There are two types of AWS Lambda networking settings: No VPC and VPC-based. The major difference is that VPC-based Lambda allows you to access the resources in your VPC, e.g your EC2 resources sitting in the private subnets. No VPC lambda only can access Internet by default. Before you choose to use VPC-based lambda, there … Continue reading Things you need to know about AWS VPC based Lambda
Domain Validation (DV): This is a lower level of validation. The CA validates that you have control of the domain. A DV certificate expires in 90 days. Organization Validation (OV): A higher level of validation. The CA validates whether or not the company is valid, if it is registered, and if the business contact legitimately … Continue reading Three types of CA Validation Certificate
Crowd is Atlassian centralized identity management tool. Since Crowd 2.7, the Active Directory Connector is able to sync the disabled flag from Active Directory to Crowd. But if you are using older version or other connectors (e.g Delegated Authentication Directory), then you may run into the issue that users are disabled in Active Directory are … Continue reading CrowdLess – Make Crowd less crowded
I summarised a list of FAQ about the memory request and limit in Kubernetes. Also I have a real example down the bottom. 1) What if Container exceed memory request? Totally fine, a Container can exceed its memory request if the Node has memory available. 2) What if Container exceed memory limit? Thats dangerous, as … Continue reading The myth of memory requests and limits in Kubernetes
Caching is 'fun' if you don't set it up correctly. A useful cheat sheet of CloudFront edge cache TTL settings that I found in AWS documents site. Origin Configuration Minimum TTL = 0 Seconds Minimum TTL > 0 Seconds The origin adds a Cache-Control max-age directive to objects CloudFront caching CloudFront caches objects for the lesser of … Continue reading CloudFront Edge Cache Settings
Jackie Chen's IT Workshop 