jeanlouisferey / Aws Securitygroup Grapher
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aws-securitygroup-grapher
This ansible role gets information from an aws VPC and generate a graphical representation of security groups through a dot file rendered by Graphviz.
This role is inspired by https://github.com/jeanlouisferey/openstack-securitygroup-grapher which do the same for Openstack Tenants.
Requirements
Ansible, of course, because it's an Ansible role.
Boto library needs to be installed, as that is required by the EC2 Ansible modules.
To render (i.e. to draw and obtain a graphic file), Graphviz needs to be installed.
Role Variables
| Variable | Content |
|---|---|
| asggrapherAwsRegion | Name of aws region where your VPC is deployed. (mandatory) |
| asggrapherAwsVPC | Name of your VPC. (mandatory) |
| asggrapherShowDefault | Do you want to see default security group, default value: false |
| asggrapherShowInstances | Do you want to see instances with their security groups, default value: false |
| asggrapherServerLabel | Label for instances, used when asggrapherShowInstances = true, default value: Servers |
| asggrapherRankdir | See https://www.graphviz.org/doc/info/attrs.html#d:rankdir, default value: LR |
| asggrapherDotFileToRender | Path and name of generated dot file , default value: "./awsCloudGrapher.dot" |
| asggrapherFileToRender | Path and name of generated image file, default value: "./awsCloudGrapher.png" |
Example Playbook
aws-sg-grapher.yml:
---
- name: AWS Security group grapher
hosts: localhost
connection: local
gather_facts: false
roles:
- role: aws-securitygroup-grapher
asggrapherAwsRegion: "eu-west-1"
asggrapherAwsVPC: "TEST-VPC"
Run it with:
ansible-playbook aws-sg-grapher.yml
After some time, you'll have a awsCloudGrapher.png file with your sg graph.
Examples of generated images
How to read the graph
Ellipses are security groups.
The red arrows represent egress flows: for example, the UDP stream 53 is authorized as output of SG-VPC-INTERNAL to 10.xxx.yyy.zza.
The blue arrows represent ingress flows: for example, tcp stream 443 is allowed as input of SG-VPC-LB from any (0.0.0.0/0)
The arrow head is always on the security group which contains the rule represented by the arrow.
Full example
It shows a tenant with several security groups corresponding to the different functions of the machines present in the project.
Simpler example
It shows in particular a SG that accepts any input from any source and a SG that allows any output to any destination.
asggrapherShowDefault
With asggrapherShowDefault: true, you'll have on your graph all the SGs, included the default AWS SG:
asggrapherShowInstances
With asggrapherShowInstances: true, you'll have on your graph all the instances (VM) within SGs used by these instances.
asggrapherRankdir
With asggrapherRankdir: LR, left to right, RL, right to left, TB, top to bottom, BT, bottom to top, you can change the way to draw the graph.
LR example
TB example
Author Information
Jean-Louis FEREY
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