A CDK Construct Library to automate the creation and renewal of Let's Encrypt certificates.
- Creates a lambda function that utilizes Certbot to request a certificate from Let's Encrypt
- Uploads the resulting certificate data to S3 for later retrieval
- Imports the certificate to AWS Certificate Manager for tracking expiration
- Creates a trigger to re-run and re-new if the cert will expire in the next 30 days (customizable)
See API
Original [gist](# Modified from original gist https://gist.github.com/arkadiyt/5d764c32baa43fc486ca16cb8488169a) that was modified for the Lambda code
This construct utilizes a Route 53 hosted zone lookup so it will require that your stack has [environment variables set for account and region](See https://docs.aws.amazon.com/cdk/latest/guide/environments.html for more details.).
import * as cdk from '@aws-cdk/core';
import { Certbot } from '@renovosolutions/cdk-library-certbot';
import { Architecture } from '@aws-cdk/aws-lambda';
export class CdkExampleCertsStack extends cdk.Stack {
constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
super(scope, id, props);
let domains = [
'example.com',
'www.example.com'
]
new Certbot(this, 'cert', {
letsencryptDomains: domains.join(','),
letsencryptEmail: '[email protected]',
hostedZoneNames: [
'example.com'
]
})
}
}import * as cdk from '@aws-cdk/core';
import { Certbot, CertificateStorageType } from '@renovosolutions/cdk-library-certbot';
import { Architecture } from '@aws-cdk/aws-lambda';
export class CdkExampleCertsStack extends cdk.Stack {
constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
super(scope, id, props);
let domains = [
'example.com',
'www.example.com'
]
new Certbot(this, 'cert', {
letsencryptDomains: domains.join(','),
letsencryptEmail: '[email protected]',
hostedZoneNames: [
'example.com'
]
certificateStorage: CertificateStorageType.SECRETS_MANAGER
// Optional path
secretsManagerPath: '/path/to/secret/'
})
}
}import * as cdk from '@aws-cdk/core';
import { Certbot, CertificateStorageType } from '@renovosolutions/cdk-library-certbot';
import { Architecture } from '@aws-cdk/aws-lambda';
export class CdkExampleCertsStack extends cdk.Stack {
constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
super(scope, id, props);
let domains = [
'example.com',
'www.example.com'
]
new Certbot(this, 'cert', {
letsencryptDomains: domains.join(','),
letsencryptEmail: '[email protected]',
hostedZoneNames: [
'example.com'
]
certificateStorage: CertificateStorageType.SSM_SECURE
// Optional path
ssmSecurePath: '/path/to/secret/'
})
}
}import * as cdk from '@aws-cdk/core';
import * as route53 from '@aws-cdk/aws_route53';
import { Certbot } from '@renovosolutions/cdk-library-certbot';
import { Architecture } from '@aws-cdk/aws-lambda';
export class CdkExampleCertsStack extends cdk.Stack {
constructor(scope: cdk.Construct, id: string, props?: cdk.StackProps) {
super(scope, id, props);
const hostedZone = new r53.HostedZone(this, 'authZone', {
zoneName: 'auth.example.com',
});
let domains = [
'example.com',
'www.example.com',
'auth.example.com'
]
new Certbot(this, 'cert', {
letsencryptDomains: domains.join(','),
letsencryptEmail: '[email protected]',
hostedZoneNames: [
'example.com'
],
hostedZones: [
hostedZone,
]
})
}
}from aws_cdk import (
core as cdk
)
from certbot import Certbot
class CdkExampleCertsStack(cdk.Stack):
def __init__(self, scope: cdk.Construct, construct_id: str, **kwargs) -> None:
super().__init__(scope, construct_id, **kwargs)
Certbot(self, "certbot",
letsencrypt_email="[email protected]",
letsencrypt_domains="example.com",
hosted_zone_names=["example.com"]
)- Set up a python virtual env with
python3.10 -m venv .venv - Use the virtual env with
source .venv/bin/activate - Install dependencies with
pip install -r function/tests/requirements.txt - Run
pytest -v
The testing using moto to mock AWS services and verify the function does what is expected for each given storage type.