https://buildpacks.io/
Until cloud platforms such as Heroku and Pivotal Cloud Foundry incorporate the Buildpack v3 Lifecycle, the fastest way to try Cloud Native Buildpacks is via the pack CLI, which integrates with your local Docker daemon. Here is an example below taking Pivotal MySQLWeb application and creating an OCI compliant image from that
Pre Steps:
1. Install pack using this link
https://buildpacks.io/docs/install-pack/
2. Ensure you have Docker CE installed if not use this link
https://hub.docker.com/search/?type=edition&offering=community
Steps:
1. I am using Pivotal MySQLWeb which i have packaged using maven and then taken the JAR and exploded it onto the file system to avoid compilation. You can still just use source code and the Cloud Native Buildpack's will still work but in this example I avoid the maven compilation step by using an exploded JAR file already compiled which is what a Build Service on a cloud platform would do in any case
Let's start by using "pack" to create our image as per below
papicella@papicella:~/pivotal/PCF/APJ/PPTX/CNCF/buildpacks.io/demos$ pack build pivotal-mysql-web --path ./PivotalMySQLWeb
Using default builder image cloudfoundry/cnb:cflinuxfs3
Pulling image index.docker.io/cloudfoundry/cnb:cflinuxfs3
cflinuxfs3: Pulling from cloudfoundry/cnb
18d7ea8d445c: Pull complete
18d0be9dc457: Pull complete
f5407c34df38: Pull complete
35c61e03e6bf: Pull complete
40d144c93ada: Pull complete
4f4fb700ef54: Pull complete
0432ec3bb9f8: Pull complete
3731e128636c: Pull complete
1bab066bbafe: Pull complete
4cc53e89f635: Pull complete
4fd62e90f994: Pull complete
dc9fa77b2cd2: Pull complete
3cd4ed6e9bbf: Pull complete
a525f8221dc8: Pull complete
f01bc40f59c5: Pull complete
1f9842b1696d: Pull complete
3e15eeb884d5: Pull complete
3c0f59c7956f: Pull complete
c3e6214340d9: Pull complete
6955f2c8bfad: Pull complete
5112994886a0: Pull complete
e19195f86112: Pull complete
07fb5cd454f2: Pull complete
Digest: sha256:197439e9ccc699daa6431bd7154c80b3b0ce75b072792a0e93edd6779756f3bc
Status: Downloaded newer image for cloudfoundry/cnb:cflinuxfs3
Selected run image cloudfoundry/cnb-run:cflinuxfs3 from builder
Pulling image cloudfoundry/cnb-run:cflinuxfs3
cflinuxfs3: Pulling from cloudfoundry/cnb-run
0a25bf28c5eb: Pull complete
7216becd0525: Pull complete
Digest: sha256:f9605c5af04b2ba04918879f2bf9d37c55620ae28e73b94e9926cd97bbf8fe96
Status: Downloaded newer image for cloudfoundry/cnb-run:cflinuxfs3
Using build cache volume pack-cache-1f2556cf858e.build
Executing lifecycle version 0.2.1
===> DETECTING
[detector] Trying group 1 out of 4 with 8 buildpacks...
[detector] ======== Results ========
[detector] pass: Cloud Foundry OpenJDK Buildpack
[detector] skip: Cloud Foundry Build System Buildpack
[detector] pass: Cloud Foundry JVM Application Buildpack
[detector] skip: Cloud Foundry Azure Application Insights Buildpack
[detector] skip: Cloud Foundry Debug Buildpack
[detector] skip: Cloud Foundry Google Stackdriver Buildpack
[detector] skip: Cloud Foundry JMX Buildpack
[detector] skip: Cloud Foundry Procfile Buildpack
===> RESTORING
[restorer] cache '/cache': metadata not found, nothing to restore
===> ANALYZING
===> BUILDING
[builder] -----> Cloud Foundry OpenJDK Buildpack 1.0.0-M8
[builder] -----> OpenJDK JRE 11.0.3: Contributing to layer
[builder] Downloading from https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.3%2B7/OpenJDK11U-jre_x64_linux_hotspot_11.0.3_7.tar.gz
[builder] Verifying checksum
[builder] Expanding to /layers/org.cloudfoundry.openjdk/openjdk-jre
[builder] Writing JAVA_HOME to shared
[builder]
[builder] -----> Cloud Foundry JVM Application Buildpack 1.0.0-M8
[builder] -----> Main-Class Classpath: Contributing to layer
[builder] Writing CLASSPATH to launch
[builder] -----> Process types:
[builder] task: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher
[builder] web: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher
[builder]
===> EXPORTING
[exporter] Exporting layer 'app' with SHA sha256:b32618ed6b86fb496a4ce33db9df49fdd4ef16c5646b174b5643c8befcb7408a
[exporter] Exporting layer 'config' with SHA sha256:9538e967fa10f23b3415c382a3754ebf4c2645c20b6d76af519236c1181e7639
[exporter] Exporting layer 'launcher' with SHA sha256:04ca7957074763290a9abe6a067ce8c902a2ab51ed6c55102964e3f3294cdebd
[exporter] Exporting layer 'org.cloudfoundry.openjdk:openjdk-jre' with SHA sha256:e540f1464509ac673a25bd2f24c7dd6875f805c0dd35e9af84dd4669e2fd0c93
[exporter] Exporting layer 'org.cloudfoundry.jvmapplication:main-class' with SHA sha256:8537197b3f57d86a59397b89b4fbdd14900a602cc12961eae338b9ef2513cdc0
[exporter]
[exporter] *** Image: index.docker.io/library/pivotal-mysql-web:latest@8957afa91f464e2c0adc24968c31613148b9905ff1fb90ec59ff84e165d939ac
===> CACHING
[cacher] Caching layer 'org.cloudfoundry.openjdk:d2df8bc799b09c8375f79bf646747afac3d933bb1f65de71d6c78e7466ff8fe4' with SHA sha256:11439713b023be71211cb83ecd56a1be63e0c0be3e4814a18cc4c71d2264dea5
Successfully built image pivotal-mysql-web
2. Inspect the docker image on your laptop as shown below
papicella@papicella:~/pivotal/PCF/APJ/PPTX/CNCF/buildpacks.io/demos$ docker image inspect pivotal-mysql-web
[
{
"Id": "sha256:8957afa91f464e2c0adc24968c31613148b9905ff1fb90ec59ff84e165d939ac",
"RepoTags": [
"pivotal-mysql-web:latest"
],
"RepoDigests": [],
"Parent": "",
"Comment": "",
"Created": "2019-06-05T05:25:58Z",
"Container": "",
"ContainerConfig": {
...
3. Run the docker image as shown below
papicella@papicella:~/pivotal/PCF/APJ/PPTX/CNCF/buildpacks.io/demos$ docker run --rm -p 8080:8080 pivotal-mysql-web
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.1.0.RELEASE)
2019-06-05 05:30:43.005 INFO 1 --- [ main] c.p.p.m.PivotalMySqlWebApplication : Starting PivotalMySqlWebApplication on 5d21f8f32ba4 with PID 1 (/workspace/BOOT-INF/classes started by vcap in /workspace)
2019-06-05 05:30:43.009 INFO 1 --- [ main] c.p.p.m.PivotalMySqlWebApplication : No active profile set, falling back to default profiles: default
2019-06-05 05:30:44.662 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2019-06-05 05:30:44.686 INFO 1 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-06-05 05:30:44.687 INFO 1 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/9.0.12
2019-06-05 05:30:44.698 INFO 1 --- [ main] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/layers/org.cloudfoundry.openjdk/openjdk-jre/lib:/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib]
2019-06-05 05:30:44.793 INFO 1 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-06-05 05:30:44.794 INFO 1 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1736 ms
2019-06-05 05:30:45.130 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2019-06-05 05:30:45.131 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'webMvcMetricsFilter' to: [/*]
2019-06-05 05:30:45.131 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2019-06-05 05:30:45.131 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'formContentFilter' to: [/*]
2019-06-05 05:30:45.132 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2019-06-05 05:30:45.132 INFO 1 --- [ main] .s.DelegatingFilterProxyRegistrationBean : Mapping filter: 'springSecurityFilterChain' to: [/*]
2019-06-05 05:30:45.133 INFO 1 --- [ main] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpTraceFilter' to: [/*]
2019-06-05 05:30:45.134 INFO 1 --- [ main] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2019-06-05 05:30:45.436 INFO 1 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor'
2019-06-05 05:30:45.851 INFO 1 --- [ main] .s.s.UserDetailsServiceAutoConfiguration :
Using generated security password: 3823aef6-6f72-4f5f-939d-bbd3d57ec2fa
2019-06-05 05:30:45.931 INFO 1 --- [ main] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: Ant [pattern='/**'], []
2019-06-05 05:30:45.967 INFO 1 --- [ main] o.s.s.web.DefaultSecurityFilterChain : Creating filter chain: any request, [org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter@2e140e59, org.springframework.security.web.context.SecurityContextPersistenceFilter@26ae880a, org.springframework.security.web.header.HeaderWriterFilter@25a73de1, org.springframework.security.web.csrf.CsrfFilter@652ab8d9, org.springframework.security.web.authentication.logout.LogoutFilter@17814b1c, org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter@54f66455, org.springframework.security.web.authentication.ui.DefaultLoginPageGeneratingFilter@58399d82, org.springframework.security.web.authentication.ui.DefaultLogoutPageGeneratingFilter@49a71302, org.springframework.security.web.authentication.www.BasicAuthenticationFilter@4c03a37, org.springframework.security.web.savedrequest.RequestCacheAwareFilter@3c017078, org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter@298d9a05, org.springframework.security.web.authentication.AnonymousAuthenticationFilter@5cd61783, org.springframework.security.web.session.SessionManagementFilter@771db12c, org.springframework.security.web.access.ExceptionTranslationFilter@5f303ecd, org.springframework.security.web.access.intercept.FilterSecurityInterceptor@73ab3aac]
2019-06-05 05:30:46.000 INFO 1 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 9 endpoint(s) beneath base path '/actuator'
2019-06-05 05:30:46.096 INFO 1 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2019-06-05 05:30:46.101 INFO 1 --- [ main] c.p.p.m.PivotalMySqlWebApplication : Started PivotalMySqlWebApplication in 3.654 seconds (JVM running for 4.324)
4. Browse to localhost:8080 to invoke the application just to be sure it worked
5. Publish the OCI compliant image to your registry. In this example I am using Docker Hub as shown below
papicella@papicella:~/pivotal/PCF/APJ/PPTX/CNCF/buildpacks.io/demos$ pack build pasapples/pivotal-mysql-web:latest --publish --path ./PivotalMySQLWeb --no-pull
Using default builder image cloudfoundry/cnb:cflinuxfs3
Selected run image cloudfoundry/cnb-run:cflinuxfs3 from builder
Using build cache volume pack-cache-a4a78257c7be.build
Executing lifecycle version 0.2.1
===> DETECTING
[detector] Trying group 1 out of 4 with 8 buildpacks...
[detector] ======== Results ========
[detector] pass: Cloud Foundry OpenJDK Buildpack
[detector] skip: Cloud Foundry Build System Buildpack
[detector] pass: Cloud Foundry JVM Application Buildpack
[detector] skip: Cloud Foundry Azure Application Insights Buildpack
[detector] skip: Cloud Foundry Debug Buildpack
[detector] skip: Cloud Foundry Google Stackdriver Buildpack
[detector] skip: Cloud Foundry JMX Buildpack
[detector] skip: Cloud Foundry Procfile Buildpack
===> RESTORING
[restorer] cache '/cache': metadata not found, nothing to restore
===> ANALYZING
===> BUILDING
[builder] -----> Cloud Foundry OpenJDK Buildpack 1.0.0-M8
[builder] -----> OpenJDK JRE 11.0.3: Contributing to layer
[builder] Downloading from https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.3%2B7/OpenJDK11U-jre_x64_linux_hotspot_11.0.3_7.tar.gz
[builder] Verifying checksum
[builder] Expanding to /layers/org.cloudfoundry.openjdk/openjdk-jre
[builder] Writing JAVA_HOME to shared
[builder]
[builder] -----> Cloud Foundry JVM Application Buildpack 1.0.0-M8
[builder] -----> Main-Class Classpath: Contributing to layer
[builder] Writing CLASSPATH to launch
[builder] -----> Process types:
[builder] task: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher
[builder] web: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher
[builder]
===> EXPORTING
[exporter] Exporting layer 'app' with SHA sha256:b32618ed6b86fb496a4ce33db9df49fdd4ef16c5646b174b5643c8befcb7408a
[exporter] Exporting layer 'config' with SHA sha256:9538e967fa10f23b3415c382a3754ebf4c2645c20b6d76af519236c1181e7639
[exporter] Exporting layer 'launcher' with SHA sha256:04ca7957074763290a9abe6a067ce8c902a2ab51ed6c55102964e3f3294cdebd
[exporter] Exporting layer 'org.cloudfoundry.openjdk:openjdk-jre' with SHA sha256:e540f1464509ac673a25bd2f24c7dd6875f805c0dd35e9af84dd4669e2fd0c93
[exporter] Exporting layer 'org.cloudfoundry.jvmapplication:main-class' with SHA sha256:8537197b3f57d86a59397b89b4fbdd14900a602cc12961eae338b9ef2513cdc0
[exporter]
[exporter] *** Image: index.docker.io/pasapples/pivotal-mysql-web:latest@sha256:c862eda516289c2daa29580c95b74b4d72eca9caf941a3a6ac2bf2bd886057e5
===> CACHING
[cacher] Caching layer 'org.cloudfoundry.openjdk:d2df8bc799b09c8375f79bf646747afac3d933bb1f65de71d6c78e7466ff8fe4' with SHA sha256:11439713b023be71211cb83ecd56a1be63e0c0be3e4814a18cc4c71d2264dea5
Successfully built image pasapples/pivotal-mysql-web:latest
At this point you have a OCI compliant image sitting in your registry ready to be consumed for your K8's application needs all from just source code or pre compiled source code in this example a Java Application. Let's not forget this support's a polyglot programming model so supports NodeJS, Python and anything that buildpack's supports.
More Information
1. Cloud Native Buildpacks: an Industry-Standard Build Process for Kubernetes and Beyond.
2. buildspacks.io Home Page
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