【发布时间】：2021-12-23 05:30:00
【问题描述】：
我在 App Engine 上部署了一个 SpringBoot 应用程序，我的数据库是 MySQL 8。 对于我的本地测试，我可以使用公共 IP 连接到 Cloud DB，并且连接工作正常。
但是当这个应用程序部署在 App Engine 上时，我得到了错误：
2021-11-09 01:44:50 default[1] 2021-11-09 01:44:50.874 INFO 10 --- [ main] org.hibernate.Version : HHH000412: Hibernate ORM core version 5.4.25.Final
2021-11-09 01:44:51 default[1] 2021-11-09 01:44:51.092 INFO 10 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.1.2.Final}
2021-11-09 01:46:58 default[1] 2021-11-09 01:46:58.343 WARN 10 --- [ main] o.h.e.j.e.i.JdbcEnvironmentInitiator : HHH000342: Could not obtain connection to query metadata
2021-11-09 01:46:58 default[1]
2021-11-09 01:46:58 default[1] com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
2021-11-09 01:46:58 default[1]
2021-11-09 01:46:58 default[1] The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
2021-11-09 01:46:58 default[1] at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) ~[mysql-connector-java-8.0.26.jar!/:8.0.26]
2021-11-09 01:46:58 default[1] at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) ~[mysql-connector-java-8.0.26.jar!/:8.0.26]
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Caused by: java.net.ConnectException: Connection timed out (Connection timed out)
我已按照文档中提到的步骤进行操作： https://cloud.google.com/sql/docs/mysql/connect-app-engine-standard
app.yaml
runtime: java11
instance_class: F2
entrypoint: java -noverify -jar strategy-0.0.1-SNAPSHOT.war
application.properties
#spring.datasource.url=jdbc:mysql://35.345.11.132:3306/fin_strat
spring.datasource.url=jdbc:mysql://localhost:3306/fin_strat
spring.datasource.username=<database-user-name>
spring.datasource.password=<database-password>
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
我不确定从 App Engine 连接时遗漏了什么。 请帮忙。
【问题讨论】：
标签： google-app-engine google-cloud-platform google-cloud-sql