运行Tomcat尝试连接到Docker容器时出错

Question

Previously I kept getting the access denied error but at least it was trying to set a connection. Now this is all I get: Caused by: java.sql.SQLException: Could not connect to address=(host=localhost)(port=3306)(type=master). I would appreciate your help.

Answer 1

By default, Docker containers run on a bridge network. Thus the Docker container's localhost does not point to the localhost of the Docker host inside which the container runs.

Find out the IP address of your Docker host:

ifconfig \
| grep -E "([0-9]{1,3}\.){3}[0-9]{1,3}" \
| grep -v 127.0.0.1 \
| awk '{ print $2 }' \
| cut -f2 -d: \
| head -n1

Or if you're on macOS, you can use docker.for.mac.localhost (or docker.for.win.localhost on Windows).