原文网址:K8S--部署SpringBoot调用MySQL(实战)-CSDN博客
本文介绍K8S部署SpringBoot调用MySQL的实战案例。
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见:K8S--部署SpringBoot调用MySQL(实战)-CSDN博客
部署之后,创建数据库和表:
DROP DATABASE IF EXISTS mp;
CREATE DATABASE mp DEFAULT CHARACTER SET utf8;
USE mp;
DROP TABLE IF EXISTS `t_user`;
SET NAMES utf8mb4;
CREATE TABLE `t_user`
(
`id` BIGINT(0) NOT NULL,
`user_name` VARCHAR(64) NOT NULL COMMENT '用户名(不能重复)',
`nick_name` VARCHAR(64) NULL COMMENT '昵称(可以重复)',
`email` VARCHAR(64) COMMENT '邮箱',
`create_time` DATETIME(0) NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
`update_time` DATETIME(0) NULL DEFAULT CURRENT_TIMESTAMP COMMENT '修改时间',
`deleted_flag` BIGINT(0) NOT NULL DEFAULT 0 COMMENT '0:未删除 其他:已删除',
PRIMARY KEY (`id`) USING BTREE,
UNIQUE KEY `index_user_name_deleted_flag` (`user_name`, `deleted_flag`),
KEY `index_create_time`(`create_time`)
) ENGINE = InnoDB COMMENT = '用户';
INSERT INTO `t_user` VALUES (1, 'knife', '刀刃', 'abc@qq.com', '2021-01-23 09:33:36', '2021-01-23 09:33:36', 0);
INSERT INTO `t_user` VALUES (2, 'sky', '天蓝', '123@qq.com', '2021-01-24 18:12:21', '2021-01-24 18:12:21', 0);
INSERT INTO `t_user` VALUES (3, 'aa', '昵称1', '333@qq.com', '2021-01-12 13:12:21', '2021-01-12 13:12:21', 0);
INSERT INTO `t_user` VALUES (4, 'bb', '昵称2', '444@qq.com', '2021-02-11 18:12:21', '2021-02-11 18:12:21', 0);
INSERT INTO `t_user` VALUES (5, 'cc', '昵称3', '555@qq.com', '2021-03-24 18:12:21', '2021-03-24 18:12:21', 0);
application.yml
spring:
application:
name: springboot-mysql
datasource:
driver-class-name: com.mysql.cj.jdbc.Driver
# 用${}表达式替代,镜像部署时可以使用环境变量指定
url: jdbc:mysql://${MYSQL_HOST:mysql}:${MYSQL_PORT:3306}/mp?characterEncoding=UTF-8&serverTimezone=Asia/Shanghai
username: ${MYSQL_USERNAME:root}
password: ${MYSQL_PASSWORD:222333}
#mybatis-plus配置控制台打印完整带参数SQL语句
mybatis-plus:
configuration:
log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
logging:
file:
# 根据pod名字生成日志文件
name: log/${POD_NAME}.log
level:
root: info
Controller
package com.knife.example.business.user.controller;
import com.knife.example.business.user.bo.UserBO;
import com.knife.example.business.user.entity.User;
import com.knife.example.business.user.service.UserService;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
@Api(tags = "用户")
@RestController
@RequestMapping("/user")
public class UserController {
@Autowired
private UserService userService;
@ApiOperation("查找")
@GetMapping("find")
public List<User> find(UserBO userBO) {
return userService.lambdaQuery()
.like(StringUtils.hasText(userBO.getUserName()), User::getUserName, userBO.getUserName())
.list();
}
}
Dockerfile
# 基础镜像使用java
# 也可以用:FROM openjdk:8
FROM java:8
# 作者
MAINTAINER knife <xxx@xx.com>
# 不是真正的发布端口,只是容器部署人员与建立image的人员之间的交流。
# 即:建立image的人员告诉容器布署人员容器应该映射哪个端口给外界
EXPOSE 8080
# 指定临时文件目录,此步骤非必须。如果Java里要操作文件,就要添加这个配置
# 会在主机 /var/lib/docker 创建文件,连接到容器的/tmp。SpringBoot的内嵌Tomcat默认使用/tmp作为工作目录
VOLUME /tmp
# 将jar包添加到容器中并更名为app.jar
ADD *.jar app.jar
ENV JAVA_OPTS=""
# ENTRYPOINT:docker启动时,运行的命令。这里直接运行jar服务。
ENTRYPOINT [ "sh", "-c", "java $JAVA_OPTS -jar /app.jar --spring.profiles.active=default" ]
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.4.13</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.knife</groupId>
<artifactId>springboot-mysql</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>springboot-mysql</name>
<description>Demo project for Docker Spring Boot</description>
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.github.xiaoymin</groupId>
<artifactId>knife4j-spring-boot-starter</artifactId>
<version>3.0.3</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.24</version>
<scope>provided</scope>
</dependency>
<dependency>
<groupId>com.baomidou</groupId>
<artifactId>mybatis-plus-boot-starter</artifactId>
<version>3.5.1</version>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
详见:K8S--部署SpringBoot项目实战-CSDN博客
这个链接里有harbor的搭建及项目的创建、SpringBoot项目的打包等。
这里只展示命令:
docker rmi 192.168.5.193:15001/custom_image/custom_springboot-mysql:1.0 --force
docker build -t 192.168.5.193:15001/custom_image/custom_springboot-mysql:1.0 . --no-cache
docker push 192.168.5.193:15001/custom_image/custom_springboot-mysql:1.0
推送上去后,可以在harbor里看到:
?
创建名为java-app-namespace.yaml的文件,内容如下:
# 创建命名空间
apiVersion: v1
kind: Namespace
metadata:
name: java-app
labels:
name: java-app
创建命名空间:
kubectl apply -f java-app-namespace.yaml
创建应用的k8s配置文件:k8s.yaml,内容如下:
# 创建Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: springboot-mysql-deployment
namespace: java-app
labels:
app: springboot-mysql #与Service的selector对应
spec:
# 副本的数量
replicas: 2
selector:
# 选择Pod
matchLabels:
app: springboot-mysql
# 选择或创建的Pod的模板
template:
metadata:
# 与Deployment的selector对应
labels:
app: springboot-mysql
spec:
imagePullSecrets:
- name: harbor-secret
containers:
- image: 192.168.5.193:15001/custom_image/custom_springboot-mysql:1.0
name: custom-springboot-mysql-1-0
imagePullPolicy: Always
env:
- name: TZ
value: Asia/Shanghai
- name: MYSQL_HOST
value: mysql-service.db
- name: MYSQL_PORT
value: "3306"
- name: MYSQL_USERNAME
value: root
- name: MYSQL_PASSWORD
value: "123456"
- name: POD_NAME #用Pod名字给日志文件命名,防止多个pod日志输出到同一日志文件
valueFrom:
fieldRef:
fieldPath: metadata.name
ports:
- containerPort: 8080
name: pod-8080
# 容器内的路径
volumeMounts:
- name: log
mountPath: /log/
# 主机的路径
volumes:
- name: log #和volumeMounts中的内容要对应
hostPath:
path: /work/devops/k8s/app/springboot-mysql/log/
type: DirectoryOrCreate
---
# 创建Service
apiVersion: v1
kind: Service
metadata:
name: springboot-mysql-service
namespace: java-app
labels:
app: springboot-mysql
spec:
ports:
- name: springboot-mysql-port
port: 9001 # Service监听的端口
targetPort: 8080 # pod自身暴露的端口。对应Deployment的containerPort
# 对外的端口号
nodePort: 30006
# 选择Deployment
selector:
app: springboot-mysql
# NodePort类型可以对外暴露端口
type: NodePort
注意
k8s在与其他服务通信时,需要注意主机指定
本处mysql的服务名是mysql-service,命名空间是db,所以是:mysql-service:db
kubectl apply -f k8s.yaml
kubectl get pods -A
?结果:
可以发现,每个pod都单独生成了日志。(pod在销毁、重新生成后,会生成新的日志文件。)
访问接口文档:http://192.168.5.193:30006/doc.html
测试接口:(成功查到数据库数据)?