What are macros in Nagios?
What are macros in Nagios?
Standard Macros in Nagios
- Service checks.
- Service notifications.
- Host checks.
- Host notifications.
- Service event handlers and/or a global service event handler.
- Host event handlers and/or a global host event handler.
- OCSP command.
- OCHP command.
Which macros are used to pass arguments to command line during execution?
If you want to pass arguments to commands during runtime, you can use $ARGn$ macros in the command_line directive of the command definition and then separate individual arguments from the command name (and from each other) using bang (!)
Which macro is used to define the path to the plugins?
User macros
User macros are helpful in specifying paths to plugins and event handlers. In addition, user macros allow strings with illegal characters (such as ! and $) to be used in the Core Configuration Manager (CCM).
What is the difference between active and passive check in Nagios?
The major difference between active and passive checks is that active checks are initiated and performed by Nagios, while passive checks are performed by external applications.
What are macros in Linux?
A macro is a fragment of code which has been given a name. Whenever the name is used, it is replaced by the contents of the macro. There are two kinds of macros. They differ mostly in what they look like when they are used.
What is plugin in Nagios?
What Is A Plugin? Plugins are standalone extensions to Nagios Core that make it possible to monitor anything and everything with Core. Plugins process command-line arguments, perform a specific check, and then return the results to Nagios Core.
What is token macro?
Databinding Token Macro To simplify the development of custom tokens, a more convenient subtype called DataBoundTokenMacro is provided to simplify the parameter parsing. In this subtype, you get your parameters injected to your instance, so that your evaluate method can access parameter values in a type-safe manner.
Is Nagios push or pull?
Nagios uses agents that are installed on both the network elements and the components that it monitors; they collect data using pull methodology.
What is hard and soft state in Nagios?
There are two state types in Nagios Core – SOFT states and HARD states. These state types are a crucial part of the monitoring logic, as they are used to determine when event handlers are executed and when notifications are initially sent out.
How do I find macros in Linux?
A simple, quick way to find out where a macro has been defined is to redefine the macro and check compiler’s Warning/Error message….Finally my steps are:
- Use gcc -E -dD.
- Find the definition in the output file.
- Search backwards for # (a hash and a space) to reveal the file.
How do I install Nagios XI plugins?
Installing a new plugin in Nagios XI is very simple. Navigate to Admin > System Extensions > Manage Plugins. Click the Browse button to select the new plugin you want to install. Select the plugin file countdown_to_date.
Where are Nagios config files?
The main configuration file is usually named nagios. cfg and located in the /usr/local/nagios/etc/ directory.
What is difference between macros and function?
There are no such constraints in functions. The speed at which macros and functions differs….Conclusion:
| Macro | Function |
|---|---|
| Macros are Preprocessed | Functions are Compiled |
| No Type Checking is done in Macro | Type Checking is Done in Function |
| Using Macro increases the code length | Using Function keeps the code length unaffected |
What is ## in preprocessor?
This is called token pasting or token concatenation. The ‘ ## ‘ preprocessing operator performs token pasting. When a macro is expanded, the two tokens on either side of each ‘ ## ‘ operator are combined into a single token, which then replaces the ‘ ## ‘ and the two original tokens in the macro expansion.
