Kubernetes project folder is missing app.jar leading to docker build failure about devops-master-class

[Amitabh1989]

To over come this issue, you need to build the JAR file.

To build the JAR file :

mvn clean install

And this worked fine.

Logs Snippet of the completion of build:

Downloaded from central: https://repo.maven.apache.org/maven2/org/apache/maven/shared/maven-shared-utils/0.4/maven-shared-utils-0.4.jar (155 kB at 3.0 MB/s)
Downloaded from central: https://repo.maven.apache.org/maven2/commons-codec/commons-codec/1.6/commons-codec-1.6.jar (233 kB at 3.9 MB/s)
Downloaded from central: https://repo.maven.apache.org/maven2/org/codehaus/plexus/plexus-utils/3.0.15/plexus-utils-3.0.15.jar (239 kB at 3.2 MB/s)
[INFO] Installing C:\GitHub\devops-master-class\kubernetes\01-hello-world-rest-api\target\hello-world-rest-api.jar to C:\Users\amita\.m2\repository\com\in28minutes\rest\webservices\01-hello-world-rest-api\0.0.4-SNAPSHOT\01-hello-world-rest-api-0.0.4-SNAPSHOT.jar
[INFO] Installing C:\GitHub\devops-master-class\kubernetes\01-hello-world-rest-api\pom.xml to C:\Users\amita\.m2\repository\com\in28minutes\rest\webservices\01-hello-world-rest-api\0.0.4-SNAPSHOT\01-hello-world-rest-api-0.0.4-SNAPSHOT.pom
[INFO] Installing C:\GitHub\devops-master-class\kubernetes\01-hello-world-rest-api\target\hello-world-rest-api-docker-info.jar to C:\Users\amita\.m2\repository\com\in28minutes\rest\webservices\01-hello-world-rest-api\0.0.4-SNAPSHOT\01-hello-world-rest-api-0.0.4-SNAPSHOT-docker-info.jar
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  02:59 min
[INFO] Finished at: 2023-05-13T09:01:23+05:30
[INFO] ------------------------------------------------------------------------

And now when I build the docker image, it works fine.

PS C:\GitHub\devops-master-class\kubernetes\01-hello-world-rest-api> docker build -t ainebula/hello-worlds-rest-api:0.0.1.RELEASE . [+] Building 0.1s (7/7) FINISHED => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 163B 0.0s => [internal] load metadata for docker.io/library/openjdk:8-jdk-alpine 0.0s => [internal] load build context 0.0s => => transferring context: 144B 0.0s => [1/2] FROM docker.io/library/openjdk:8-jdk-alpine 0.0s => CACHED [2/2] ADD target/*.jar app.jar 0.0s => exporting to image 0.0s => => exporting layers 0.0s => => writing image sha256:a8730bd740ef8bafd18a68c4f6bdb3a8d1835165e81a22ce5382123c7389282f 0.0s => => naming to docker.io/ainebula/hello-worlds-rest-api:0.0.1.RELEASE 0.0s PS C:\GitHub\devops-master-class\kubernetes\01-hello-world-rest-api> docker push hello-world-rest-api:0.0.1.RELEASE The push refers to repository [docker.io/library/hello-world-rest-api] An image does not exist locally with the tag: hello-world-rest-api PS C:\GitHub\devops-master-class\kubernetes\01-hello-world-rest-api> docker build -t ainebula/hello-world-rest-api:0.0.1.RELEASE . [+] Building 0.1s (7/7) FINISHED => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 163B 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => [internal] load metadata for docker.io/library/openjdk:8-jdk-alpine 0.0s => [internal] load build context 0.0s => => transferring context: 144B 0.0s => [1/2] FROM docker.io/library/openjdk:8-jdk-alpine 0.0s => CACHED [2/2] ADD target/*.jar app.jar 0.0s => exporting to image 0.0s => => exporting layers 0.0s => => writing image sha256:990680fb8bc62b74026a05f4272d2c7ac285d41c836441f373c228aeb4506867 0.0s => => naming to docker.io/ainebula/hello-world-rest-api:0.0.1.RELEASE 0.0s PS C:\GitHub\devops-master-class\kubernetes\01-hello-world-rest-api> docker push ainebula/hello-world-rest-api:0.0.1.RELEASE The push refers to repository [docker.io/ainebula/hello-world-rest-api] cecff4b3d98b: Pushed ceaf9e1ebef5: Mounted from ainebula/currency-conversion 9b9b7f3d56a0: Mounted from ainebula/currency-conversion f1b5933fe4b5: Mounted from ainebula/currency-conversion 0.0.1.RELEASE: digest: sha256:f3d231e328098acde8d2a08229dda028565fdd75edc2064db4443fb2c01da95f size: 1159