Hacking Kubernetes
Read it now on the O’Reilly learning platform with a 10-day free trial. O’Reilly members get unlimited access to books, live events, courses curated by job role, and more from O’Reilly and nearly 200 top publishers. Want to run your Kubernetes workloads safely and securely? This practical book provides a threat-based guide to Kubernetes security. Each chapter examines a particular component's arch
Donating Docker Distribution to the CNCF | Docker
We are happy to announce that Docker has contributed Docker Distribution to the Cloud Native Computing Foundation (CNCF). Docker is committed to the Open Source community and open standards for many of our projects, and this move will ensure Docker Distribution has a broad group maintaining what is the foundation for many registries. What is Docker Distribution? Distribution is the open source cod
🧪 Open Sourcing the Docker Hub CLI Tool | Docker
At Docker, we are committed to making developer’s lives easier, and maintaining and extending our commitment to the Open Source community and open standards for many of our projects. We believe building new capabilities into the Docker Platform in partnership with our developer community and in full transparency leads to much better software. Last December, we announced the release of a new experi
TechnoSophos: Writing a Kubernetes CRD Controller in Rust
In this post, we'll define a Kubernetes Custom Resource Definition (CRD) and then write a controller (or operator) to manage it -- all in 60 lines of Rust code. Over the last several months, I have been writing more and more Kubernetes-specific code in Rust. Even though Kubernetes itself was written in Go, I am finding that I can typically write more concise, readable, and stable Kubernetes code i
Kubernetes 1.20: SIG-Network の変更内容 - Qiita
Kubernetes 1.20 の SIG-Network の変更内容をまとめました。 What's New (新情報) IPv4/IPv6 run IPv4/IPv6 のデュアルスタックは、Service のデュアルスタックをサポートするため、利用者とコミュニティのフィードバックを元に再実装されました。クラスタでデュアルスタックが有効な場合、IPv4, IPv6 または両方の Service を作成することができます。既存の Service でもこの設定は変更可能です。詳細は更新された IPv4/IPv6 デュアルスタックのドキュメント をご覧ください。 Pod のホスト名を FQDN とする機能がベータに 1.19 でフィーチャーゲート SetHostnameAsFQDN で導入された機能がデフォルトで有効になりました。詳しくは、Service と Pod に対しての DNS のドキュ
Service Discovery in Kubernetes: Combining the Best of Two Worlds
Traefik: canary deployments with weighted load balancingDon't miss new posts in the series! Subscribe to the blog updates and get deep technical write-ups on Cloud Native topics direct into your inbox. Before jumping to any Kubernetes specifics, let's talk about the service discovery problem in general. What is Service Discovery In the world of web service development, it's a common practice to ru
Docker Desktop 3.0.0: Smaller, Faster Releases | Docker
Today with the release of Docker Desktop 3.0.0, we’re launching several major improvements to the way we distribute Docker Desktop. From now on we will be providing all updates as deltas from the previous version, which will reduce the size of a typical update from hundreds of MB to tens of MB. We will also download the update in the background so that all you need to do to benefit from it is to r
What developers need to know about Docker, Docker Engine, and Kubernetes v1.20 | Docker
What developers need to know about Docker, Docker Engine, and Kubernetes v1.20 The latest version of Kubernetes Kubernetes v1.20.0-rc.0 is now available. The Kubernetes project plans to deprecate Docker Engine support in the kubelet and support for dockershim will be removed in a future release, probably late next year. The net/net is support for your container images built with Docker tools is no
Don't Panic: Kubernetes and Docker
By Jorge Castro, Duffie Cooley, Kat Cosgrove, Justin Garrison, Noah Kantrowitz, Bob Killen, Rey Lejano, Dan “POP” Papandrea, Jeffrey Sica, Davanum “Dims” Srinivas | Wednesday, December 02, 2020 Update: Kubernetes support for Docker via dockershim is now removed. For more information, read the removal FAQ. You can also discuss the deprecation via a dedicated GitHub issue. Kubernetes is deprecating
Kubernetes 1.20からDockerが非推奨になる理由 - inductor's blog
追記: Kubernetes側での公式のアナウンスが2本出ているのでこちらも合わせてご覧ください。 kubernetes.io kubernetes.io Kubernetesコミュニティを眺めていたら、やたらめったら色んな人達が1.20 RCのリリースノート引っ張り出して「Dockerが非推奨になるからちゃんと対策を検討してね！！！」とアナウンスをしていて、挙げ句SIG Contributexではその対策に追われてバタバタしている自体を観測しました。 CNCF Ambassador Slackでもだいぶ燃え上がっていて、見かねて dev.to に記事を投稿したのでそれをかんたんに日本語にまとめてみようと思います。英語のほうはこちらをご覧ください。 dev.to 追記2. 影響範囲を知りたい場合はまずこちらをお読みください blog.inductor.me 追記2. 影響範囲を知りたい場合
k8ssandraを試す
こちらの記事に取り上げられたK8ssandraをローカルのDockerを使って動かしてみます。 K8ssandra = Cassandra on Kubernetes (k8s) Apache Cassandraはオープンソースで開発されている分散データベースです。 現在の安定版はv3.11.7、次のメジャーバージョンである4.0のリリースに向けて開発が進められています。 分散データベースということは、複数台のノードが協調して動きます。 通常は、手順書に沿って1台1台インストール・設定を行ったり、Ansibleなどでそれらの手順をある程度自動化したりしてデータベースを構築します。また、データベースだけでなく、監視や運用の仕組みを別途組み込む必要があることも多々あります。 それがKubernetes基盤上に展開できれば、データベース単体だけでなく、運用や監視に必要な機能も、Kubernete
What’s new in Kubernetes 1.20?
Kubernetes 1.20 is about to be released, and it comes packed with novelties! Where do we begin? As we highlighted in the last release, enhancements now have to move forward to stability or being deprecated. As a result, alpha features that have been around since the early times of Kubernetes, like CronJobs and Kubelet CRI support, are now getting the attention they deserve. Another noteworthy fact
Guide to OOMKill Alerting in Kubernetes Clusters
Dragan Milic Monday 23 Nov 2020 Intro RAM is most likely the scarcest resource that is first exhausted on your servers. If you’re serious about running software under Linux/Unix, you’re certainly aware of what an OOMKill is. Short refresher: when a program requests a new memory page from the kernel two things can happen. There is a free memory page: The kernel page assigns the page to the process
Kubectl: Developer tips for the Kubernetes command line | Red Hat Developer
Kubectl, the Kubernetes command-line interface (CLI), has more capabilities than many developers realize. For example, did you know that kubectl can reach the Kubernetes API while running inside a cluster? You can also use kubectl to assume different user identities, to select a custom editor to run with the kubectl edit command, and more. In this article, I introduce several kubectl CLI features
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Release NPD v0.8.5 release · kubernetes/node-problem-detector
Add cronjob controller v2 by alaypatel07 · Pull Request #93370 · kubernetes/kubernetes