--- title: Kubernetesハンズオン - 9. Cloud Native Buildpacksでアプリケーションのコンテナイメージを作成 tags: ["Kubernetes Handson", "Kubernetes", "PKS", "Cloud Native Buildpacks", "pack"] categories: ["Dev", "CaaS", "Kubernetes"] date: 2019-09-23T17:51:52Z updated: 1970-01-01T00:00:00Z --- [Cloud Native Buildpacks](https://buildpacks.io/)を使用してアプリケーションのコンテナイメージを作成します。 Dockerのインストールが必要です。 **目次** ### プロジェクトの作成 以下のコマンドを実行すると、`hello-cf`フォルダに雛形プロジェクトが生成されます。 ``` $ curl https://start.spring.io/starter.tgz \ -d artifactId=hello-cf \ -d baseDir=hello-cf \ -d dependencies=web,actuator \ -d packageName=com.example \ -d applicationName=HelloCfApplication | tar -xzvf - ``` > Spring Boot 2.2.1で動作確認しています。 生成されたプロジェクトのソースを少しだけ修正します。任意のエディタ、IDEで `hello-cf/src/main/java/com/example/HelloCfApplication.java`を開いてください。 ``` java package com.example; import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; // ここから追加 import org.springframework.web.bind.annotation.GetMapping; import org.springframework.web.bind.annotation.RestController; // ここまで @SpringBootApplication @RestController // 追加 public class HelloCfApplication { // ここから追加 @GetMapping("/") public String hello() { return "Hello World!"; } // ここまで public static void main(String[] args) { SpringApplication.run(HelloCfApplication.class, args); } } ``` ソースコードを修正したら、アプリケーションをビルドします。 ``` cd hello-cf ./mvnw package -DskipTests=true ``` まずはローカルでアプリケーションを実行してみましょう。 ``` $ java -jar target/hello-cf-0.0.1-SNAPSHOT.jar . ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.2.1.RELEASE) 2019-11-13 18:07:31.078 INFO 77861 --- [ main] com.example.HelloCfApplication : Starting HelloCfApplication v0.0.1-SNAPSHOT on makinoMacBook-puro.local with PID 77861 (/Users/maki/git/hello-cf/target/hello-cf-0.0.1-SNAPSHOT.jar started by maki in /Users/maki/git/hello-cf) 2019-11-13 18:07:31.081 INFO 77861 --- [ main] com.example.HelloCfApplication : No active profile set, falling back to default profiles: default 2019-11-13 18:07:32.197 INFO 77861 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http) 2019-11-13 18:07:32.214 INFO 77861 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat] 2019-11-13 18:07:32.215 INFO 77861 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.27] 2019-11-13 18:07:32.290 INFO 77861 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2019-11-13 18:07:32.290 INFO 77861 --- [ main] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 1119 ms 2019-11-13 18:07:32.709 INFO 77861 --- [ main] o.s.s.concurrent.ThreadPoolTaskExecutor : Initializing ExecutorService 'applicationTaskExecutor' 2019-11-13 18:07:32.911 INFO 77861 --- [ main] o.s.b.a.e.web.EndpointLinksResolver : Exposing 2 endpoint(s) beneath base path '/actuator' 2019-11-13 18:07:32.982 INFO 77861 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path '' 2019-11-13 18:07:32.992 INFO 77861 --- [ main] com.example.HelloCfApplication : Started HelloCfApplication in 2.362 seconds (JVM running for 2.817) 2019-11-13 18:07:36.166 INFO 77861 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet' 2019-11-13 18:07:36.167 INFO 77861 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet' 2019-11-13 18:07:36.172 INFO 77861 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 5 ms ``` [http://localhost:8080](http://localhost:8080)にアクセスしてください。 ![image](https://user-images.githubusercontent.com/106908/63271809-dc382380-c2d5-11e9-8ae7-6b53788d27fc.png) Hello World!が表示されれば成功です。 ### packコマンドでコンテナイメージ作成 Spring BootアプリのDockerイメージを作成するために、[`pack`](https://buildpacks.io/)コマンドを使用します。 `pack`のインストール方法は[こちら](https://buildpacks.io/docs/install-pack/)を参照にしてください。 `pack`でJavaアプリからDockerイメージに変換するには、MavenまたはGradleを使ったビルド自体を`pack`で行う方法とビルド済みのjarから行う方法があります。 `pack`コマンドでDocker Registryへのpushまで行うので、事前に`docker login`を済ませておいてください。 #### ビルド済みのjarからコンテナイメージを作成する場合 次のコマンドを実行してください。 ``` ./mvnw package -DskipTests=true pack build -p target/hello-cf-0.0.1-SNAPSHOT.jar --builder cloudfoundry/cnb:bionic --publish # 例: pack build making/hello-cf -p target/hello-cf-0.0.1-SNAPSHOT.jar --builder cloudfoundry/cnb:bionic --publish ``` 出力結果 ``` bionic: Pulling from cloudfoundry/cnb Digest: sha256:4de90a3f4904f96af624b6ae32308615388422e8e3805acfc32f3b3be75e7a46 Status: Image is up to date for cloudfoundry/cnb:bionic ===> DETECTING [detector] 6 of 14 buildpacks participating [detector] org.cloudfoundry.openjdk v1.0.56 [detector] org.cloudfoundry.jvmapplication v1.0.78 [detector] org.cloudfoundry.tomcat v1.1.17 [detector] org.cloudfoundry.springboot v1.0.106 [detector] org.cloudfoundry.distzip v1.0.96 [detector] org.cloudfoundry.springautoreconfiguration v1.0.107 ===> RESTORING [restorer] Cache '/cache': metadata not found, nothing to restore ===> ANALYZING [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.openjdk:openjdk-jre' [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' ===> BUILDING [builder] [builder] Cloud Foundry OpenJDK Buildpack v1.0.56 [builder] OpenJDK JRE 11.0.5: Contributing to layer [builder] Downloading from https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.5%2B10/OpenJDK11U-jre_x64_linux_hotspot_11.0.5_10.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 v1.0.78 [builder] Executable JAR: Contributing to layer [builder] Writing CLASSPATH to shared [builder] Process types: [builder] executable-jar: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher [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] [builder] Cloud Foundry Spring Boot Buildpack v1.0.106 [builder] Spring Boot 2.2.1.RELEASE: Contributing to layer [builder] Writing CLASSPATH to shared [builder] Process types: [builder] spring-boot: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] task: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] web: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] [builder] Cloud Foundry Spring Auto-reconfiguration Buildpack v1.0.107 [builder] Spring Auto-reconfiguration 2.11.0: Contributing to layer [builder] Downloading from https://repo.spring.io/release/org/cloudfoundry/java-buildpack-auto-reconfiguration/2.11.0.RELEASE/java-buildpack-auto-reconfiguration-2.11.0.RELEASE.jar [builder] Verifying checksum [builder] Copying to /layers/org.cloudfoundry.springautoreconfiguration/auto-reconfiguration [builder] Writing CLASSPATH to launch ===> EXPORTING [exporter] Reusing layers from image 'index.docker.io/making/hello-cf@sha256:ffee6db2d274a631353432a3d78bbab4a50bbf58157e6b994cd507d57c6c61af' [exporter] Adding layer 'app' [exporter] Adding layer 'config' [exporter] Adding layer 'launcher' [exporter] Adding layer 'org.cloudfoundry.openjdk:openjdk-jre' [exporter] Reusing layer 'org.cloudfoundry.jvmapplication:executable-jar' [exporter] Adding layer 'org.cloudfoundry.springboot:spring-boot' [exporter] Adding layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' [exporter] *** Images (sha256:acc7ac6c6c6769fbd99722545825b361a23f99d9a87e859423304b7a0ca8a792): [exporter] index.docker.io/making/hello-cf:latest ===> CACHING [cacher] Caching layer 'org.cloudfoundry.openjdk:2f08c469c9a8adea1b6ee3444ba2a8242a7e99d87976a077faf037a9eb7f884b' [cacher] Caching layer 'org.cloudfoundry.jvmapplication:executable-jar' [cacher] Caching layer 'org.cloudfoundry.springboot:spring-boot' [cacher] Caching layer 'org.cloudfoundry.springautoreconfiguration:46ab131165317d91fd4ad3186abf755222744e2d277dc413def06f3ad45ab150' Successfully built image making/hello-cf ``` Cloud FoundryのCloud Native Buildpacksが使用されています。 Docker Resistryにアクセスして、イメージがpushされていることを確認してください。 ![image](https://user-images.githubusercontent.com/106908/65448437-c1784200-de73-11e9-9c8d-8481ad62e542.png) #### ソースコードからコンテナイメージを作成する場合 ソースコードのビルドからコンテナ上で行います。 次のコマンドを実行してください。初回はキャッシュがないため、Mavenの依存ライブラリダウンロードに時間がかかります。 ``` pack build --builder cloudfoundry/cnb:bionic --publish # 例: pack build making/hello-cf --builder cloudfoundry/cnb:bionic --publish ``` 出力結果 ``` bionic: Pulling from cloudfoundry/cnb Digest: sha256:4de90a3f4904f96af624b6ae32308615388422e8e3805acfc32f3b3be75e7a46 Status: Image is up to date for cloudfoundry/cnb:bionic ===> DETECTING [detector] 7 of 14 buildpacks participating [detector] org.cloudfoundry.openjdk v1.0.56 [detector] org.cloudfoundry.buildsystem v1.0.125 [detector] org.cloudfoundry.jvmapplication v1.0.78 [detector] org.cloudfoundry.tomcat v1.1.17 [detector] org.cloudfoundry.springboot v1.0.106 [detector] org.cloudfoundry.distzip v1.0.96 [detector] org.cloudfoundry.springautoreconfiguration v1.0.107 ===> RESTORING [restorer] Restoring cached layer 'org.cloudfoundry.openjdk:2f08c469c9a8adea1b6ee3444ba2a8242a7e99d87976a077faf037a9eb7f884b' [restorer] Restoring cached layer 'org.cloudfoundry.jvmapplication:executable-jar' [restorer] Restoring cached layer 'org.cloudfoundry.springboot:spring-boot' [restorer] Restoring cached layer 'org.cloudfoundry.springautoreconfiguration:46ab131165317d91fd4ad3186abf755222744e2d277dc413def06f3ad45ab150' ===> ANALYZING [analyzer] Using cached layer 'org.cloudfoundry.openjdk:2f08c469c9a8adea1b6ee3444ba2a8242a7e99d87976a077faf037a9eb7f884b' [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.openjdk:openjdk-jre' [analyzer] Using cached launch layer 'org.cloudfoundry.jvmapplication:executable-jar' [analyzer] Rewriting metadata for layer 'org.cloudfoundry.jvmapplication:executable-jar' [analyzer] Using cached launch layer 'org.cloudfoundry.springboot:spring-boot' [analyzer] Rewriting metadata for layer 'org.cloudfoundry.springboot:spring-boot' [analyzer] Using cached layer 'org.cloudfoundry.springautoreconfiguration:46ab131165317d91fd4ad3186abf755222744e2d277dc413def06f3ad45ab150' [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' ===> BUILDING [builder] [builder] Cloud Foundry OpenJDK Buildpack v1.0.56 [builder] OpenJDK JDK 11.0.5: Contributing to layer [builder] Downloading from https://github.com/AdoptOpenJDK/openjdk11-binaries/releases/download/jdk-11.0.5%2B10/OpenJDK11U-jdk_x64_linux_hotspot_11.0.5_10.tar.gz [builder] Verifying checksum [builder] Expanding to /layers/org.cloudfoundry.openjdk/openjdk-jdk [builder] Writing JAVA_HOME to build [builder] Writing JDK_HOME to build [builder] OpenJDK JRE 11.0.5: Reusing cached layer [builder] [builder] Cloud Foundry Build System Buildpack v1.0.125 [builder] Using wrapper [builder] Linking Cache to /home/cnb/.m2 [builder] Compiled Application: Contributing to layer [builder] Executing /workspace/mvnw -Dmaven.test.skip=true package [builder] [INFO] Scanning for projects... [builder] Downloading from central: https://repo.maven.apache.org/maven2/org/springframework/boot/spring-boot-starter-parent/2.2.1.RELEASE/spring-boot-starter-parent-2.2.1.RELEASE.pom ...(略)... [builder] Downloaded from central: https://repo.maven.apache.org/maven2/org/vafer/jdependency/2.1.1/jdependency-2.1.1.jar (186 kB at 73 kB/s) Downloaded from central: https://repo.maven.apache.org/maven2/com/google/guava/guava/19.0/guava-19.0.jar (2.3 MB at 455 kB/s) [builder] [INFO] Replacing main artifact with repackaged archive [builder] [INFO] ------------------------------------------------------------------------ [builder] [INFO] BUILD SUCCESS [builder] [INFO] ------------------------------------------------------------------------ [builder] [INFO] Total time: 02:05 min [builder] [INFO] Finished at: 2019-11-13T09:18:10Z [builder] [INFO] ------------------------------------------------------------------------ [builder] Removing source code [builder] [builder] Cloud Foundry JVM Application Buildpack v1.0.78 [builder] Executable JAR: Reusing cached layer [builder] Process types: [builder] executable-jar: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher [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] [builder] Cloud Foundry Spring Boot Buildpack v1.0.106 [builder] Spring Boot 2.2.1.RELEASE: Reusing cached layer [builder] Process types: [builder] spring-boot: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] task: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] web: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] [builder] Cloud Foundry Spring Auto-reconfiguration Buildpack v1.0.107 [builder] Spring Auto-reconfiguration 2.11.0: Reusing cached layer ===> EXPORTING [exporter] Reusing layers from image 'index.docker.io/making/hello-cf@sha256:acc7ac6c6c6769fbd99722545825b361a23f99d9a87e859423304b7a0ca8a792' [exporter] Adding layer 'app' [exporter] Adding layer 'config' [exporter] Reusing layer 'launcher' [exporter] Reusing layer 'org.cloudfoundry.openjdk:openjdk-jre' [exporter] Reusing layer 'org.cloudfoundry.jvmapplication:executable-jar' [exporter] Reusing layer 'org.cloudfoundry.springboot:spring-boot' [exporter] Reusing layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' [exporter] *** Images (sha256:decb11a1e79157d0bc4cc10be1a0ce98e0e39fbaa3aaba0f076c5fd61a8e7d57): [exporter] index.docker.io/making/hello-cf:latest ===> CACHING [cacher] Reusing layer 'org.cloudfoundry.openjdk:2f08c469c9a8adea1b6ee3444ba2a8242a7e99d87976a077faf037a9eb7f884b' [cacher] Caching layer 'org.cloudfoundry.openjdk:6dd0c9c8a740e6c19149e98034fba8e368fd9aa16ab417aa636854d40db1a161' [cacher] Caching layer 'org.cloudfoundry.openjdk:openjdk-jdk' [cacher] Caching layer 'org.cloudfoundry.buildsystem:build-system-cache' [cacher] Reusing layer 'org.cloudfoundry.jvmapplication:executable-jar' [cacher] Reusing layer 'org.cloudfoundry.springboot:spring-boot' [cacher] Reusing layer 'org.cloudfoundry.springautoreconfiguration:46ab131165317d91fd4ad3186abf755222744e2d277dc413def06f3ad45ab150' Successfully built image making/hello-cf ``` ### Kubernetesへデプロイ `hello-cf.yml`を作成して、次の内容を記述してください。 ```yaml apiVersion: apps/v1 kind: Deployment metadata: name: hello-cf spec: replicas: 1 selector: matchLabels: app: hello-cf template: metadata: labels: app: hello-cf spec: containers: - image: :latest # 例: # image: making/hello-cf:latest name: hello-cf ports: - containerPort: 8080 env: - name: _JAVA_OPTIONS value: "-Xmx76221K -Xss1M -XX:MaxMetaspaceSize=89666K -XX:ReservedCodeCacheSize=32M -XX:MaxDirectMemorySize=32M" resources: limits: memory: "256Mi" requests: memory: "256Mi" readinessProbe: httpGet: path: /actuator/health port: 8080 scheme: HTTP initialDelaySeconds: 5 timeoutSeconds: 3 failureThreshold: 3 periodSeconds: 5 livenessProbe: httpGet: path: /actuator/info port: 8080 scheme: HTTP initialDelaySeconds: 10 timeoutSeconds: 1 periodSeconds: 10 failureThreshold: 1 --- kind: Service apiVersion: v1 metadata: name: hello-cf spec: type: LoadBalancer # 環境によってはNodePort selector: app: hello-cf ports: - protocol: TCP port: 8080 ``` 次のコマンドを実行してデプロイしてください。 ``` kubectl apply -f hello-cf.yml ``` 出力結果 ``` deployment.apps/hello-cf created service/hello-cf created ``` `kubectl get all`で作成されたリソースを確認してください。 出力結果例 ``` NAME READY STATUS RESTARTS AGE pod/hello-cf-8479db89-8xgx9 1/1 Running 0 61s NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE service/hello-cf LoadBalancer 10.100.200.86 ac5dd53b3de2711e9812f06c9c16b7d6-10959706.ap-northeast-1.elb.amazonaws.com 8080:30088/TCP 2m1s service/kubernetes ClusterIP 10.100.200.1 443/TCP 252d NAME READY UP-TO-DATE AVAILABLE AGE deployment.apps/hello-cf 1/1 1 1 2m1s NAME DESIRED CURRENT READY AGE replicaset.apps/hello-cf-8479db89 1 1 1 61s ``` `http://:8080`にアクセスしてください。 ``` curl http://:8080 ``` 出力結果 ``` Hello World! ``` ### kbldでイメージDigestを自動更新 まずはアプリケーションを更新します。 `HelloCfApplication.java`を修正して、次の箇所を変更してください。 ```java @GetMapping("/") public String hello() { return "Hello World V2!"; // <- V2に変更 } ``` ビルド&イメージのpushを行います。 #### ビルド済みのjarからコンテナイメージを作成する場合 ``` ./mvnw package -DskipTests=true pack build -p target/hello-cf-0.0.1-SNAPSHOT.jar --builder cloudfoundry/cnb:bionic --publish --no-pull # 例: pack build making/hello-cf -p target/hello-cf-0.0.1-SNAPSHOT.jar --builder cloudfoundry/cnb:bionic --publish --no-pull ``` > `pack build`の2回目以降は`--no-pull`を付けると少し速いです。 出力結果 ``` Selected run image cloudfoundry/run:base-cnb Executing lifecycle version 0.4.0 Using build cache volume pack-cache-5932ea71ff2f.build ===> DETECTING [detector] ======== Results ======== [detector] skip: org.cloudfoundry.archiveexpanding@v1.0.35 [detector] pass: org.cloudfoundry.openjdk@v1.0.19 [detector] skip: org.cloudfoundry.buildsystem@v1.0.39 [detector] pass: org.cloudfoundry.jvmapplication@v1.0.27 [detector] pass: org.cloudfoundry.tomcat@v1.0.42 [detector] pass: org.cloudfoundry.springboot@v1.0.33 [detector] pass: org.cloudfoundry.distzip@v1.0.33 [detector] skip: org.cloudfoundry.procfile@v1.0.12 [detector] skip: org.cloudfoundry.azureapplicationinsights@v1.0.36 [detector] skip: org.cloudfoundry.debug@v1.0.36 [detector] skip: org.cloudfoundry.googlestackdriver@v1.0.22 [detector] skip: org.cloudfoundry.jdbc@v1.0.34 [detector] skip: org.cloudfoundry.jmx@v1.0.33 [detector] pass: org.cloudfoundry.springautoreconfiguration@v1.0.40 [detector] Resolving plan... (try #1) [detector] fail: org.cloudfoundry.openjdk@v1.0.19 provides unused openjdk-jdk [detector] Resolving plan... (try #2) [detector] fail: org.cloudfoundry.jvmapplication@v1.0.27 requires openjdk-jre [detector] Resolving plan... (try #3) [detector] Success! (6) ===> RESTORING [restorer] Restoring cached layer 'org.cloudfoundry.openjdk:70d2cc675155476f1d8516a7ae6729d44681e4fad5a6fc8dfa65cab36a67b7e0' [restorer] Restoring cached layer 'org.cloudfoundry.jvmapplication:executable-jar' [restorer] Restoring cached layer 'org.cloudfoundry.springboot:spring-boot' [restorer] Restoring cached layer 'org.cloudfoundry.springautoreconfiguration:aa54b17fc69a91043437036291e9bad8f5cbf9950fb9bd22c57fe13543b731ce' ===> ANALYZING [analyzer] Analyzing image 'index.docker.io/making/hello-cf@sha256:13a768a45a28463ffd5ec6a76debf6beb86a05503c565d069ebc7e1dbb860039' [analyzer] Using cached layer 'org.cloudfoundry.openjdk:70d2cc675155476f1d8516a7ae6729d44681e4fad5a6fc8dfa65cab36a67b7e0' [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.openjdk:openjdk-jre' [analyzer] Using cached launch layer 'org.cloudfoundry.jvmapplication:executable-jar' [analyzer] Rewriting metadata for layer 'org.cloudfoundry.jvmapplication:executable-jar' [analyzer] Using cached launch layer 'org.cloudfoundry.springboot:spring-boot' [analyzer] Rewriting metadata for layer 'org.cloudfoundry.springboot:spring-boot' [analyzer] Using cached layer 'org.cloudfoundry.springautoreconfiguration:aa54b17fc69a91043437036291e9bad8f5cbf9950fb9bd22c57fe13543b731ce' [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' ===> BUILDING [builder] [builder] Cloud Foundry OpenJDK Buildpack v1.0.19 [builder] OpenJDK JRE 11.0.4: Reusing cached layer [builder] [builder] Cloud Foundry JVM Application Buildpack v1.0.27 [builder] Executable JAR: Reusing cached layer [builder] Process types: [builder] executable-jar: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher [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] [builder] Cloud Foundry Spring Boot Buildpack v1.0.33 [builder] Spring Boot 2.1.8.RELEASE: Reusing cached layer [builder] Process types: [builder] spring-boot: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] task: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] web: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] [builder] Cloud Foundry Spring Auto-reconfiguration Buildpack v1.0.40 [builder] Spring Auto-reconfiguration 2.9.0: Reusing cached layer ===> EXPORTING [exporter] Reusing layers from image 'index.docker.io/making/hello-cf@sha256:13a768a45a28463ffd5ec6a76debf6beb86a05503c565d069ebc7e1dbb860039' [exporter] Reusing layer 'app' with SHA sha256:3e10ef0afc2a159075aeb4cd5afab2bdf46c610de082729329611a5e6c36b887 [exporter] Reusing layer 'config' with SHA sha256:e53a62cd0c4aee176ad63cf82c18198151d52fa7dbe8d19f9747142cba736a21 [exporter] Reusing layer 'launcher' with SHA sha256:ef2cd5869b4d3995edbba8144c8c448f864f3895ea264967701a9a97547d6087 [exporter] Reusing layer 'org.cloudfoundry.openjdk:openjdk-jre' with SHA sha256:c01d3108656d9135fa72131e2e7be2122ff54d7684565aa8ef88682ade2a3781 [exporter] Reusing layer 'org.cloudfoundry.jvmapplication:executable-jar' with SHA sha256:3d9310c8403c8710b6adcd40999547d6dc790513c64bba6abc7a338b429c35d2 [exporter] Reusing layer 'org.cloudfoundry.springboot:spring-boot' with SHA sha256:d8a111b9b3e0b47a5220cdc93b1376e468ec12a55912b8e7d143e625b1418871 [exporter] Reusing layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' with SHA sha256:2b9cf72c4fd529569eef2748180a4f5e5e5eb53683c4cc616b5c07bf66e9fead [exporter] *** Images: [exporter] index.docker.io/making/hello-cf:latest - succeeded [exporter] [exporter] *** Digest: sha256:2ebe3bbe0663dd7ffbb8f265d3239fa4d37dafc280dd165593a1e104d255a082 ===> CACHING [cacher] Reusing layer 'org.cloudfoundry.openjdk:70d2cc675155476f1d8516a7ae6729d44681e4fad5a6fc8dfa65cab36a67b7e0' with SHA sha256:bb6cf0ee3ec0f3f19dd10c0b8dceed7aa7d688895c873bf876c4e4b69bb969a6 [cacher] Reusing layer 'org.cloudfoundry.jvmapplication:executable-jar' with SHA sha256:3d9310c8403c8710b6adcd40999547d6dc790513c64bba6abc7a338b429c35d2 [cacher] Reusing layer 'org.cloudfoundry.springboot:spring-boot' with SHA sha256:d8a111b9b3e0b47a5220cdc93b1376e468ec12a55912b8e7d143e625b1418871 [cacher] Reusing layer 'org.cloudfoundry.springautoreconfiguration:aa54b17fc69a91043437036291e9bad8f5cbf9950fb9bd22c57fe13543b731ce' with SHA sha256:93e4b1fe2affe2b342f0f098c827c58417f2a0624bdc57be9442ca7fbc526fe1 Successfully built image making/hello-cf ``` #### ソースコードからコンテナイメージを作成する場合 ``` pack build --builder cloudfoundry/cnb:bionic --publish --no-pull # 例: pack build making/hello-cf --builder cloudfoundry/cnb:bionic --publish --no-pull ``` > `pack build`の2回目以降は`--no-pull`を付けると少し速いです。またビルドのキャッシュも効きます。 出力結果 ``` bionic: Pulling from cloudfoundry/cnb Digest: sha256:4de90a3f4904f96af624b6ae32308615388422e8e3805acfc32f3b3be75e7a46 Status: Image is up to date for cloudfoundry/cnb:bionic ===> DETECTING [detector] 6 of 14 buildpacks participating [detector] org.cloudfoundry.openjdk v1.0.56 [detector] org.cloudfoundry.jvmapplication v1.0.78 [detector] org.cloudfoundry.tomcat v1.1.17 [detector] org.cloudfoundry.springboot v1.0.106 [detector] org.cloudfoundry.distzip v1.0.96 [detector] org.cloudfoundry.springautoreconfiguration v1.0.107 ===> RESTORING [restorer] Restoring cached layer 'org.cloudfoundry.openjdk:2f08c469c9a8adea1b6ee3444ba2a8242a7e99d87976a077faf037a9eb7f884b' [restorer] Restoring cached layer 'org.cloudfoundry.openjdk:6dd0c9c8a740e6c19149e98034fba8e368fd9aa16ab417aa636854d40db1a161' [restorer] Restoring cached layer 'org.cloudfoundry.openjdk:openjdk-jdk' [restorer] Restoring cached layer 'org.cloudfoundry.jvmapplication:executable-jar' [restorer] Restoring cached layer 'org.cloudfoundry.springboot:spring-boot' [restorer] Restoring cached layer 'org.cloudfoundry.springautoreconfiguration:46ab131165317d91fd4ad3186abf755222744e2d277dc413def06f3ad45ab150' ===> ANALYZING [analyzer] Using cached layer 'org.cloudfoundry.openjdk:2f08c469c9a8adea1b6ee3444ba2a8242a7e99d87976a077faf037a9eb7f884b' [analyzer] Using cached layer 'org.cloudfoundry.openjdk:6dd0c9c8a740e6c19149e98034fba8e368fd9aa16ab417aa636854d40db1a161' [analyzer] Using cached layer 'org.cloudfoundry.openjdk:openjdk-jdk' [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.openjdk:openjdk-jre' [analyzer] Using cached launch layer 'org.cloudfoundry.jvmapplication:executable-jar' [analyzer] Rewriting metadata for layer 'org.cloudfoundry.jvmapplication:executable-jar' [analyzer] Using cached launch layer 'org.cloudfoundry.springboot:spring-boot' [analyzer] Rewriting metadata for layer 'org.cloudfoundry.springboot:spring-boot' [analyzer] Using cached layer 'org.cloudfoundry.springautoreconfiguration:46ab131165317d91fd4ad3186abf755222744e2d277dc413def06f3ad45ab150' [analyzer] Writing metadata for uncached layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' ===> BUILDING [builder] [builder] Cloud Foundry OpenJDK Buildpack v1.0.56 [builder] OpenJDK JRE 11.0.5: Reusing cached layer [builder] Removing unused layers [builder] 6dd0c9c8a740e6c19149e98034fba8e368fd9aa16ab417aa636854d40db1a161 [builder] openjdk-jdk [builder] [builder] Cloud Foundry JVM Application Buildpack v1.0.78 [builder] Executable JAR: Reusing cached layer [builder] Process types: [builder] executable-jar: java -cp $CLASSPATH $JAVA_OPTS org.springframework.boot.loader.JarLauncher [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] [builder] Cloud Foundry Spring Boot Buildpack v1.0.106 [builder] Spring Boot 2.2.1.RELEASE: Reusing cached layer [builder] Process types: [builder] spring-boot: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] task: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] web: java -cp $CLASSPATH $JAVA_OPTS com.example.HelloCfApplication [builder] [builder] Cloud Foundry Spring Auto-reconfiguration Buildpack v1.0.107 [builder] Spring Auto-reconfiguration 2.11.0: Reusing cached layer ===> EXPORTING [exporter] Reusing layers from image 'index.docker.io/making/hello-cf@sha256:decb11a1e79157d0bc4cc10be1a0ce98e0e39fbaa3aaba0f076c5fd61a8e7d57' [exporter] Adding layer 'app' [exporter] Adding layer 'config' [exporter] Reusing layer 'launcher' [exporter] Reusing layer 'org.cloudfoundry.openjdk:openjdk-jre' [exporter] Reusing layer 'org.cloudfoundry.jvmapplication:executable-jar' [exporter] Reusing layer 'org.cloudfoundry.springboot:spring-boot' [exporter] Reusing layer 'org.cloudfoundry.springautoreconfiguration:auto-reconfiguration' [exporter] *** Images (sha256:648796d493059758cfbf4f9ccb29c5912124007a3acbba57f7756ae6fd05e027): [exporter] index.docker.io/making/hello-cf:latest ===> CACHING [cacher] Reusing layer 'org.cloudfoundry.openjdk:2f08c469c9a8adea1b6ee3444ba2a8242a7e99d87976a077faf037a9eb7f884b' [cacher] Reusing layer 'org.cloudfoundry.jvmapplication:executable-jar' [cacher] Reusing layer 'org.cloudfoundry.springboot:spring-boot' [cacher] Reusing layer 'org.cloudfoundry.springautoreconfiguration:46ab131165317d91fd4ad3186abf755222744e2d277dc413def06f3ad45ab150' Successfully built image making/hello-cf ``` --- Dockerイメージのタグが`latest`で同じであり、また`hello-cf.yml`に何も変更がないため`kubectl apply -f hello-cf.yml`を実行しても何も変化が起きません。 この場合は、`hello-cf.yml`中の ``` image: :latest ``` の部分を ``` image: @sha256: ``` 形式にすれば確実に指定したイメージへアップデートされます。 上記の出力結果の場合は、`image`に設定する値は`making/hello-cf@sha256:2ebe3bbe0663dd7ffbb8f265d3239fa4d37dafc280dd165593a1e104d255a082`です。 [`kbld`](https://get-kbld.io)を使うと、``を更新する作業を次のコマンドで自動化できます。 [こちら](https://github.com/k14s/kbld/releases)からバイナリをダウンロードして`kbld`をインストールしてください。 次のコマンドを実行してコンテナイメージを更新してください。 ``` kbld -f hello-cf.yml | kubectl apply -f - ``` 出力結果 ``` resolve | final: making/hello-cf:latest -> index.docker.io/making/hello-cf@sha256:2ebe3bbe0663dd7ffbb8f265d3239fa4d37dafc280dd165593a1e104d255a082 deployment.apps/hello-cf configured service/hello-cf unchanged ``` 再度、`http://:8080`にアクセスしてください。 ``` curl http://:8080 ``` 出力結果 ``` Hello World V2! ``` ### リソースの削除 ``` kubectl delete -f hello-cf.yml ``` 出力結果 ``` deployment.apps "hello-cf" deleted service "hello-cf" deleted ```