SpringBoot部署应用到本地k8s

在windows+IDEA环境下，使用gradle将springboot打包，制作成镜像发布到docker上并部署到本地k8s访问web应用。

配置文件

build.gradle.kts

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    kotlin("plugin.jpa") version "1.6.10"
    id("org.springframework.boot") version "2.6.4"
    id("io.spring.dependency-management") version "1.0.11.RELEASE"
    kotlin("jvm") version "1.6.10"
    kotlin("plugin.spring") version "1.6.10"
    kotlin("plugin.allopen") version "1.4.32"
    kotlin("kapt") version "1.4.32"
}

group = "com.xun"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_1_8

repositories {
    mavenCentral()
}

dependencies {
    kapt("org.springframework.boot:spring-boot-configuration-processor")
    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
    implementation("org.springframework.boot:spring-boot-starter-mustache")
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
    implementation("org.jetbrains.kotlin:kotlin-reflect")
    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
    developmentOnly("org.springframework.boot:spring-boot-devtools")
    runtimeOnly("com.h2database:h2")
    testImplementation("org.springframework.boot:spring-boot-starter-test")
    testImplementation("org.springframework.boot:spring-boot-starter-test") {
        exclude(module = "junit")
        exclude(module = "mockito-core")
    }
    testImplementation("org.junit.jupiter:junit-jupiter-api")
    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
    testImplementation("com.ninja-squad:springmockk:3.0.1")
}

allOpen{
    annotation("javax.persistence.Entity")
    annotation("javax.persistence.Embeddable")
    annotation("javax.persistence.MappedSuperclass")
}

tasks.withType<KotlinCompile> {
    kotlinOptions {
        freeCompilerArgs = listOf("-Xjsr305=strict")
        jvmTarget = "1.8"
    }
}

tasks.withType<Test> {
    useJUnitPlatform()
}

使用gradle打jar包

打包后的jar包会放在build->libs目录下

编写Dockerfile

FROM java
MAINTAINER 3340556441@qq.com
VOLUME /tmp
ADD /build/libs/springbootkotlin1-0.0.1-SNAPSHOT.jar myspringbootkotlinapp.jar
ENTRYPOINT ["java","-jar","myspringbootkotlinapp.jar"]

制作image

启动docker，启动minikube

minikube start

在Dockerfile所在目录下运行shell，制作镜像

docker build -t myspringbootkotlinapp .

查看镜像

docker images

上传镜像

打标签

docker tag myspringbootkotlinapp sunzhexun/myspringbootkotlinapp

登陆docker

docker login

push镜像

 docker push sunzhexun/myspringbootkotlinapp

minikube创建deployment

自动创建yaml文件

kubectl create deployment myspringbootkotlinapp --image=sunzhexun/myspringbootkotlinapp --dry-run=client -o=yaml > deployment.yaml

echo --- >> deployment.yaml

kubectl create service clusterip myspringbootkotlinapp --tcp=8080:8080 --dry-run=client -o=yaml >> deployment.yaml

apply yaml文件

kubectl apply -f deployment.yaml

查看deployment/svc

kubectl get all

创建容器可能需要几秒到几分钟，可以另起一个终端，查看dashboard

minikube dashboard

创建完成后，

暴露服务

kubectl port-forward svc/myspringbootkotlinapp 8080:8080

访问服务

localhost:8080
此时就可以本地访问我们的springboot应用啦

附录

此springboot项目代码(使用的是kotlin+jpa)

目录

build.gradle.kts配置

import org.jetbrains.kotlin.gradle.tasks.KotlinCompile

plugins {
    kotlin("plugin.jpa") version "1.6.10"
    id("org.springframework.boot") version "2.6.4"
    id("io.spring.dependency-management") version "1.0.11.RELEASE"
    kotlin("jvm") version "1.6.10"
    kotlin("plugin.spring") version "1.6.10"
    kotlin("plugin.allopen") version "1.4.32"
    kotlin("kapt") version "1.4.32"
}


group = "com.xun"
version = "0.0.1-SNAPSHOT"
java.sourceCompatibility = JavaVersion.VERSION_1_8

repositories {
    mavenCentral()
}

dependencies {
    kapt("org.springframework.boot:spring-boot-configuration-processor")
    implementation("org.springframework.boot:spring-boot-starter-data-jpa")
    implementation("org.springframework.boot:spring-boot-starter-mustache")
    implementation("org.springframework.boot:spring-boot-starter-web")
    implementation("com.fasterxml.jackson.module:jackson-module-kotlin")
    implementation("org.jetbrains.kotlin:kotlin-reflect")
    implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
    developmentOnly("org.springframework.boot:spring-boot-devtools")
    runtimeOnly("com.h2database:h2")
    testImplementation("org.springframework.boot:spring-boot-starter-test")
    testImplementation("org.springframework.boot:spring-boot-starter-test") {
        exclude(module = "junit")
        exclude(module = "mockito-core")
    }
    testImplementation("org.junit.jupiter:junit-jupiter-api")
    testRuntimeOnly("org.junit.jupiter:junit-jupiter-engine")
    testImplementation("com.ninja-squad:springmockk:3.0.1")
}

allOpen{
    annotation("javax.persistence.Entity")
    annotation("javax.persistence.Embeddable")
    annotation("javax.persistence.MappedSuperclass")
}


tasks.withType<KotlinCompile> {
    kotlinOptions {
        freeCompilerArgs = listOf("-Xjsr305=strict")
        jvmTarget = "1.8"
    }
}

tasks.withType<Test> {
    useJUnitPlatform()
}

Entities.kt

实体类

import java.time.LocalDateTime
import javax.persistence.Entity
import javax.persistence.GeneratedValue
import javax.persistence.Id
import javax.persistence.ManyToOne

@Entity
class Article(
    var title: String,
    var headline: String,
    var content: String,
    @ManyToOne var author: User,
    var slug: String = title.toSlug(),
    var addedAt: LocalDateTime = LocalDateTime.now(),
    @Id @GeneratedValue var id: Long? = null)

@Entity
class User(
    var login: String,
    var firstname: String,
    var lastname: String,
    var description: String? = null,
    @Id @GeneratedValue var id: Long? = null)

@Entity
class Product(
    var productName: String,
    var categoryId: Int,
    @Id @Generate