Describe your experience in implementing an automatic certificate monitoring and updating system in role infrastructure.

The experience of implementing an automatic certificate monitoring and renewal system includes several key stages:

1. Certificate expiration monitoring — writing scripts or using tools that regularly check the expiration date of certificates in the role infrastructure.

2. Automatic renewal — integration with a certificate issuance system (e.g., ACME protocol with Let's Encrypt or an internal CA) to automatically request and obtain new certificates.

3. Deployment of new certificates — automatically distributing the renewed certificates to the necessary services and restarting or reloading components to apply the new certificates.

4. Notifications and logging — setting up alerts for renewal errors or approaching expiration dates, as well as maintaining logs for auditing.

As an example, a combination of cron jobs for monitoring, Bash or Python scripts for renewal, and Ansible or Kubernetes for deploying certificates can be used.