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Understanding Liveness, Readiness and Startup Probes in Kubernetes

 This is a small article about understanding the liveness, readiness and startup in kubernetes.  There's good explanation in the kubernetes documentation: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ This video also explains well the process: https://www.youtube.com/watch?v=aTlQBofihJQ But I wanted to understand it in a practical way. So I have this demo: https://github.com/DiegoTc/guest-book-js-docker/tree/Running-App-Version-1 It's a simple application running on a kubernetes cluster. https://github.com/DiegoTc/guest-book-js-docker/blob/Running-App-Version-1/argo/deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: chat-ui spec: replicas: 1 revisionHistoryLimit: 3 selector: matchLabels: app: chat-ui template: metadata: labels: app: chat-ui spec: containers: - image: diegotc/guestbook:20230803-064434 imagePullPolicy: Always nam

How I miss you Synaptic!

Several years  have passed since we saw the Synaptic included in Ubuntu. You can found reasons here .
So in a clear english the reason was to have a better add/remove program for users. A friendly application. The explanation sounds good, I didn't complain about that, until right now. Ubuntu has change a lot, it's really a friendly user OS.

I have use CLI when necessary, but today I couldn't believe it.
I'm a Google Chrome user, I know you will tell me it's not open source or I should use Chromium or FF. But no. I'm a user of Google Chrome, and many people also prefer Chrome over Chromium, so why it should be quite complex remove it? If Ubuntu wants to be more friendly user why you should use the terminal for removing one of the most popular web browsers? I could understand if is a browser few people use, a good reason. But not a popular browser, Chrome is one of the most popular browsers on the world!

A screen shot of the Ubuntu Software Center, trying to remove Google Chrome.
No results, not even a message telling no results found. This is not a friendly user application!



So, I decided to check Synaptic to see if it was possible to remove Google Chrome yes it's so simple.












So please tell me, I'm wrong or I'm right. What's your opinion?



Comentarios

  1. Something is not right. I typed "Chrome" in the search and after clicking "Show 31 technical items" I was able to uninstall Google Chrome.
    https://www.dropbox.com/s/wgxus1wj1hzh9c5/Uninstall%20chrome%20for%20USC.png

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    Respuestas
    1. That's strange, do you have an extra configuration? I have Ubuntu install by default.

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    2. Normal Ubuntu 14.04. I installed Chome by downloading .deb (64bit) file from https://www.google.com/chrome/browser/ and that's it.

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    3. I did the the same, but I can't remove it from the Ubuntu Software Center

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    4. Oh, just noticed your screenshot is from "Installed" tab. There I can't find Chrome, but it is shown in "All Software" tab. Weird and stupid.

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  2. Of course it does not work. app-install-data only ships files for packages shipped with Ubuntu. And because of that, Chrome is not recognized as a graphical application, but treated like a normal package.

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    Respuestas
    1. I know that. My point is they took synaptic because the Ubuntu Software Center was going to be better, a more friendly user application, and at the end, it doesn't work for removing one of the most popular browsers on the web

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  3. If you didn't use Ubuntu Software Center to install Chrome, I think it's reasonable to then find that Ubuntu Software Center cannot remove it.

    Sure, it'd be nice if it could. But given that it specifically tries to make things simpler, supporting complex things you did that it doesn't support has no need to be a priority.

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    Respuestas
    1. I understand your point, but if you need to use CLI for removing the most popular browser there's an issue.

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Understanding Liveness, Readiness and Startup Probes in Kubernetes

 This is a small article about understanding the liveness, readiness and startup in kubernetes.  There's good explanation in the kubernetes documentation: https://kubernetes.io/docs/tasks/configure-pod-container/configure-liveness-readiness-startup-probes/ This video also explains well the process: https://www.youtube.com/watch?v=aTlQBofihJQ But I wanted to understand it in a practical way. So I have this demo: https://github.com/DiegoTc/guest-book-js-docker/tree/Running-App-Version-1 It's a simple application running on a kubernetes cluster. https://github.com/DiegoTc/guest-book-js-docker/blob/Running-App-Version-1/argo/deployment.yaml apiVersion: apps/v1 kind: Deployment metadata: name: chat-ui spec: replicas: 1 revisionHistoryLimit: 3 selector: matchLabels: app: chat-ui template: metadata: labels: app: chat-ui spec: containers: - image: diegotc/guestbook:20230803-064434 imagePullPolicy: Always nam

Getting Docker Syntax In Gedit

I have been working with docker in the last days, and encounter the syntax issue with gedit. Just pure plain text. So make a small search and found an easy way for fixing this. I found Jasper J.F. van den Bosch repository in GitHub and found the solution for this simple problem. We need to download the docker.lang file, available here:  https://github.com/ilogue/docker.lang/blob/master/docker.lang After that, you go to the folder you save the file and do the following command. sudo mv docker.lang /usr/share/gtksourceview-3.0/language-specs/  If this doesn't work you can try the following: sudo mv docker.lang  ~/.local/share/gtksourceview-3.0/language-specs/ And that's all! Screenshot of gedit with no docker lang Screenshot of gedit with docker lang

Using the calculator in the terminal

Hi to all, this is a small issue I had the last days. Use a calculator in the terminal. I have been working and sometimes need to do an arithmetic operation so I decided to open  calc (Ubuntu Calculator Default). But I was wondering, there has to be a way to use a calculator in the CLI. So after some search in the engine I found this question in Ask Ubuntu and tried several options. I will only write about the  best solution I found for my needs. In the question, you can find several solutions and probably you will find a different solution that will be best for you. CALC (Arbitrary precision calculator) Calc is an arbitrary precision arithmetic system that uses a C-like language. Calc is useful as a calculator, an algorithm prototyper and as a mathematical research tool. More importantly, calc provides one with a machine independent means of computation. Calc comes with a rich set of builtin mathematical and programmatic functions. If you want to install calc you can use th