Category: IT Security

Hello everyone! I’m steadily walking towards becoming a ‘Golden Kuberstronaut’. In my last post, I mentioned that I learned ‘humility’ after experiencing the bitter taste of OTCA. This time, armed with that humility, I challenged the 8th hurdle: the ISTIO (ICA) certification! This success story will probably be the most unforgettable and spectacular day of…

Hello everyone! I’m running non-stop towards becoming a ‘Golden Kuberstronaut’. It feels like just yesterday I was boasting about opening my eyes to monitoring after passing the PCA, but this time, I’m here with news of passing the seventh hurdle: OTCA (OpenTelemetry Certified Associate)! 🥳 However, this success story will have a quite different tone…

Hello everyone! This is gasbugs, taking one step at a time towards the grand goal of becoming a ‘Golden Kubestronaut’. Not long after achieving the first milestone of ‘Kubestronaut’ by passing CKS, I immediately challenged the sixth hurdle, the PCA (Prometheus Certified Associate) exam, and I’m thrilled to share the news of my success! 🥳…

Hello everyone! This is gasbugs, continuously striving towards becoming a ‘Golden Kubestronaut’. Finally, I have obtained the CKS (Certified Kubernetes Security Specialist) certification, which is the fifth gateway and one of the most important milestones on this journey! 🥳 With this CKS pass, I have officially achieved the ‘Kubestronaut’ qualification recognized by CNCF. It’s a…

Hello! This is gasbugs, back with the fourth step on the journey to the ‘Golden Kuberstronaut’, a review of obtaining the KCSA (Kubernetes and Cloud Native Security Associate) certification. 🥳 Riding the momentum of passing KCNA in one day, I achieved the feat of passing this KCSA with a high score of 91 points by…

Hello everyone! Following my CKA certification renewal review, I’m sharing my experience of obtaining the KCNA (Kubernetes and Cloud Native Associate) certification, the third leg of my journey towards becoming a ‘Golden Kuberstronaut’. If CKA and CKAD allowed me to experience the depth of Kubernetes, this KCNA was a valuable opportunity to broadly understand the…

Hello everyone! Following my previous CKAD renewal review, I’m back with the second part of my journey towards becoming a ‘Golden Kuberstronaut’: my CKA (Certified Kubernetes Administrator) certification renewal review. This CKA exam, in particular, has many changes applied from February 2025, so I have a lot of content I definitely want to share with…

Hello, everyone who loves cloud-native technology! I’m thrilled to share the exciting news that I’ve successfully renewed my CKAD (Certified Kubernetes Application Developer) certification, following my CKA (Certified Kubernetes Administrator). 🎉 To be honest, I didn’t place much importance on regularly renewing certifications. However, a very special and ambitious goal has emerged: ‘Golden KubeStronaut’! ✨…

Imagine a situation where you need to deploy a new v2 version with added features to users. 🧐 What if you send all traffic to v2 at once? A terrible situation could arise where all users are affected if an unexpected bug occurs. 😱 To solve this problem, we use strategies like Canary Deployment and…

When operating services in a Kubernetes environment, you often encounter mysterious situations like, “The configuration is definitely correct, but why isn’t communication working from this pod to that pod? 🤔” Even after digging through logs or running `describe` commands, the cause often isn’t clear. The detective who solves these frustrating network issues is none other…