如何将 MySQL 从主机连接到 Docker？

Question

I'am new to docker containerization, So i created one custom image for my application, And now i would like to Access MySQL data from host into docker, I did all application configurations but i am getting Communication exception, means docker is not able to communication with MySQL.

Used the following Dockerfile

FROM ubuntu 
RUN ["apt-get", "update"]
RUN ["apt-get", "install", "-y", "vim","curl","jq","apt-utils"]
ENV PATH $PATH:/opt/java/bin 
ENV PATH $PATH:/opt/confluent/bin
ADD confluent-5.2.1 /opt/confluent 
RUN mkdir java 
ADD jdk1.8.0_221 /opt/java
CMD ["/bin/bash","-c","confluent start schema-registry && ./opt/confluent/bin/connect-standalone ./opt/confluent/etc/schema-registry/connect-avro-standalone.properties ./opt/confluent/etc/kafka-connect-jdbc/source-quickstart-sqlite.properties","-n"] 

Answer 1

i understand your question like this: your application runs inside a docker container. your mysql server runs on the host system. you want your application to connect to that mysql server and don't know how.

when you are using mac or win as a host system, you can use docker.host.internal as mysql-server-address.

when you are not using that, you need to find the ip manually. i usually determine the current container address and change the last number to.1, as this always works for me.

within the following issue, there are more ways to do it: https://github.com/docker/for-linux/issues/264

hope this helps