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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: Alwa...
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Algunos puntos al momento de trabajar con MYSQL

Estoy haciendo un pequeno programa, de manejo de horarios.
Decide usar MYSQL para dicha apliacion. Aqui voy a escribir algunos puntos importantes que tengo que tener en cuenta al momento de manejar mysql.

Estoy usando como sistema operativo Ubuntu 11.10. Si desean saber como instalar mysql pueden ver este link (https://help.ubuntu.com/11.04/serverguide/C/mysql.html)

Comando para ingresar a nuestra base de datos

  • mysql -u usuario -p
    donde usuario es el usuario que ustedes crearon o el usuario rooot, que es el que se crea por default. -p indica que espera el parametro de la contrasena.(Password en ingles)

Comando para crear la base de datos

  • CREATE DATABASE NOMBRE

Comando para acceder a la base de datos

  • use nombre
    Donde nombre es el nombre de la base de datos

Comando para crear una table con llave primaria

Comando para crear table con llave foranea

  • CREATE TABLE consumidor (fecha DATE NOT NULL, hora TIME NOT NULL, codigo_id INT NOT NULL, PRIMARY KEY (fecha, hora), FOREIGN KEY (codigo_id) REFERENCES nombre_table (id) ON UPDATE CASCADE ON DELETE RESTRICT) ENGINE=INNODB;

Supongamos que tenemos nuestra base de datos en un archivo te texto y deseamos importar la informacion. Este es el comando

  • LOAD DATA LOCAL INFILE '/home/diego/NetBeansProjects/a.txt' INTO TABLE nombre_table;

Espero que les sirva un poco

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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: Alwa...
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Ansible using plugins for dynamic inventories

This is a small post about how to use inventory plugins in Ansible. If you are looking the script way I recommend to read this article: http://gloriasilveira.com/setting-up-ansible-for-aws-with-dynamic-inventory-ec2.html It explains really good this or you can watch this video: https://www.youtube.com/watch?v=LnbqO1kTPqE&t=6s But if you’re looking to use inventory this article can help you. First of all, why should I used inventory if all over the internet they’re using the python scripts? Well, Ansible recommends it: Inventory plugins take advantage of the most recent updates to Ansible’s core code. We recommend plugins over scripts for dynamic inventory. You can write your own plugin to connect to additional dynamic inventory sources. https://docs.ansible.com/ansible/latest/user_guide/intro_dynamic_inventory.html The actual ansible guide is quite good, but there was a step that got me confused, probably my english isn’t so good and I didn’t understood it. We need to ena...
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