Docker Networking #09

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Docker Explained: Docker Architecture | Docker Registries

Following the second video about Docker basics, in this video, I explain Docker architecture and explain the different building blocks of the docker engine; docker client, API, Docker Daemon. I also explain what a docker registry is and I finish the video with a demo explaining and illustrating how to use Docker hub

In this video lesson you will learn:

• What is Docker Host
• What is Docker Engine
• Learn about Docker Architecture
• Learn about Docker client and Docker Daemon
• Docker Hub and Registries
• Simple demo to understand using images from registries

#docker #docker hub #docker host #docker engine #docker architecture #api

Docker Bridge Network

Hello readers,

This blog will tell you about the docker bridge network. Its use with some basic use cases also how to bridge networks different from the network.

One of the reasons Docker containers and services are so powerful is that you can connect them together, or connect them to non-Docker workloads.

Docker Network

Docker’s networking subsystem is pluggable, using drivers. Several drivers exist by default, and provide core networking functionality:

Type of docker Network :

• bridge: The default network driver. If you don’t specify a driver, this is the type of network you are creating. Bridge networks allow your applications to run in standalone containers that need to communicate.
• host: For standalone containers, remove network isolation between the container and the Docker host, and use the host’s networking directly. The host is available for swarm services on Docker 17.06 and higher.
• overlay: Overlay networks connect multiple Docker daemons together and enable swarm services to communicate with each other. You can also use overlay networks to facilitate communication between a swarm service and a standalone container, or between two standalone containers on different Docker daemons.
• macvlan: Macvlan networks allow you to assign a MAC address to a container, making it appear as a physical device on your network. The Docker daemon routes traffic to containers by their MAC addresses.
• none: For this container, disable all networking. Usually used in conjunction with a custom network driver.

Let create a bridge network with name alpine-net . Start two alpine container and ping between them to check network connectivity.

$ docker network create --driver bridge alpine-net
962f373dd1cc9b9d532287b898e56d51fe1e5cf09fe90208ccbf34e51ea4511c

#devops #docker #docker bridge network #docker network

A beginner’s guide to networking in Docker

In this lesson, we are going to understand how host-to-container and container-to-container communication takes place. Since this won’t be an advanced guide, we are only going to explore the surface of networking in Docker.

In the previous lessons, we learned a great deal about Docker, Dockerfile, Docker images, and Docker containers. We understood the isolated nature of a Docker container and how to connect with a running container using -p (_or __--publish_) flag to map a host port to a container port for network access or -v (_or __--volume_) flag to access files of a container from the host.

In this lesson, we are going to talk about the networking aspect of the containerization process. We will explore what different options Docker gives us to control the network of a Docker container and how we can use them depending on our needs.

A Docker network is a medium through which a Docker container can talk to its host, other containers on the host, or any other machines on or outside the host’s network. To configure networks, we use the $ docker network command that provides us subcommands such as ls, create, attach to configure networks and containers’ relationship to them.

When you install Docker for the first time, we get three types of networks out of the box. You can use the $ docker network ls command to see them.

#containers #docker-networking #networking #docker #programming

Docker Networking: Introduction to Implementation of Docker Networks

Most of us are aware that **Docker container**s and services can connect and other non-Docker workloads. It is called Docker Networking, and as far as this networking is concerned, Docker containers and services need not know that they are deployed on Docker or whether the peers they are connected to are Docker workloads or not. This article will discuss more on the connection between containers and services. Let us begin with the topics that are going to be covered in this article.

• What is Docker Networking?
• And, what is a Container Network Model (CNM)?
• What are various Network Drivers in it?
• Bridge Network Driver
• None Network Driver
• Host Network Driver
• Overlay Network Driver
• Macvlan Network Driver
• Basic Networking with Docker
• docker network ls command
• Inspect a Docker network – docker network inspect
• docker network create
• How to connect the docker container to the network?
• How to use host networking in docker?
• Docker Compose Network
• Updating containers in the Docker Compose network
• Docker Compose Default Networking

What is Docker Networking?

It can be defined as a communication package that allows isolated Docker containers to communicate with one another to perform required actions or tasks.

A Docker Network typically has features or goals shown below:

• Flexibility – It provides flexibility for various applications on different platforms to communicate with each other.
• Cross-Platform – We can use Docker Swarm clusters and use Docker in cross-platform that works across various servers.
• Scalability – Being a fully distributed network, applications can scale and grow individually while also ensuring performance.
• Decentralized – Docker network is decentralized. Hence it enables the applications to be highly available and spread. So in case any container or host is missing from the pool of resources, we can pass over its services to the other resources available or bring in a new resource.
• User – Friendly – Deployment of services is easier.
• Support – Docker offers out-of-the-box support, and its functionality is easy and straightforward, making docker networks easy to use.

#docker #docker networks

Docker Networking: Workflow, Networking Basics, Networking Commands

Introduction

In this age of virtualization, network administrators no longer work only on traditional networking components such as routers, LAN/ WAN components and switches. They have to work on network components on virtualization platforms. The whole IT industry is interested in the concept of containerization, where strong networking skills are essential.

As Docker is one of the most used containerization software, Docker networking skills are important for configuring a container. At present, more than 12,000 companies use Docker containers for shipping their applications. These companies include JPMorgan Chase, ThoughtWorks and Neudesic.

In this article, we will learn about the introduction to Docker, the basics of Docker networking.

Let us first understand the fundamentals of Docker.

#docker networking #docker