When preparing for the CCNP 350-401 ENCOR exam, examinees must have a thorough understanding of both agent and agentless orchestration tools such as Chef, Puppet, Ansible and SaltStack. This blog post will explain the difference between agent-based and agentless orchestration tools, discuss the strengths and weaknesses of the four tools available to CCNP 350-401 ENCOR measurees, and provide examples of how each of these tools can be used to manage application deployments.
Understanding Agent and Agentless Orchestration Tools
Orchestration tools are essential tools that simplify the process of managing large-scale IT deployments and operations. These tools automate repetitive tasks, allowing teams to save time and improve the quality of their application deployments. Orchestration tools can be divided into two broad categories: agent and agentless.
Agent orchestration tools, such as Chef and Puppet, require the installation of an agent on each server that needs to be managed. This agent communicates with a central server and can be used to deploy and configure applications on the server. Agentless orchestration tools, such as Ansible and SaltStack, do not require an agent to be installed on the server. Instead, they communicate directly with the server using SSH or other methods.
Comparing Chef, Puppet, Ansible and SaltStack for the CCNP 350-401 ENCOR Exam
Chef
Chef is an agent-based orchestration tool that is designed to help users manage complex applications deployments. It uses a Domain Specific Language (DSL) to define the configuration of a server, and an agent on each managed server that communicates with a Chef server. Chef is powerful and can be used to build complex applications deployments from scratch, but it can be complex and time-consuming to learn.
Puppet
Puppet is another agent-based orchestration tool, but it uses a declarative language instead of a DSL. Like Chef, it requires an agent on each managed server, but its language is simpler and more intuitive than Chef's. Puppet also provides an extensive library of modules that can be used to quickly deploy and manage applications on a server.
Ansible
Ansible is an agentless orchestration tool that uses a simple, human-readable language to define configuration. Ansible is easy to learn and can deploy applications quickly, but it lacks the advanced features of Chef and Puppet. It also does not provide an extensive library of modules, which limits its ability to be used for complex deployments.
SaltStack
SaltStack is an agentless orchestration tool that uses a Python-based DSL to define configurations. Like Ansible, it is easy to learn, but it has more advanced features than Ansible. It is popular for managing large-scale deployments, but its programming language can be complex and time-consuming to learn.
Examples of Using Orchestration Tools for Deployments
Chef, Puppet, Ansible, and SaltStack can each be used to deploy applications. Here is an example of how each of these tools might be used for a deployment.
Chef
Chef can be used to deploy a web server. It requires the definition of a server configuration that defines the web server's characteristics, such as which type of web server to use and which packages to install. Once this configuration is defined, the Chef agent on the server can be used to deploy the server.
Puppet
Puppet can also be used to deploy a web server. Similar to Chef, it requires the definition of a server configuration, but it uses a declarative language instead of a DSL. Once this configuration is defined, the Puppet agent can be used to deploy the server. Puppet also provides a library of modules that can be used to quickly deploy and configure a server.
Ansible
Ansible can be used to deploy a web server, but it does not require an agent to be installed on the server. Instead, it uses SSH to communicate directly with the server and can be used to deploy a web server quickly and easily. Unlike Chef and Puppet, Ansible does not provide a library of modules, so complex deployments may require additional effort.
SaltStack
SaltStack can also be used to deploy a web server. It uses a Python-based DSL to define the configuration of the server and can be used to deploy a web server quickly and easily. However, it requires a more in-depth knowledge of Python than either Chef or Puppet.
Conclusion
For the CCNP 350-401 ENCOR exam, measurees must understand the differences between agent and agentless orchestration tools, such as Chef, Puppet, Ansible, and SaltStack. Each of these tools can be used for application deployments, but each has its own strengths and weaknesses. Chef and Puppet are powerful but complex and time-consuming to learn, while Ansible and SaltStack are easier to learn but lack advanced features.
For the exam, measurees should be familiar with how to use each of these tools to deploy applications. By understanding the capabilities of each of these tools, measurees will be better prepared to successfully pass the CCNP 350-401 ENCOR exam.