CODEWITHSUNDEEP
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noobuntu
noobuntu

Reputation: 913

Dockerfile Automated Build from Github- Tag not found

I am new to Docker and am trying to set up an automatic build of my Github Repo:

https://github.com/satishsa1107/perl_helloworld

I added a Dockerfile with the following code:

FROM satishsa1107/perl_helloworld:latest
CMD perl hello.pl

My DockerHub is setup here:

docker.io/satishsa1107/perl_helloworld

When I try to build it, I get the following error:

Sending build context to Docker daemon 58.37 kB Sending build context to Docker daemon 58.37 kB
Step 1 : FROM satishsa1107/perl_helloworld:latest
Pulling repository docker.io/satishsa1107/perl_helloworld
Tag latest not found in repository docker.io/satishsa1107/perl_helloworld
ERROR: Build process returned exit code 1
ERROR: Build in 'master' (ef8abd92) failed in 0:00:16

I don't get it because when I set up my build settings in DockerHub, I added the following settings:

Type     Name       Dockerfile Location    Docker Tag Name
branch   master     /                      latest

I assumed this meant that it was tagging my master branch in my Github Repo as latest, and I could refer to it as satishsa1107/perl_helloworld:latest but doesn't seem to be working.

Also, in DockerHub I see tags as empty. What am I doing wrong?

Upvotes: 0

Views: 1119

Answers (1)

Felipe Plets
Felipe Plets

Reputation: 7510

The FROM statement is always the base image you want to use to compile your own image, so in this case Docker is looking for the image docker.io/satishsa1107/perl_helloworld:latest in order to compile your image, so it won't work.

I recommend you to read more about the Dockerfile here: https://docs.docker.com/engine/reference/builder/

A possible option for your FROM command is to reference the standard Perl as stated here: https://hub.docker.com/_/perl/

The Dockerfile would look like:

FROM perl:5.20
COPY . /usr/src/myapp
WORKDIR /usr/src/myapp
CMD [ "perl", "./hello.pl" ]

Upvotes: 2

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