【发布时间】：2019-07-09 19:57:54
【问题描述】：
我目前正在 Kubernetes 中运行 Spring Boot Pod。云 SQL 代理的 pod 中有一个边车。
下面是我的spring Boot application.properties配置：
server.port=8081
spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driver
spring.jpa.hibernate.ddl-auto=create-drop
spring.datasource.continue-on-error=true
spring.datasource.url=jdbc:mysql://localhost:3306/<database_name>
spring.datasource.username=<user_name>
spring.datasource.password=<password>
下面是我的 pom.xml 提取的插件和依赖项：
<properties>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-devtools</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>com.jayway.jsonpath</groupId>
<artifactId>json-path</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-hateoas</artifactId>
</dependency>
<dependency>
<groupId>com.h2database</groupId>
<artifactId>h2</artifactId>
<scope>test</scope>
</dependency>
<dependency>
<groupId>ca.performance.common</groupId>
<artifactId>common-http</artifactId>
<version>1.1.1</version>
</dependency>
<dependency>
<groupId>com.google.cloud.sql</groupId>
<artifactId>mysql-socket-factory</artifactId>
<version>1.0.10</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-jdbc</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-gcp-starter-sql-mysql</artifactId>
<version>1.1.0.RELEASE</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
这是我的 deployment.yaml 文件：
apiVersion: v1
kind: Service
metadata:
name: app-dummy-name
spec:
selector:
app: app-dummy-name
ports:
- port: 81
name: http-app-dummy-name
targetPort: http-api
type: LoadBalancer
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: app-dummy-name
spec:
replicas: 1
selector:
matchLabels:
app: app-dummy-name
template:
metadata:
labels:
app: app-dummy-name
spec:
containers:
- name: app-dummy-name
image: <image url>
ports:
- containerPort: 8081
name: http-api
env:
- name: DB_HOST
value: 127.0.0.1:3306
- name: DB_USER
valueFrom:
secretKeyRef:
name: cloudsql-db-credentials
key: username
- name: DB_PASSWORD
valueFrom:
secretKeyRef:
name: cloudsql-db-credentials
key: password
- name: cloudsql-proxy
image: gcr.io/cloudsql-docker/gce-proxy:1.11
command: ["/cloud_sql_proxy",
"-instances=<INSTANCE_CONNECTION_NAME>=:3306",
"-credential_file=/secrets/cloudsql/credentials.json"]
securityContext:
runAsUser: 2 # non-root user
allowPrivilegeEscalation: false
volumeMounts:
- name: cloudsql-instance-credentials
mountPath: /secrets/cloudsql
readOnly: true
volumes:
- name: cloudsql-instance-credentials
secret:
secretName: cloudsql-instance-credentials
我按照this link 的说明进行操作，因此我创建了机密和服务帐户。但是，当我在创建机密后在 Kubernetes 中部署以前的 yaml 文件时，我经常遇到连接拒绝错误：
org.springframework.jdbc.support.MetaDataAccessException: Could not get Connection for extracting meta-data;
nested exception is org.springframework.jdbc.CannotGetJdbcConnectionException: Failed to obtain JDBC Connection;
nested exception is com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure.
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
我什至使用代理和相同的 application.properties 配置在本地测试了 Spring boot 应用程序，它工作正常。
【问题讨论】：
-
只需确保
和 是上述示例代码中的占位符，而不是实际部署中编写的内容。 -
它是一个占位符，而不是实际名称
-
你检查过sidecar容器的日志吗？
-
是否应该将您的 deployment.yaml 中的
DB_HOST替换为：NAME:url VALUE:"jdbc:mysql://localhost:3306/<database_name>"，就像在您的application.properties configuration中一样？与DB_USER相同 -> 用户名和DB_PASSWORD-> 密码 -
也尝试在乞求中明确输入用户名和密码——不要从
cloudsql-db-credentials中提取它们
标签： mysql spring spring-boot kubernetes cloud-sql-proxy