Created timestamp is wrong for newly built docker image

Environment:

• Jib version: 1.8.0
• Build tool: Apache Maven 3.6.0
• OS: Ubuntu 18.04.3 LTS

Description of the issue: When I build a docker image for spring boot application using jib maven plugin, the creation date says 50 years ago which is really strange

springbootjib latest 008a4f225d1d 50 years ago 141MB

Expected behavior:

Expected behavior: The created date should reflect the latest time when it was created

Steps to reproduce:

1. Generate a demo spring boot app using an initializer
2. Add the below content to pom.xml under plugins section
3. Run the command mvn compile jib:dockerBuild to generate docker image.

jib-maven-plugin Configuration:

<plugins>
    <plugin>
    <groupId>com.google.cloud.tools</groupId>
    <artifactId>jib-maven-plugin</artifactId>
        <version>1.8.0</version>
	<configuration>
            	<to>
               		<image>springbootjib</image>
            	</to>
        </configuration>
    </plugin>
</plugins>

jib-gradle-plugin Configuration:

PASTE YOUR build.gradle CONFIGURATION HERE

Log output:

[INFO]
[INFO] Containerizing application to Docker daemon as springbootjib...
[WARNING] Base image 'gcr.io/distroless/java:8' does not use a specific image digest - build may not be reproducible
[INFO] Using base image with digest: sha256:65d23224482a20dedb62c94d258706f3949c02bd0522a97fee08d17ab38f1813
[INFO]
[INFO] Container entrypoint set to [java, -cp, /app/resources:/app/classes:/app/libs/*, com.example.demo.DemoApplication]
[INFO]
[INFO] Built image to Docker daemon as springbootjib
[INFO] Executing tasks:
[INFO] [==============================] 100.0% complete
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  24.565 s
[INFO] Finished at: 2020-01-28T14:01:21Z
[INFO] ------------------------------------------------------------------------

Additional Information:

As can be seen from the above output, the image was created on Finished at: 2020-01-28T14:01:21Z but the docker timestamp is different

springbootjib                                                    latest              008a4f225d1d        50 years ago        141MB

[loosebazooka]

@ppiotrow are you asking how to set the created when doing docker build?

[chanseokoh]

Just FYI, the created timestamp is a relatively minor issue concerning reproducibility, because it only affects a small metadata JSON. A much bigger problem is that you can’t build image layers reproducibility because of changing file timestamps. Therefore, I guess it is far more important to change modification time of actual files on your file system when you use the Docker API.