When you search for a docker image on Docker hub , there will be 2 tabs- Repo Info and Tags . Open Tags tab and you will see the sizes of all the types of images you can pull for that image
@mmumshad I’m getting the below error when I try to build dockerfile using tag webapp-color.
$ docker build . -t webapp-color
Sending build context to Docker daemon 121.3kB
Step 1/6 : FROM python:3.6
—> f3411dca4721
Step 2/6 : RUN pip install flask
—> Running in 38c5fec65ebb
ERROR: Could not find a version that satisfies the requirement flask (from versions: none)
ERROR: No matching distribution found for flask
The command ‘/bin/sh -c pip install flask’ returned a non-zero code: 1
Kindly check the following:
The issue is the symbolic link is not created, either you can create symbolic link or else move to the directory webapp-color and execute the command.
I assume you are in the root directory, run this command to find your directory “PWD”
if it says /root, then
$cd webapp-color
$docker build -t webapp-color .
That should work without any issues.
Cheers, all the best…
check for these
git clone GitHub - mmumshad/simple-webapp-flask: Simple Flask based web application
cd simple-webapp-flask/
docker build -t webapp-color .
docker pull python:3.6-slim
1 Like
What is the answer of question 14 at the labs Docker images…
Question is this?
Build a new smaller docker image by modifying the same Dockerfile and name it webapp-color and tag it lite .
Hint: Find a smaller base image for python:3.6 . Make sure the final image is less than 150MB .
Check the steps in the attached gif https://kodekloud.com/community/uploads/db1265/original/2X/a/a32666104d5fedb43dc88a613da18f7e20927c80.gif
docker build -t webapp-color /root/webapp-color/
This worked for me
-
--tag,-tName and optionally a tag in the ‘name:tag’ format
/root/webapp-color/ is the path
Hi Support Team @Ayman @Tej-Singh-Rana
Can you help me to solve below. I have ran docker container in detach mode but not able to see it as running
$ docker run --name python_1test -d python:3.6
f845ed5c2e6a6c6670ceba9ca938701662195dc1472caa676f6ce3f426a2ba52
$ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
4ec46df02651 webapp-color “python app.py” 12 minutes ago Up 11 minutes 8080/tcp webapp_test
Also I cannot able to build image by specifying dockerfile path explicitly.
$ sudo docker build --file=“/root/webapp-color/Dockerfile” -t webapp-color
“docker build” requires exactly 1 argument.
See ‘docker build --help’.
Usage: docker build [OPTIONS] PATH | URL | -
Build an image from a Dockerfile
1 Like
Simply go to that directory and run the below command: -
sudo docker build -t webapp-color .
Make sure to use the dot (.) symbol at the end of the command.
Regards,
@tejaswinidp96 thanks for responding. I was trying in otherway to explicitly referring dockerfile using --file option.
Not sure if it is right way to build image other than running it from current directory
Hey @Manikumar-Kandukuri ,
I see what is happening here. If I understand it correctly you want the context from another directory, in which case you should proceed with something like:
$ sudo docker build -t webapp-color /root/webapp-color/
I think you have confused build context with the Dockerfile name.
--file : Used when you have multiple Dockerfiles and you want to specify which one to use when building the docker image.
Context: This is the directory from where docker will fetch these Dockerfiles.
Attaching one screenshot for a more clear picture.
Hope it helps. Let me know if you have other queries as well.
Regards,
Thanks a lot @Dinesh_Kodekloud . works perfectly.
Thanks @Tej-Singh-Rana for sharing me documentation
Glad, it helped you.
Happy Learning!!
Step 1: Find slim version of img - pull python:3.6-slim
Step2: edit dockerfile using vim cmd (save changes by pressing esc then :w)
Step 3: docker build -f Dockerfile -t webapp-color:lite .