Creating HTTP Health Checks

An HTTP health monitor sends either an HTTP or HTTPS request to the server. The health monitor then examines the response received from the server. The validation is successful if the server returns a response with the expected result code. The HTTP/HTTPS monitor can validate the response code and response content. The response content is checked only when the response code is valid.

Complete the following steps to create an HTTP Health Check monitor:

1. Go to Configure > Networking > DNS > DTC > DTC Health Checks.

2. Click Create DTC Health Check > HTTP.

3. Configure the following in the HTTP Health Monitor dialog:

   • Name: Enter a name for the HTTP health monitor.

   • Description: Enter a description for the health monitor.

   • Use HTTPS: Toggle to Enabled to use HTTPs.

   • Port: Specify a port number.

   • HTTP Request: Specify the HTTP request.

   • Status Code(s): Choose Any for any status code. Choose Equal and specify the status codes.

   • Interval (seconds): Enter the interval value in seconds. The health monitor runs only for the specified interval and it is measured from the begining of the previous monitor cycle. The default value is 15.

   • Timeout (seconds): Enter the timeout value in seconds. The monitor waits for the number of seconds that you specify after sending a request. If the monitor does not receive a response within the number of seconds that you specify, then it considers this check as failed. The monitor discards any response it receives after the timeout. The default value is 10.

   • Retries for Healthy Status: Enter an integer value. This value determines how many valid responses or good health checks in a row must be received by the monitor from the DTC server.

   • Retries for Down Status: Enter an integer value. It is the opposite of the Retries for Healthy Status count. This value determines how many unhealthy status health checks (server is unavailable) in a row must be collected by the monitor from the DTC server.

   • Response Content: Configure the following to search in the response content.

     • Do not check the response content: Choose this option if you do not want to search the response content.

     • Search for a string in the response content: Choose this option to search for the response content and choose where to search:

       • Header

       • Body

       • Both The Header And Body

     • Regular Expression: Click Add and configure a regular expression.

       • Header

       • Regular Expression

     • Content is valid if the regular expression is: Choose Found or Not found from the drop-down.

4. Click Save & Close.