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
Cloud Native Buildpacks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。
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にアクセスしてください。
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コマンドを使用します。
packのインストール方法はこちら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 <image-name> -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。
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 <image-name> --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。
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: <image-name>: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 <none> 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://<ServiceのExternal IP>:8080にアクセスしてください。
curl http://<ServiceのExternal IP>: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。
@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 <image-name> -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 <image-name> --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: <image-name>:latest
の部分を
image: <image-name>@sha256:<image-digest>
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を使うと、<image-digest>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://<ServiceのExternal IP>:8080にアクセスしてください。
curl http://<ServiceのExternal IP>: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