The ips are not infinite inside on a subnet and in AWS is not different, if you have a small subnet in your VPC and dont has available ips you can't deploy resources on this subnet, this can be tracked with this monitor and set a threshold to send a notification for everybody involved with this.
This CDK stack deploy all resources to track available ips for every subnet in all or selected VPC (by config), scheduled Lambda with a rule from EventBridge and send custom metrics to CloudWatch for storage and feed the alarms to send notification to SNS when the threshold is reached.
- node 16 and npm
- python 3.7+
- AWS Account to deploy
- Create a python environment and activate
virtualenv .venv | source .venv/bin/activate - Install python requirements
pip install -r requirements.txt - Install npm packages
npm install
*If the AWS account are new or never deploy a CDK stack need run the command cdk bootstrap to prepare the account for deploy with CDK
On the context in the cdk.json can you set this options
vpcs: the list fo allVPCto track theirsubnets.- options:
- "vpc-01e52581bab413b49,vpc-01e52581bab413b49" separated by comma
- "all"
- options:
emailSubscription: the email for send notifications separated by comma.alarmThreshold: the threshold to send the notifications.
Example
...
"context": {
"vpcs": "all",
"emailSubscription": "[email protected]",
"alarmThreshold": 50
}
...Deploy cdk deploy
Destroy cdk destroy
AWS have a service for monitor every ip on your subnet, IPAM but is not free and have a lot of features for this or more.