Qfyilyi

This is not the same question as: how do I access a mysql database running in a docker container? I have a spring boot app running in a tomcat in a container, built from the official tomcat image.

Dockerfile

FROM tomcat:latest

RUN rm -f -R $CATALINA_HOME/webapps/ROOT

COPY build/libs/web-1.0-SNAPSHOT.war $CATALINA_HOME/webapps/web.war

COPY context.xml $CATALINA_HOME/conf/context.xml

When I want to run the docker container, I say:

docker build .

#it prints out the newly generated container image id such as 08fc6cbf7759

docker run -p 8888:8080 08fc6cbf7759

Then i get a bunch of stack traces related to the db not receiving any packets:

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1699)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:573)

        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:495)

        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:317)

        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)

        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:315)

        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:199)

        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:304)

        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:224)

        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:1012)

        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveNamedBean(DefaultListableBeanFactory.java:981)

If I drop the WAR file into my locally running tomcat instead of running the docker image, it deploy fine, no DB connection issues. So I know there has to be something to docker that's restricting its ability to contact anything on the outside.