Terraform

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Terraform

2. 2
Agenda
 Problems
 What’s Terraform?
 Key features & benefits
 Demo

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Provisioning Problems
 Provisioning of the past
• Manual
• Shell, Perl, Python scripts.
 Extra knowledge required => bottleneck for team growth
 Pure-ops task => devs & ops talking over a wall
 Provisioning today
• Chef, Puppet, Salt, Ansible
 Knowledge codified, faster, less error, devs and ops closer

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Provisioning Problems (cont)
 Infrastructure today

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What is Terraform?
 Terraform is a tool for provisioning infrastructure.
 A tool for building, changing, and versioning infrastructure safely and efficiently.
 Terraform provides a consistent workflow for operators to provision
infrastructure across public cloud, private cloud, and external services
 Open-source, written in Golang

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Key features
 Infrastructure as Code
• Infrastructure is described using a high-level configuration syntax.
• This allows a blueprint of your datacenter to be versioned and treated as you would any other
code.
• Additionally, infrastructure can be shared and re-used
 Execution Plans
• Terraform has a "planning" step where it generates an execution plan.
• The execution plan shows what Terraform will do when you call apply.
• This lets you avoid any surprises when Terraform manipulates infrastructure

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Key features (cont)
 Resource Graph
• Terraform builds a graph of all your resources, and parallelizes the creation and modification of
any non-dependent resources.
• Because of this, Terraform builds infrastructure as efficiently as possible, and operators get
insight into dependencies in their infrastructure
• Change Automation
• Complex changesets can be applied to your infrastructure with minimal human interaction.
• With the previously mentioned execution plan and resource graph, you know exactly what
Terraform will change and in what order, avoiding many possible human errors

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Why operators use Terraform?
Infrastructure as code
Enable automation and configuration reuse to quickly and safely provision
infrastructure at any scale.
 Human readable HashiCorp Configuration Language (HCL)
 Separate plan and apply phase
 Declarative configurations

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Why operators use Terraform? (cont)
Cloud platform management
A workflow to provision and manage any infrastructure without losing the full
capabilities of each cloud.
 70+ infrastructure providers
 1000+ resources
 Automatically reconcile dependencies

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Why operators use Terraform? (cont)
Self-service infrastructure
Provide verified modules to give Terraform users easy access to templates to set
up and run their cloud-based infrastructure.
 Module Registry with public UI
 Modules contributed by community & providers
 Clean code for simple reuse

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Demo