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Bullet points:
- 1979: Unix V7 Introduced the chroot command to isolate the filesystem a process "access" to.
- Various technology was introduced up to 2006, like Virtuozzo (which patched Linux in a proprietary ways)
- 2006: Process Containers Launched by Google in 2006 was designed for limiting, accounting and isolating resource usage (CPU, memory, disk I/O, network) of a collection of processes. It was renamed “Control Groups (cgroups)” a year later and eventually merged to Linux kernel 2.6.24.
- 2008: LXC LXC (LinuX Containers) was the first, most complete implementation of Linux container manager. It was implemented in 2008 using cgroups and Linux namespaces, and it works on a single Linux kernel without requiring any patches.
- 2013: Docker Docker used LXC in its initial stages and later replaced that container manager with its own library, libcontainer. Docker offered a way to configure and manage containers, i.e a standard de-facto for this technology. As you see Docker was based on cgroups and LXC, seven-years old technologies
- On September 2014 Google published the first release of Kubernetes
- In 2015 Docker, CoreOS and others founded the Open Container Initiative's (OCI). K8s does not need docker anymore to work, but Docker traction is still strong.
References:
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Today, we are excited to release optimizations to Core ML for Stable Diffusion in macOS 13.1 and iOS 16.2, along with code to get started with deploying to Apple Silicon devices. Rif e commenti su hacker news
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NILFS is a log-structured file system supporting versioning of the entire file system and continuous snapshotting, which allows users to even restore files mistakenly overwritten or destroyed just a few seconds ago.
Discussion on Hacker NewsNILFS was developed by NTT Laboratories and published as an open-source software under GPL license, and now available as a part of Linux kernel.
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I am studying a bit of Reactjs because I got excited with Next.js.
After reading the basic tutorial, I got a bit disappointed on how to manage forms: cit
ing react doucmentation “form elements naturally keep some internal state”. So the tutorial seems to suggest an approach to keep in sync the form state with the react state object. This article cast some lights on the two ways to manage forms in reactjs: and explain the Controlled and Uncontrolled options you have.
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Nice tool to test:
Git hook scripts are useful for identifying simple issues before submission to code review. We run our hooks on every commit to automatically point out issues in code such as missing semicolons, trailing whitespace, and debug statements. By pointing these issues out before code review, this allows a code reviewer to focus on the architecture of a change while not wasting time with trivial style nitpicks.
As we created more libraries and projects we recognized that sharing our pre-commit hooks across projects is painful. We copied and pasted unwieldy bash scripts from project to project and had to manually change the hooks to work for different project structures.
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My true personal opinion based on what customers asks and what co-worker uses:
- docker , docker-compose is still the dev winner
- Podman is rising but it has no extra feature, because docker support the rootless mode too.
- Ignite – Use Firecracker VMs with Docker images (github.com/weaveworks) Super-fast VM based on container are gaining traction. Driving force are cloud providers, but this idea can eventually be helpful for some service providers.
- K8s + Helm keep going K8s is "the" abstraction layer for Cloud providers, to some extent. K8s offers tons of extension points, for automation tools and for cloud providers. The only downside is its heavy lifting: for very simple deploy (less than 3 physicals nodes) it is still an overkill in pricing and management overhead. Also it needs at least a speedy 2-Core CPU to work. Cost rising due to inflation can have a negative impact on "Fat"-K8s solution.
- Jenkins pipeline sucks It is sad to say, but GitHub actions & similia (like GitLab pipelines, Bitbucket pipelines and Cloud provider similar services like AWS CodePipeline) are a winner. Jenkins declarative pipeline are elegant, but its declarative language depends on Jenkins plugins, so you must keep track of them. Also, it is frequent to build groovy library on top of it And when you need to upgrade Jenkins from time to time, you face a lot of refactoring on pipeline syntax, and it is increasing difficult to estimate.
- docker , docker-compose is still the dev winner
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Voglio ricordare la Regina Elisabetta II come ce l’ha “disegnata” Peppa Pig, con quel pizzico di humor inglese, come quando la sovrana sa gestire domande “scottanti” come l’eventualità di poter far “sparire” gli insegnanti…
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Ukraine War brings pain, blood and a lot of human losses.
Ukraine War brings also a spike in cyber attacks, perhaps because Russian is using it like a weapon to destabilize Europe and Ukraine.
In this scenario, it is crucial to enforce your security protocols. My Company started to install a Microsoft extension to remove admin access to all employs laptop, and installed a new set of anti-malware services.
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As a mid-life greabeard that started my career on Z/OS / MVS writing JCL and running COBOL and SAS jobs, I like JavaScript. It doesn't have the obtuseness of C, the ultra-strict type-checking of Pascal, the verbosity of COBOL, class chaos of Java, the mind-bending notation of PostScript, nor the escapee from the loony bin mentality of SQL
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I was trying to explore a way to build a client/server application in Typescript; after some failed experiments, I found something better: Next.js offer the ability to build a React application and to render server-side its dynamic components.
So you can have the best of the two words: static pre-rendered pages pushed to the browser, and server side components (for doing your overwhelming BORING queries you know :)
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How to reboot a k8s pod/deployment
kubectl rollout restart deployment <deployment_name> -n <namespace>
How to show helm history
helm history -n <namespace> <deployment>
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Hosting a Git repository can be a strong need if you want to keep your projects outside the cloud providers.
Keep in mind security offered by GitHub, GitLab and Cloud providers like AWS, MS-Azure, etc are damn good (often offering 2FA, two factor authentication, for free) , so think twice before deciding to hosting your own git server. It is a good shot if you do not plan to expose it to Internet, otherwise the expertise required to secure it, it is not trivial.
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