Question

我正在尝试在Amazon Linux EC2实例上将Spring Boot应用程序作为服务启动。

我将服务包装为：

$ mvn clean package spring-boot:repackage -Dstart-class=com.acme.MyMicroserviceApplication

当我手动启动服务（不带服务）时，它会运行正确：

$ /usr/bin/java -Djava.security.egd=file:/dev/./urandom -Dspring.profiles.active=pro -server -d64 -Xms256m -Xmx2048m -Xss256m -XX:+UseParallelGC -XX:MaxHeapSize=2048m -XX:MaxMetaspaceSize=1024m -XX:MaxHeapFreeRatio=75 -XX:+HeapDumpOnOutOfMemoryError -jar /home/ec2-user/jars/my-microservice-1.0.0-RELEASE.jar

INFO [主] org.springframework.boot.web.embedded.tomcat.TomcatWebServer：Tomcat 在端口8080（http）上启动，上下文路径为''INFO [main] org.springframework.boot.StartupInfoLogger：已启动在12.17秒内运行FacebookServiceApplication（JVM运行12.861） INFO [http-nio-8080-exec-1] org.apache.juli.logging.DirectJDKLog：初始化Spring DispatcherServlet'dispatcherServlet'信息 [http-nio-8080-exec-1] org.springframework.web.servlet.FrameworkServlet：初始化Servlet 'dispatcherServlet'信息[http-nio-8080-exec-1] org.springframework.web.servlet.FrameworkServlet：已完成在23毫秒内初始化

但是当我启动服务时，Spring Boot找不到该类：

org.springframework.boot.loader.JarLauncher

错误是：

my-microservice[27205]: Error: Could not find or load main class org.springframework.boot.loader.JarLauncher
systemd[1]: squint-facebook.service: main process exited, code=exited, status=1/FAILURE
systemd[1]: Unit my-micro.service entered failed state.
systemd[1]: my-micro.service failed.
systemd[1]: Stopped my-microservice.

我的服务文件是：

/etc/systemd/system/my-micro.service

[Unit]
Description=my-microservice
After=syslog.target network.target
Wants=redis.service

[Service]
Type=simple
EnvironmentFile=/etc/sysconfig/my-microservice
Environment="JAVA_HOME=$(dirname $(dirname $(readlink $(readlink $(which java)))))"
Environment="PATH=$PATH:$JAVA_HOME/bin"
Environment="CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib"
Environment="SPRING_PROFILES_ACTIVE=pro"
Environment="JAVA_OPTS=-Djava.security.egd=file:/dev/./urandom -Dspring.profiles.active=pro -server -d64 -Xms256m -Xmx2048m -Xss256m -XX:+UseParallelGC -XX:MaxHeapSize=2048m -XX:MaxMetaspaceSize=1024m -XX:MaxHeapFreeRatio=75 -XX:+HeapDumpOnOutOfMemoryError"
User=springboot
# The configuration file application.properties should be here:
WorkingDirectory=/home/ec2-user/jars
# Run ExecStartPre with root-permissions
PermissionsStartOnly=true
ExecStartPre=/bin/mkdir -p /var/log/my-microservice
ExecStartPre=/bin/chown -R springboot:syslog /var/log/my-microservice
ExecStartPre=/bin/chmod -R 775 /var/log/my-microservice
ExecStart=/usr/bin/java \
        -Djava.security.egd=file:/dev/./urandom \
        -Dspring.profiles.active=pro \
        -server \
        -d64 \
        -Xms256m \
        -Xmx2048m \
        -Xss256m \
        -XX:+UseParallelGC \
        -XX:MaxHeapSize=2048m \
        -XX:MaxMetaspaceSize=1024m \
        -XX:MaxHeapFreeRatio=75 \
        -XX:+HeapDumpOnOutOfMemoryError \
        -jar my-microservice-1.0.0-RELEASE.jar
SuccessExitStatus=143
StandardOutput=journal
StandardError=journal
KillSignal=SIGINT
TimeoutStopSec=20
Restart=always
RestartSec=5
StartLimitInterval=0
StartLimitBurst=10
SyslogIdentifier=my-microservice

[Install]
WantedBy=multi-user.target

我的项目的pom.xml文件是：

<?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 http://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>2.1.6.RELEASE</version>
        <relativePath /> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.teamknowlogy.squint</groupId>
    <artifactId>my-microservice</artifactId>
    <version>1.0.0-RELEASE</version>
    <name>my-microservice</name>
    <description>...</description>

    <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.version>Greenwich.SR1</spring-cloud.version>
        <spring-session.version>1.3.5.RELEASE</spring-session.version>
        <maven.compiler.target>1.8</maven.compiler.target>
        <maven.compiler.source>1.8</maven.compiler.source>
        <!-- The main class to start by executing "java -jar" -->
        <start-class>com.acme.MyMicroserviceApplication</start-class>
        <spring.boot.mainclass>com.acme.MyMicroserviceApplication</spring.boot.mainclass>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-rest</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-aws</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-configuration-processor</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-security</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.session</groupId>
            <artifactId>spring-session-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-cache</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-redis</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.retry</groupId>
            <artifactId>spring-retry</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-loader -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-loader</artifactId>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
            <optional>true</optional>
        </dependency>
        <dependency>
            <artifactId>auth</artifactId>
            <groupId>software.amazon.awssdk</groupId>
        </dependency>
        <dependency>
            <artifactId>aws-core</artifactId>
            <groupId>software.amazon.awssdk</groupId>
        </dependency>
        <dependency>
            <artifactId>s3</artifactId>
            <groupId>software.amazon.awssdk</groupId>
        </dependency>
        <dependency>
            <groupId>com.google.guava</groupId>
            <artifactId>guava</artifactId>
            <version>23.0</version>
        </dependency>
        <dependency>
            <groupId>net.sourceforge.htmlunit</groupId>
            <artifactId>htmlunit</artifactId>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
            <version>2.9.2</version>
        </dependency>
        <dependency>
            <groupId>io.jsonwebtoken</groupId>
            <artifactId>jjwt</artifactId>
            <version>0.9.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.jsoup/jsoup -->
        <dependency>
            <groupId>org.jsoup</groupId>
            <artifactId>jsoup</artifactId>
            <version>1.12.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-pool2 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
        </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>
            <!-- https://mvnrepository.com/artifact/software.amazon.awssdk/bom -->
            <dependency>
                <groupId>software.amazon.awssdk</groupId>
                <artifactId>bom</artifactId>
                <version>2.6.5</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
            <!-- https://spring.io/projects/spring-session -->
            <dependency>
                <groupId>org.springframework.session</groupId>
                <artifactId>spring-session-bom</artifactId>
                <version>Bean-SR3</version>
                <type>pom</type>
                <scope>import</scope>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <resources>
            <resource>
                <directory>src/main/java</directory>
                <includes>
                    <include>**/*.properties</include>
                    <include>**/*.xml</include>
                </includes>
                <filtering>false</filtering>
            </resource>
            <resource>
                <directory>src/main/resources</directory>
            </resource>
        </resources>
        <!-- <sourceDirectory>src</sourceDirectory> -->
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
                <configuration>
                    <skipTests>true</skipTests>
                    <source>1.8</source>
                    <target>1.8</target>
                    <executable>true</executable>
                    <mainClass>${spring.boot.mainclass}</mainClass>
                </configuration>
                <executions>
                    <execution>
                        <goals>
                            <goal>repackage</goal>
                        </goals>
                        <configuration>
                            <mainClass>${spring.boot.mainclass}</mainClass>
                        </configuration>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>

</project>

Java版本：

$ /usr/bin/java -version
openjdk version "1.8.0_201"
OpenJDK Runtime Environment (build 1.8.0_201-b09)
OpenJDK 64-Bit Server VM (build 25.201-b09, mixed mode)

Amazon Linux实例的版本：

$ cat /etc/*release
NAME="Amazon Linux"
VERSION="2"
ID="amzn"
ID_LIKE="centos rhel fedora"
VERSION_ID="2"
PRETTY_NAME="Amazon Linux 2"
ANSI_COLOR="0;33"
CPE_NAME="cpe:2.3:o:amazon:amazon_linux:2"
HOME_URL="https://amazonlinux.com/"
Amazon Linux release 2 (Karoo)

Answer 1

您在单元文件环境配置中使用外壳程序参数扩展（$）：

EnvironmentFile=/etc/sysconfig/my-microservice
Environment="JAVA_HOME=$(dirname $(dirname $(readlink $(readlink $(which java)))))"
Environment="PATH=$PATH:$JAVA_HOME/bin"
Environment="CLASSPATH=.:$JAVA_HOME/jre/lib:$JAVA_HOME/lib"
Environment="SPRING_PROFILES_ACTIVE=pro"
Environment="JAVA_OPTS=-Djava.security.egd=file:/dev/./urandom -Dspring.profiles.active=pro -server -d64 -Xms256m -Xmx2048m -Xss256m -XX:+UseParallelGC -XX:MaxHeapSize=2048m -XX:MaxMetaspaceSize=1024m -XX:MaxHeapFreeRatio=75 -XX:+HeapDumpOnOutOfMemoryError"

Systemd doesn't support shell parameter expansion：

Environment =设置执行过程的环境变量。需要用空格分隔的变量分配列表。此选项可能是指定多次，在这种情况下，所有列出的变量将组。如果将同一变量设置两次，则稍后的设置将覆盖先前的设置。如果将空字符串分配给此选项，重置环境变量列表，之前所有作业无效。内部不执行变量扩展字符串，但是指定符扩展是可能的。 $字符没有特殊含义。如果您需要分配一个包含变量的空格或等号，请使用双引号（“）作为变量分配。

我建议在应用程序的常规setenv.sh文件中定义环境变量。

Sprint引导2.1.6无法作为SystemD服务启动

1 个答案: