MariaRiosNavarro / first_docker

first docker

npm init -y

in package.json: "type": "module"

docker Cheatsheet

docker pull <imagename> //loads the image from the docker hub

docker run <imagename> // creates a container from an image, if the image is not available locally docker tries to load it from the hub

docker image ls // lists the existing image files

docker container ls // lists all running containers

docker container ls -a // also lists all terminated containers

docker start <containername | containerid> // start the container

docker container stop <containername > // stop the container

docker rm <containername | containerid> // remove container

Create a Image

1.- Create a Dockerfile

# we use the node image (with ubuntu:alpine) as basis image

FROM node:alpine

# create a folder for the project

RUN mkdir firstdocker

# go to the new folder

WORKDIR /firstdocker

# we copy all ours data in our image

COPY . .

# we create the necessary files

RUN npm i

# We give the PORT number

EXPOSE 9000

# We define the comands to start the container as Array

CMD ["node", "app.js"]

BUILD IMAGE

docker build .

docker image ls

docker run --name firstdocker_01 -d -p 8080:9000 1599a7e57c93

(with the id run the image in backdround (-d) and give a new port for 9000-> here 8080)

docker container ls

check the container list & test the container

Exercise: Create 1 img & 3 container from the same image with dif. Ports and stop it and delete one container. Start the remaining containers again

All the process:

create the image

docker build .
docker image ls

create the 3 containers

docker run --name firstdocker_1 -d -p 8081:9000 c98ca0ab7f53
docker run --name firstdocker_2 -d -p 8082:9000 c98ca0ab7f53
docker run --name firstdocker_3 -d -p 8083:9000 c98ca0ab7f53

check all containers

docker container ls

stop 2 containers

docker container stop firstdocker_2 firstdocker_3

check all containers

docker container ls -a

remove one container ( delete )

docker rm firstdocker_3

last check

docker container ls -a

INFO remove Container & Images

Stop in docker desktop