Terrafrom: Up & Rnning, 2nd Edition

Terrafrom


How Terraform works

  1. Written in Go
  2. 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

  1. Lots of IAC providers on the market a list is below
  2. Terraform, Chef, Puppet, Ansible, SaltStack, CloudFormation, and OpenStack Heat
  3. What makes Terrform special or the IAC of choose for a large enterprise
  4. 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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Typographic replacements

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(c) (C) (r) (R) (tm) (TM) (p) (P) +-

test.. test... test..... test?..... test!....

!!!!!! ???? ,, -- ---

"Smartypants, double quotes" and 'single quotes'

Emphasis

This is bold text

This is bold text

This is italic text

This is italic text

~~Strikethrough~~

Blockquotes

Blockquotes can also be nested...

...by using additional greater-than signs right next to each other...

...or with spaces between arrows.

Lists

Unordered

  • Create a list by starting a line with +, -, or *
  • Sub-lists are made by indenting 2 spaces:
    • Marker character change forces new list start:
    • Ac tristique libero volutpat at
    • Facilisis in pretium nisl aliquet
    • Nulla volutpat aliquam velit
  • Very easy!

Ordered

  1. Lorem ipsum dolor sit amet
  2. Consectetur adipiscing elit
  3. Integer molestie lorem at massa

  4. You can use sequential numbers...

  5. ...or keep all the numbers as 1.

Start numbering with offset:

  1. foo
  2. bar

Code

Inline code

Indented code

// Some comments
line 1 of code
line 2 of code
line 3 of code

Block code "fences"

Sample text here...

Syntax highlighting

var foo = function (bar) {
  return bar++;
};

console.log(foo(5));

Tables

Option Description
data path to data files to supply the data that will be passed into templates.
engine engine to be used for processing templates. Handlebars is the default.
ext extension to be used for dest files.

Right aligned columns

Option Description
data path to data files to supply the data that will be passed into templates.
engine engine to be used for processing templates. Handlebars is the default.
ext extension to be used for dest files.

Links

link text

link with title

Autoconverted link https://github.com/nodeca/pica (enable linkify to see)

Images

Minion
Stormtroopocat

Like links, Images also have a footnote style syntax

Alt text

With a reference later in the document defining the URL location:

Plugins

The killer feature of markdown-it is very effective support of
syntax plugins.

Emojies

Classic markup: :wink: :crush: :cry: :tear: :laughing: :yum:

Shortcuts (emoticons): :-) :-( 8-) ;)

see how to change output with twemoji.

Subscript / Superscript

  • 19th^
  • H~2~O

<ins>

++Inserted text++

<mark>

Marked text

Footnotes

Footnote 1 link1.

Footnote 2 link2.

Inline footnote[Text of inline footnote] definition.

Duplicated footnote reference2.

Definition lists

Term 1

: Definition 1
with lazy continuation.

Term 2 with inline markup

: Definition 2

{ some code, part of Definition 2 }

Third paragraph of definition 2.

Compact style:

Term 1
~ Definition 1

Term 2
~ Definition 2a
~ Definition 2b

Abbreviations

This is HTML abbreviation example.

It converts "HTML", but keep intact partial entries like "xxxHTMLyyy" and so on.

*[HTML]: Hyper Text Markup Language

Custom containers

::: warning
here be dragons
:::


  1. Footnote can have markup 

    and multiple paragraphs.

  2. Footnote text. 


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