Kubesploit

This article explains how to use iptables to enhance security in a Kubernetes network.

It covers the default policy, managing rules, and keeping configurations after reboots.

More: https://itnext.io/shielding-your-kubernetes-network-mastering-iptables-for-enhanced-security-7286540b2f17

This tutorial explores how to use cert-manager to manage Kubernetes Gateway certificates automatically.

More: https://addozhang.medium.com/automated-kubernetes-gateway-certificates-management-with-cert-manager-b6b43bb6c5ea

This article discusses the validating admission webhook bypass vulnerability, which allows node updates to bypass a validating admission webhook.

You will learn how to detect this type of event by enabling Kubernetes Audit Logging in the cluster.

More: https://sysdig.com/blog/cve-2021-25735-kubernetes-admission-bypass

Bank-Vaults is an umbrella project which provides various tools for Cloud Native secret management, including:

- Bank-Vaults CLI to configure Hashicorp Vault.
- Vault operator.
- Vault secrets webhook to inject secrets.
- Vault SDK

More: https://github.com/bank-vaults/bank-vaults

Kubernetes in action: from pods to production-ready clusters!

📆 Learnk8s runs a 4-day Advanced Kubernetes course in 🇺🇸 San Francisco on Oct 21!

You will learn how to:

1️⃣ Architect and design resilient clusters (in the cloud or on-prem).
2️⃣ Master deployment strategies and resource management.
3️⃣ Wire the cluster network and trace packets flowing through it.
4️⃣ Secure your cluster with the latest best practices.
5️⃣ Autoscale, manage data and stateful workloads, monitoring and more.

What you need to know:

✅ 40% lecture, 60% hands-on labs.
✅ Small groups for personalized learning.
✅ Progresses from basics to advanced topics.
✅ Lifetime access to course materials and Slack community.

Ticket and info: https://kube.events/t/3aa0148a-d54a-471c-adbc-cc5cabb86d23

Corporate training: https://learnk8s.io/corporate-training

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

DevSecOps Engineer with Worldcoin
💰 $236K to $323K a year
🏠 From the office in San Francisco, CA, USA
→ https://kube.careers/t/e824f971-4831-4329-8dfd-2edcce0c9ed5?s=55

DevSecOps Engineer with Jobs for Humanity
💰 $189.1K to $317.69K a year
🏠 From the office in Bellevue, WA, USA
→ https://kube.careers/t/47e00ae5-bef2-4118-9059-c45081d02892?s=55

Security Architect with Dexterity
💰 $200K to $300K a year
🏠 From the office in Redwood, CA, USA
→ https://kube.careers/t/b9a90583-a0e8-4f13-b776-839c8b1d6275?s=55

DevSecOps Engineer with Alchemy
💰 $135K to $350K a year
👨‍💻 Remote from the United States
→ https://kube.careers/t/1f5bb0f9-8812-4cfe-968d-cd2e1d1cbeaa?s=55

DevSecOps Engineer with Crusoe
💰 $180K to $300K a year
🏠🏃🏻‍♂️🌎 San Francisco, CA, USA
→ https://kube.careers/t/cc2ab37b-4b47-4dc0-9199-04269d9e3607?s=55

👉 Browse all 1390 Kubernetes jobs on Kube Careers https://kube.careers

This article explains how to streamline multi-cloud Kubernetes access using OpenID Connect (OIDC) to overcome the complexities of managing secure, consistent Kubernetes access across a multi-cloud environment.

More: https://medium.com/@mnkg561/streamlining-multi-cloud-kubernetes-access-using-oidc-a1380dd1a6af

This week on Learn Kubernetes Weekly 99:

💸 How we Saved 10s of thousands of dollars deploying low cost open source AI technologies at scale with Kubernetes
🐳 Recent Docker BuildKit features you're missing out on
🚦 Scheduling priority In multi-team Kubernetes cluster
🌲 How to structure your Argo CD repositories using Application Sets
🏎️ Solving CPU throttling issue in Golang applications before hitting the CPU limit in Kubernetes

Read it now: https://learnk8s.io/issues/99

🌟 Are you ready to double your Kubernetes resource utilization?
StormForge, the sponsor for this issue, has built an HPA-compatible vertical pod rightsizing solution designed to help you save Mem/CPU and optimize your cloud bill. You can try it for free here: https://stormforge.io/optimize-live/?utm_source=Learnk8s&utm_medium=email&utm_campaign=learnk8s-sow2-2024

RBAC Wizard is a tool that helps you visualize and analyze the RBAC configurations of your Kubernetes cluster.

More: https://github.com/pehlicd/rbac-wizard

Eric Jalal, an independent consultant and Kubernetes developer, explains how Kubernetes is fundamentally built on familiar Linux features. He discusses why understanding Linux is crucial for working with Kubernetes and how this knowledge can simplify your approach to cloud-native technologies.

You will learn:

- Why Eric considers Kubernetes to be "just Linux" and how it wraps existing Linux technologies.
- The importance of understanding Linux fundamentals (file systems, networking, storage).
- How Kubernetes provides a standard and consistent interface for managing Linux-based infrastructure.
- Why learning Linux deeply can make Kubernetes adoption an incremental step rather than a giant leap.

Watch (or listen to) it here: https://kube.fm/kubernetes-just-linux-eric

🌟 This episode is sponsored by Learnk8s — get started on your Kubernetes journey through comprehensive online, in-person or remote training. https://learnk8s.io/training

With @Birthmarkb "Impactful voice" Farrell

The article discusses container image sizes, security, and best practices.

It compares Alpine, Distroless, and Scratch images, highlighting their size, packages, and CVE differences. Chainguard, UBI Micro, and Chiseled are mentioned as alternatives.

More: https://medium.com/@mabenoit/alpine-distroless-or-scratch-caac35250e0b

Nicholas Morey, Senior Developer Advocate at Akuity, advises against managing your own secrets manager.

Drawing from personal experience, he highlights the challenges of misconfigurations, troubleshooting outages, and maintaining security.

Watch the full interview: https://kube.fm/kargo-gitops-nicholas

This interview is a reaction to Mac's episode https://kube.fm/kubernetes-secrets-mac

vals-operator syncs secrets from any secrets store supported by vals into Kubernetes.

It works similarly to secrets-manager, but it supports more secret stores other than HashiCorp Vault.

More: https://github.com/digitalis-io/vals-operator

AWACS for RBAC (AWRBACS) provides a view of a cluster's RBAC by automating the retrieval of users and service accounts or providing a dump of users defined in LDAP.

It checks individual permissions on each resource in the cluster.

More: https://lobuhisec.medium.com/awrbacs-awacs-for-rbac-b6cb2ac75e3e

Why Kubernetes doesn't rebalance pods in nodes?

Learnk8s runs a 4-day Advanced Kubernetes course next week in London 🇬🇧, and you will get to the bottom of questions like this (spoiler: the scheduler allocates pods when created, and it doesn't re-evaluate decisions).
You will also learn the nitty-gritty details of the Kubernetes architecture:

- How pods can serve traffic even if the control plane is unavailable.
- Why does Kubernetes run a single controller manager and scheduler even in HA?
- Why does the kubelet prefer to poll for updates rather than the master dispatching events?

This (and much more) is covered on the second day of the course.

You can find the full agenda, a breakdown of the modules and how to sign up here: https://kube.events/t/06d19f85-4645-42f7-87c5-040888900b9d

Are you training your team?
Customize the workshop in full with corporate training https://learnk8s.io/corporate-training

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

DevSecOps Engineer with Worldcoin
💰 $236K to $323K a year
🏠 From the office in San Francisco, CA, USA
→ https://kube.careers/t/e824f971-4831-4329-8dfd-2edcce0c9ed5?s=55

DevSecOps Engineer with Jobs for Humanity
💰 $189.1K to $317.69K a year
🏠 From the office in Bellevue, WA, USA
→ https://kube.careers/t/47e00ae5-bef2-4118-9059-c45081d02892?s=55

Security Architect with Dexterity
💰 $200K to $300K a year
🏠 From the office in Redwood, CA, USA
→ https://kube.careers/t/b9a90583-a0e8-4f13-b776-839c8b1d6275?s=55

DevSecOps Engineer with ServiceNow
💰 $181.1K to $316.9K a year
👨‍💻 Remote from the United States
→ https://kube.careers/t/46e8c8b9-7122-4ba5-b2a6-a70d6089f758?s=55

DevSecOps Engineer with Alchemy
💰 $135K to $350K a year
👨‍💻 Remote from the United States
→ https://kube.careers/t/1f5bb0f9-8812-4cfe-968d-cd2e1d1cbeaa?s=55

👉 Browse all 1411 Kubernetes jobs on Kube Careers https://kube.careers

This article demonstrates supply chain security:

- Cosign, Kyverno, and HashiCorp Vault to secure container images in Kubernetes
- GitLab CI to build, push, and sign images with Cosign and Vault.
- Kyverno to enforce policies for signature verification.

More: https://angapov.medium.com/kubernetes-container-images-signing-using-cosign-kyverno-hashicorp-vault-and-gitlab-ci-c4e2041d1310

This week on Learn Kubernetes Weekly 98:

🧐 AWS VPC Flow Logs, NAT Gateways, and Kubernetes pods: a detailed overview
🐳 How does a Docker container work internally?
📊 Kubernetes fine-grained horizontal pod autoscaling with Container Resource Metrics @Chimbu Chinnadurai
♻️ Rendering the TRUE Argo CD diff on your PRs
📦 What is the difference between a root process and a containerized root process?

Read it now: https://learnk8s.io/issues/98

🌟 Are you ready to double your Kubernetes resource utilization?
StormForge, the sponsor for this issue, has built an HPA-compatible vertical pod rightsizing solution designed to help you save Mem/CPU and optimize your cloud bill. You can try it for free here: https://stormforge.io/optimize-live/?utm_source=Learnk8s&utm_medium=email&utm_campaign=learnk8s-sow2-2024

This article explores an alternative to long-lived credentials in EKS.

IAM Roles, EKS Pod Identity, OIDC Integration, IAM Roles Anywhere, AWS IAM Identity Center, and Service Account provide alternatives to long-lived credentials.

More: https://medium.com/mycloudseries/alternatives-to-long-lived-credentials-in-aws-29c2582b513f

Alexandre Souza, a senior platform engineer at Getir, explores the challenges of over-provisioning and under-provisioning and discusses strategies for optimizing resource allocation using tools like Horizontal Pod Autoscaler (HPA) and Vertical Pod Autoscaler (VPA).

You will learn:

- How to set appropriate resource requests and limits to balance application performance and cost-efficiency in large-scale Kubernetes environments.
- Strategies for implementing and configuring Horizontal Pod Autoscaler (HPA), including scaling policies and behavior management.
- The differences between CPU and memory management in Kubernetes and their impact on workload performance.

Watch (or listen to) it here: https://kube.fm/hpa-at-scale-alex

🌟 This episode is sponsored by VictoriaMetrics. Start a free trial for VictoriaMetrics enterprise today https://victoriametrics.com/products/enterprise/?utm_campaign=LearnK8s&utm_medium=podcast&utm_source=Learnk8s

With @Birthmarkb "Peter Pan" Farrell