Story Tag: k8s

Stories Tag: k8s

Introduction to Kubernetes Deployment Strategies | by Knoldus Inc. | Jul, 2021 | Medium

admin 1 day ago in

Kubernetes provides Deployment resource which tells the Kubernetes the desired state for the application.Deployment are declarative, which means that they have what to achieve not how to achieve. To achieve this desired state, under the hood deployment uses ReplicaSets, which further maintains the required sets of the pods. Using deployment we can achieve the desired state of an application in K8s Cluster, but what if…

K8S – Creating a kube-scheduler plugin | by Julio Renner | Jul, 2021 | Medium

admin 2 days ago in

Saying it in a few words, the K8S scheduler is responsible for assigning Pods to Nodes. Once a new pod is created it gets in the scheduling queue. The attempt to schedule a pod is split in two phases: the Scheduling and the Binding cycle. In the Scheduling cycle the nodes are filtered, removing those that don’t meet the pod requirements. Next, the feasible nodes…

[บันทึกช่วยจำ] มาลอง Avi Kubernetes Operator (AKO) หรือ Ingress Controller จาก NSX ALB กันเถอะ | by Kritsadanshon Sadeewong | Jul, 2021...

admin 3 days ago in

หลังจากที่ได้ที่ได้เล่น vSphere with Tanzu เวอร์ชั่นล่าสุดบน vCenter และ vSphere 7.0 U2 แล้วที่รองรับ NSX ALB (Avi) แล้ว คราวนี้ก็มาถึงเรื่องหนึ่งนอกจากที่เราจะใช้ Service ที่เป็น LoadBalancer ยังมีอีก Service หนึ่งที่นิยมใช้งานกันนั้นก็คือ Service แบบ Ingress นั้นเอง ซึ่ง Service แบบ Ingress ก็มีมากมายให้เราเลือกใช้งานไม่ว่าจะเป็น NGINX Ingress Controller ที่ดูแลโดย Google, NGINX Ingress Controller for Kubernetes ที่ดูแลโดย NGINX Inc. เอง หรือจะเป็นอีกตัวที่นิยมกันที่ชื่อ Traefik Kubernetes Ingress แต่คราวนี้บน Tanzu เราใช้ Avi มาจัดการในเรื่อง LoadBalancer แล้วก็มาลองใช้งานฟังก์ Ingress Controller จากทาง Avi ดูกันดีกว่าจะเป็นอย่างไรบ้าง โดยฟังก์ชั่นนี้จะมีชื่อว่า Avi Kubernetes Operator…

Kubernetes Installation Methods The Complete Guide | by Saeid Bostandoust | Jul, 2021 | Medium

admin 4 days ago in

If you are familiar with Kubernetes, you must know Kubernetes installation is one of the challenging topics of Kubernetes. This challenge occurs because a multitude of installation methods exists. In this article, I’ll talk about Kubernetes installation methods, available choices, and best practices. Let’s get started. Because a great many installation methods exist, I divide these methods into five major types. This division has been…

Intro to K8s Monitoring — Part1. K8s consists of multiple components on… | by Sandeep Baldawa | Jul, 2021 |...

admin 2 weeks ago in

K8s consists of multiple components on both the Controller and Worker Nodes. Imagine you as a K8s administrator who has built a cluster, and you get a confirmation from users that they could deploy and test applications through this cluster successfully. However, there is no guarantee that the cluster will run as a healthy cluster all the time without running into any issues. Things might…

Gemini GPU 分割資源調度器（Token-based Scheduler） | by Patrick Fu | Gemini Open Cloud 雙子星雲端 | Jul, 2021 | Medium

admin 2 weeks ago in

上回跟大家介紹了 Gemini GPU分割解決方案。有些讀者來詢問，Gemini GPU Partitioning 和別家的解決方案，有何不同之處？ 其實有關在 Kubernetes 上實現 GPU Sharing 這個議題，產學界己經有很多不同的解決方案。例如 Reference #6 Volta MPS 就是一個NVIDIA提供的GPU分割方案，Reference #7 是阿里雲的GPU 分享功能。此外，像 Georgia Tech（Reference #8） 跟 N. Carolina（Reference #9） 也有他們的研究計劃。這些解決方案有些利用硬體，也有些是利用Kubernetes Scheduler來做時間分割(time slicing)的。 Gemini 除了是一個沒有任何 GPU hardware dependency 的軟體解決方案外，比較特別的地方就是我們的 scheduler 有跟前台結合，去減低overhead，並及最佳化 GPU 的使用率。 Gemini在Kubernetes上定義了一個POD Kind，叫 SharePod。SharePOD的前台跑在每個Kubernetes worker node 上，去收集所有虛擬GPU使用狀況，那Gemini後台的SharePod Scheduler又是怎樣利用這些資訊，去公平地派送使用虛擬GPU的POD呢？ 接著，我們來解釋一下，我們SharePod Scheduler的設計理念。 一個理想的虛擬GPU分享調度器，應該要滿足下列四點需求： Gemini GPU Partitioning 實踐了以下功能來滿足上面四點需求 （參考圖一)： Gemini GPU Partitioning 在前台設計了一個GPU Kernel 同步事件的監控器， 來收集虛擬GPU資源使用數據，傳到後台，提供給scheduler 計算下一個應該被派送的sharePod。這個「監控器」其實是 CPU API…

UPDATED Q3 2021: Passing CKAD with flying colours | by Damian Fiłonowicz | Jul, 2021 | Datumo

admin 2 weeks ago in

I have recently passed the Certified Kubernetes Application Developer (CKAD) exam with a score of 91%. In this blog post, I will walk you through the most important things you need to know to nail it. CKAD is the Certified Kubernetes Application Developer certification which mostly focuses on the development part of Kubernetes applications. It’s part of a program developed by the Cloud Native Computing…

Lessons Learned After Using Kubernetes in Production for Over a Year | by arc10 | Jul, 2021 | Medium

admin 2 weeks ago in

Due to their small size, portability and speed, containers are slowly becoming the standard format for deploying applications. Essentially, containers are executable units of software that contain the application code along with its dependencies and configurations. Well, containers are not all sunshine and rainbows. Clustering, networking, and deployment automation of containers aren’t that easy. For these, you need orchestration tools like Kubernetes (commonly known as…

[Kubernetes] Intro. 컨테이너와 쿠버네티스. 컨테이너와 쿠버네티스를 가볍게 이해해 봅니다. | by bae.200.ok | Jul, 2021 | Medium

admin 2 weeks ago in

안녕하세요. 배민혁 입니다. 데이터 엔지니어링 관련된 자료들을 찾아보면 쿠버네티스를 통해 컨테이너를 실행하고, 컨테이너 내부에서 서비스를 실행하는 것을 많이 볼 수 있었습니다. 또한 주변에서 많이 듣긴 했지만 잘 알지 못하니 설명을 하거나 대화에 끼어들 수 없었습니다. 이번에 쿠버네티스를 알아가는 시간을 가지려고 합니다. 쿠버네티스 설명에 앞서 가벼운 배경을 이야기하려고 합니다. 일단 쿠버네티스는 컨테이너를 묶어서 pod라는 최소 배포 단위로 서비스가 실행됩니다. 이처럼 컨테이너가 기본이 됩니다. 컨테이너를 통해서 환경…