Springboot-container

How the code base generated?

1. Go to https://start.spring.io/

2. Generate the sample app with the following attributes

Left hand side:

• Project: Gradle - Groovy
• Language: Java
• Spring Boot: 2.7.14
• Packaging: Jar
• Java: 11
• Others, just leave it untouched.

Right hand side:

• Dependencies: Spring Web

3. Click GENERATE

4. Extract the zip file to folder src

5. If you would like to change SpringBoot version, edit the file build.gradle and replace 2.7.14 with 2.7.8 (for example)

Folder structure

.
├── .gitignore
├── build.gradle
├── gradle/
│   └── wrapper/
│       ├── gradle-wrapper.jar
│       └── gradle-wrapper.properties
├── gradlew*
├── gradlew.bat
├── settings.gradle
└── src/
    ├── main/
    │   ├── java/
    │   │   └── com/
    │   │       └── example/
    │   │           └── springboot/
    │   │               └── Application.java
    │   └── resources/
    │       ├── application.properties
    │       ├── static/
    │       └── templates/
    └── test/
        └── java/
            └── com/
                └── example/
                    └── springboot/
                        └── ApplicationTests.java

How to build container image?

$ ./build.sh

How to run the container image?

$ docker run -it guessi/springboot-container # or guessi/springboot-container:alpine

Results

Run locally, regular build

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.7.8)

2023-08-18 16:37:55.207  INFO 83 --- [           main] com.example.springboot.Application       : Starting Application using Java 11.0.16 on 0f7370c668aa with PID 83 (/opt/workdir/app.jar started by root in /opt/workdir)
2023-08-18 16:37:55.211  INFO 83 --- [           main] com.example.springboot.Application       : No active profile set, falling back to 1 default profile: "default"
2023-08-18 16:37:56.779  INFO 83 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2023-08-18 16:37:56.801  INFO 83 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2023-08-18 16:37:56.803  INFO 83 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.71]
2023-08-18 16:37:56.949  INFO 83 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2023-08-18 16:37:56.953  INFO 83 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 1610 ms
2023-08-18 16:37:57.485  INFO 83 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2023-08-18 16:37:57.500  INFO 83 --- [           main] com.example.springboot.Application       : Started Application in 3.182 seconds (JVM running for 3.793)

Run under Kubernetes

 % k logs -f springboot-6574df8454-lhhdz

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/
 :: Spring Boot ::                (v2.7.8)

2023-08-18 16:33:43.638  INFO 1 --- [           main] com.example.springboot.Application       : Starting Application using Java 11.0.16 on springboot-6574df8454-lhhdz with PID 1 (/opt/workdir/app.jar started by root in /opt/workdir)
2023-08-18 16:33:43.643  INFO 1 --- [           main] com.example.springboot.Application       : No active profile set, falling back to 1 default profile: "default"
2023-08-18 16:33:46.010  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2023-08-18 16:33:46.027  INFO 1 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2023-08-18 16:33:46.028  INFO 1 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet engine: [Apache Tomcat/9.0.71]
2023-08-18 16:33:46.194  INFO 1 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
2023-08-18 16:33:46.194  INFO 1 --- [           main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 2416 ms
2023-08-18 16:33:47.167  INFO 1 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2023-08-18 16:33:47.182  INFO 1 --- [           main] com.example.springboot.Application       : Started Application in 4.598 seconds (JVM running for 5.445)

LICENSE

UNLICENSE