You can create health check for an address pool to monitor each IP address in the pool separately and obtain the running status of the application services corresponding to the IP addresses. When a monitored IP address encounters an exception, the address will be blocked until it is restored.
Set a health check name that is easy to recognize. It can contain both Chinese and English characters.
Target IP addresses are monitored using ping. The metrics include network accessibility, packet loss rate, and latency.
Indicates the number of ping data packets sent during ping monitoring. It is used to calculate the packet loss rate. Optional values are 20, 50, and 100.
The system calculates the packet loss rate of ping data packets sent during ping monitoring. Packet loss rate = (Number of lost data packets/Number of ping packets) × 100%. An alarm is triggered when the packet loss rate threshold is reached. Packet Loss Rate can be set to 10%, 30%, 50%, 80%, 90%, or 100%.
The time of responding to sent ping data packets is calculated during ping monitoring. Health check is deemed to have timed out when no response packet is returned within the time-out period. The time-out period can be set to 2, 3, 5, or 10, in seconds.
During ping monitoring, the system determines that an application service is abnormal only after consecutive exceptions have occurred. This prevents transient jitters and other causes from affecting monitoring accuracy. Continuous Failed Attempts can be set to 1, 2, or 3 times.
- 1 times: An application service is deemed abnormal when health check detects one alarm.
- 2 times: An application service is deemed abnormal when health check detects two alarms.
- 3 times: An application service is deemed abnormal when health check detects three alarms.
The failure rate is the proportion of abnormal metrics to the total metrics of health check during ping monitoring. When the failure rate exceeds the configured threshold, the system determines that the application service is abnormal. Failure Rate can be set to 20%, 50%, 80%, or 100%.
A monitored node is the geographic location of the node that executes ping monitoring. The default monitored nodes are:
|BGP Nodes||Zhangjiakou、 Qingdao、Hangzhou、Shanghai、Hohhot、Shenzhen、Beijing|
|Overseas Nodes||Hong Kong、Germany、Singapore、Silicon Valley、Australia、Malaysia、Japan|
|ISP Nodes||ChinaUnicomWuhan、ChinaUnicomDalian、ChinaUnicomNanjing、ChinaUnicomTianjin、 ChinaTelecomQingdao、ChinaTelecomChangsha、ChinaTelecomXian、ChinaTelecomZhengzhou、ChinaMobileWuhan、ChinaMobileGuangzhou、ChinaMobileDalian、ChinaMobileNanjing|