pyvpc 0.1.1

Python AWS VPC CIDR available range finder with sub networks

PyVPC - CIDR free range resolver

Get available CIDR/sub networks ranges from your cloud network, This app will return all available networks that are not is use by a vpc, or sub network that are not is use inside a specific VPC.

It can also suggest networks, according to flags passed to this app, view examples below.

• Current version supports only AWS VPCs.

Install

pip install pyvpc

Usage

aws:

pyvpc aws [-h] [--cidr-range CIDR_RANGE]
          [--suggest-range {0-32}]
          [--num-of-addr NUM_OF_ADDR] [--output {json}]
          [--region REGION] [--all-regions] [--vpc VPC]

Examples

• Assuming there are two AWS VPCs with CIDRs: 10.20.0.0/16 and 10.30.0.0/16, executing command:

  pyvpc aws --cidr-range 10.0.0.0/8
  

  will return:

  | Lowest IP   | Upper IP       |   Num of Addr | Available   | ID                    | Name         |
  |-------------|----------------|---------------|-------------|-----------------------|--------------|
  | 10.0.0.0    | 10.19.255.255  |       1310720 | True        |                       |              |
  | 10.20.0.0   | 10.20.255.255  |         65536 | False       | vpc-Ec9hQfmjk4sPCH65c | lev-test-vpc |
  | 10.21.0.0   | 10.29.255.255  |        589824 | True        |                       |              |
  | 10.30.0.0   | 10.30.255.255  |         65536 | False       | vpc-4WNpVY5wCLmdqfJLy | dev-k8s      |
  | 10.31.0.0   | 10.255.255.255 |      14745600 | True        |                       |              |
  

• For example, a VPC with 10.50.0.0/16 cidr, executing command:

  pyvpc aws --vpc vpc-3w5cymcdnwjm389gq
  

  will return:

  | Lowest IP   | Upper IP      |   Num of Addr | Available   | ID                       | Name               |
  |-------------|---------------|---------------|-------------|--------------------------|--------------------|
  | 10.50.0.0   | 10.50.0.255   |           256 | True        |                          |                    |
  | 10.50.1.0   | 10.50.1.255   |           256 | False       | subnet-p7s6f7rsgrgtvr5fe | private-arie-test  |
  | 10.50.2.0   | 10.50.2.255   |           256 | False       | subnet-2nw28z822kcr9x726 | private-arie-test  |
  | 10.50.3.0   | 10.50.10.255  |          2048 | True        |                          |                    |
  | 10.50.11.0  | 10.50.11.255  |           256 | False       | subnet-3j744kpzmcg55qtza | public-arie-test   |
  | 10.50.12.0  | 10.50.12.255  |           256 | False       | subnet-6vjape4vfk4jhajg8 | public-arie-test   |
  | 10.50.13.0  | 10.50.20.255  |          2048 | True        |                          |                    |
  | 10.50.21.0  | 10.50.21.255  |           256 | False       | subnet-j8wv89u4u3v4kyqs7 | database-arie-test |
  | 10.50.22.0  | 10.50.22.255  |           256 | False       | subnet-7p4djeetkkkgmqqqk | database-arie-test |
  | 10.50.23.0  | 10.50.255.255 |         59648 | True        |                          |                    |
  

Suggest available networks:

For example we pass the --cidr-range 10.0.0.0/12 --suggest-range 14 value, on the first example (10.20.0.0/16 and 10.30.0.0/16 are reserved).

the result will be:

| Lowest IP   | Upper IP      |   Num of Addr | Available   | ID   | Name   |
|-------------|---------------|---------------|-------------|------|--------|
| 10.0.0.0    | 10.3.255.255  |        262144 | True        |      |        |
| 10.4.0.0    | 10.7.255.255  |        262144 | True        |      |        |
| 10.8.0.0    | 10.11.255.255 |        262144 | True        |      |        |
| 10.12.0.0   | 10.15.255.255 |        262144 | True        |      |        |

Or if adding --cidr-range 10.0.0.0/10 --num-of-addr 100000 (we need all available network that have at least hundred thousand addresses), the result will be :

| Lowest IP   | Upper IP      |   Num of Addr | Available   | ID   | Name   |
|-------------|---------------|---------------|-------------|------|--------|
| 10.0.0.0    | 10.15.255.255 |       1048576 | True        |      |        |
| 10.16.0.0   | 10.19.255.255 |        262144 | True        |      |        |
| 10.22.0.0   | 10.23.255.255 |        131072 | True        |      |        |
| 10.24.0.0   | 10.27.255.255 |        262144 | True        |      |        |
| 10.28.0.0   | 10.29.255.255 |        131072 | True        |      |        |
| 10.32.0.0   | 10.63.255.255 |       2097152 | True        |      |        |