Alibaba Cloud DNS:ListCloudGtmMonitorTemplates

The unique ID of the health check template.

The time when the health check template was created.

The timestamp that indicates when the health check template was created.

The time when the health check template was last modified.

The timestamp that indicates when the health check template was last modified.

The name of the health check template.

The IP version of the detection points.

• IPv4: The destination address is an IPv4 address.

• IPv6: The destination address is an IPv6 address.

The protocol used for the health check.

• ping

• tcp

• http

• https

The health check interval, in seconds. The default value is 60. The minimum interval of 15 seconds is available only for Ultimate Edition instances.

The timeout period for a health check, in milliseconds. If a response is not received within this period, the health check is considered to have timed out. Valid values:

• 2000

• 3000

• 5000

• 10000

The number of consecutive times a health check must fail before the system declares the service unhealthy. This helps prevent false alarms caused by network jitter. Valid values:

• 1

• 2

• 3

The failure rate threshold. If the percentage of unhealthy detection points exceeds this threshold, the system declares the endpoint unhealthy. Valid values:

• 20

• 50

• 80

• 100

Extended information in a JSON string. The available parameters vary based on the protocol:

• For HTTP and HTTPS:

  host: The value of the Host field in the HTTP or HTTPS request header. This field specifies the website to access. The default value is the primary domain name. Modify this parameter if the destination website has specific host requirements.

  path: The path for the HTTP or HTTPS health check. The default path is /.

  code: The HTTP status code threshold. During an HTTP or HTTPS health check, the system checks the returned status code. If the code is greater than the specified value, the application service is considered unhealthy.

  • 400: Bad Request. A web server returns a status code greater than 400 if a request contains incorrect parameters. If you set the threshold to 400, make sure to specify the correct URL path parameters.

  • 500: Server Error. A web server returns a status code greater than 500 if a server-side exception occurs. By default, the system uses 500 as the threshold.

  sni: Specifies whether to enable Server Name Indication (SNI). This parameter applies only to the HTTPS protocol. SNI is an extension to the Transport Layer Security (TLS) protocol. It allows a client to specify the hostname it wants to connect to at the start of the TLS handshake. This lets the server present the correct certificate for the requested service.

  • true: enabled

  • false: disabled

  followRedirect: Specifies whether to follow 3xx redirections.

  • true: The system follows the redirection if the status code returned by the detection point is 3xx (301, 302, 303, 307, or 308).

  • false: The system does not follow the redirection.

• For ping:

  packetNum: The number of Internet Control Message Protocol (ICMP) packets to send for each ping health check. Valid values: 20, 50, and 100.

  packetLossRate: The packet loss rate threshold that triggers an alarm. The system calculates the packet loss rate for each ping health check. Packet loss rate = (Number of lost packets / Total number of sent ICMP packets) × 100%. An alarm is triggered if the packet loss rate reaches the specified threshold. Valid values: 10, 30, 40, 80, 90, and 100.

The remarks on the health check template.