kubernetes-network-policy-recipes
gvisor
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kubernetes-network-policy-recipes | gvisor | |
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13 | 64 | |
5,486 | 15,099 | |
- | 3.0% | |
4.6 | 9.9 | |
about 1 month ago | 2 days ago | |
Go | ||
Apache License 2.0 | Apache License 2.0 |
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For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.
kubernetes-network-policy-recipes
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Kubernetes Security
Further reading: Controlling Access to Kubernetes API What is TLS Configure Service Accounts Dynamic Admission Control Network Policy Recipes
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stopping namespaces to talk with each other
See: https://github.com/ahmetb/kubernetes-network-policy-recipes/blob/master/04-deny-traffic-from-other-namespaces.md for an example of what you are looking to do.
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Multi-tenancy in Kubernetes
This is not great for multi-tenancy, but you can correct this with NetworkPolicies.
- Please check thoroughly anything you copy and paste - ahmetb/kubernetes-network-policy-recipes: Example recipes for Kubernetes Network Policies that you can just copy paste
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11 Resources that will make you a Kubernetes wizard in no time
đź”— https://github.com/ahmetb/kubernetes-network-policy-recipes
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Data and System Visualization Tools That Will Boost Your Productivity
I'd recommend using this collection of network policy recipes to test out these 2 tools and see how they can be helpful to your workflow.
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How to block access to pods from host? NetworkPolicy not working
Here's an example policy I've tried. https://github.com/ahmetb/kubernetes-network-policy-recipes/blob/master/03-deny-all-non-whitelisted-traffic-in-the-namespace.md
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Cleared my CKA exam with a score of 92%. Here are a few tips
The Network Policies recipes here: https://github.com/ahmetb/kubernetes-network-policy-recipes -- Do not under any circumstances overlook this goldmine of network policy examples. Super important.
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How to learn and practice more in Kubernetes Network Policy for CKx exams and EKS ?
Good to learn more in Kubernetes network policy for CKx exams and EKS. Below are resources: 1/ read official doc and try to understand them well - https://kubernetes.io/docs/concepts/services-networking/network-policies/ 2/ bookmark samples for exams and EKS setups - https://kubernetes.io/docs/concepts/services-networking/network-policies/#networkpolicy-resource 3/ do more practices at https://github.com/ahmetb/kubernetes-network-policy-recipes 4/ visualize (image below) and try more at https://editor.cilium.io/ - it allows you to save the final netpol in k8s netpol OR Cilium netpol (EKS-A is using Cilium !)
- CKAD Exam Lab
gvisor
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Maestro: A Linux-compatible kernel in Rust
Isn't gVisor kind of this as well?
"gVisor is an application kernel for containers. It limits the host kernel surface accessible to the application while still giving the application access to all the features it expects. Unlike most kernels, gVisor does not assume or require a fixed set of physical resources; instead, it leverages existing host kernel functionality and runs as a normal process. In other words, gVisor implements Linux by way of Linux."
https://github.com/google/gvisor
- Google/Gvisor: Application Kernel for Containers
- GVisor: OCI Runtime with Application Kernel
- How to Escape a Container
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Faster Filesystem Access with Directfs
This sort of feels like seeing someone riding a bike and saying: why don’t they just get a car? The simple fact is that containers and VMs are quite different. Whether something uses VMX and friends or not is also a red herring, as gVisor also “rolls it own VMM” [1].
[1] https://github.com/google/gvisor/tree/master/pkg/sentry/plat...
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OS in Go? Why Not
There's two major production-ready Go-based operating system(-ish) projects:
- Google's gVisor[1] (a re-implementation of a significant subset of the Linux syscall ABI for isolation, also mentioned in the article)
- USBArmory's Tamago[2] (a single-threaded bare-metal Go runtime for SOCs)
Both of these are security-focused with a clear trade off: sacrifice some performance for memory safe and excellent readability (and auditability). I feel like that's the sweet spot for low-level Go - projects that need memory safety but would rather trade some performance for simplicity.
[1]: https://github.com/google/gvisor
[2]: https://github.com/usbarmory/tamago
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Tunwg: Expose your Go HTTP servers online with end to end TLS
It uses gVisor to create a TCP/IP stack in userspace, and starts a wireguard interface on it, which the HTTP server from http.Serve listens on. The library will print a URL after startup, where you can access your server. You can create multiple listeners in one binary.
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How does go playground work?
The playground compiles the program with GOOS=linux, GOARCH=amd64 and runs the program with gVisor. Detailed documentation is available at the gVisor site.
- Searchable Linux Syscall Table for x86 and x86_64
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Multi-tenancy in Kubernetes
You could use a container sandbox like gVisor, light virtual machines as containers (Kata containers, firecracker + containerd) or full virtual machines (virtlet as a CRI).
What are some alternatives?
ckad-questions - A set of exercises and solutions to prepare for the Certified Kubernetes Application Developer exam by Cloud Native Computing Foundation.
firecracker - Secure and fast microVMs for serverless computing.
CKAD-exercises - A set of exercises to prepare for Certified Kubernetes Application Developer exam by Cloud Native Computing Foundation
podman - Podman: A tool for managing OCI containers and pods.
cka-learning
wsl-vpnkit - Provides network connectivity to WSL 2 when blocked by VPN
jsonvisio.com - đź”® Seamlessly visualize your JSON data instantly into graphs; paste, import or fetch! [Moved to: https://github.com/AykutSarac/jsoncrack.com]
kata-containers - Kata Containers is an open source project and community working to build a standard implementation of lightweight Virtual Machines (VMs) that feel and perform like containers, but provide the workload isolation and security advantages of VMs. https://katacontainers.io/
vagrant-kubernetes - Playground for setting up small Kubernetes cluster on some vagrant boxes and practice with various examples to get familiar with K8s.
sysbox - An open-source, next-generation "runc" that empowers rootless containers to run workloads such as Systemd, Docker, Kubernetes, just like VMs.
CKAD_labs - Includes labs I have done as part of preparation for CKAD exam
containerd - An open and reliable container runtime