We saw how mapping one container port to one host port is done during container creation. Once the port exposure is complete and the container is up and running, the internal port 80 of the container can be accessed using the host machine IP and port, at. You can verify this using ‘ docker ps‘ command: This command will create a container with the image ‘nginx’ and bind the container’s port 80 to the host machine’s port 9090.
#Docker for mac enable remote api how to
How to expose docker ports during container creationĮxposing Docker ports can be done using the ‘-p’ option with ‘docker run’ command to bind the port when launching the container: docker run -d -p 9090:80 -t nginx Users may not even notice this backend forwarding while accessing the webserver. With this port forwarding or port binding feature, users can access the webserver at container port 80 using the host machine port 9000. But the Docker host machine’s main IP is accessible from outside.įor a webserver application, you’d obviously need to enable user access to it from the external network. So, the solution we use is to bind the internal port 80 of the Docker container to a port on the host machine, say 9000.
Suppose you want to run an NginX web server application in your Docker container. You can install the nginx image and start a container but you cannot directly access it from outside network.ĭocker containers have an internal network and each container is associated with an IP address that can be accessed from the Docker host machine.īeing internal IP, this IP cannot be used to access the containers from external network. To allow external access to Docker containers, you would have to expose their ports by mapping a container’s port to an external port in the host. Today we’ll see how to expose docker ports to make them accessible from the internet.
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