Use AWS SES to validate ACM certificate request


In case you are not familiar with AWS abbreviation, SES stands for Simple Email Service, ACM is short for AWS Certificate Manager. These two are independent services, each can work without the other. But in some scenarios, you may need to make them work together to solve your problem. For example: The domain does not … Continue reading Use AWS SES to validate ACM certificate request

Code smartly to avoid exceed AWS request rate


Have your http calls ever been throttled by AWS? If not, congratulations! And if you are curious about what it looks like, here you go: Below is what AWS says about the EC2 request rate limits. The same principal applies to other AWS services, e.g Autoscaling group, in which I encountered the rate exceeded problem. … Continue reading Code smartly to avoid exceed AWS request rate

Run autoscaling group on spot instance in a smart way


Spot fleet is good, but it may not fit every use case. E.g you can not easily shutdown the non-prod environment with spot fleet, due to its scalable target only allows 1 - 3000. In some scenarios, running autoscaling group on spot instance is a better way to go. And essentially, it is all about the … Continue reading Run autoscaling group on spot instance in a smart way

Run Elasticsearch Cluster on Spot Instances


Running Elasticsearch cluster is not cheap, as it generally requires a couple of high spec servers to provides both performances and reliabilities. Below is a typical 3 nodes Elasticsearch cluster that is running on AWS: 3 nodes, one in each availability zone. each node is both master and data node, and it is formed by ec2 … Continue reading Run Elasticsearch Cluster on Spot Instances