Get 500 error building image from Dockerfile, internally reports "not a valid repository/tag"

[davidmichaelkarr]

I have a very simple Dockerfile, along with a very simple POM. I'm using a private enterprise registry.

The Dockerfile (in "src/docker") is just the following:
FROM tomee:8-jdk-7.0.0-webprofile
(Obviously, more will be added when I work through infrastructure issues.)

The POM is just this:
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>orderProcessingDashboard</groupId> <artifactId>ordersImage</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>pom</packaging> <build> <plugins> <plugin> <groupId>com.spotify</groupId> <artifactId>docker-maven-plugin</artifactId> <configuration> <registryUrl>http://<host>:5000</registryUrl> <dockerDirectory>src/docker</dockerDirectory> <imageName>ordersImage</imageName> </configuration> </plugin> </plugins> </build> </project>

When I run "mvn docker:build", I get this:

[ERROR] Failed to execute goal com.spotify:docker-maven-plugin:0.4.11:build (default-cli) on project ordersImage: Exception caught: Request error: POST unix://localhost:80/build?t=ordersImage: 500: HTTP 500 Internal Server Error -> [Help 1]

I then looked at /var/log/messages and found this line:

Aug 10 17:36:21 dockerd: time="2016-08-10T17:36:21.395888585-04:00" level=error msg="Handler for POST /build returned error: Error parsing reference: "ordersImage" is not a valid repository/tag"

It's definitely a problem that the Maven build didn't report the full error message. I don't know whether that's a problem with docker or the plugin. The bigger problem is understanding why it thinks the name I'm trying to create the image with is invalid.

[mattnworb]

Hey @davidmichaelkarr thanks for the report. It is an issue within the plugin - I don't think it passes on the response body of the error response from Docker. I believe this is already captured in #119 so I will close this issue.

[davidmichaelkarr]

Well, thanks, but it was pretty obvious to me that it wasn't passing on the response body. That should obviously be fixed, but that's not why I created this issue. My problem is WHY is it saying that "ordersImage" is an invalid image name? It says "is not a valid repository/tag". Even in your own docs you have a sample that uses an imageName value of "example". I'm fairly certain that if I set my imageName to "example" I would get a similar error.