This week on the Learn Kubernetes Weekly:

⚖️ Load balancing long-lived connections
💪 40% more performant with Cilium
👷‍♀️ Single-tenant architecture with Crossplane
🥷 1 yaml away from disaster
📚 SecurityContext with examples

Read it now: https://learnk8s.io/issues/54

In this tutorial, you will learn how to create a mutating webhook handler for namespaces using Kubebuilder.

More: https://levelup.gitconnected.com/mutating-webhook-handler-for-built-in-core-types-456aa146cc46

This article discusses Kubernetes security fundamentals and provides five practical steps to bolster security:

1. Proper configuration.
2. Image scanning.
3. Network security.
4. Controlling running applications.
5. Auditing and logging events.

More: https://blog.palark.com/kubernetes-security-best-practices

This week's 6 best Kubernetes vacancies that focus on security are:

DevSecOps Engineer with Hyperscience
💰 $190K to $260K a year
👨‍💻 Remote from the United States
→ https://kube.careers/t/ab01bf82-75af-4610-ba58-d58cd09f529a?s=55

DevSecOps Engineer with 1Password
💰 $180K to $244K a year
👨‍💻 Remote from the United States, Canada
→ https://kube.careers/t/b733b996-956e-4086-b0fa-514316485975?s=55

DevSecOps Engineer with Robinhood
💰 $169K to $255K a year
🏠 From the office in Menlo Park, CA / New York, NY / Seattle, WA / Washington, DC, USA
→ https://kube.careers/t/bcecc046-9f28-4766-aaad-e8cb41ae9aa3?s=55

DevSecOps Engineer with Palo Alto Networks
💰 $180.2K to $236.5K a year
🏠🏃🏻‍♂️🌎 Santa Clara, CA, USA
→ https://kube.careers/t/c50a52bc-e5ec-43f7-9f4c-bc0103fb9632?s=55

👉 Browse all 420 Kubernetes jobs on Kube Careers https://kube.careers

Kubelet Serving Certificate Approver is a custom approving controller which approves kubernetes·io/kubelet-serving Certificate Signing Request that kubelet uses to serve TLS endpoints.

More: https://github.com/alex1989hu/kubelet-serving-cert-approver

This article contains seven different known privilege-escalation threat vectors, which are enabled by the following permissions:

- Create Pods
- Read Secrets
- Bind Roles
- Escalate existing Roles
- Impersonate entities in the Cluster

More: https://schutzwerk.com/blog/kubernetes-privilege-escalation-01

In this tutorial, you'll learn how to sign and verify Docker distroless images with Cosign and Kyverno.

More: https://medium.com/@seifeddinerajhi/sign-and-verify-container-images-with-cosign-and-kyverno-a-complete-guide-b32b1f6e6264

By default, Kubernetes Secrets are not encrypted; values are merely base64 encoded.

And this is fine — at least, this is what Mac argues in this episode of KubeFM.

Mac says it all comes down to thinking strategically about security and where the Secrets could be leaked.

In this episode, you will learn:

- How to define a threat model to inform your security posture and mitigations.
- How Kubernetes Secrets offer sufficient guarantees for most common threat models.
- If you should use Hashicorp Vault or Kubernetes Secrets (and when not to use auto-unsealing).

Mac also covers tips and advice on becoming a security expert.

Watch it here: https://kube.fm/kubernetes-secrets-mac

Listen on:

- Apple Podcast https://kube.fm/apple
- Spotify https://kube.fm/spotify
- Amazon Music https://kube.fm/amazon
- Overcast https://kube.fm/overcast
- Pocket casts https://kube.fm/pocket-casts
- Deezer https://kube.fm/deezer

In this article, you will learn how an attacker with access to a privileged container can break out of it using a Kernel module and get access to the underlying host.

More: https://raesene.github.io/blog/2023/08/06/fun-with-privileged-container-breakout

This week on the Learn Kubernetes Weekly:

🏎️ Kubernetes image proxy cache
🏃‍♀️ Kubernetes workloads to Graviton
📈 Memory settings for Java processes in Kubernetes
🙅 What is GitOps and why is it (almost) useless?

Read it now: https://learnk8s.io/issues/55

In this tutorial, you'll learn how to set up Vault and the injector service with the Vault Helm chart.

Then, you'll deploy an app to demonstrate how the injector service handles secrets.

More: https://medium.com/@seifeddinerajhi/securely-inject-secrets-to-pods-with-the-vault-agent-injector-3238eb774342

This week's 6 best Kubernetes vacancies that focus on security are:

Security Architect with Reddit
💰 $198.2K to $297.3K a year
👨‍💻 Remote from the United States
→ https://kube.careers/t/a58310f4-745b-499e-bded-d29ef2353e11?s=55

DevSecOps Engineer with Hyperscience
💰 $190K to $260K a year
👨‍💻 Remote from the United States
→ https://kube.careers/t/ab01bf82-75af-4610-ba58-d58cd09f529a?s=55

DevSecOps Engineer with 1Password
💰 $180K to $244K a year
👨‍💻 Remote from the United States, Canada
→ https://kube.careers/t/b733b996-956e-4086-b0fa-514316485975?s=55

DevSecOps Engineer with Robinhood
💰 $169K to $255K a year
🏠 From the office in Menlo Park, CA / New York, NY / Seattle, WA / Washington, DC, USA
→ https://kube.careers/t/bcecc046-9f28-4766-aaad-e8cb41ae9aa3?s=55

👉 Browse all 428 Kubernetes jobs on Kube Careers https://kube.careers

In this article, you will learn how to create a simple yet effective incident response mechanism within Kubernetes, leveraging Falco for threat detection, CRIU for container snapshotting, and OpenFaaS for automating responses.

More: https://blog.fraktal.fi/navigating-kubernetes-incident-response-with-falco-criu-and-openfaas-285021bbdbe4

This February attend the Kubernetes Community Days Brazil 🇧🇷 and extend your stay to enjoy the iconic Brazilian Carnival!

📆 24-24 of Feb
📍 Online and São Paulo, BR

More info: https://kube.events/t/fca77347-2776-4fd6-92aa-d70c0d43e0d8?s=16

In this project, you'll learn how to create a Mutating Webhook targeting pods.

The webhook server will intercept requests to create or update pods and apply custom logic to modify the specifications before they are admitted to the cluster.

More: https://github.com/rajibmitra/pod-mutator

In this article, you will learn how to issue X.509 certificates to authenticate users to a Kubernetes cluster.

You'll also explore how to use the credential from within a NodeJS app.

More: https://krateo.medium.com/kubernetes-user-authorization-with-certificates-d3cde5897ff7

Helm is a popular tool for templating and packaging Kubernetes resources, but does it mean it's the best?

In this episode of KubeFM, Jacco draws a parallel between Helm and PHP and the similarity in which both tools became a success despite their focus on templating strings.

You will also learn:

- Helm's flaws and how you can avoid them.
- Alternative tools that can (partially) replace Helm.
- How to manage third-party packages and templating internal YAML resources.

Jacco shared several examples demonstrating duplication in Helm charts and a lack of structured typing.

Watch it here: https://kube.fm/helm-flawed-jacco

Listen on:

- Apple Podcast https://kube.fm/apple
- Spotify https://kube.fm/spotify
- Amazon Music https://kube.fm/amazon
- Overcast https://kube.fm/overcast
- Pocket casts https://kube.fm/pocket-casts
- Deezer https://kube.fm/deezer

nodegizmo is a kubectl plugin for your Kubernetes nodes that displays:

- Generic node-related information (taints, topology, etc.).
- Nodepool settings.
- Node capacity.

You can also exec into any node using nsenter pods.

More: https://github.com/Kavinraja-G/node-gizmo

k8s-secret-expiry-controller is a Kubernetes controller that watches for the expiration of Kubernetes Secrets and raises events accordingly.

More: https://github.com/devops-360-online/k8s-secret-expiry-controller

This week on the Learn Kubernetes Weekly:

😩 Handling pods when nodes fail
🕵️ Troubleshooting missing logs
📈 Optimizing scalability and cost-efficiency with Karpenter
🗜️ Setting Java Heap size in Docker
💅 Labels and annotations

Read it now: https://learnk8s.io/issues/56

This article describes the challenges and solutions to connecting kubectl from your local computer to a private GKE cluster while impersonating a service account.

More: https://medium.com/compendium/accessing-private-gke-cluster-using-bastion-host-and-service-account-impersonating-bac11c86deac