https://github.com/cristianperez/docker-loadbalancer-nginx

We've already create a load balancer based in nginx, and 3 containers with a express api, we are using docker compose.
https://github.com/cristianperez/docker-loadbalancer-nginx

Last synced: about 2 months ago
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We've already create a load balancer based in nginx, and 3 containers with a express api, we are using docker compose.

• Host: GitHub
• URL: https://github.com/cristianperez/docker-loadbalancer-nginx
• Owner: cristianPerez
• License: mit
• Created: 2020-07-09T03:18:23.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2022-12-11T13:19:35.000Z (about 2 years ago)
• Last Synced: 2023-08-29T14:41:45.369Z (over 1 year ago)
• Language: Dockerfile
• Size: 257 KB
• Stars: 2
• Watchers: 2
• Forks: 0
• Open Issues: 8
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Docker basics.

We are going to create a load balancer with multiple containers and one network.

We are using nginx.

## Basics.

```

🐳🐳🐳🐳🐳 Docker basics 🐳🐳🐳🐳🐳🐳

>> docker ps

=> EN

  => You can see the state of running containers.

=> ES

  => Estado de contenedores docker en ejecución.

>> docker ps -a

=> EN

  => You can see the state of running containers and not running containers.

=> ES

  => El estado de contenedores incluyendo los que no estan en ejecución.

>> docker inspect [id] or [name]

=> EN

  => Shows the metadata in a specific container by id.

  => Really important in development if you want to see the env vars.

=> ES

  => Muestra la metada del contenedor.

  => Muy importante al desarrollar y querer por ejemplo obtener un variable de entorno.

>> docker inspect -f '{{ json .Config.Env }}' [id] or [name]

=> EN

  => Filtered metadata and parsed to json.

  => The filter format is in GO, Docker was made in GO.

=> ES

  => Metadata filtrada y parseada a json

  => El formato del filtro es Go, docker esta hecho en Go.

  => json significa el format que le quiero hacer.

  => El .Config.Env significa las variables que busco.

>> docker rename [old_name] [new_name]

=> EN

  => Rename a container.

=> ES

  => Renombra un contenedor

>> docker run --name [new_name] [imagen]

=> EN

  => Rename and run the container.

  => The flag --mame allow us to change the starting name.

=> ES

  => Renombra y corre la imagen hello-world

  => La bandera --name nos permite colocar un nombre de entrada.

>> docker logs [id] or [name]

=> EN

  => Showing the logs by container's id or name.

  => Show logs does not exec egaint the container.

>> docker logs hola-mundo

  => ES

  => Muestra los logs pero no ejecuta de nuevo el contenedor.

>> docker rm [id] or [name]

=> EN

  => It deletes a container by name or id.

  => ES

  => Elimina un contenedor

>> docker ps -aq

=> EN

  => It only shows the containe's ids.

=> ES

  => Muestra unicamente los ids de los contenedores.

>> docker rm $(docker ps -aq)

=> EN

  => You can delete all containers in bash.

=> ES

  => Elimina una lista de contenedores por id

>> docker run ubuntu

=> EN

  => It only download the ubuntu image from dockerhub.

  => After that just ran /bin/bash

=> ES

  => se descarga la imagen de ubuntu.

  => solo corrio /bin/bash

>> docker run -it ubuntu

=> EN

  => -it allow us to comunicate our bash terminal with the container's terminal.

  => -it minds interactive terminal. 

=> ES

  => -it Me deja la terminar del contenedor abierta en mi bash.

  => Ahora quedamos en ubuntu.

🐳🐳🐳🐳🐳

Live cycle in containers:

Ciclo de vida de un contenedor:

🐳🐳🐳🐳🐳

>> docker run ubuntu tail -f /dev/null

=> EN

  => Create a container widthout shoutdown.

=> ES

  => Crear un contenedor que no se apague.

>> docker rm -f [id container]

=> EN

  => One container just shitdown if:

  => The user root is broken or it finished the work to done.

=> ES

  => Un contenedor solo se apaga si su comando

  => root deja de funcionar o termina lo

  => que debia hacer.

>> docker run -d --name server nginx

=> EN

  => The flag -d minds detach terminal.

=> ES

  => Decimos --detach(-d) si esto tiene

  => output, no quiero estar atachado a el.

>> docker run -d --name server -p 8080:80 nginx

=> EN

  => The flag -p minds publisher.

  => It help us to publish one port in our machine and connect it with

  => the another container's port.

  => 8080 port in my host.

  => 80 port in my container.

=> ES

  => La bandera -p Significa publisher

  => Sirve para publicar un puerto de mi

  => maquina y conectarlo con el del contenedor

  => 8080 significa mi host

  => 80 significa el puesto del contenedor

=> EN

  => If we run localhost:8080 in the browser.

  => We can see our nginx.

=> ES

  => Si corremos localhost:8080 en el navegador

  => podremos ver nuestro nginx

>> docker run -d --name db mongo

=> EN

  => Running a database.

=> ES

  Corriendo una base de datos.

```