Terrafrom: Up & Rnning, 2nd Edition
October 24, 2020•760 words
Terrafrom
How Terraform works
- Written in Go
- Compiles to one binary
Terraform Configurations
1.Text files that specify what infrastructure you want to create. These configurations are the “code” in “infrastructure as code.
2.Example below
resource 'aws_instance' 'example' {
ami = 'ami-0c55b159cbfafe1f0'
instance_type = 't2.micro'
}
resource 'google_dns_record_set' 'a' {
name = 'demo.google-example.com'
managed_zone = 'example-zone'
type = 'A'
ttl = 300
rrdatas = [aws_instance.example.public_ip]
}
Terraform Comparsions
- Lots of IAC providers on the market a list is below
- Terraform, Chef, Puppet, Ansible, SaltStack, CloudFormation, and OpenStack Heat
- What makes Terrform special or the IAC of choose for a large enterprise
What to look for: main trade-offs to consider:
a. Configuration management versus provisioning
b. Mutable infrastructure versus immutable infrastructure
c. Procedural language versus declarative language
d. Master versus masterles
e. Agent versus agentless
f. Large community versus small community
g. Mature versus cutting-edge
h. Using multiple tools together
Configuration Management Versus Provisioning
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