Gain insights into Docker fundamentals, delve into advanced concepts like database connectivity and Docker Compose, and discover how to monitor and scale services with Docker Swarm.

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Exercise

Exercise 2

exercise 3

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Bonus Section - Flask

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Whether you are a DevOps beginner or just a developer who wants to start working with containers, you’re in the right place. Docker is an in-demand technology that you will be exposed to frequently while on the job.

 

Docker is used for setting up, deploying, and running applications, at scale, by containerizing them. More on that later. Docker also provides developers with a consistent environment for product development, and along with Kubernetes, makes managing the development lifecycle a breeze.

 

In this course, you will learn the fundamentals of Docker such as containers, images, and commands. You’ll then progress to more advanced concepts like connecting to a database container and how to simplify workflows with Docker Compose. At the end, you’ll learn how to monitor clusters and scale Docker services with Swarm.

Working with Containers: Docker & Docker Compose

In this lesson, we will create a table of all the commands we have used in this section. This will provide a faster reference to the commands. Let's create a table of commands then below.

|   Command  | Options    |  Explanation   |
| --- | --- | --- |
|  `docker swarm init`   |     |  *Makes the current machine a swarm node*   |
|  `docker swarm leave`   |   `-f`  | *Removes the current node from a swarm cluster. The `-f` is used to force a manager node to leave a swarm cluster*    |
|   `docker service create <image name>` |  `-p`, `--env_file`, `--name`, `mount`  |  *Creates a service from an image. `-p` is used to map a host port to a service's tasks ports.*   |
|    `docker network create <name>` |  `--driver`   | *Creates a new network. `--driver` specifies which driver to use for the network*    |
|    `docker service update [Options] <service ID>` |  `--network-add`   | *Updates existing service. You can attach a new network using the `--network-add` option.*    |
|    `docker service [Command] --help` |     | *A quick documentation of every command*    |
|    `docker service ls` |     |  *Lists all the services running on the current node*   |
|    `docker service scale <service Id>=<replica number>` |     |  *Scales services up and down using the replica numbers*   |
|   `docker stack deploy <stack name>`  |  `--compose-file`   |  *Deploys a new stack of services using a compose file. `--compose-file` specifies the compose-file to be used.*   |
|    `docker stack ls` |     |  *Provides information about the current stack*   |
|   `docker stack ps <stack_name>`  |     |  *Lists all the tasks or containers of a stack*   |
|  `docker stack services <stack name>`   |     |  *Lists all the services in the stack*   |
|  `docker stack rm <stack name>`   |     |  *Removes specified stack from swarm*   |
|   ``  |     |     |

Frequently-used Docker swarm commands in one place.

Docker Swarm Commands Cheat Sheet

Introduction to Course

Why Docker?

Getting Started With Docker

Docker Fundamentals

Automation using Dockerfile

Advance Docker

Introduction to Docker-Compose

Exposure to Docker Swarm

Bonus Section

Docker Swarm Commands Cheat Sheet