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This plugin tests the HTTP service on the specified host. It can test normal (HTTP) and secure (HTTPS) servers, follow redirects, search for strings and regular expressions, check connection times, and report on certificate expiration times.

Some important options

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Debugging

Debugging with curl

If you have trouble using check_http, you can start to query the URL with curl:

curl -x 173.212.220.96:3128 https://www.google.de/ --verbose

Execute the active Check manually

There are several ways to access the command. One way is described here: Check Email (check_mail)

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OMD[mysite]:~/lib/nagios/plugins$ ./check_http '-u' 'https://www.google.de/' '--ssl' '--onredirect=follow' '-j' 'CONNECT' '--sni' '-p' '3128' '173.212.220.96' 'www.google.de'

For a detailed log, you can use --verbose at the end of the command:

OMD[mysite]:~/lib/nagios/plugins$ ./check_http '-u' 'https://www.google.de/' '--ssl' '--onredirect=follow' '-j' 'CONNECT' '--sni' '-p' '3128' '173.212.220.96' 'www.google.de' --verbose

For more information, you can use --help command flag.

OMD[mysite]:~/lib/nagios/plugins$ ./check_http --help

Debugging with curl

If you have trouble using check_http, you can start to query the URL with curl:

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Some important options

• • Address (name / IP or Proxy)  → If you need a proxy to access the domain
  • Virtual host → is necessary if you have multiple domains and one host running
  • How to handle redirect → How to handle redirected pages
  • Regular Expression to expect in content → 
  • HTTP Method → Set to CONNECT if you're using a proxy

  • Disable SSL/TLS hostname extension support (SNI) →
    
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