在tomcat docker上部署java REST服务

1 周，5 日 Questions & Answers 1520

我试图将一个简单的REST服务部署到一个运行在docker上的tomcat上，但是我无法访问我试图部署的服务

我创建的简单服务位于此类中：

@Path("/test")
public class RestTest {

    public static final String JSON_RPC = "2.0";

    @GET
    @Path("/hello")
    @Produces(MediaType.APPLICATION_JSON)
    public Response processHelloRequestGet() {
        String answer = "Hello There!";
        JsonRpcResponse rpcResponse = new JsonRpcResponse();
        rpcResponse.setId("42");
        rpcResponse.setJsonRpc(JSON_RPC);
        rpcResponse.setResult(answer);
        return Response.status(Status.OK).entity(rpcResponse).build();
    }
}

它只是以JSON-RPC响应的形式创建一个简单的静态答案

我的web.xml看起来像这样：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="http://java.sun.com/xml/ns/javaee"
    xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee
    http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd"
    version="3.0">

    <display-name>REST Test</display-name>

    <servlet>
        <servlet-name>jerseyServlet</servlet-name>
        <servlet-class>com.sun.jersey.spi.container.servlet.ServletContainer</servlet-class>
        <init-param>
            <param-name>com.sun.jersey.config.property.packages</param-name>
            <param-value>net.jfabricationgames.rest_test</param-value>
        </init-param>
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>jerseyServlet</servlet-name>
        <url-pattern>/rest/*</url-pattern>
    </servlet-mapping>
</web-app>

我的pom.xml看起来像这样：

<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/maven-v4_0_0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>net.jfabricationgames.rest_test</groupId>
    <artifactId>RestTest</artifactId>
    <packaging>war</packaging>
    <version>0.0.1-SNAPSHOT</version>
    <name>RestTest Maven Webapp</name>
    <url>http://maven.apache.org</url>

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

    <dependencies>
        <!-- JAX-RS for REST -->
        <dependency>
            <groupId>javax.ws.rs</groupId>
            <artifactId>javax.ws.rs-api</artifactId>
            <version>2.1-m07</version><!-- <version>2.0</version> -->
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-jdk-http</artifactId>
            <version>2.26</version><!-- <version>2.10.1</version> -->
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.containers</groupId>
            <artifactId>jersey-container-servlet</artifactId>
            <version>2.26</version><!-- <version>2.10.1</version> -->
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.media</groupId>
            <artifactId>jersey-media-json-jackson</artifactId>
            <version>2.26</version><!-- <version>2.10.1</version> -->
        </dependency>

        <dependency>
            <groupId>org.glassfish.jersey.inject</groupId>
            <artifactId>jersey-hk2</artifactId>
            <version>2.26</version>
        </dependency>

        <dependency>
            <groupId>javax.activation</groupId>
            <artifactId>activation</artifactId>
            <version>1.1.1</version>
        </dependency>

        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-json</artifactId>
            <version>1.18.1</version>
        </dependency>
        <dependency>
            <groupId>com.owlike</groupId>
            <artifactId>genson</artifactId>
            <version>0.99</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api -->
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>javax.servlet-api</artifactId>
            <version>3.1.0</version>
            <scope>provided</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/asm/asm -->
        <dependency>
            <groupId>asm</groupId>
            <artifactId>asm</artifactId>
            <version>3.3.1</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.jersey/jersey-bundle -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-bundle</artifactId>
            <version>1.19.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.json/json -->
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20160810</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.jersey/jersey-server -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-server</artifactId>
            <version>1.19.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/com.sun.jersey/jersey-core -->
        <dependency>
            <groupId>com.sun.jersey</groupId>
            <artifactId>jersey-core</artifactId>
            <version>1.19.2</version>
        </dependency>

    </dependencies>
    <build>
        <finalName>RestTest</finalName>
        <plugins>
            <plugin>
                <groupId>org.apache.tomcat.maven</groupId>
                <artifactId>tomcat7-maven-plugin</artifactId>
                <version>2.2</version>
                <configuration>
                    <path>/rest_test</path>
                    <port>8080</port>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

现在，如果我在eclipse中的tomcat服务器上运行该项目，一切都会正常工作（使用运行配置Base directory: ${workspace_loc:/RestTest}和Goals: tomcat7:run），我可以使用URL http://localhost:8080/rest_test/rest/test/hello访问该服务

现在的问题是，我希望我的服务在服务器上docker中的tomcat上运行，这似乎不起作用

到目前为止，我尝试的是将项目导出到一个文件中。war文件（使用maven（gloals:clean install compile）或eclipse导出函数），将它们放在构建docker文件的目录中，创建docker文件并运行它

我正在使用的Dockerfile（以下this tutorial）如下所示：

FROM tomcat:8.0-alpine LABEL maintainer="deepak@softwareyoga.com" ADD rest_test.war /usr/local/tomcat/webapps/ EXPOSE 8080 CMD ["catalina.sh", "run"]

当使用命令docker run -p 80:8080 mywebapp运行docker容器时，我得到以下输出（对我来说似乎是正确的）：

docker run -p 80:8080 mywebapp 21-Oct-2019 16:49:55.404 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/8.0.53 21-Oct-2019 16:49:55.407 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Jun 29 2018 14:42:45 UTC 21-Oct-2019 16:49:55.408 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number: 8.0.53.0 21-Oct-2019 16:49:55.408 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Linux 21-Oct-2019 16:49:55.408 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version: 5.0.0-31-generic 21-Oct-2019 16:49:55.409 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture: amd64 21-Oct-2019 16:49:55.409 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home: /usr/lib/jvm/java-1.7-openjdk/jre 21-Oct-2019 16:49:55.409 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version: 1.7.0_181-b01 21-Oct-2019 16:49:55.410 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation 21-Oct-2019 16:49:55.410 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: /usr/local/tomcat 21-Oct-2019 16:49:55.411 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: /usr/local/tomcat 21-Oct-2019 16:49:55.411 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties 21-Oct-2019 16:49:55.412 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager 21-Oct-2019 16:49:55.412 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048 21-Oct-2019 16:49:55.412 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.protocol.handler.pkgs=org.apache.catalina.webresources 21-Oct-2019 16:49:55.413 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs= 21-Oct-2019 16:49:55.413 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/usr/local/tomcat 21-Oct-2019 16:49:55.413 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/usr/local/tomcat 21-Oct-2019 16:49:55.414 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/usr/local/tomcat/temp 21-Oct-2019 16:49:55.414 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent Loaded APR based Apache Tomcat Native library 1.2.17 using APR version 1.6.3. 21-Oct-2019 16:49:55.414 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true]. 21-Oct-2019 16:49:55.418 INFO [main] org.apache.catalina.core.AprLifecycleListener.initializeSSL OpenSSL successfully initialized (OpenSSL 1.0.2o 27 Mar 2018) 21-Oct-2019 16:49:55.528 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-apr-8080"] 21-Oct-2019 16:49:55.556 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-apr-8009"] 21-Oct-2019 16:49:55.561 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 1095 ms 21-Oct-2019 16:49:55.677 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service Catalina 21-Oct-2019 16:49:55.677 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/8.0.53 21-Oct-2019 16:49:55.760 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /usr/local/tomcat/webapps/rest_test.war 21-Oct-2019 16:49:56.810 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /usr/local/tomcat/webapps/rest_test.war has finished in 1,050 ms 21-Oct-2019 16:49:56.820 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive /usr/local/tomcat/webapps/sample.war 21-Oct-2019 16:49:56.911 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive /usr/local/tomcat/webapps/sample.war has finished in 91 ms 21-Oct-2019 16:49:56.913 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /usr/local/tomcat/webapps/docs 21-Oct-2019 16:49:56.986 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /usr/local/tomcat/webapps/docs has finished in 73 ms 21-Oct-2019 16:49:56.992 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /usr/local/tomcat/webapps/examples 21-Oct-2019 16:49:57.799 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /usr/local/tomcat/webapps/examples has finished in 807 ms 21-Oct-2019 16:49:57.801 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /usr/local/tomcat/webapps/ROOT 21-Oct-2019 16:49:57.882 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /usr/local/tomcat/webapps/ROOT has finished in 82 ms 21-Oct-2019 16:49:57.885 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /usr/local/tomcat/webapps/manager 21-Oct-2019 16:49:57.984 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /usr/local/tomcat/webapps/manager has finished in 99 ms 21-Oct-2019 16:49:57.993 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory /usr/local/tomcat/webapps/host-manager 21-Oct-2019 16:49:58.081 INFO [localhost-startStop-1] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory /usr/local/tomcat/webapps/host-manager has finished in 88 ms 21-Oct-2019 16:49:58.088 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-apr-8080"] 21-Oct-2019 16:49:58.156 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-apr-8009"] 21-Oct-2019 16:49:58.187 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 2625 ms

到目前为止，docker容器的启动似乎是正确的，我可以通过在浏览器中输入localhost来访问tomcat的“主页”（见下图）。也是我的。war文件似乎已正确添加和提取（tomcat docker容器的目录webapps中有一个rest_test.war文件和一个rest_test目录）。此外，从eclipse中启动时，一切都正常工作

目前还不起作用的是访问我创建和部署的rest服务。我试图使用url localhost/rest_test/rest/test/hello访问它，但我得到一个HTTP错误404-找不到

有点奇怪的是，我在调用urllocalhost/rest_test/rest/...时没有收到HTTP错误404中的消息，但我在调用任何其他url时收到消息（如下图所示），这让我认为这并不是完全错误的，我正在尝试的是

提前谢谢

编辑：使用docker映像tomcat:9.0-alpine更新为tomcat 9，但这似乎没有改变任何事情。报告的内容。war文件如下所示：

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共 (1) 个答案

# 1 楼答案

war文件似乎没有正确构建。缺少包含jar应用程序依赖项的WEB-INF/libs目录。有关Web应用程序存档文件here的目录布局的详细信息

启动期间引发的异常将记录到/usr/local/tomcat/logs/localhost.<timestamp>.log。这就是一切似乎都正常工作的原因localhost.log应包含以下错误：

java.lang.ClassNotFoundException: com.sun.jersey.spi.container.servlet.ServletContainer

正如评论中提到的，jersey 2.26不能与java 1.7.0_181一起运行。由于在应用程序启动期间没有加载库，因此输出中没有java版本不兼容错误

现在，假设您使用Tomcat9和Java8运行，第一步是修复构建。我建议从命令行运行maven。你的pom.xml看起来很好，它应该会引发一场有效的战争

下一步是将javax.ws.rs-api库的范围设置为提供。jersey-bundle库的javax.ws.rs类版本稍有不同，如果保留这两个类，则可能会遇到类加载问题

<dependency> <groupId>javax.ws.rs</groupId> <artifactId>javax.ws.rs-api</artifactId> <version>2.1</version> <scope>provided</scope> </dependency>

这将解决问题，但配置仍然存在问题，因为您正在使用jersey 1。x和球衣2。x库。此外jersey-bundle不应与maven一起使用该捆绑包仅适用于不使用Maven依赖系统的开发人员

使用jersey 2库的基本依赖项配置应如下所示：

<properties> <maven.compiler.source>1.8</maven.compiler.source> <maven.compiler.target>1.8</maven.compiler.target> <jersey2.version>2.26</jersey2.version> <jaxrs.version>2.1.1</jaxrs.version> </properties> <dependencies> <! JAX-RS > <dependency> <groupId>javax.ws.rs</groupId> <artifactId>javax.ws.rs-api</artifactId> <version>${jaxrs.version}</version> </dependency> <! Jersey > <dependency> <groupId>org.glassfish.jersey.containers</groupId> <artifactId>jersey-container-servlet</artifactId> <version>${jersey2.version}</version> </dependency> <dependency> <groupId>org.glassfish.jersey.core</groupId> <artifactId>jersey-server</artifactId> <version>${jersey2.version}</version> </dependency> <dependency> <groupId>org.glassfish.jersey.core</groupId> <artifactId>jersey-client</artifactId> <version>${jersey2.version}</version> </dependency> <dependency> <groupId>org.glassfish.jersey.media</groupId> <artifactId>jersey-media-json-jackson</artifactId> <version>${jersey2.version}</version> </dependency> <dependency> <groupId>org.glassfish.jersey.inject</groupId> <artifactId>jersey-hk2</artifactId> <version>${jersey2.version}</version> </dependency> </dependencies>

也应修改web.xml：

<servlet> <servlet-name>jersey-serlvet</servlet-name> <servlet-class>org.glassfish.jersey.servlet.ServletContainer</servlet-class> <init-param> <param-name>jersey.config.server.provider.packages</param-name> <param-value>net.jfabricationgames.rest_test</param-value> </init-param> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>jersey-serlvet</servlet-name> <url-pattern>/rest/*</url-pattern> </servlet-mapping>

希望能有帮助

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在tomcat docker上部署java REST服务

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