123 lines
No EOL
3.7 KiB
Markdown
123 lines
No EOL
3.7 KiB
Markdown
## Introduction
|
||
|
||
python-terraform is a python module provide a wrapper of `terraform` command line tool.
|
||
`terraform` is a tool made by Hashicorp, please refer to https://terraform.io/
|
||
|
||
### Status
|
||
[](https://travis-ci.org/beelit94/python-terraform)
|
||
|
||
## Installation
|
||
pip install python-terraform
|
||
|
||
## Usage
|
||
####For any terraform command
|
||
|
||
from python_terraform import Terraform
|
||
t = Terraform()
|
||
return_code, stdout, stderr = t.<cmd_name>(*arguments, **options)
|
||
|
||
####For any argument
|
||
simply pass the string to arguments of the method, for example,
|
||
|
||
terraform apply target_dir
|
||
--> <instance>.apply('target_dir')
|
||
terraform import aws_instance.foo i-abcd1234
|
||
--> <instance>.import('aws_instance.foo', 'i-abcd1234')
|
||
|
||
####For any options
|
||
|
||
* dash to underscore
|
||
|
||
remove first dash, and then use underscore to replace dash symbol as option name
|
||
|
||
ex. -no-color --> no_color
|
||
|
||
* for a simple flag option
|
||
|
||
use ```IsFlagged/None``` as value for raising/not raising flag, for example,
|
||
|
||
terraform taint -allow-missing
|
||
--> <instance>.taint(allow＿missing=IsFlagged)
|
||
terraform taint
|
||
--> <instance>.taint(allow＿missing=None) or <instance>.taint()
|
||
terraform apply -no-color
|
||
--> <instance>.apply(no_color=IsFlagged)
|
||
|
||
* for a boolean value option
|
||
|
||
assign True or False, for example,
|
||
|
||
terraform apply -refresh=true --> <instance>.apply(refresh=True)
|
||
|
||
* if a flag could be used multiple times, assign a list to it's value
|
||
|
||
terraform apply -target=aws_instance.foo[1] -target=aws_instance.foo[2]
|
||
--->
|
||
<instance>.apply(target=['aws_instance.foo[1]', 'aws_instance.foo[2]'])
|
||
* for the "var" flag, assign dictionary to it
|
||
|
||
terraform apply -var='a=b' -var='c=d'
|
||
--> tf.apply(var={'a':'b', 'c':'d'})
|
||
* if an option with None as value, it won't be used
|
||
|
||
## Examples
|
||
### Have a test.tf file under folder "/home/test"
|
||
#### 1. apply with variables a=b, c=d, refresh=false, no color in the output
|
||
In shell:
|
||
|
||
cd /home/test
|
||
terraform apply -var='a=b' -var='c=d' -refresh=false -no-color
|
||
|
||
In python-terraform:
|
||
|
||
from python_terraform import Terraform
|
||
tf = Terraform(working_dir='/home/test')
|
||
tf.apply(no_color=IsFlagged, refresh=False, var={'a':'b', 'c':'d'})
|
||
|
||
or
|
||
|
||
from python_terraform import Terraform
|
||
tf = Terraform()
|
||
tf.apply('/home/test', no_color=IsFlagged, refresh=False, var={'a':'b', 'c':'d'})
|
||
|
||
or
|
||
|
||
from python_terraform import Terraform
|
||
tf = Terraform(working_dir='/home/test', variables={'a':'b', 'c':'d'})
|
||
tf.apply(no_color=IsFlagged, refresh=False)
|
||
|
||
#### 2. fmt command, diff=true
|
||
In shell:
|
||
|
||
cd /home/test
|
||
terraform fmt -diff=true
|
||
|
||
In python-terraform:
|
||
|
||
from python_terraform import Terraform
|
||
tf = terraform(working_dir='/home/test')
|
||
tf.fmt(diff=True)
|
||
|
||
## default values
|
||
for apply/plan/destroy command, assign with following default value to make
|
||
caller easier in python
|
||
|
||
1. ```input=False```, in this case process won't hang because you missing a variable
|
||
1. ```no_color=IsFlagged```, in this case, stdout of result is easier for parsing
|
||
|
||
## Implementation
|
||
IMHO, how terraform design boolean options is confusing.
|
||
Take `input=True` and `-no-color` option of `apply` command for example,
|
||
they're all boolean value but with different option type.
|
||
This make api caller don't have a general rule to follow but to do
|
||
a exhaustive method implementation which I don't prefer to.
|
||
Therefore I end-up with using `IsFlagged` or `IsNotFlagged` as value of option
|
||
like `-no-color` and `True/False` value reserved for option like `refresh=true`
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
||
|
