I created my personal portfolio site with Jekyll. The site is simply chucked in the Github page. Now, it is time to use Github actions to deploy the site to the Github page repo every time I commit to master. Here is the code. I am not using the Jekyll …

When we have a web analytics application that collects front end event data such as Tealium, Adobe Analytics and so on, we can dispatch an custom event whenever user does action on the page. For example, we can dispatch a custom event to indicate the user clicked certain button on …

To schedule a lambda function to run at a regular interval, we can use CloudWatch Events. The problem is that the shortest interval is 60 seconds with CloudWatch Event scheduled job. What if we want to run a function under 60 seconds interval? Using a sleep function to loop the …

I made a JavaScript workout with a md file in my GitHub repo. Check out the work out here. The idea of this is to list a short JavaScript programming questions that you would encounter every day as a JavaScript developer. If you know how to do these, you don’t …

When I was running AWS CDK, I got this error and couldn’t really find the answer when I googled it. This error might happen for different reasons, but I worked out what was wrong with my CDK code after a few hours of googling and trying out different things. I’m …

In terms of computing, the lambda has only one parameter to tune, memory allocation. We can allocate any amount of memory between 128MB and 3008MB to your function today. The amount of memory you allocate is proportional to the amount of CPC allocated for the function. The lambda pricing is …

There is something really delightful about using actual programming language to code infrastructure. AWS CDK allows us to write infrastructure code in a totally different way from writing YAML or JSON type of code like CloudFormation or Terraform. The infrastructure code feels more familiar and it is more fun if …

There are a few AWS devops services, CodeDeploy, CodeBuild and CodePipeline. They have similar name and it’s confusing at first. CodeBuild is the service to create an artefact. In CodeBuild, we can install dependencies, run unit tests, create an artefact and push to the artefact repository. CodeDeploy uses the artefact …

The easiest way to deploy containerised applications to AWS is to use Elastic Beanstalk. Instead of creating and managing individual resources (such as EC2, security groups, load balancer, RDS and so on) to run applications, it creates and manage them as environments. If you want to deploy containers to AWS …

Having DynamoDB running locally is handy for local development. There are two ways to run DynamoDB locally, (1) using a jar file or (2) using a docker image. Generally speaking, running container is better than running a jar file in your local computer because it gives you more flexibility and …