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OpsWorks Basics

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Here, we will understand the basics of OpsWorks.

  • It is a configuration management service
  • configure and operate applications in AWS by using
    • Chef
    • Puppet
  • There are 2 variants: AWS OpsWorks Stacks and AWS OpsWorks for Chef Automate.
  • OpsWorks Stacks Chef Automate can use Chef cookbooks
  • Puppet Enterprise configure Puppet Enterprise master server in AWS.

OpsWorks Structure

  • OpsWorks Stack – collection of resources for specific purpose
  • OpsWorks Layer – set of shared functionailty applied to a group of components
  • OpsWorks Instance – actaul units of compute; inherits some from stack/layer
  • OpsWorks Application – app deployed into one or more instances

OpsWorks Details

  • OpsWorks Agent –
    • CHEF, responsible for configuration/reconfiguration of machines as per recipes
  • OpsWorks Automation Engine –
    • responsible for creating, deleting, updating EC2 instances and other services; handle load balancing, Autoscaling, Auto healing, Lifecycle events
  • Recipes & Cookbooks – Desired state engines;
    • Recipes tell OpsWorks WHAT you want the end result to be; Cookbooks contain recipes and all associated data to support them.

AWS OpsWorks for Puppet Enterprise

  • Can create AWS-managed Puppet master servers
  • A Puppet master server can
    • manages nodes
    • stores facts about those nodes
    • serve as central repository for Puppet modules.
  • Puppet modules are Puppet code for infrastructure configuration, which are
    • Reusable
    • shareable units
  • For custom modules
    • Download community modules from Puppet Forge
    • Can also use Puppet Development Kit
  • manage module deployment with Puppet Code Manager.
  • Use Puppet to automate how nodes are
    • Configured
    • Deployed
    • Managed
  • Full-stack automation is provided which includes
    • software and operating system configurations
    • package installations
    • database setups
    • change management
    • policy enforcement
    • monitoring

AWS OpsWorks for Chef Automate

  • Create AWS-managed Chef servers having Chef Automate premium features
  • Use the Chef DK and other Chef tooling
  • A Chef server is used to
    • manage nodes in AWS
    • stores information about those nodes
    • serve as central repository for Chef cookbooks
  • Cookbooks contain recipes executed by Chef Infra client agent on each node
  • Available Chef tools to manage nodes and cookbooks on a Chef server
    • knife
    • Test Kitchen
  • Chef Automate installs and manages
    • Chef Automate
    • Chef Infra
    • Chef InSpec
  • Can also use community-authored or custom Chef cookbooks

AWS OpsWorks Stacks

  • AWS involves groups of resources, and group of instances is called stack.
  • OpsWorks Stacks, creates and manages stacks and applications.
  • Deploy and monitor applications in stacks.
  • Manage AWS resources in specialized groups called layers.
  • A layer is a set of EC2 instances serving a particular purpose like database, web hosting
  • Does not require or create Chef servers
  • Can be accessed globally
  • use to create and manage instances globally
  • Can integrate with IAM for resource access control
  • Stacks can
    • monitor instance health
    • provision new instances, if needed
    • makes use of Auto Healing and Auto Scaling.
OpsWorks

Opsworks Events

  • Events can run manually using events stack run command functionality; When event occurs it runs set of recipes assigned to that event.
  • Each layer has own recipes for that event.
  • SETUP – Occurs when an instance has finished booting
  • CONFIGURE – Occurs when instance enters/leaves online, associate/disassociate EIP, attach/detach LB to a layer
  • DEPLOY – Occurs when run the deploy command on an instance
  • UNDEPLOY – Occurs when delete an application or run Undeploy command
  • SHUTDOWN – Occurs when an instance is shutdown, but before its terminated; allows cleanup by running recipes
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