Cloud Native Buildpacksの対応
18088 ワード
はじめに
以下の通り、Spring Boot2.3からはDockerImageの作成が簡易になっている。k8s上ではDockerImageがベースであり、これが簡易に作成されるのはCI/CDの点から利点だと考えている。
https://qiita.com/omix222/items/d305f68f3f021529ec94
実施内容
• build.gradleは、特に特別な対応は不要。pluginのjavaでtaskに追加される。
• 以下、buildspec.yml内にて、bootBuildImageを実行のみ。
buildspec.yml
version: 0.2
env:
variables:
IMAGE_NAME: "spring-boot-democlient"
AWS_ACCOUNT: "XXXXXXXXXXXX"
# TODO: 本来はgradleのartifactから取ってくる必要がある。
# See Also https://docs.spring.io/spring-boot/docs/current-SNAPSHOT/gradle-plugin/reference/html/#build-image-customization
IMAGE_REPO: "docker.io/library/spring-boot-democlient"
phases:
install:
commands:
- chmod +x ./gradlew
- touch gradle.properties
- |
cat <<EOL >> gradle.properties
org.gradle.jvmargs=-Xmx2048m -XX:MaxPermSize=512m
EOL
- nohup /usr/local/bin/dockerd --host=unix:///var/run/docker.sock --host=tcp://127.0.0.1:2375 --storage-driver=overlay&
- timeout 15 sh -c "until docker info; do echo .; sleep 1; done"
pre_build:
commands:
- echo build start on `date`
- $(aws ecr get-login --no-include-email)
build:
commands:
- ./gradlew bootBuildImage --imageName=${IMAGE_NAME}
- docker tag ${IMAGE_REPO}:latest ${AWS_ACCOUNT}.dkr.ecr.ap-northeast-1.amazonaws.com/${IMAGE_REPO}:${IMAGE_TAG}
post_build:
commands:
- docker push ${AWS_ACCOUNT}.dkr.ecr.ap-northeast-1.amazonaws.com/${IMAGE_REPO}:${IMAGE_TAG}
cache:
paths:
- /root/.gradle/caches/**/*
- /root/.gradle/wrapper/**/*
注意点
./gradlew bootImageBuildは--imageNameを設定してもdocker.io/library/配下に作られるので、ECRのリポジトリの方もそうやって作る必要がある。
環境情報
本DockerImageをEKS上で動作させた際の、SpringBootAcutatorで取得できる環境情報
{
"activeProfiles": [],
"propertySources": [
{
"name": "server.ports",
"properties": {
"local.server.port": {
"value": 8080
}
}
},
{
"name": "servletContextInitParams",
"properties": {}
},
{
"name": "systemProperties",
"properties": {
"awt.toolkit": {
"value": "sun.awt.X11.XToolkit"
},
"java.specification.version": {
"value": "11"
},
"sun.cpu.isalist": {
"value": ""
},
"sun.jnu.encoding": {
"value": "ANSI_X3.4-1968"
},
"java.class.path": {
"value": "/workspace"
},
"java.vm.vendor": {
"value": "BellSoft"
},
"sun.arch.data.model": {
"value": "64"
},
"java.vendor.url": {
"value": "https://bell-sw.com/"
},
"catalina.useNaming": {
"value": "false"
},
"user.timezone": {
"value": "GMT"
},
"os.name": {
"value": "Linux"
},
"java.vm.specification.version": {
"value": "11"
},
"sun.java.launcher": {
"value": "SUN_STANDARD"
},
"user.country": {
"value": "US"
},
"sun.boot.library.path": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/jre/lib"
},
"sun.java.command": {
"value": "******"
},
"jdk.debug": {
"value": "release"
},
"sun.cpu.endian": {
"value": "little"
},
"user.home": {
"value": "/home/cnb"
},
"user.language": {
"value": "en"
},
"java.specification.vendor": {
"value": "Oracle Corporation"
},
"java.security.properties": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/java-security-properties/java-security.properties"
},
"java.version.date": {
"value": "2020-04-14"
},
"java.home": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/jre"
},
"file.separator": {
"value": "/"
},
"java.vm.compressedOopsMode": {
"value": "32-bit"
},
"line.separator": {
"value": "\n"
},
"java.specification.name": {
"value": "Java Platform API Specification"
},
"java.vm.specification.vendor": {
"value": "Oracle Corporation"
},
"java.awt.graphicsenv": {
"value": "sun.awt.X11GraphicsEnvironment"
},
"java.awt.headless": {
"value": "true"
},
"sun.management.compiler": {
"value": "HotSpot 64-Bit Tiered Compilers"
},
"java.runtime.version": {
"value": "11.0.7+10-LTS"
},
"user.name": {
"value": "cnb"
},
"path.separator": {
"value": ":"
},
"os.version": {
"value": "4.14.181-140.257.amzn2.x86_64"
},
"java.runtime.name": {
"value": "OpenJDK Runtime Environment"
},
"file.encoding": {
"value": "ANSI_X3.4-1968"
},
"spring.beaninfo.ignore": {
"value": "true"
},
"java.vm.name": {
"value": "OpenJDK 64-Bit Server VM"
},
"java.vendor.url.bug": {
"value": "https://bell-sw.com/support"
},
"java.io.tmpdir": {
"value": "/tmp"
},
"catalina.home": {
"value": "/tmp/tomcat.13823454205626436862.8080"
},
"java.version": {
"value": "11.0.7"
},
"user.dir": {
"value": "/workspace"
},
"os.arch": {
"value": "amd64"
},
"java.vm.specification.name": {
"value": "Java Virtual Machine Specification"
},
"PID": {
"value": "1"
},
"java.awt.printerjob": {
"value": "sun.print.PSPrinterJob"
},
"sun.os.patch.level": {
"value": "unknown"
},
"catalina.base": {
"value": "/tmp/tomcat.13823454205626436862.8080"
},
"java.library.path": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/jre/lib:/usr/java/packages/lib:/usr/lib64:/lib64:/lib:/usr/lib"
},
"java.vendor": {
"value": "BellSoft"
},
"java.vm.info": {
"value": "mixed mode"
},
"java.vm.version": {
"value": "11.0.7+10-LTS"
},
"sun.io.unicode.encoding": {
"value": "UnicodeLittle"
},
"java.class.version": {
"value": "55.0"
}
}
},
{
"name": "systemEnvironment",
"properties": {
"PATH": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/security-providers-configurer/bin:/layers/paketo-buildpacks_bellsoft-liberica/openssl-security-provider/bin:/layers/paketo-buildpacks_bellsoft-liberica/memory-calculator/bin:/layers/paketo-buildpacks_bellsoft-liberica/link-local-dns/bin:/layers/paketo-buildpacks_bellsoft-liberica/jre/bin:/layers/paketo-buildpacks_bellsoft-liberica/class-counter/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin",
"origin": "System Environment Property \"PATH\""
},
"BOOT_DEMO_SERVICE_PORT": {
"value": "80",
"origin": "System Environment Property \"BOOT_DEMO_SERVICE_PORT\""
},
"KUBERNETES_PORT": {
"value": "tcp://172.20.0.1:443",
"origin": "System Environment Property \"KUBERNETES_PORT\""
},
"JAVA_HOME": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/jre",
"origin": "System Environment Property \"JAVA_HOME\""
},
"JAVA_OPTS": {
"value": " -Djava.security.properties=/layers/paketo-buildpacks_bellsoft-liberica/java-security-properties/java-security.properties -agentpath:/layers/paketo-buildpacks_bellsoft-liberica/jvmkill/jvmkill-1.16.0-RELEASE.so=printHeapHistogram=1 -XX:ActiveProcessorCount=2 -XX:MaxDirectMemorySize=10M -XX:MaxMetaspaceSize=85939K -XX:ReservedCodeCacheSize=240M -Xss1M -Xmx450636K",
"origin": "System Environment Property \"JAVA_OPTS\""
},
"KUBERNETES_SERVICE_HOST": {
"value": "172.20.0.1",
"origin": "System Environment Property \"KUBERNETES_SERVICE_HOST\""
},
"LD_LIBRARY_PATH": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/jre/lib",
"origin": "System Environment Property \"LD_LIBRARY_PATH\""
},
"JAVA_SECURITY_PROPERTIES": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/java-security-properties/java-security.properties",
"origin": "System Environment Property \"JAVA_SECURITY_PROPERTIES\""
},
"BOOT_DEMO_PORT": {
"value": "tcp://172.20.11.79:80",
"origin": "System Environment Property \"BOOT_DEMO_PORT\""
},
"BOOT_DEMO_PORT_80_TCP": {
"value": "tcp://172.20.11.79:80",
"origin": "System Environment Property \"BOOT_DEMO_PORT_80_TCP\""
},
"PWD": {
"value": "/workspace",
"origin": "System Environment Property \"PWD\""
},
"BOOT_DEMO_SERVICE_HOST": {
"value": "172.20.11.79",
"origin": "System Environment Property \"BOOT_DEMO_SERVICE_HOST\""
},
"_": {
"value": "/layers/paketo-buildpacks_bellsoft-liberica/jre/bin/java",
"origin": "System Environment Property \"_\""
},
"KUBERNETES_PORT_443_TCP": {
"value": "tcp://172.20.0.1:443",
"origin": "System Environment Property \"KUBERNETES_PORT_443_TCP\""
},
"BOOT_DEMO_PORT_80_TCP_PROTO": {
"value": "tcp",
"origin": "System Environment Property \"BOOT_DEMO_PORT_80_TCP_PROTO\""
},
"KUBERNETES_PORT_443_TCP_ADDR": {
"value": "172.20.0.1",
"origin": "System Environment Property \"KUBERNETES_PORT_443_TCP_ADDR\""
},
"KUBERNETES_PORT_443_TCP_PROTO": {
"value": "tcp",
"origin": "System Environment Property \"KUBERNETES_PORT_443_TCP_PROTO\""
},
"CLASSPATH": {
"value": "/workspace",
"origin": "System Environment Property \"CLASSPATH\""
},
"KUBERNETES_SERVICE_PORT": {
"value": "443",
"origin": "System Environment Property \"KUBERNETES_SERVICE_PORT\""
},
"BOOT_DEMO_PORT_80_TCP_PORT": {
"value": "80",
"origin": "System Environment Property \"BOOT_DEMO_PORT_80_TCP_PORT\""
},
"HOSTNAME": {
"value": "boot-demo-647b49ddcc-97zcm",
"origin": "System Environment Property \"HOSTNAME\""
},
"BOOT_DEMO_PORT_80_TCP_ADDR": {
"value": "172.20.11.79",
"origin": "System Environment Property \"BOOT_DEMO_PORT_80_TCP_ADDR\""
},
"KUBERNETES_PORT_443_TCP_PORT": {
"value": "443",
"origin": "System Environment Property \"KUBERNETES_PORT_443_TCP_PORT\""
},
"KUBERNETES_SERVICE_PORT_HTTPS": {
"value": "443",
"origin": "System Environment Property \"KUBERNETES_SERVICE_PORT_HTTPS\""
},
"SHLVL": {
"value": "1",
"origin": "System Environment Property \"SHLVL\""
},
"HOME": {
"value": "/home/cnb",
"origin": "System Environment Property \"HOME\""
},
"MALLOC_ARENA_MAX": {
"value": "2",
"origin": "System Environment Property \"MALLOC_ARENA_MAX\""
}
}
},
{
"name": "applicationConfig: [classpath:/application.properties]",
"properties": {
"management.endpoints.enabled-by-default": {
"value": "true",
"origin": "class path resource [application.properties]:1:41"
},
"management.endpoints.web.exposure.include": {
"value": "*",
"origin": "class path resource [application.properties]:2:43"
}
}
}
]
}
まとめ＆考察
今までは以下のようにDockerfileを作成する必要があった。
FROM openjdk:8-jdk-alpine
ARG JAR_FILE=target/*.jar
COPY ${JAR_FILE} app.jar
ENTRYPOINT ["java","-jar","/app.jar"]
これを作らなくていいのは確かに便利であるが、逆に言うと勝手に選定されてしまうため、商用で利用する場合は、そのような条件下で問題ないか確認する必要がある。
例えば、JVMの保守などが必要なエンタープライズ向けプロジェクトの場合は、あまり向いていないと考えられる。しかし、小規模でそのような細かいことに拘らないプロジェクトであれば、Dockerの知識があまり不要なため、採用する余地はあると考える。
勿論、作業省力化のため、CI/CDも事前にセットで作成しておくべきなのは言うまでもない。
参考
Author And Source
この問題について(Cloud Native Buildpacksの対応), 我々は、より多くの情報をここで見つけました https://qiita.com/fake-deli-ca/items/de574627bc3386e1715f著者帰属：元の著者の情報は、元のURLに含まれています。著作権は原作者に属する。
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