Learn Kubernetes Weekly issue 161 · 10 Dec 2025
Kubernetes Informers Pitfalls, Graceful Shutdown, Namespaces and Multi-tenancy, Docker Swarm Migration, Centralizing Helm
This newsletter is brought to you by StormForge by CloudBolt — ML-powered Kubernetes rightsizing that keeps clusters fast, efficient, and under control
Articles
Kubernetes Informers are so easy... to misuse!
render.com
This article reveals hard-earned lessons on using Kubernetes Informers in large clusters, explaining informer fundamentals, handler design pitfalls, caching, memory optimization, and workqueue best practices for scalable controller code.
KubeCon 2025: Three Things This Year’s Conversations Told Me About Kubernetes Optimization
www.cloudbolt.io
KubeCon 2025 conversations revealed a shift: Kubernetes has the tools for continuous optimization, but cultural and organizational hurdles remain.
Here are three signals shaping what’s next.
sponsored
Importance of Graceful Shutdown in Kubernetes
dev.to
This article explains why default rolling updates in Kubernetes are insufficient for zero-downtime and demonstrates how missing graceful shutdown handling can result in dropped or failed requests during pod termination.
Breaking Boundaries: Kubernetes Namespaces and multi-tenancy
blog.amberwolf.com
This article explores why using Kubernetes namespaces alone is not a sufficient isolation or security boundary.
It shows common pitfalls and many attack paths that let a tenant escape isolation even if you only gave them access to a single namespace.
How our small company migrated from Docker Swarm to Kubernetes
medium.com
This case study explains how Coreteq moved from Docker Swarm to Kubernetes, replacing NFS with distributed storage, adopting Argo CD for GitOps and using Vault for secrets while redesigning networking for better reliability.
How We Leverage Kubernetes to Deploy Our Cloud Infrastructure
tech-blog.goflink.com
This article explains how Flink moved from a Terraform-centric setup to managing their Google Cloud resources via Kubernetes.
Articles worth checking out:
ML-driven rightsizing for Kubernetes workloads
Stop overprovisioning Kubernetes.
StormForge by CloudBolt uses ML to rightsize workloads automatically—no manual tuning or wasted spend.
Tutorials
Bill-Accurate Kubernetes Cost Allocation, Now Built Into CloudBolt
www.cloudbolt.io
See how CloudBolt brings bill-level accuracy to Kubernetes cost allocation by linking cloud invoices with container metrics, distributing shared costs intelligently, and integrating natively with chargeback systems.
sponsored
Building Distributed WebSockets in Kubernetes with Ktor & Postgres Notifications
edward-spencer.medium.com
This article shows how to use WebSockets in Kubernetes by combining Ktor with PostgreSQL’s LISTEN/NOTIFY to sync events across pods.
Kubernetes jobs
Platform Engineer with AMERICAN SYSTEMS
Salary: $155.7K to $260K a year
Location: remote from the United States of America
Tech stack: Kubernetes, Ansible, Shell, Python, Gitlab, Helm, Rancher
Systems Performance Engineer with Datadog
Salary: $187K to $240K a year
Location: based in the office (and remote from home) in Boston, MA / New York, NY, USA
Tech stack: Kubernetes, Datadog, containerd, AWS, Go, Javascript, Rust, C
Platform Engineer with Peraton
Salary: $112K to $179K a year
Location: based in the office in Washington, D.C, USA
Tech stack: Kubernetes, Grafana, AWS, Terraform, Shell, Python, Prometheus, Helm, ArgoCD
DevSecOps Engineer with Corelight
Salary: $221K to $268K a year
Location: remote from North America
Tech stack: Kubernetes, Go, Splunk
DevOps Engineer with Corelight
Salary: $158K to $198K a year
Location: remote from North America
Tech stack: Kubernetes, Grafana, AWS, Azure, GCP, Docker, Terraform, Pulumi, Ansible, Puppet
Discover more Kubernetes jobs on Kube Careers →
Code & tools
Kogaro – Kubernetes Configuration Hygiene Agent
github.com/topiaruss
Kogaro continuously validates Kubernetes config with 60+ checks across reference, resource, security, image, and network domains, catching silent failures before they impact production.
Kube-vip: virtual IP and load balancer
kube-vip.io
kube-vip provides Kubernetes clusters with a virtual IP and load balancer for both the control plane (for building a highly-available cluster) and Kubernetes Services of type LoadBalancer without relying on any external hardware or software.
Kubeterm: Kubernetes client tool
github.com/kbterm
This tool gives a desktop and mobile GUI for managing your Kubernetes clusters.
It lets you:
- import kubeconfigs,
- view resources/metrics,
- exec into pods,
- forward ports,
- and control Helm releases.
github.com/coroot
Coroot is an open-source eBPF-based observability tool that turns telemetry data into actionable insights, helping you quickly identify and resolve application issues.
KubeCodex: GitOps Repo Structure Template
github.com/TheCodingSheikh
KubeCodex is a standardized GitOps directory layout you plug into your repo so that ArgoCD can manage Kubernetes apps cleanly across multiple clusters.
Other interesting projects:
Upcoming Kubernetes events
Dec
10
Integration testing in Kubernetes, Sharding baremetal Kubernetes & Kubernetes on Windows
In-person meetup organized by Kubernetes and CNCF Finland Meetup.
Location: Helsinki, FI
This is a free event.
Dec
11
In-person conference organized by Devopsdays.
Location: Tel Aviv, IL
This event requires an entrance fee
Dec
11
In-person conference organized by Infopro Digital Trade Show.
Location: Paris, FR
This event requires an entrance fee
Dec
12
In-person conference organized by YOW!.
Location: Sydney, AU
This event requires an entrance fee
Dec
13
In-person conference organized by Devopsdays.
Location: Recife, BR
This event requires an entrance fee
Jan
26
Advanced Kubernetes course (London)
In-person workshop organized by LearnKube.
Location: London, GB
This event requires an entrance fee
Kubernetes call for papers
66
days
The Call For Paper is open until 15 February 2026 at UTC. More info →
Location: Ghent, BE
In-person conference organized by CfgMgmtCamp.
The conference starts on the 4 February 2026.
- Apply here
79
days
The Call For Paper is open until 28 February 2026 at UTC. More info →
Location: Hamburg, DE
In-person conference organized by Container Days.
The conference starts on the 4 September 2026.
- Apply here
86
days
The Call For Paper is open until 6 March 2026 at UTC. More info →
Location: Bologna, IT
In-person conference organized by CND Italy.
The conference starts on the 18 May 2026.
- Apply here
53
days
The Call For Paper is open until 2 February 2026 at UTC. More info →
Location: Aix-en-Provence, FR
In-person conference organized by Web Days.
The conference starts on the 6 February 2026.
- Apply here
4
days
The Call For Paper is open until 15 December 2025 at UTC. More info →
Location: Bangkok, TH
In-person conference organized by FOSSASIA.
The conference starts on the 10 March 2026.
- Apply here
39
days
The Call For Paper is open until 19 January 2026 at UTC. More info →
Location: Atlanta, GA, USA
In-person conference organized by Devopsdays.
The conference starts on the 21 April 2026.
- Apply here
52
days
The Call For Paper is open until 31 January 2026 at UTC. More info →
Location: Copenhagen, DK
In-person conference organized by Devopsdays.
The conference starts on the 28 April 2026.
- Apply here
10
days
The Call For Paper is open until 21 December 2025 at UTC. More info →
Location: Bucharest, RO
In-person conference organized by Incremental Development.
The conference starts on the 29 April 2026.
- Apply here
52
days
The Call For Paper is open until 31 January 2026 at UTC. More info →
Location: Prague, CZ
In-person conference organized by Devopsdays.
The conference starts on the 29 April 2026.
- Apply here
Until next time!
— Gulcan