9 min read

AWS Network Diagram Generator

August 5, 2021

AWS Network Diagram Generator

There are many reasons why you would want to accurately diagram and document your AWS environments. Knowing exactly what is running based on the actual resources configured in your AWS environments is probably the number one reason to use automated AWS Network Diagram Generator software over manually drawn diagrams.

The automation process discovers exactly what is running in your AWS account as well as Azure and GCP, so you can provide the information and documentation to onboard engineers faster, get to grips with new client networks or report to management in an easily understood visual format.

AWS Network Diagram Generator

Sitting down with a drawing package like Visio or Lucidchart and your AWS Icon template pack is a daunting prospect. It's even more challenging if your AWS environment contains more than a handful of VPC's, EC2 instances or a load balancer or two.

Not only do you need to manually draw out your VPC's and resources which can take hours or even days, once you have drawn the diagrams, you then need to keep them up to date if they are going to be of any practical use. As we all know, the minute you think you have your diagrams up to date, something changes or autoscales and your diagrams are out of date.  That's where using an automated AWS diagram generator comes into play.

AWS Network Architecture Diagrams

There are a number of Hava diagrams that can prove useful to your engineering and DevOps team. These include an AWS Infrastructure diagram like this:

AWS_Environment_with_Attribute_Pane

The above diagram example logically lays out all the resources discovered when an AWS account is connected to Hava's AWS Network Diagram Generator. The main VPC denoted by the green border, is surrounded by associated resources like internet and VPN gateways, S3 Buckets, VPC endpoints, VPC peering connections, Elastic Beanstalk environments and so forth.

Within the VPC, the configured availability zones (AZs) are set out in columns that contain the individual subnets set up in those AZs.  All the resource instances contained in each subnet are visualized, as are any load balancers routing traffic to the various subnets.

When you have a diagram automatically created from configuration data, now you can interrogate of each of the resources to see the settings and associations related to it. By clicking on any of the individual instance icons, the attribute pane on the right then displays all the known details related to the resource.  Something that simply isn't possible with manually created drag-and-drop diagrams.

Automating the diagram build using an AWS Network Diagram Generator can also reveal resources you are paying for, but may not be aware of.  Long forgotten database instances and sometimes entire dev or test environments are regularly discovered by this automation process. One of our clients discovered a database instance that was unused and costing close to $3k per month, and had been for over 3 years!

Custom AWS Network Topology Diagram

There is always somewhat of a compromise when it comes to automatically generated documentation. The way that Hava discovers and builds diagrams is based at a VPC level. If more than one VPC is detected in your AWS cloud account, then one diagram set per VPC is created.

You may however want to combine two or more VPCs onto a single diagram, for instance if they both relate to the same project or application.  This can be achieved using the custom query search function built into hava.io.

AWS Network Topology Diagram Generator

multi_vpc_search

This custom query would create a new 'on-the-fly' custom diagram containing the two nominated AWS VPCs specified in the search.  You would then have the ability to save this diagram so it is retained in your dashboard until you choose to delete it.  As with all other diagrams generated by Hava, your custom AWS infrastructure diagram would keep itself up to date and retain a version history every time a resource change is detected.

AWS Running Components Diagram

Typically it is just not practical to include every single component onto an AWS network diagram. Take for instance network interfaces, volumes or WAF Rules. In a large network with hundreds or maybe thousands of these non essential components, trying to map out every single component would most likely make the diagram unreadable, or certainly too rammed full of unimportant resources to easily recognise the core components.

However, that's not to say you don't need to know about them.

Hava solves this issue by providing detailed components list that lists out every single resource detected.

List_View_New_UI

This comprehensive list of resources can also be sorted and exported along with estimated monthly costs so you can see at a glance what resources are costing you the most money. This detailed view is also interactive. Selecting a resource on the diagram will reveal all the known settings and associations that resource has.

AWS Security Group Diagrams

Another benefit of automating the discovery of your AWS environment diagrams with Hava is the ability to capture and visualize security group, traffic and open port details.

AWS Security Architecture Diagram

AWS Security View 800x600

With the Hava security group diagram you can view all of your configured security groups with the open ports overlaid to enable an instant visual snapshot of the traffic flow, ingress and egress points. The security group diagram being interactive ensures you can select a particular security group on the diagram and view important information relating to the group, like the connected resources, ingress and egress ports, IP addresses and associated tags.

AWS ARCHITECTURE DIAGRAM VERSION COMPARISON

Hava continuously scans your AWS architecture and when changes are detected a new diagram set is automatically generated. The superseded diagrams are not discarded or overwritten. Instead they are moved into version history. Still fully interactive.

What this means is you can view your cloud architecture at any point in time and also leverage Hava's revision comparison (Diff Diagrams) to quickly identify what has been added or removed between the two diagram dates.

Diff_View-1 

So you can easily identify all the changes made since your last compliance audit, or see what changed yesterday that is causing unexpected network or application errors.

AWS ARCHITECTURE MONITORING

While diff diagrams are super helpful in diagnosing changes after the fact, you may want to keep on top of changes as they happen.

Hava's architecture monitoring alerts will let you know the minute a change is detected. You simply nominate the environment you wish to monitor and add a group of recipients to receive the alerts. When a change is detected like the addition or removal of a resource, Hava will send each recipient a diff diagram showing the changes.

Alerts_Detail

Now you and your security team can be across every change as it happens so you can assess and take action if required.

AWS Trusted Advisor Compliance

Hava also provides AWS Compliance Reporting via a reporting module on the environments dashboard.

Reports_NewUI

The compliance report steps you through all the regions and resources you have configured and will draw your attention to adverse findings graded as high, medium or low and will also detail the reasoning behind the finding.

Automated AWS Diagram Updates

Finally, your documentation is only useful if it is accurate. It is quite possible to spend weeks manually constructing network topology documentation only to have it rendered useless by a minor change to your network configuration.

In the middle of an outage or network incident that has taken down your application, being able to quickly establish what should be running is crucial.

Built into Hava is an auto-sync function that polls connected data sources and automatically updates diagram sets when changes are detected.  This means your diagrams are always current and up to date. The superseded diagram sets aren't discarded however. They are placed into a version history that enables you to pull up older diagrams in the same fully interactive format.

This allows you to quickly and visually identify changes to your cloud network topology, so you can easily compare a previously working set of network resources with the current configuration to see what's missing .

It also allows you to demonstrate the status of your network at any point in history. This can be invaluable during a pci compliance audit or insurance claim should your network design ever be called into question.  

Exporting Generated AWS  Diagrams

Native AWS architecture diagrams created by Hava are the nearest we've seen to the examples and recommendations provided by AWS.  These are great to view and interrogate via the interactive dashboard, however sometimes you'll need to pull a set of diagrams for audit purposes or for management or sales presentations.

Hava's built-in export function allows you to do this in a number of formats.

Export-diagram-formats

CSV, VSDX, JSON, PDF and PNG

Editing AWS Network Diagrams

Should you want to manipulate or embellish your Hava generated diagrams, exporting to VSDX format and using Visio, draw.io or any VSDX compatible drawing package will allow you to edit your diagrams as required.  

Should you not have access to Visio but would like to try this out, try opening one of your exported VSDX files in draw.io

exported_hava_diagram_in_drawio

Getting Hava to do the bulk of the heavy lifting by initially generating accurate diagrams based on what is actually configured and running in your AWS environment enables you to access a base diagram ready to edit which will save you hours or possibly days preparing management reports or upgrade plans.

In Conclusion.

There aren't too many engineers that would dispute the benefits of perpetually accurate network topology documentation.  Hava provides just this with:

  • Auto generation of documentation for your AWS environments (as well as GCP & Azure)
  • Keeps the diagram sets updated
  • Retains a full set of diagrams in version history every time a resource changes
  • Provides a comprehensive API to allow IaC build pipeline integration
  • Provides a unique security view detailing security groups with visualized traffic ingress/egress
  • Coming soon true 3d and separate compliance reporting  
  • Available as SaaS or fully self-hosted

 

You can find out more about Hava here:

 

 

See also : What is AWS EC2 Auto Scaling

Team Hava

Written by Team Hava

The Hava content team

Featured