docker build with Dockerfile, but the image has no name or tag

Question

I installed Docker desktop for mac. The version is 1.12.0-rc4-beta19

when I use docker build -t self/centos:java8 .

the image has no name or tag

REPOSITORY          TAG                 IMAGE ID            CREATED             SIZE
<none>              <none>              1581ffcbfd7f        5 minutes ago       196.8 MB

What is wrong with the build command?

Solution 1

is your image building correctly? the name does not get set when there is an error in the build. This because every step in the build is a new image created and with an error you won't get to the last step with the correctly named image

btw you can set it manually with the tag command https://docs.docker.com/engine/reference/commandline/tag/

Solution 2

Tag an image referenced by ID To tag a local image with ID “0e5574283393” into the “fedora” repository with “version1.0”:

docker tag 0e5574283393 ExampleApps/myapp:version1.0

Comments

[viewking]

thanks, You are right !The error happened, there is a connection refused

[Vishrant]

how to know if there is an error while building up? for me it is showing Successfully built but shows <none>:<none>

[Darius]

@Vishrant, in general you can see the build output (and don't use -q or --quiet).

[Shashank Srivastava]

I am getting a successfull built and if i immediately run docker run command i see the name but some how after sometime the name is getting set to none. can someone please help?

[joe]

This solved my problem. If your build ends in something like Running in e3e4cc0a2264 then it means that your docker image hasn't finished building because there's a command that is "hanging" (in my case a python script that hadn't finished).