We use EC2 Image Builder to build both Amazon Linux 2 and Red Hat Enterprise Linux based AMI as our SOE. The Ansible playbook that is included in the component installs SSM agent, but somehow we could not connect to the EC2 instance that is created from the RHEL AMI SOE via ssm session manager. … Continue reading Avoid EC2 Image Builder Remove SSM Agent
AWS Quiz App
As a learning practice, I created a small application that picks random questions from AWS Knowledge Centre. I have not polished the UI yet, so it looks a bit ugly 😉 But it does what I need - Test myself with a couple random AWS questions. Give it a go if you would like to … Continue reading AWS Quiz App
Two Examples of using AWS Network Firewall
AWS Network Firewall is a high-available and scalable firewall service that provides network protections for VPC, which is a supplement to the existing security services. Security group protects computing resources (EC2, Lambda, RDS...)NACL (Network Access Control List) protects subnetsWAF (Web Application Firewall) and Shield protects frontend resources (ELB, CloudFound, API Gateway) There are quite a … Continue reading Two Examples of using AWS Network Firewall
Yum gets ‘HTTPS Error 403 – Forbidden’ error in Amazon Linux 2
If you use S3 endpoint not NAT/Proxy to access the Amazon yum repository, then this post should be helpful to you. We use S3 endpoint to access Amazon repositories, and we noticed that any yum operations failed with the 'HTTPS Error 403 - Forbidden' error in the EC2 instances that are launched from the latest … Continue reading Yum gets ‘HTTPS Error 403 – Forbidden’ error in Amazon Linux 2
Create a Slack FAQ Bot in AWS Lambda
I recently wrote a simple Slack FAQ bot that can answer users' questions automatically. User is able to find the knowledge base articles and relevant shortcut in the ticketing system with just one click. This is how it looks like in Slack. And it is also super easy to customize the Bot to fit different … Continue reading Create a Slack FAQ Bot in AWS Lambda
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