使用maven在Google App Engine上部署SpringBoot/Angular 4

Question

我尝试在GoogleCloud上部署一个应用程序（目前是免费帐户）。前端（Angular）和后端（Java/JPA/SpringBoot）是用maven在一个.jar中构建。

在本地，在我的服务器上使用Jenkins和Google Shell：

mvn spring-boot：run=>工作正常

mvn AppEngine：Deploy=>502错误

部署标记为成功。但当我检查日志（gcloud应用程序日志尾部--默认）时，SpringBoot部署似乎冻结了，重新启动了，又冻结了，...而且是什么让我抓狂了...有时它会起作用...就在SpringBoot重新启动前几分钟。

所以，我需要一些建议来找出问题所在。

https://maven.apache.org/xsd/maven-4.0.0.xsd“xmlns:xsi=”http://www.w3.org/2001/xmlschema-instance“xmlns=”http://maven.apache.org/pom/4.0.0“>

<modelVersion>4.0.0</modelVersion>

<artifactId>back-office</artifactId>
<name>back-office</name>
<description>Back Office</description>

<parent>
    <groupId>fr.test</groupId>
    <artifactId>mon-parent</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</parent>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-mail</artifactId>
    </dependency>
    <dependency>
        <groupId>org.thymeleaf</groupId>
        <artifactId>thymeleaf-spring4</artifactId>
    </dependency>
    <dependency>
        <groupId>nz.net.ultraq.thymeleaf</groupId>
        <artifactId>thymeleaf-layout-dialect</artifactId>
    </dependency>
    <dependency>
        <groupId>net.sf.jasperreports</groupId>
        <artifactId>jasperreports</artifactId>
        <version>6.1.0</version>
    </dependency>
    <!-- BOOT -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <!-- PERSISTENCE -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
    </dependency>
    <!-- SECURITY -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>
    <dependency>
        <groupId>com.nimbusds</groupId>
        <artifactId>nimbus-jose-jwt</artifactId>
        <version>4.39.2</version>
    </dependency>
    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
    </dependency>
    <dependency>
        <groupId>fr.test</groupId>
        <artifactId>front-office</artifactId>
        <version>${project.version}</version>
        <scope>runtime</scope>
    </dependency>
</dependencies>

<repositories>
  ....
</repositories>

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
        <plugin>
            <groupId>com.google.cloud.tools</groupId>
            <artifactId>appengine-maven-plugin</artifactId>
            <version>1.3.1</version>
      </plugin>
    </plugins>
</build>

这是我的app.yaml配置（在src/main/appengine中）

# [START runtime]
runtime: java
env: flex

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

runtime_config:  # Optional
  jdk: openjdk8
 # server: jetty9

manual_scaling:
  instances: 1
# [END runtime]

Answer 1

根据您描述的症状，我怀疑您的应用程序容器正在耗尽内存，并被OOM杀手杀死。

默认的Flex VM只有1GB内存，留给应用程序容器的内存只有600MB。

一个确定问题在于内存的方法是在Google Cloud Logging UI的vm.syslog中找到类似的内容。

kernel: [  133.706951] Out of memory: Kill process 4490 (java) score 878 or sacrifice child 
kernel: [  133.714468] Killed process 4306 (java) total-vm:5332376kB, anon-rss:2712108kB, file-rss:0k

resources:
  memory_gb: 4