mysql - 将 Spring Boot 应用程序连接到 Google Cloud 中的 MySQL 数据库

Question

我正在尝试使用带有 MySQL 数据库的 jdbc 将 Spring Boot Maven 应用程序部署到带有第二代数据库的灵活的 Google App Engine 项目。当应用程序和数据库都在本地运行时(spring-boot:run & XAMPP)，所有功能都符合预期。当应用程序在本地运行并且数据库在 Google CloudSQL 上时，所有功能仍然正常运行。但是，当两个实体都部署到 Google Cloud 时，我的应用程序在尝试访问数据库时出现“连接链接失败”。该应用程序部署良好并提供硬编码响应。应用程序和数据库位于同一个 Google Cloud 项目中，CloudSQL 存储桶设置为允许所有项目文件访问。但是我也尝试将它们分成单独的项目并在数据库列表中授权应用程序的项目。不用找了。它的行为与我尝试从未经授权的 IP 地址访问数据库时完全一样。

我已按照建议将元素添加到 app.yaml 文件中进行操作。

runtime: java
env: flex

runtime_config:  # Optional
jdk: openjdk8

handlers:
   - url: /.*
   script: this field is required, but ignored

# I've tried implementing env_variables and beta setting
# both separately and in tandem.
env_variables:
   MYSQL_DSN: mysql:unix_socket=/cloudsql/jdbc:mysql://12.345.67.890;dbname=exam
   MYSQL_USER: username
   MYSQL_PASSWORD: password

beta_settings:
   cloud_sql_instances: mytestproject1-123456:europe-west1:mydb  

manual_scaling:
   instances: 1

我已按照建议将元素添加到 application.properties 文件中进行操作。

spring.datasource.driverClassName=com.mysql.jdbc.Driver
spring.datasource.url=jdbc:mysql://12.345.67.890/exam
spring.datasource.username=username
spring.datasource.password=password

# I've also tried this url formulation:
#spring.datasource.url=jdbc:mysql://google/exam?cloudSqlInstance=mytestproject1-123456:europe-west1:mydb&socketFactory=com.google.cloud.sql.mysql.SocketFactory&user=username&password=password&useSSL=false

我已按照建议将元素添加到 POM.xml 文件中进行操作。

http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>

<groupId>com.my</groupId>
<artifactId>myproject</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>

<name>myproject</name>
<description>Demo project for Spring Boot</description>

<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.0.1.RELEASE</version>
    <relativePath/>
</parent>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <java.version>1.8</java.version>
    <spring-cloud-gcp.version>1.0.0.M3</spring-cloud-gcp.version>
    <spring-cloud.version>Finchley.M9</spring-cloud.version>
    <appengine.maven.plugin>1.3.2</appengine.maven.plugin>


    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>

    <INSTANCE_CONNECTION_NAME>mytestproject1-123456:europe-west1:mydb</INSTANCE_CONNECTION_NAME>
    <user>username</user>
    <password>password</password>
    <database>exam</database>
    <sqlURL>jdbc:mysql://google/${database}?cloudSqlInstance=${INSTANCE_CONNECTION_NAME}&amp;socketFactory=com.google.cloud.sql.mysql.SocketFactory&amp;user=${user}&amp;password=${password}&amp;useSSL=false</sqlURL>

</properties>


<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-jdbc</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-gcp-starter</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>com.google.cloud.sql</groupId>
        <artifactId>mysql-socket-factory-connector-j-6</artifactId>
        <version>1.0.8</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
</dependencies>

<dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-gcp-dependencies</artifactId>
            <version>${spring-cloud-gcp.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>1.9.63</version>
        </plugin>
        <plugin>
            <groupId>com.google.cloud.tools</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>${appengine.maven.plugin}</version>
        </plugin>
    </plugins>
</build>

<repositories>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
        <snapshots>
            <enabled>false</enabled>
        </snapshots>
    </repository>
</repositories>

再一次，本地部署一切正常，Cloud MySQL 存储桶可以很好地将其数据提供给本地部署的应用程序。我的问题是，如何让 Spring Boot 应用程序在部署到 Google App Engine 时连接到 Cloud MySQL 实例？

Answer 1

您可能有兴趣试用新的 Spring Cloud GCP integration for Cloud SQL MySQL .它会自动为您选择 JDBC URL。您应该能够以比当前更少的配置运行您的应用。