pablovilla83 / do-cdmx-nginx

Simple docker container running an nginx server

Instructions for the Docker from scratch workshop

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Basic Docker Commands:

• docker run
• docker start <name|id>
• docker stop <name|id>
• docker ps [-a include stopped containers]
• docker rm <name|id>

Connect to the droplet

ssh root@[hostname]

Login to your Docker account

docker login

Check that the installation is working with the official hello-world container

docker run hello-world

Run a web-based hello world

docker run tutum/hello-world

To expose the container to the world

docker run -p 80:80 tutum/hello-world

At this point if you run 'docker ps -a' you will see 3 or more containers, which are either stopped or running. To get rid of them we execute:

docker rm [containerId]

You can specify only the start of the containerId and this command will work. I.e. ('docker rm e8' for container with Id of e8f1c0192dd8)

Let's create a couple of containers now

docker run -d --name app1 -p 80:80 tutum/hello-world
docker run -d --name app2 -p 81:80 tutum/hello-world
docker run -d --name app3 -p 82:80 tutum/hello-world

The -d flag runs the container on the background The --name is self-explanatory

We can now run commands using the container's name

docker stop app1
docker start app1

To stop all containers at once we can use this command

docker stop $(docker ps -a -q)

The -a lists all containers, and the -q lists only their id's

Let's now run an nginx server

docker run -d -p 80:80 nginx

Let's get inside our new container using bash

docker exec -i -t [containerId] /bin/bash

The html folder is located at '/usr/share/nginx/html'

To create our first image/container follow these steps on your local machine

Position your terminal on the root of this project, then run

docker build -t [username]/[imageName] .

The . is because we are pulling from this projects root

Then we can run our new instance by doing

docker run -d -p 80:80 [username]/[imageName]

At this point, you want to create a new repository in your DockerHub account Once you've done that, you can push to that repo

docker push pablovilla83/do-cdmx-nginx

Your repo might show that there hasn't been any push. This is an open bug. docker/hub-feedback#301 If you got a digest as confirmation of your push, your up and ready to go.

#Switch back to your digital ocean droplet

docker run -d -p 80:80 [username]/[imageName]