catalog
gvisor
catalog | gvisor | |
---|---|---|
1 | 73 | |
38 | 15,828 | |
- | 1.3% | |
8.2 | 9.9 | |
12 days ago | 4 days ago | |
Dockerfile | Go | |
- | Apache License 2.0 |
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
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.
catalog
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My VM is lighter (and safer) than your container
Most should already exist on your mac if you do development... it seems to rely on qemu, unsurprisingly... openjdk as well (probably to support Java out-of-the-box?), imagegick etc.
Took a few minutes to finish installing... the CLI seems to be based on the Docker commands (build, clean, run, 'net create', inspect etc.), some package-manager like commands ('pkg info', 'pkg pull', 'pkg list' etc.), a bunch of "cloud" commands (I suppose that's the non-free part) and "compose" commands just like docker-compose. Interesting stuff.
Not for the parent commenter: the Lua link in the landing page is broken: https://github.com/unikraft/catalog/tree/main/examples/http-...
I tried to run the C hello world example... I get an error, it wants to run Docker?!?! I thought the whole point was to avoid Docker (and containers)??
Here's the log:
i creating ephemeral buildkit container
gvisor
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Comparing 3 Docker container runtimes - Runc, gVisor and Kata Containers
Although the documentation also mentions "youki", that is mentioned as a "drop-in replacement" of the default runtime basically doing the same, so let's stick with runc. The second runtime will be Kata runtime from Kata containers, since it runs small virtual machines which is good for showing how differently it uses the CPU and memory. This also adds a higher level of isolation with some downsides as well. And the third runtime will be runsc from gVisor which is a perfect third runtime to see how we can run containers and still have a little more secure isolation. I will show how we can recognize the differences by running commands from the isolated environments and from the host.
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GVisor: Linux-Compatible Sandbox
I find the README of the repo much better to quickly understand what this software is and isn't.
https://github.com/google/gvisor
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Unfashionably secure: why we use isolated VMs
If you think about it virtualization is just a narrowing of the application-kernel interface. In a standard setting the application has a wide kernel interface available to it with dozens (ex. seccomp) to 100's of syscalls. A vulnerablility in any one of which could result in complete system compromise.
With virtualization the attack surface is narrowed to pretty much just the virtualization interface.
The problem with current virtualization (or more specifically, the VMM's) is that it can be cumbersome, for example memory management is a serious annoyance. The kernel is built to hog memory for cache and etc. but you don't want the guest to be doing that - since you want to overcommit memory as guests will rarely use 100% of what is given to them (especially when the guest is just a jailed singular application), workarounds such as free page reporting and drop_caches hacks exist.
I would expect eventually to see high performance custom kernels for a application jails - for example: gVisor[1] acts as a syscall interceptor (and can use KVM too!) and a custom kernel. Or a modified linux kernel with patched pain points for the guest.
[1] <https://gvisor.dev/>
- Syd the perhaps most sophisticated sandbox for Linux
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Hacking Alibaba Cloud's Kubernetes Cluster
Hillai: Following our research, Alibaba took several steps to address the vulnerabilities we discovered. They limited image pull secret permissions to read-only access, preventing unauthorized uploads. Additionally, they implemented a secure container technology similar to Google's gVisor project. This technology hardens containers and makes them more difficult to escape from, adding another layer of security.
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We Improved the Performance of a Userspace TCP Stack in Go by 5X
If you want to use netstack without Bazel, just use the go branch:
https://github.com/google/gvisor/tree/go
go get gvisor.dev/gvisor/pkg/tcpip@go
The go branch is auto generated with all of the generated code checked in.
- My VM is lighter (and safer) than your container
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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
What are some alternatives?
container-shell - Starts and attaches a sandboxed shell using docker with access to the current or project directory
firecracker - Secure and fast microVMs for serverless computing.
podman - Podman: A tool for managing OCI containers and pods.
wsl-vpnkit - Provides network connectivity to WSL 2 when blocked by VPN
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/
sysbox - An open-source, next-generation "runc" that empowers rootless containers to run workloads such as Systemd, Docker, Kubernetes, just like VMs.
containerd - An open and reliable container runtime
KubeArmor - Runtime Security Enforcement System. Workload hardening/sandboxing and implementing least-permissive policies made easy leveraging LSMs (BPF-LSM, AppArmor).
WSL - Issues found on WSL
for-mac - Bug reports for Docker Desktop for Mac
podman-desktop - launch and setup vms for podman
Podman Desktop - Podman Desktop is the best free and open source tool to work with Containers and Kubernetes for developers. Get an intuitive and user-friendly interface to effortlessly build, manage, and deploy containers and Kubernetes — all from your desktop.