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https://github.com/jamesmoriarty/cfn-cheapest-nat
Cheapest AWS VPC NAT.
https://github.com/jamesmoriarty/cfn-cheapest-nat
amazon-web-services cloudformation nat network-address-translation
Last synced: about 2 months ago
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Cheapest AWS VPC NAT.
- Host: GitHub
- URL: https://github.com/jamesmoriarty/cfn-cheapest-nat
- Owner: jamesmoriarty
- License: mit
- Created: 2019-08-05T00:10:42.000Z (about 5 years ago)
- Default Branch: master
- Last Pushed: 2021-05-11T10:46:03.000Z (over 3 years ago)
- Last Synced: 2024-07-27T20:47:53.545Z (about 2 months ago)
- Topics: amazon-web-services, cloudformation, nat, network-address-translation
- Homepage:
- Size: 36.1 KB
- Stars: 36
- Watchers: 3
- Forks: 1
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
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README
# cfn-cheapest-nat
[![build status][3]][4]
Cheapest AWS VPC NAT solution for personal projects.
## Context
The current solutions *is*:
- EC2 running on Spot.
- Auto Healing
- automatically replaces the unhealthy instance.
- re-attaches a persistent network interface to recover transport level details such as routes.
The solution is *not*:
- Highly Available
- instance unavailability will cause NAT disruption.
- Fault Tolerant
- the persistent network interface results in dependency on a single zone.
## Logical Diagram
## Deploy
```
STACK_NAME=examples-nat \
PRIVATE_ROUTE_TABLES=rtb-0eee90cf29e333813,rtb-0c1d060b614e74b88 \
PUBLIC_SUBNET=subnet-03ad595bb28ce7679 \
./bin/deploy
```
## Testing
I use the AWS System Manager Session Manager to SSH into an instance in a private subnet utilizing the NAT and run:
```
yum install python python-pip -y \
&& pip install --upgrade pip \
&& pip install speedtest-cli \
&& speedtest-cli
Retrieving speedtest.net configuration...
Testing from Amazon.com (54.206.26.162)...
Retrieving speedtest.net server list...
Selecting best server based on ping...
Hosted by Telstra (Sydney) [1.01 km]: 1.82 ms
Testing download speed................................................................................
Download: 3283.42 Mbit/s
Testing upload speed................................................................................................
Upload: 2274.26 Mbit/s
```
[1]: https://docs.aws.amazon.com/vpc/latest/userguide/vpc-nat-gateway.html
[2]: https://docs.aws.amazon.com/vpc/latest/userguide/VPC_NAT_Instance.html
[3]: https://codebuild.us-east-1.amazonaws.com/badges?uuid=eyJlbmNyeXB0ZWREYXRhIjoiWVdkQTF5ekRUSm1FNjgxT0RsL0ZBanFER1dSRG1kQWI0VUNLS2NlS0EwZ0pjdmN5a1RVSGI5K2p5Ty9vZFVZZ2gxck1GOWM4bHJ3WC9VVzJhZDVieE9vPSIsIml2UGFyYW1ldGVyU3BlYyI6IlhoM1dkMGw4M3VFNXlZWU4iLCJtYXRlcmlhbFNldFNlcmlhbCI6MX0%3D&branch=master
[4]: https://console.aws.amazon.com/codesuite/codebuild/projects/examples-cheapest-nat/history?region=us-east-1
## Costs
|solution |network |cost/GB|cost/hour**|cost/month**|
|-----------------------------------|---------|-------|-----------|------------|
|[NAT Gateway][1] |5-45 Gbps| 0.059|0.059 |42.48 |
|[NAT Instance (t3a.nano)][2] |0-5 Gbps|0-0.114|0.0059 | 4.25 |
|[NAT Instance (t3a.nano) (spot)][2]|0-5 Gbps|0-0.114|0.0018* | 1.30* |
\* variable costs.
\*\* region ap-southeast-2.
## AMI
### Documentation
- [VPC NAT Instance Documentation](https://docs.aws.amazon.com/vpc/latest/userguide/VPC_NAT_Instance.html)
### Configuration
- /etc/sysctl.d/10-nat-settings.conf
- /usr/sbin/configure-pat.sh