Create directory for Dockerfile
Create Docker file, Name should be Dockerfile
#Start with an #Ubuntu base image
FROM ubuntu
#Add metadata with a Name Label
LABEL Name="Dinesh"
#Update packages and Install Apache2
RUN apt-get update && apt-get install apache2 -y
vi Dockerfile
Build the Docker Image :
docker build -t myimage:v1.0 .
docker build
: Invokes Docker's build process.-t myimage:v1.0
: Tags the resulting image with the namemyimage
and versionv1.0
..
: Uses the current directory as the build context, meaning it looks for a Dockerfile in the current directory to build the image.
Verify the Image Creation :
docker images
Now, i need to install vim & git in inside docker image.
We have two option, one for build new image with new Dockerfile. Another one, build new image from existing image myimage:v1.0
, Now, i will create new image from existing image.
Need add image name in FROM
existing Docker image with tag & Which things need to install (like, vim,git) add in RUN
line
vi Dockerfile
Now, Build the new Docker Image > Need to change Image name
or Tag
for new image.
I have changed tag v2.0
docker build -t myimage:v2.0 .
Verify the Image Creation :
docker images
Launching a Docker Container using Docker Image:
Already, we have created two images, i will use this docker image myimage:v2.0
for launch docker container
Step 1 : Verify the Available Docker Images
docker images
Step 2: Launching a Docker Container
docker run -itd -p "8080:80" myimage:v2.0
docker run
: Runs a new container from a specified image.-it
: Runs the container in interactive mode with a terminal (though the-d
flag will detach it, so-it
is not necessary here).-d
: Runs the container in detached mode (in the background).-p "8080:80"
: Maps port 80 inside the container to port 8080 on the host machine.myimage:v2.0
: Specifies the image to use for the container, with the tagv2.0
.
Step 3: Verify the Running Container
docker ps