在Docker容器中使用Redis和mysql

Question

My web application needs both mysql and redis server to function properly. I am able to link mysql container with app using link tag (mysql is name of mysql image set using -name tag)

sudo docker run -link mysql:amq -d -p 13310 hitesh/image node app

Now I am not sure how to attach redis to this container. Should it be done via same mysql image (if yes, how two ports ie 3306 & 6379 will be exposed?) or should I make another container for redis and link it to my node.js app (not sure about it is possible or not).

Answer 1

You should have 3 containers

1. your app
2. your mysql
3. your redis

then expose your mysql port and redis port on the relevant containers.

Then when you run your app container just link both mysql and redis containers to your app

so something like

sudo docker run -d -link mysql:mysql -link redis:redis ....

Now your app container will have environment variables for your other two databases

Also, if you want to expose two ports, then in your dockerfile just do EXPOSE port1 port2

eg EXPOSE 22 80

Then you'll get environment variables for both exposed ports. But i'd recommend you don't have a container that runs both mysql and redis. Separate your concerns :)