Configuration Management:
Configuration Management is the process of managing and maintaining the state of servers and infrastructure components. Puppet allows administrators to define and enforce desired configurations for servers and applications, ensuring consistency and reliability across environments.
Infrastructure as Code (IaC):
Infrastructure as Code is a practice of managing infrastructure configurations using code and automation. With Puppet, infrastructure configurations are defined in code using Puppet's declarative language (Puppet DSL), allowing administrators to automate the provisioning and configuration of servers and services.
Puppet Master:
Puppet Master is the central server that controls and manages Puppet agents deployed on managed nodes (servers). It stores configuration manifests and modules, compiles them into catalogs, and distributes them to Puppet agents for enforcement.
Puppet Agent:
Puppet Agent is the software installed on managed nodes (servers) that communicates with the Puppet Master server to retrieve configuration instructions and apply them to the local system. Puppet agents periodically contact the Puppet Master to ensure that the system's configuration remains in the desired state.
Manifests:
Manifests are files written in Puppet's declarative language (Puppet DSL) that define the desired state of resources and configurations on managed nodes. Manifests contain declarations of resources such as files, packages, services, users, and groups, along with their desired states and dependencies.
Modules:
Modules are reusable units of Puppet code that encapsulate configurations, templates, files, and other resources related to specific tasks or services. Puppet modules help organize and manage configuration code efficiently, allowing administrators to share and reuse configurations across multiple environments.
Facter:
Facter is a system profiling tool used by Puppet to gather information about managed nodes (servers). Facter collects system facts such as operating system details, hardware information, network configurations, and custom facts defined by administrators. Puppet uses these facts to make decisions during configuration enforcement.
Puppet Forge:
Puppet Forge is a repository of pre-built Puppet modules contributed by the community and Puppet Inc. Puppet administrators can browse, download, and install modules from Puppet Forge to automate common tasks, configure applications, and manage infrastructure components.
PuppetDB:
PuppetDB is a data warehouse and storage service used by Puppet to store and query data about managed nodes, resources, and configuration changes. PuppetDB provides a centralized database for Puppet infrastructure, enabling reporting, analytics, and integration with external tools.
Hiera:
Hiera is a key-value lookup tool used by Puppet to manage configuration data separately from Puppet manifests. Hiera allows administrators to store configuration data in YAML or JSON files, organized in a hierarchical structure, and retrieve them dynamically based on node-specific or environment-specific variables.
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