Learn Kubernetes Weekly issue 127
Database read replicas, Between Flannel and Calico, NGINX Upstreams, What is ProviderID, Cluster API, and Cloud Controller Manager?
16 Apr 2025
This issue is sponsored by KubeFM — the new Kubernetes podcast episodes are starting next week. Don't miss them!
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Level up your Kubernetes game!
Articles
Using database read replicas in distributed systems
Evgeny Kharitonov
Database Read Replicas in distributed systems can be a challenge. Learn how Tailor Brands solved the Replication Lag problem and improved application performance without sacrificing data consistency.
Kubernetes Cluster Networking: Differences Between Flannel and Calico
Rifewang
This article compares Flannel and Calico:
- Flannel uses lightweight host-gw/VXLAN for small clusters.
- Calico offers BGP, network policies, and Typha for scalability in large deployments.
Amila De Silva
Learn how Amila tuned the NGINX Ingress Controller, solved TIME-WAIT bottlenecks, and improved performance in high-traffic scenarios.
What is ProviderID in Kubernetes, Cluster API, and Cloud Controller Manager?
Alexandr Nevskiy (kepkin)
Learn how ProviderID links Kubernetes nodes to infrastructure (cloud VMs/bare metal) via an ID used by Cloud Controller Manager (CCM) and Cluster API (CAPI).
Improving Kubernetes-Mixin API Server Rules Consistency
Lorenzo Felletti
Kubernetes-Mixin API Server Rules Consistency issue: 30-day metrics exceed 100% in large clusters.
The problem lies in Prometheus' recording rules, which are not executed on the same data as metrics, leading to inconsistent counts and calculations.
Mastering Service Mesh with Linkerd
Ivan Porta
In this article, you will learn how Linkerd offers a lightweight, secure solution that automates networking, enhances observability, and simplifies communication across distributed systems.
Articles worth checking out:
[PDF] Kubernetes Stories from the Trenches
Raw, unfiltered stories from engineers who've lived through cluster outages, bare-metal nightmares, and 3 a.m. incident calls—and somehow came out smarter on the other side.
![[PDF] Kubernetes Stories from the Trenches](https://assets.learnk8s.io/kubefm-ad-1.v1.png)
Tutorials
Blue-Green deployments: a guide to deploying one or more applications
Flant staff
The article guides readers through implementing blue-green deployments for one or more applications using GitLab CI and Werf.
It covers deploying applications, managing versions, and using Werf bundles for multiple apps.
How to Securely Share & Access Local Kubernetes Services with Tailscale
Jason Yee
This tutorial shows how to deploy & use the Tailscale Kubernetes operator to share private Kubernetes apps securely.
Kubernetes jobs
Software Engineer with Cast AI
Salary: $78K to $108K a year
Location: remote from Europe
Tech stack: Kubernetes, AWS, Azure, GCP, ArgoCD, Go, Python, Javascript, PostgreSQL, Gitlab
Product Owner with Cast AI
Salary: €78K to €99.6K a year
Location: remote from Europe
Tech stack: Kubernetes, AWS, Azure, GCP
🔥 Software Engineer with Cast AI
Salary: €78K to €108K a year
Location: remote from Poland, Romania, Czechia, Slovakia, Lithuania
Tech stack: Kubernetes, AWS, Azure, GCP, Helm, ArgoCD, Go, PostgreSQL, Terraform, Gitlab
🔥 Solution Engineer with Cast AI
Salary: $150K to $300K a year
Location: remote from India
Tech stack: Kubernetes, AWS, Azure, GCP, Go, Shell, Python, Powershell
DevSecOps Engineer with Bae Systems
Salary: £54.79K a year
Location: based in the office (and remote from home) in Warton, UK
Tech stack: Kubernetes, Azure, Azure DevOps, Jenkins, Gitlab
Discover more Kubernetes jobs on Kube Careers →
Code & tools
Cloudflare Operator is a Kubernetes operator that creates and manages Cloudflare Tunnels and DNS records for (HTTP/TCP/UDP*) service resources.
ahmetb
kubectl-cond is a tool that provides a human-readable format for printing Kubernetes object resource conditions.
Bottlerocket is a free and open-source Linux-based operating system meant for hosting containers.
It is specifically designed to work with your container orchestrator (like Kubernetes) to automate the containers' lifecycle in your cluster.
cilium
pwru is an eBPF-based tool for tracing network packets in the Linux kernel with advanced filtering capabilities.
It allows fine-grained introspection of kernel state to facilitate debugging network connectivity issues.
Kamaji is a tool aimed to build and operate a Managed Kubernetes Service with a fraction of the operational burden.
With Kamaji, you can deploy and operate hundreds of Kubernetes clusters as a hyper-scale cloud provider.
Other interesting projects:
Upcoming Kubernetes events
Apr
16
Kubernetes networking unplugged: making the complex simple
In-person meetup organized by Cloud Native Kuala Lumpur.
Location: Kuala Lumpur, MY
This is a free event.
Apr
16
In-person conference organized by Devopsdays.
Location: Raleigh, NC, USA
This event requires an entrance fee
Apr
16
Building self hosted AI applications on Kubernetes with KAITO
Online meetup organized by Welsh Azure User Group.
This is a virtual event
This is a free event.
Apr
18
In-person social event organized by AWS Korea.
Location: Seoul, KR
This is a free event.
Apr
24
Kubernetes Community Days Budapest 2025
In-person conference organized by KCD Budapest.
Location: Budapest, HU
This event requires an entrance fee
Apr
28
Advanced Kubernetes course (Singapore)
In-person workshop organized by Learnk8s.
Location: Singapore, SG
This event requires an entrance fee
Discover more Kubernetes events on Kube Events →
Kubernetes Call for Papers
expired
Kubernetes Community Days Taipei 2025
The Call For Paper was open until 20 April 2025 at UTC. More info →
Location: Taipei, TW
In-person conference organized by KCD Taiwan.
The conference starts on the 5 July 2025.
- Apply here
expired
Kubernetes Community Days Sofia 2025
The Call For Paper was open until 21 April 2025 at UTC. More info →
Location: Sofia, BG
In-person conference organized by KCD Sofia.
The conference starts on the 18 September 2025.
- Apply here
35
days
The Call For Paper is open until 31 May 2025 at UTC. More info →
Location: Vienna, AT
In-person conference organized by CNDA Austria.
The conference starts on the 8 October 2025.
- Apply here
9
days
Kubernetes Community Days Colombia 2025
The Call For Paper is open until 5 May 2025 at UTC. More info →
Location: Medellín, CO
In-person conference organized by KCD Colombia.
The conference starts on the 29 August 2025.
- Apply here
16
days
Kubernetes Community Days Lima, Perú 2025
The Call For Paper is open until 12 May 2025 at UTC. More info →
Location: Lima, PE
In-person conference organized by KCD Lima, Perú.
The conference starts on the 19 July 2025.
- Apply here
32
days
KubeCon + CloudNativeCon North America 2025
The Call For Paper is open until 28 May 2025 at UTC. More info →
Location: Atlanta, GE, USA
In-person conference organized by Linux Foundation.
The conference starts on the 10 November 2025.
- Apply here
4
days
The Call For Paper is open until 30 April 2025 at UTC. More info →
Location: Vilnius, LT and virtual
Online & in-person conference organized by Data Miner.
The conference starts on the 20 May 2025.
- Apply here
51
days
The Call For Paper is open until 15 June 2025 at UTC. More info →
Location: Tel Aviv, IL
In-person conference organized by Devopsdays.
The conference starts on the 11 December 2025.
- Apply here
15
days
The Call For Paper is open until 10 May 2025 at UTC. More info →
Location: Eindhoven, NL
In-person conference organized by Devopsdays.
The conference starts on the 2 October 2025.
- Apply here
Until next time!
— Dan
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