  pwd: "StrongPassword",
  roles: [ { role: "clusterMonitor", db: "admin" } ]
})


[Unit]
Description=Prometheus MongoDB Exporter
After=network.target

[Service]
ExecStart=/opt/exporter/mongodb_exporter/mongodb_exporter \
  --mongodb.uri=mongodb://prometheus:StrongPassword@localhost:27017/admin
Restart=on-failure
User=root

[Install]
WantedBy=multi-user.target



sudo tee /etc/systemd/system/mongodb_exporter.service > /dev/null <<EOF
[Unit]
Description=Prometheus MongoDB Exporter
After=network.target

[Service]
ExecStart=/opt/exporter/mongodb_exporter/mongodb_exporter \
  --mongodb.uri=mongodb://admin:Ud4G8sty6BK@localhost:27017/admin \
Restart=on-failure
User=root

[Install]
WantedBy=multi-user.target
EOF


# 请将 mongodb://myuser:mypassword@localhost:27017/admin 替换为你的实际账号密码和数据库地址。

sudo systemctl daemon-reload
sudo systemctl restart mongodb_exporter
sudo systemctl start mongodb_exporter
sudo systemctl status mongodb_exporter
sudo systemctl enable mongodb_exporter


[Unit]
Description=Prometheus MongoDB Exporter
After=network.target

[Service]
ExecStart=/opt/exporter/mongodb_exporter/mongodb_exporter   --mongodb.uri=mongodb://admin:Ud4G8sty6BK@localhost:27017/admin   --compatible-mode
Restart=on-failure
User=root

[Install]
WantedBy=multi-user.target



# 启动
/opt/mongodb_exporter/mongodb_exporter \
  --mongodb.uri="mongodb://<user>:<password>@localhost:27017/admin" &










use admin

// 获取总连接数信息
var connStatus = db.serverStatus().connections;
print("总连接数 current:", connStatus.current, "可用 available:", connStatus.available);

// 统计每个客户端 IP 当前连接数

db.adminCommand({
  aggregate: 1,
  pipeline: [
    { $currentOp: { allUsers: true, localOps: true } },
    { $match: { client: { $exists: true } } },
    { $project: { ip: { $arrayElemAt: [ { $split: ["$client", ":"] }, 0 ] } } },
    { $group: { _id: "$ip", count: { $sum: 1 } } },
    { $sort: { count: -1 } }
  ],
  cursor: {}
}).cursor.firstBatch.forEach(doc => printjson(doc));