Libros gratuitos

 Me llegaron ests libros de web code geeks :

Get Schooled By Web Code Geeks

Download FREE IT Guides!   Starting with Kotlin Cheatsheet Welcome to the Kotlin Cheatsheet! This document aims to provide you with a quick reference guide to Kotlin programming language. Whether you are a beginner getting started with Kotlin or...     Querying Graphs with Neo4j Cheatsheet This cheatsheet is your guide to effectively querying graphs using Neo4j. Whether you’re a seasoned database professional looking to expand your skills or a curious enthusiast eager to...     Getting Started with GraphQL Cheatsheet In this cheatsheet, we will embark on a journey to explore the core principles of GraphQL and its ecosystem. We'll cover topics such as schema design, querying and mutation operations,...     Starting with Windows PowerShell Cheatsheet This cheatsheet provides an overview of the most commonly used PowerShell commands, grouped by category. Whether you’re new to PowerShell or an experienced user, this cheatsheet will...     Core Python Cheatsheet This cheatsheet is intended to serve as a quick reference guide for Python programming. It covers some of the most commonly used syntax and features of the language, including data types,...     Starting with Docker Cheatsheet This guide aims to provide an overview of the key concepts and features of Docker, along with practical examples and tips for using it effectively. It covers topics such as Docker...

[O'Reilly eBook] Container Networking: From Docker to Kubernetes

 

EBOOK

Companies that begin working with containerized applications often aren’t prepared for the challenge of container networking. In this new eBook, Michael Hausenblas, a member of Red Hat’s OpenShift team, provides a detailed look at the many challenges of container networking, container orchestration, and service discovery, and shares several available solutions. Along the way, you’ll learn the capabilities of many open source tools, including Kubernetes. Download this eBook to: Get an introduction to container networking by exploring Docker networking modes Maintain a map of running containers and their locations with service discovery tools such as ZooKeeper and etcd Configure network interfaces in Linux containers by using plugins with the Container Network Interface (CNI) Learn how the Kubernetes orchestration system approaches container networking DOWNLOAD EBOOK

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Libros gratuitos de webcodegeeks

 

Download IT Guides!   The Best Web Programming Languages to Learn A more comprehensive list of tasks to which web development commonly refers, may include web engineering, web design, web content development, client liaison, client-side/server-side...     Web Developer Interview Questions A more comprehensive list of tasks to which web development commonly refers, may include web engineering, web design, web content development, client liaison, client-side/server-side...     Git Tutorial Git is, without any doubt, the most popular version control system. Ironically, there are other version control systems easier to learn and to use, but, despite that, Git is the favorite...     Docker Containerization Cookbook Docker is the world's leading software containerization platform. Docker containers wrap a piece of software in a complete filesystem that contains everything needed to run: code,...

Pants, un sistema de construcción de software multilenguaje

Pants es un sistema de construcción de software escalable. Es útil para repositorios de código de todos los tamaños, pero es particularmente valioso para aquellos que contienen múltiples piezas distintas pero interdependientes.

Pants organiza las diversas herramientas y pasos que procesan su código fuente en software implementable, que incluyen:

• Resolución de dependencia
• Generación de código
• Verificación de tipos y compilación
• Pruebas
• Linting
• Formateo
• packaging
• Introspección del proyecto

Pants es similar a herramientas como make, ant, maven, gradle, sbt, bazel y otras. Su diseño se basa en ideas e inspiración de estas herramientas anteriores, al tiempo que optimiza la velocidad, la corrección y la ergonomía en los casos de uso del mundo real de hoy.

Lo que me llamo la atención es que soporta, Python, Shell, Docker, Go, Java y Scala. Esta bueno para equipos que tengan que trabajar con varios lenguajes y tecnología y pueden compilar con una sola herramienta.  

Dejo link: https://www.pantsbuild.org/

Instalar Kafka con docker

Vamos a instalar un Kafka broker con docker y con un solo nodo, la idea es tener un Kafka andando para hacer pruebas. 

Antes de empezar tenemos que instalar Zookeper, porque Kafka depende de este, pero lo que podemos hacer es un docker compose que instale todo y listo. 

version: '2'

services:

  zookeeper:

    image: confluentinc/cp-zookeeper:latest

    environment:

      ZOOKEEPER_CLIENT_PORT: 2181

      ZOOKEEPER_TICK_TIME: 2000

    ports:

      - 22181:2181

  

  kafka:

    image: confluentinc/cp-kafka:latest

    depends_on:

      - zookeeper

    ports:

      - 29092:29092

    environment:

      KAFKA_BROKER_ID: 1

      KAFKA_ZOOKEEPER_CONNECT: zookeeper:2181

      KAFKA_ADVERTISED_LISTENERS: PLAINTEXT://kafka:9092,PLAINTEXT_HOST://localhost:29092

      KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: PLAINTEXT:PLAINTEXT,PLAINTEXT_HOST:PLAINTEXT

      KAFKA_INTER_BROKER_LISTENER_NAME: PLAINTEXT

      KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1

Como se puede ver tenemos 2 containers, uno para zookeper y otro para kafka. Lo que hacemos es un archivo docker-compose.yml, lo guardamos en un directorio y luego corremos el siguiente comando (en ese directorio) : 

docker-compose up -d

Ahora vemos si esto funciona con el comando grep en el log de kafka : 

docker-compose logs kafka | grep -i started

Si encontramos algunas lineas, estamos. 

Lo proximo a hacer es conectarnos con Kafka tool pero eso es una historia para otro post. 

Crear una base de datos cassandra con Docker

Antes de empezar tenes que tener docker andando. 

Esto es muy fácil, en dockerhub hay una imagen de cassandra : https://hub.docker.com/_/cassandra

Bueno, en consola ponemos : 

$ docker run --name some-cassandra --network some-network -d cassandra:tag

Donde some-cassandra es el nombre de la base, network es el modo de red que va utilizar y tag es la versión. Yo puse algo así: 

docker run --name demo4-cassandra --network host -d cassandra:4.0

Y listo, cassandra funcionando. 

Ahora tenemos que crear el keyspace, vamos a entrar en el container con el comando: 

docker exec -it some-cassandra bash

Que es similar a lo que ya vimos antes, yo utilice este : 

docker exec -it demo4-cassandra bash

y dentro del container vamos donde esta cassandra : 

cd /opt/cassandra/bin

cqlsh

Y ejecutamos el comando para crear el keyspace : 

cqlsh> CREATE KEYSPACE IF NOT EXISTS demo WITH REPLICATION = { 'class' : 'NetworkTopologyStrategy', 'datacenter1' : 1 };

cqlsh> use demo;

Y listo!! 

Libros Gratuitos de Java Code Geeks

 

Download IT Guides!   JMeter Tutorial JMeter is an application that offers several possibilities to configure and execute load, performance and stress tests using different technologies and protocols. It allows simulating...     Java Design Patterns A design pattern is a general reusable solution to a commonly occurring problem within a given context in software design. A design pattern is not a finished design that can be...     Elasticsearch Tutorial Elasticsearch is a search engine based on Lucene. It provides a distributed, multitenant-capable full-text search engine with an HTTP web interface and schema-free JSON documents....     Docker Containerization Cookbook Docker is the world's leading software containerization platform. Docker containers wrap a piece of software in a complete filesystem that contains everything needed to run: code,...

Libros Gratuitos de Java Code Geeks

 

Download IT Guides!   Docker Containerization Cookbook Docker is the world's leading software containerization platform. Docker containers wrap a piece of software in a complete filesystem that contains everything needed to run: code,...     Git Tutorial Git is, without any doubt, the most popular version control system. Ironically, there are other version control systems easier to learn and to use, but, despite that, Git is the favorite...     Spring Framework Cookbook The Spring Framework is an open-source application framework and inversion of control container for the Java platform. The framework's core features can be used by any Java application,...     Apache Hadoop Cookbook Apache Hadoop is an open-source software framework written in Java for distributed storage and distributed processing of very large data sets on computer clusters built from commodity...