📶 Ping (ICMP) Monitor
The Ping monitor sends ICMP echo requests ("pings") to a host and measures whether it's reachable and how quickly it responds.
🎯 機能
- Sends ICMP echo requests to a hostname or IP address
- Measures average latency (round-trip time)
- Detects packet loss
- Works on both Linux and Windows servers
⚙️ 設定
| 設定 | 説明 | 例 |
|---|---|---|
| Name | A friendly name | Production Server |
| Host / IP Address | Hostname or IP to ping | 192.168.1.100 or server.example.com |
| Check Interval | How often to ping | 1 minute |
| Timeout | Max time to wait for response | 10 seconds |
📖 使用例
Example 1: Monitor a Server
| 設定 | 値 |
|---|---|
| Name | Web Server 1 |
| Address | 10.0.0.5 |
| Interval | 30 seconds |
Example 2: Monitor an External Host
| 設定 | 値 |
|---|---|
| Name | CDN Edge Node |
| Address | cdn.example.com |
| Interval | 1 minute |
📊 記録される内容
| メトリクス | 説明 |
|---|---|
| Status | Up or Down |
| Response Time | Average round-trip time in ms |
| Packet Loss | Percentage of lost packets |
| Error Message | Details if unreachable |
⚠️ 重要な注意事項
警告
Some hosting providers block ICMP! If ping monitors always show "down" but you can access the host via HTTP, your hosting provider likely blocks outbound ICMP. Use a TCP monitor instead.
備考
Ping on Linux requires privileges. Make sure the PHP process has permission to run ping. On most systems this works out of the box, but some hardened setups may need:
sudo setcap cap_net_raw+ep $(which ping)
💡 ヒント
- Ping only checks network reachability, not whether your application is working. Use HTTP monitors for application health.
- High ping latency might indicate network congestion or geographical distance.
- Combine Ping with HTTP monitors for a complete picture: Ping tells you if the server is reachable, HTTP tells you if the application is working.