Docker Compose (TOMCAT + POSTGRES) - Spring Boot 应用程序：容器之间的连接问题
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【中文标题】Docker Compose (TOMCAT + POSTGRES) - Spring Boot 应用程序：容器之间的连接问题【英文标题】：Docker Compose (TOMCAT + POSTGRES) - Spring Boot app: connection issue between containers 【发布时间】：2018-09-19 22:22:42 【问题描述】：我有一个连接到 postgresql 的 spring-boot 服务。当我使用 TOMCAT 9.0.6 和一个用于 postgresql 的 docker 容器（只是容器中的数据库）运行应用程序时，应用程序设置工作正常。
但是当我尝试使用 docker compose 运行应用程序时，它没有显示任何内容。
我的 docker-compose.yml
version: "3.3"
services:
webserver:
build:
context: ./appserver
image: webserver
container_name: webserver
depends_on:
- mypostgres
ports:
- "8080:8080"
- "8000:8000"
networks:
- front-tier
- back-tier
mypostgres:
build:
context: ./database
image: postgresdb
container_name: postgresdb
ports:
- "5432:5432"
environment:
- POSTGRES_DB=ggal1701
volumes:
- type: volume
source: psql_data
target: /var/lib/postgresql/data
networks:
- back-tier
volumes:
psql_data:
networks:
front-tier:
back-tier:
我的 dockerfile 进入 ./database:
FROM postgres:9.5
# Copy the database initialize script:
# Contents of /docker-entrypoint-initdb.d are run on postgres startup
ADD docker-entrypoint-initdb.d/ /docker-entrypoint-initdb.d/
# Default values for passwords and database name. Can be overridden on docker run
# ENV mysql_ROOT_PASSWORD=my-secret-pw # Not defaulted for security reasons!
ENV POSTGRES_USER=postgres
ENV POSTGRES_PASSWORD=postgres
我的 dockerfile 进入 ./appserver:
FROM tomcat:9.0.6-jre8
# tomcat-users.xml sets up user accounts for the Tomcat manager GUI
ADD tomcat/tomcat-users.xml $CATALINA_HOME/conf/
# ADD tomcat/catalina.sh $CATALINA_HOME/bin/
ADD tomcat/run.sh $CATALINA_HOME/bin/run.sh
RUN chmod +x $CATALINA_HOME/bin/run.sh
# create mount point for volume with application
WORKDIR $CATALINA_HOME/webapps/
COPY dos.war .
# add MySQL JDBC driver jar
ADD tomcat/postgresql-42.2.2.jar $CATALINA_HOME/lib/
# add tomcat jpda debugging environmental variables
#ENV JPDA_OPTS="-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n"
ENV JPDA_ADDRESS="8000"
ENV JPDA_TRANSPORT="dt_socket"
# start tomcat8 with remote debugging
EXPOSE 8080
CMD ["run.sh"]
最后，我的 Spring Boot 配置成 application.yml：
spring:
# Configuración de la BASE DE DATOS
datasource:
dataSourceClassName: org.postgresql.ds.PGSimpleDataSource
url: jdbc:postgresql://mypostgres:5432/ggal1701
username: postgres
password: postgres
maximum-pool-size: 5
application:
url: http://webserver:8080
profiles:
active: prod
devtools:
restart:
enabled: false
livereload:
enabled: false
server:
compression:
enabled: true
mime-types: text/html,text/xml,text/plain,text/css, application/javascript, application/json
我使用 javamelody，当我转到路径时，它会正确加载它。
但在应用程序路径中，它只加载选项卡中的页面标题，没有其他内容。
Tomcat 日志看起来不错，除了这个（与连接无关）：
webserver | 09:50:43.673 [main] WARN es.asd.GGAL1701.ApplicationWebXml - No Spring profile configured, running with default configuracion
webserver | 09:50:44.466 [main] DEBUG org.springframework.jndi.JndiTemplate - Looking up JNDI object with name [java:comp/env/logging.exception-conversion-word]
webserver | 09:50:44.467 [main] DEBUG org.springframework.jndi.JndiLocatorDelegate - Converted JNDI name [java:comp/env/logging.exception-conversion-word] not found - trying original name [logging.exception-conversion-word]. javax.naming.NameNotFoundException: Name [logging.exception-conversion-word] is not bound in this Context. Unable to find [logging.exception-conversion-word].
webserver | 09:50:44.467 [main] DEBUG org.springframework.jndi.JndiTemplate - Looking up JNDI object with name [logging.exception-conversion-word]
webserver | 09:50:44.467 [main] DEBUG org.springframework.jndi.JndiPropertySource - JNDI lookup for name [logging.exception-conversion-word] threw NamingException with message: Name [logging.exception-conversion-word] is not bound in this Context. Unable to find [logging.exception-conversion-word].. Returning null.
欢迎提出任何想法。该数据库似乎工作正常，因为它与 localhost 上的 tomcat 配合良好。但是通过 dockerizing Tomcat，它失败了。
Edit nº1：尝试先在本地运行，然后上传到云端。这些故障是本地的。
Edit nº2：来自 tomcat docker 的一些新日志：
t ot@281078c55f64:/usr/local/tomcat/logs# cat localhost_access_log.2018-04-11.txt
172.18.0.1 - - [11/Apr/2018:08:28:28 +0000] "GET /dos HTTP/1.1" 302 -
172.18.0.1 - - [11/Apr/2018:08:28:28 +0000] "GET /dos/ HTTP/1.1" 200 964
172.18.0.1 - - [11/Apr/2018:08:28:28 +0000] "GET /assets/css/main-c4c779892e.css HTTP/1.1" 404 1111
172.18.0.1 - - [11/Apr/2018:08:28:28 +0000] "GET /app/vendor-511f175b57.js HTTP/1.1" 404 1101
root@281078c55f64:/usr/local/tomcat/logs# cat localhost.2018-04-11.log
11-Apr-2018 08:27:57.363 INFO [main] org.apache.catalina.core.ApplicationContext.log 2 Spring WebApplicationInitializers detected on classpath
11-Apr-2018 08:28:14.958 INFO [main] org.apache.catalina.core.ApplicationContext.log ContextListener: contextInitialized()
11-Apr-2018 08:28:14.959 INFO [main] org.apache.catalina.core.ApplicationContext.log SessionListener: contextInitialized()
11-Apr-2018 08:28:14.960 INFO [main] org.apache.catalina.core.ApplicationContext.log ContextListener: attributeAdded('StockTicker', 'async.Stockticker@267f6b32')
root@281078c55f64:/usr/local/tomcat/logs# cat catalina.2018-04-11.log 11-Apr-2018 08:27:54.581 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server version: Apache Tomcat/9.0.6 11-Apr-2018 08:27:54.583 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server built: Mar 5 2018 09:34:35 UTC 11-Apr-2018 08:27:54.583 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Server number:
9.0.6.0 11-Apr-2018 08:27:54.583 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Name: Linux 11-Apr-2018 08:27:54.583 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log OS Version:
3.16.0-5-amd64 11-Apr-2018 08:27:54.583 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Architecture: amd64 11-Apr-2018 08:27:54.583 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Java Home: /usr/lib/jvm/java-8-openjdk-amd64/jre 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Version: 1.8.0_162-8u162-b12-1~deb9u1-b12 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log JVM Vendor: Oracle Corporation 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_BASE: /usr/local/tomcat 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log CATALINA_HOME: /usr/local/tomcat 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument:
-Djava.util.logging.config.file=/usr/local/tomcat/conf/logging.properties 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument:
-Djava.util.logging.manager=org.apache.juli.ClassLoaderLogManager 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djdk.tls.ephemeralDHKeySize=2048 11-Apr-2018 08:27:54.584 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument:
-Djava.protocol.handler.pkgs=org.apache.catalina.webresources 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument:
-agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dignore.endorsed.dirs= 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.base=/usr/local/tomcat 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Dcatalina.home=/usr/local/tomcat 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.startup.VersionLoggerListener.log Command line argument: -Djava.io.tmpdir=/usr/local/tomcat/temp 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent Loaded APR based Apache Tomcat Native library [1.2.16] using APR version [1.5.2]. 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true]. 11-Apr-2018 08:27:54.585 INFO [main] org.apache.catalina.core.AprLifecycleListener.lifecycleEvent APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true] 11-Apr-2018 08:27:54.588 INFO [main] org.apache.catalina.core.AprLifecycleListener.initializeSSL OpenSSL successfully initialized [OpenSSL 1.1.0f 25 May 2017] 11-Apr-2018 08:27:54.654 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["http-nio-8080"] 11-Apr-2018 08:27:54.664 INFO [main] org.apache.tomcat.util.net.NioselectorPool.getSharedSelector Using a shared selector for servlet write/read 11-Apr-2018 08:27:54.675 INFO [main] org.apache.coyote.AbstractProtocol.init Initializing ProtocolHandler ["ajp-nio-8009"] 11-Apr-2018 08:27:54.676 INFO [main] org.apache.tomcat.util.net.NioSelectorPool.getSharedSelector Using a shared selector for servlet write/read 11-Apr-2018 08:27:54.677 INFO [main] org.apache.catalina.startup.Catalina.load Initialization processed in 406 ms 11-Apr-2018 08:27:54.703 INFO [main] org.apache.catalina.core.StandardService.startInternal Starting service [Catalina] 11-Apr-2018 08:27:54.704 INFO [main] org.apache.catalina.core.StandardEngine.startInternal Starting Servlet Engine: Apache Tomcat/9.0.6 11-Apr-2018 08:27:54.723 INFO [main] org.apache.catalina.startup.HostConfig.deployWAR Deploying web application archive [/usr/local/tomcat/webapps/dos.war] 11-Apr-2018 08:27:57.309 INFO [main] org.apache.jasper.servlet.TldScanner.scanJars At least one JAR was scanned for TLDs yet contained no TLDs. Enable debug logging for this logger for a complete list of JARs that were scanned but no TLDs were found in them. Skipping unneeded JARs during scanning can improve startup time and JSP compilation time. 11-Apr-2018 08:28:14.765 INFO [main] org.apache.catalina.startup.HostConfig.deployWAR Deployment of web application archive [/usr/local/tomcat/webapps/dos.war] has finished in [20,041] ms 11-Apr-2018 08:28:14.767 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/examples] 11-Apr-2018 08:28:14.967 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/examples] has finished in [199] ms 11-Apr-2018 08:28:14.967 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/ROOT] 11-Apr-2018 08:28:15.022 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/ROOT] has finished in [55] ms 11-Apr-2018 08:28:15.022 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/docs] 11-Apr-2018 08:28:15.075 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/docs] has finished in [53] ms 11-Apr-2018 08:28:15.076 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/host-manager] 11-Apr-2018 08:28:15.138 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/host-manager] has finished in [62] ms 11-Apr-2018 08:28:15.138 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/manager] 11-Apr-2018 08:28:15.197 INFO [main] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/manager] has finished in [59] ms 11-Apr-2018 08:28:15.202 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"] 11-Apr-2018 08:28:15.212 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"] 11-Apr-2018 08:28:15.225 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 20547 ms 11-Apr-2018 08:28:25.201 INFO [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.startup.HostConfig.deployDirectory Deploying web application directory [/usr/local/tomcat/webapps/log] 11-Apr-2018 08:28:25.256 INFO [ContainerBackgroundProcessor[StandardEngine[Catalina]]] org.apache.catalina.startup.HostConfig.deployDirectory Deployment of web application directory [/usr/local/tomcat/webapps/log] has finished in [55] ms
我也试过通过 JAVA_OPTS 传递参数，但是当我 docker tomcat 时它仍然没有显示应用程序。
environment:
- "JAVA_OPTS=-Ddatasource.jdbcUrl=jdbc:postgresql://mypostgres:5432/ggal1701 -Ddatasource.user=postgres -Ddatasource.password=postgres"
编辑 nº3：连接到外部数据库 (RDS AWS) 也不起作用，而在本地，相同版本的 Tomcat 连接没有问题。所以所有的麻烦似乎都来自 dockerized Tomcat。
【问题讨论】：
【参考方案1】：我还不明白为什么，但是更改 Tomcat 的版本已经消失了。这不是使用更早或更高版本的问题。使用 Tomcat 版本 8，它是否可以根据所选的 jre 工作，但 jre 的版本也没有问题，因为在另一个版本中尝试相同的 jre 不起作用。
在 localhost 中运行 tomcat，我的应用程序可以完美运行。用docker，用9.0.6版，就不行了。
我当前的 docker-compose 以防有人发现它有用：
version: "3.3"
services:
mytomcat:
build:
context: ./appserver
image: webserver
container_name: webserver
hostname: webserver
ports:
- "8080:8080"
- "8000:8000"
# links:
# - mypostgres:postgresdb
networks:
- main
mypostgres:
build:
context: ./database
image: postgresdb
container_name: postgresdb
hostname: postgresdb
ports:
- "5432:5432"
volumes:
- db-data:/var/lib/postgresql/data
networks:
- main
volumes:
db-data:
networks:
main:
我没有给出我的答案作为解决方案，因为我不这么认为。解决方案是它使用与本地主机相同的版本；因此，欢迎提供其他答案、解释或解决方案。
【讨论】：
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