How to Choose a Primary Key: Auto Increment vs UUID vs Natural Keys
Should a database primary key use auto increment, UUID, or a natural key? This article compares the trade-offs from performance, security, and scalability perspectives.
Cloud Magician
AWS EKS IRSA Tutorial: How Pods Assume IAM Roles via Service Accounts
Learn how to configure IRSA in AWS EKS so Pods can assume IAM Roles through Kubernetes Service Accounts and securely access S3 and Secrets Manager without long-lived AWS credentials.
Java Date and Time Guide: Date, Calendar, and java.time Explained
A practical guide to handling date and time in Java, from the legacy Date, Calendar, and SimpleDateFormat APIs to Java 8 java.time, Instant, LocalDate, and ZonedDateTime.
AWS Trivia: Why Do IAM Policies Almost Always Use Version 2012-10-17?
Why do AWS IAM policies almost always use Version 2012-10-17? This post explains what that version actually means, how it differs from service API versions, and what happens if you leave it out.
AWS EKS RBAC Guide: Add a Namespace Admin User
Learn how to add an admin user for a specific namespace in AWS EKS, including IAM Policy, EKS Access Entry, Role, RoleBinding, ClusterRole, and ClusterRoleBinding setup.
Kubernetes View Multiple Pod Logs
Kubernetes Pod Logs Guide: Quickly View Logs from Multiple Pods with kubectl. Practical steps, common pitfalls, and commands you can apply quickly.
Container In Ec2 Do Not Have Permission Via Iam Profile
Containers in EC2 Cannot Obtain Expected Permissions via IAM Instance Profile Role. Practical steps, common pitfalls, and commands you can apply quickly.
How To Prevent Cronjob Failed Impact Autoscaling Failed
How to prevent cronjob execution failure on EKS from causing Worker Node auto-extension failure. Practical steps, common pitfalls, and commands you can apply quickly.
使用 User Data 為 Linux EC2 建立初始資料
使用 User Data 為 Linux EC2 建立初始資料. Practical notes and implementation steps.
Grafana GPG Key 過期
Grafana GPG Key 過期. Practical notes and implementation steps.