I keep getting the "docker build" requires exactly 1 argument(s) error

Question

First of, I am trying to follow along with this guide.

So far I have the host up and running, but I am stuck at this one point. I've installed the windowsservercore image, and I installed the IIS image and tagged it 'windowsserveriis'. Now I need to install ASP.NET 4.5, and I use the following command

docker build –t windowsserveriisaspnet .

I should maybe add that I create a folder for my Docker images. So I have a C:\dev\TestProject\DockerImages and the a folder for each Dockerfile. Now, I am a bit unsure about this, as the guide never mentions how to actually create the files, so I thought I would divide them up just to be safe (and also be able to have them be named just 'Dockerfile' to avoid confusion).

Anyways, the above command prints out the following error message:

docker : "docker build" requires exactly 1 argument(s).

At line:1 char:1

docker build –t windowsserveriisaspnet .

My Dockerfile looks like this:

FROM windowsserveriis

RUN dism /online /enable-feature /featurename:IIS-ASPNET45

My initial thought was that i forgot the dot at the end, but that is not the case. I also tried replacing the dot with '--file="DockerfileASPNET"' (where I renamed the file). However nothing seems to work.

So, what am I missing? Thanks in advance..

Solution 1

Turns out there was some hidden formatting in my command. If I wrote it out manually, instead of copy/pasting, it worked. So I guess the lesson learned here is; check your copying.

Solution 2

I was facing the same issue. I missed the little period ( . ) at the end of the command. I copy pasted the command from official docker docs. The period ( . ) at the end of the command tells Docker to use the shell’s current working directory as the build context. Be sure include the period (.) at the end of the command, and be sure to run the command from the current working directory that contains the Dockerfile and application code.

Solution 3

Docker build requires docker file.

Note: you must provide URL or path where you store your built docker image file. You missed providing the URL or path

SYNTAX: docker image build OPTIONS <url or path>

Solution commands (in 2 ways)

1. docker image build -f <dockerfile> <url or path>
2. docker build -f <dockerfile> <url or path>

Eg, docker build --file ./Dockerfile.txt .

Solution 4

I have also faced the same issue when I copy pasted the given command. However, it worked when I typed the same command given below.

$ docker image build -t python-hello-world .

Solution 5

If .Dockerfile is in your current directory use:

docker build –t windowsserveriisaspnet -f ./.Dockerfile .

So you point to the specific file -f ./.Dockerfile and need to point to local folder using . (dot at the end).

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Comments

[Dani]

stackoverflow.com/questions/28996907/…

[Dani]

There are more answers. Also, you should google it, and if you tried that question, you should mention it. It will save everyone time, as you can now tell.

[Mike Garuccio]

@alldani He already has the . in his code so that answer is not relevant. @kasper where are you running the command from? are you inside the folder you created to house the Dockerfile? Also make sure your Dockerfile is named Dockerfile with correct capitalization

[kolexinfos]

After trying everything, the only thing that worked for me in Powershell was typing it out

[spencer.sm]

And don't forget to include the period (.) at the end ;)

[Luciano Ghilarducci]

NUB mistake! LOL! (I did the same!)

[agileDev]

Yes but it's not only (.) at the end but a space and (.) at the end worked for me.