What are resources? How do you handle system resources in Puppet?

1.	What are resources? How do you handle system resources in Puppet?
Answer» System resources are the key elements of a Puppet code that defines the architecture and manages the configuration of a system infrastructure. Puppet has its own DML (DECLARATIVE MODELLING Language) to write code. The main unit of code is called a resource. Puppet uses various types of resources to define the different definitions and parameters of a system. Here is how a resource is written: resource_type { ‘resource_name’: attribute => value, attribute => value, … } Each resource has 3 items: Resource_type, resource_name and the attributes. Example: user { ‘Jack’: ensure => present, owner => ‘root', group => ‘home’, mode => 0644, shell => ‘/bin/bash’ } This code evaluates as: Resource type ‘user’ with the resource parameter ‘Jack’ have the attributes: ‘ensure’, ‘owner’, ‘group’, ‘mode’ and ‘shell’. These attributes have the respective values. We can get a list of all the available resource types with the command: puppet describe --list Some of the common resource types are: user PACKAGE exec file service Example of resource_type: ‘service’. This resource ensures that the service: ‘network’ is RUNNING service {‘network’ : ensure => running } This resource checks the ‘package’: ‘apache’ is running and its pre-requisite requires ‘apt-update’ command to be executed. package { ‘apache’ : require => Exec[‘apt-update’], ensure => running }

Answer»

System resources are the key elements of a Puppet code that defines the architecture and manages the configuration of a system infrastructure.

Puppet has its own DML (DECLARATIVE MODELLING Language) to write code.
The main unit of code is called a resource.
Puppet uses various types of resources to define the different definitions and parameters of a system.

Here is how a resource is written:

resource_type { ‘resource_name’: attribute => value, attribute => value, … }

Each resource has 3 items: Resource_type, resource_name and the attributes.

Example:

user { ‘Jack’: ensure => present, owner => ‘root', group => ‘home’, mode => 0644, shell => ‘/bin/bash’ }

This code evaluates as:
Resource type ‘user’ with the resource parameter ‘Jack’ have the attributes: ‘ensure’, ‘owner’, ‘group’, ‘mode’ and ‘shell’.

These attributes have the respective values.

We can get a list of all the available resource types with the command:

puppet describe --list

Some of the common resource types are:

user
PACKAGE
exec
file
service

Example of resource_type: ‘service’. This resource ensures that the service: ‘network’ is RUNNING service

{‘network’ : ensure => running } This resource checks the ‘package’: ‘apache’ is running and its pre-requisite requires ‘apt-update’ command to be executed. package { ‘apache’ : require => Exec[‘apt-update’], ensure => running }

What are resources? How do you handle system resources in Puppet?

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