ACMagent - automates ACM certificates

ACM agents provides functionality to request and confirm ACM certificates using the CLI interface

Installation

$ pip install acmagent

Configuration

In order to approve ACM certificates, create and configure acmagent IMAP credentials file. By default acmagent loads configuration .acmagent file from the user's home folder for example: /home/john.doe/.acmagent. However, you have an option to specify a custom path to the credentials file.

# /home/john.doe/.acmagent

username: username@example.com
server: imap.example.com
password: mysecretpassword

Usage

Issuing ACM certificates

The simplest option to request ACM certificate is to specify --domain-name and/or --validation-domain parameters.

$ acmagent request-certificate --domain-name *.dev.example.com
12345678-1234-1234-1234-123456789012

$ acmagent request-certificate --domain-name *.dev.example.com --validation-domain example.com
12345678-1234-1234-1234-123456789012

Optionally, if you need to generate a certificate for multiple domain names you can provide the --alternative-names parameter to specify space separated alternative domain names.

$ acmagent request-certificate --domain-name dev.example.com --validation-domain example.com --alternative-names  www.dev.example.com ftp.dev.example.com
12345678-1234-1234-1234-123456789012

ACMAgent offers an option to specify JSON input file instead of typing them at the command line using --cli-input-json parameter.

• Generate CLI skeleton output

$ acmagent request-certificate --generate-cli-skeleton &> certificate.json

$ cat certificate.json
{
    "DomainName": "",
    "SubjectAlternativeNames": [],
    "ValidationDomain": ""
}

• Modify generated skeleton file using your preferred method
• Using --cli-input-json parameter specify path fo the certificate.json file

$ acmagent request-certificate --cli-input-json file:./certificate.json

Output

The request-certificate outputs ACM certificate id, it's the last part of the ARN arn:aws:acm:us-east-1:123456789012:certificate/12345678-1234-1234-1234-123456789012 you will need that id for a certificate approval process.

Approving ACM certificates

Before approving ACM issued certificate, please ensure that the credentials file has been setup. For gmail and yahoo enable access for 'less secure apps' (https://support.google.com/accounts/answer/6010255?hl=en-GB&authuser=1)

confirm-certificate

$ acmagent confirm-certificate --help
usage: acmagent confirm-certificate [-h] --certificate-id CERTIFICATE_ID
                                [--wait WAIT] [--attempts ATTEMPTS]
                                [--debug] [--credentials CREDENTIALS]
optional arguments:
-h, --help                      show this help message and exit
--certificate-id CERTIFICATE_ID Certificate id
--wait WAIT                     Timeout in seconds between querying IMAP server
--attempts ATTEMPTS             Number of attempts to query IMAP server
--debug (boolean)               Send logging to standard output
--credentials CREDENTIALS       Explicitly provide IMAP credentials file

Examples

Confirming a certificate using the default settings:

$ acmagent confirm-certificate --certificate-id 12345678-1234-1234-1234-123456789012

However, for most scenarios the recommended approach to specify custom values for --wait and --attempts parameters tailored for your IMAP server.

$ acmagent confirm-certificate --wait 10 --attempts 6 --certificate-id 12345678-1234-1234-1234-123456789012

In the situations when you can't use the default IMAP credentials file provide the --credentials parameter

$ acmagent confirm-certificate --certificate-id 12345678-1234-1234-1234-123456789012 --credentials file:///var/lib/jenkins/.acmagent