CODEWITHSUNDEEP
mavendocker
user3552178
user3552178

Reputation: 2971

Maven: No plugin found for prefix 'dockerfile'

followed some maven docker examples, came up with following code, run mvn package dockerfile:build but get these errors: [ERROR] No plugin found for prefix 'dockerfile' in the current project and in the plugin groups [org.apache.maven.plugins, org.codehaus.mojo] available from the repositories ...

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<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/maven-v4_0_0.xsd">

    <modelVersion>4.0.0</modelVersion>
    <groupId>com.mycompnay.learning</groupId>
    <artifactId>my-app-base-pom</artifactId>
    <version>0.0.1</version>


    <properties>
        <dockerfile.version>0.0.1</dockerfile.version>
        <docker.image.prefix>AdminService</docker.image.prefix>
    </properties>

    <build>
        <plugins>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>dockerfile-maven-plugin</artifactId>
                <version>0.0.1</version>
                <executions>
                    <execution>
                        <id>default</id>
                        <goals>
                            <goal>build</goal>
                        </goals>
                        <configuration>
                            <repository>docker.io/kkapelon/docker-maven-comparsion</repository>
                            <tag>projectVersion</tag>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

Where should i go from here pls ?

Upvotes: 3

Views: 4410

Answers (1)

b0gusb
b0gusb

Reputation: 4721

You most probably get the error because the plugin (which is version 0.0.1) is missing. Check for any maven warnings 

[WARNING] The POM for com.spotify:dockerfile-maven-plugin:jar:0.0.1 is missing, no dependency information available
[WARNING] Failed to retrieve plugin descriptor for ...

Because it fails to retrieve the plugin descriptor, maven does not know there is a dockerfile prefix configuration associated with the plugin and hence the error "No plugin found for prefix" comes up. This configuration is stored in the plugin's path on the maven repository

The conventional artifact ID formats to use are:

  • maven-${prefix}-plugin - for official plugins maintained by the Apache Maven team itself (you must not use this naming pattern for your plugin, see this note for more informations)
  • ${prefix}-maven-plugin for plugins from other sources.

If your plugin's artifactId fits this pattern, Maven will automatically map your plugin to the correct prefix in the metadata stored within your plugin's groupId path on the repository.

More about plugin prefix resolution here

For version 1.4.0, for example, the descriptor (i.e. pom file) has a configuration section:

<configuration>
    <goalPrefix>dockerfile</goalPrefix>
    <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound> 
</configuration>

Changing the version to something more recent (>1.2.0) should fix the error.

        <plugin>
            <groupId>com.spotify</groupId>
            <artifactId>dockerfile-maven-plugin</artifactId>
            <version>1.4.0</version>
            ...
        </plugin>

Run with:

mvn package dockerfile:build

Upvotes: 3

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