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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
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Actualizar de Ubuntu 14.04 a 16.04

Ya ha pasado vario tiempo, desde que estoy trabajando con la versión LTS Ubuntu 14.04, pero creo que ha llegado el tiempo de actualizar a la nueva versión LTS 16.04.

Las principales razones, son que necesito trabajar con el nuevo kit de desarrollo de java 1.8 y no hay soporte oficial para la versión open source en 14.04. Aparte que nunca me sentí muy conforme con dicha versión, considero que hubieron anteriores mejores.

Esta es una guía, que les permitirá migrar de Ubuntu 14.04 a 16.04.

Paso 1: Aseguremos que estemos con las ultimas actualizaciones instaladas.
Si tenemos una versión en español, saldría algo parecido a la imagen siguiente.


Paso 2:  Abrimos la terminal, e insertamos el siguiente comando:

sudo update-manager -d

Saldra algo parecido a esta imagen.


Le damos click al botón de actualizar.
Nos aparecerá una ventana titulada "Notas de la versión" Despues de eso le damos click en actualizar.


Después del botón de actualizar, nos aparecerá una ventana mostrando los pasos de la actualización.



Cuando se termine de configurar los nuevos canales de software nos aparecerá una ventana de comenzar la actualización.


 

Despues de la instalacion de todos los paquetes, nos saldra una ventana solicitando reiniciar el sistema.





Despues de esto, tendremos listo nuestro sistema!


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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
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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
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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
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