Tips and Tricks

What is puppet exec?

What is puppet exec?

The Puppet client software is called the agent. The Puppet server is called the master. exec resources. We want Puppet to run a certain command directly using an exec resource. This is a very flexible and powerful resource, and we can use it to implement almost anything in Puppet.

How do you run a puppet with multiple commands?

1 Answer

  1. Just change the command line to add all the other commands ( cmd1 && cmd2 && cmd3 ).
  2. Use the unless or onlyif parameters, so as to check if your stored procedure or whatsoever already exists before running the command.
  3. Set refreshonly , and subscribe to the previous exec.

What is puppet agent?

Puppet agent is the application that manages the configurations on your nodes. It requires a Puppet primary server to fetch configuration catalogs from. Depending on your infrastructure and needs, you can manage systems with Puppet agent as a service, as a cron job, or on demand.

What does test do in bash?

In bash shell, the test command compares one element against another and returns true or false. In bash scripting, the test command is an integral part of the conditional statements that control logic and program flow.

How do you create a custom fact in puppet?

You can add custom facts by writing snippets of Ruby code on the primary Puppet server. Puppet then uses plug-ins in modules to distribute the facts to the client. For information on how to add custom facts to modules, see Module plug-in types.

What is Puppet architecture?

Puppet uses master-slave or client-server architecture. Puppet client and server interconnected by SSL, which is a secure socket layer. It is a model-driven system. Here, the client is referred to as a Puppet agent/slave/node, and the server is referred to as a Puppet master.

What can Puppet do?

Puppet can define infrastructure as code, manage multiple servers, and enforce system configuration. And oh, so much more. Puppet is one of the great DevOps programs for managing multiple servers. Once upon a time, we system administrators used shell scripts to run our servers.

What is operator in Bash?

Bash has a large set of logical operators that can be used in conditional expressions. There are three types of operators: file, numeric, and non-numeric operators. Each operator returns true (0) if the condition is met and false (1) if the condition is not met.

What is square brackets in Bash?

The square brackets are a synonym for the test command. An if statement checks the exit status of a command in order to decide which branch to take. grep -q “$text” is a command, but “$name” = ‘Bob’ is not–it’s just an expression.

How do you find puppet facts?

To see the fact values for a node, run facter -p on the command line, or browse facts on node detail pages in the Puppet Enterprise console.

How do you use puppet facts?

When you write Puppet code, you can access facts in two ways: with the $fact_name syntax, or with the $facts[‘fact_name’] hash.

What is Puppet enlist its features?

Puppet is an open-source DevOps system management tool. It is used to centralize and automate the configuration management procedure. This tool is developed using Ruby DSL (domain-specific language). Puppet tool deploys, configures, and manages the servers.

How to execute exec from a resource in puppet?

If Puppet is managing the user that an exec should run as, the exec resource autorequires that user. exec { ‘resource title’: command => # (namevar) The actual command to execute. Must either be… creates => # A file to look for before running the command… cwd => # The directory from which to run the command.

What is exec autorequires in puppet?

Autorequires: If Puppet is managing an exec’s cwd or the executable file used in an exec’s command, the exec resource autorequires those files. If Puppet is managing the user that an exec should run as, the exec resource autorequires that user. exec { ‘resource title’: command => # (namevar) The actual command to execute.

What are the onlyif and unless commands of Exec in puppet?

The onlyif and unless commands of an exec are used in the process of determining whether the exec is already in sync, therefore they must be run during a noop Puppet run. The exec has refreshonly => true, which allows Puppet to run the command only when some other resource is changed. (See the notes on refreshing below.)

What is the Test Command in puppet?

A test command that checks the state of the target system and restricts when the exec can run. If present, Puppet runs this test command first, and only runs the main command if the test has an exit code of 0 (success). For example: