Learn Kubernetes Weekly issue 62

Resource limits: predictability vs. efficiency, 3 common mistakes with promql, different kinds of managed Kubernetes, Helm's atomic

17 Jan 2024

Articles

1. The case for Kubernetes resource limits: predictability vs. efficiency

   Milan Plžík

   This article explores Kubernetes resource limits, detailing strategies for balancing efficiency with predictability and how limits affect performance, planning, and Quality of Service (QoS) classes.

2. 3 common mistakes with promql and Kubernetes metrics

   Luvpreet Singh

   In this article, you'll learn how to avoid three common mistakes with PromQL and Kubernetes metrics:

   1. Duplicate series.
   2. Grouping/sum mistakes.
   3. Unexpected Cardinality.

3. Different kinds of managed Kubernetes

   Artem Lajko

   In this article, you'll compare different kinds of managed Kubernetes:

   1. AKS
   2. Cluster-API
   3. vSphere with Tanzu
   4. Kubernetes based on SIG Cluster-API
   5. CAPZ
   6. Giant Swarm
   7. Kamaji
   8. Kubermatic

4. Helm's  —  atomic option for rollback leaves you in the dark

   Akash Jaiswal

   This article teaches how to use the --atomic, --wait, and --timeout flags in Helm within CI/CD pipelines.

   It highlights the importance of tracking Helm's exit status to detect deployment failures and managing rollbacks.

5. Kubernetes: ensuring high availability for pods

   Arseny Zinchenko

   In this article, you'll learn how to maintain uninterrupted pod operation while utilizing Karpenter for node scaling.

   It covers high-availability strategies like replicas, spread constraints, PodDisruptionBudgets, and do-not-disrupt annotations.

6. Kubernetes hands-on labs and tutorials

   A Curated List of Kubernetes Labs and Tutorials:

   • A $0 learning platform for all levels - from the ground up.
   • Over 500+ highly interactive Docker tutorials and guides.
   • Well tested on Kubernetes Cluster and can be run on a browser.

Articles worth checking out:

• A different method to debug Kubernetes pods

• Saving millions of dollars by bin-packing clickhouse pods in AWS EKS

• We reported a security issue in AWS CDK's eks.Cluster component

• The essentials for building a devsecops platform on Kubernetes

• Using Zarf to deploy a podInfo-flux application in a Kubernetes cluster

• Ordering containers within pod

• The good, the bad and the ugly of templating yaml in Kubernetes

• Kubernetes tips & tricks: useful kubectl commands

• Kubernetes NGINX ingress controller: 10+ complementary configurations for web applications

Tutorials

1. Kubernetes custom controllers recipes for beginners

   Akriotis Kyriakos

   This article teaches the intricacies of developing custom controllers in Kubernetes, including tips on handling DeletionTimestamp, predicates for event filtering, setting owner references for resource management, and more.

2. Run asynchronous tasks in a new Kubernetes pod with Nodejs

   Alexandre Olive

   This tutorial teaches how to asynchronously handle resource-intensive tasks in Kubernetes pods with NodeJS.

   It demonstrates implementing a NodeJS API using ExpressJS and the @kubernetes/client-node library to manage pod operations.

Kubernetes jobs

1. • Site Reliability Engineer with Braintrust

   • Salary: $800 a day

   • Location: remote from the United States

   • Tech stack: Kubernetes, AWS, GCP, Docker, Go, Python, Java, Scala, Elastic Search, Grafana

2. • Software Engineer with Torc Robotics

   • Salary: $139K to $166.8K a year

   • Location: remote from the United States

   • Tech stack: Kubernetes, AWS, Azure, GCP, Docker, Shell, Python, C++, Groovy, Terraform

3. • Site Reliability Engineer with Grafana Labs

   • Salary: $155K to $201K a year

   • Location: remote from the United States

   • Tech stack: Kubernetes, AWS, Helm, Docker, Go, Shell, Python, Terraform, Grafana Mimir, Grafana

Discover more Kubernetes jobs on Kube Careers →

Code & tools

1. k8spacket

   k8spacket helps to understand TCP packets traffic in your kubernetes cluster:

   • Shows traffic between workloads in the cluster.
   • Informs where the traffic is routed outside the cluster.
   • Displays information about closing sockets by connections.

2. Kubernetes Security Profiles Operator

   The Kubernetes Security Profiles Operator aims to make it easier for users to use SELinux, seccomp and AppArmor in Kubernetes clusters.

3. smallab-k8s-pve-guide

   This guide series explains how to set up a personal small home lab running a Kubernetes cluster with VMs on a Proxmox VE standalone server node.

4. SnapScheduler: scheduled snapshots

   SnapScheduler provides scheduled snapshots for Kubernetes CSI-based volumes.

5. NVIDIA device plugin for Kubernetes

   The NVIDIA device plugin for Kubernetes is a Daemonset that allows you to automatically:

   • Expose the number of GPUs on each node of your cluster.
   • Keep track of the health of your GPUs.
   • Run GPU-enabled containers in your Kubernetes cluster.

Other interesting projects:

• kube-no-trouble: check deprecated API

• kluctl: the missing Glue

• Kubernetes easy engine

Upcoming Kubernetes events

1. Jan

   18

   Can Backstage solve all problems? How to supercharge your Kubernetes platform!

   In-person meetup organized by Cloud Native Aalborg.

   • Location: Aalborg, DK

   • This is a free event.

2. Jan

   18

   Availability with GKE stateful ha controller, intelligent data infrastructure & sharding Postgres on Kubernetes

   Online meetup organized by Data on Kubernetes Community.

   • This is a virtual event

   • This is a free event.

3. Jan

   19

   Voxxed Days Ticino

   In-person conference organized by VDT.

   • Location: Lugano, CH

   • This event requires an entrance fee

4. Jan

   22

   Voxxed Days Cern

   In-person conference organized by VDC.

   • Location: Geneva, CH

   • This event requires an entrance fee

5. Jan

   24

   Kubernetes Community Days Oslo 2024

   In-person conference organized by KCD Norway.

   • Location: Olso, NO

   • This event requires an entrance fee

6. Jan

   25

   Advanced Kubernetes course

   Online workshop organized by Learnk8s.

   • This is a virtual event

   • This event requires an entrance fee

7. May

   8

   J On The Beach 24

   In-person conference organized by JOT.

   • Location: Malaga, ES

   • This event requires an entrance fee

   • • Use JkUb3r10 to get 10% discount off Standard Tuna fee

Discover more Kubernetes events on Kube Events →

Kubernetes Call for Papers

1. expired

   Kubernetes Community Days Costa Rica 2024

   The Call For Paper was open until 1 February 2024 at UTC. More info →

   • Location: Heredia, CR

   • In-person conference organized by KCD Costa Rica.

   • The conference starts on the 1 March 2024.

   • Apply here

2. expired

   Kubernetes Community Days Romania 2024

   The Call For Paper was open until 31 January 2024 at UTC. More info →

   • Location: Bucharest, RO

   • In-person conference organized by KCD Romania.

   • The conference starts on the 25 April 2024.

   • Apply here

3. expired

   Kubernetes Community Days Texas 2024

   The Call For Paper was open until 5 February 2024 at UTC. More info →

   • Location: Irving, TX, USA

   • In-person conference organized by KCD Texas.

   • The conference starts on the 12 April 2024.

   • Apply here

4. expired

   Kubernetes Community Days Istanbul

   The Call For Paper was open until 31 January 2024 at UTC. More info →

   • Location: Istanbul, TR

   • In-person conference organized by KCD Istanbul.

   • The conference starts on the 15 May 2024.

   • Apply here

5. expired

   Kubernetes Community Days Munich 2024

   The Call For Paper was open until 31 January 2024 at UTC. More info →

   • Location: Munich, DE

   • In-person conference organized by KCD Munich.

   • The conference starts on the 2 July 2024.

   • Apply here

6. expired

   KubeHuddle Toronto 2024

   The Call For Paper was open until 3 February 2024 at UTC. More info →

   • Location: Toronto, CA

   • In-person conference organized by KubeHuddle.

   • The conference starts on the 8 May 2024.

   • Apply here

7. expired

   Kubernetes Community Days New York 2024

   The Call For Paper was open until 12 February 2024 at UTC. More info →

   • Location: New York, NY, USA

   • In-person conference organized by KCD New York.

   • The conference starts on the 22 May 2024.

   • Apply here

8. expired

   DevOps Pro Europe

   The Call For Paper was open until 15 April 2024 at UTC. More info →

   • Location: Vilnius, LT and virtual

   • Online & in-person conference organized by Data Miner.

   • The conference starts on the 20 May 2024.

   • Apply here

9. expired

   Cloud Native 2024

   The Call For Paper was open until 19 February 2024 at UTC. More info →

   • This is a virtual event

   • Online conference organized by Conf42.

   • The conference starts on the 21 March 2024.

   • Apply here

Until next time!

— Dan

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