(Note: If you run your Ubuntu VM in something like VirtualBox and you try to access it from your Windows machine, make sure you opened the ports in VirtualBox too!). If it is not running, check the logs for the reason. If you app does not response, check if the container is running by typing docker ps or the remote API.
When you start your container, you need to bind this port to a port of the host: docker run -p 80:8080 my/application In your Dockerfile you need to EXPOSE the port your app runs on: FROM ubuntu To access the application in the container, you need to open the port in the container and bind to a port on the host. You can also specify a certain host name for the container (by passing the -hostname="test42" to the run command). With this command, Docker will set up the standard network model: It will create a veth interface pair.
You can check this IP address via the remote API or via Docker on the host machine directly. Start your docker container, using the -p option to bind exposed ports to an ip address and port on the host: docker run -d -name web -p 10.12.0.117:80:80 larsks/simpleweb. docker run -p 80:8080 -v /home/ubuntu/docker-logs:/var/log:rw my/applicationĮvery container will get its own IP address. Then all your logs will end up in /home/ubuntu/docker-logs on your host. all logs to /var/log and mount this folder to my host machine. What I prefer is to write the logs to a certain directory, e.g. You can run also run docker logs to receive the Docker logs. You can run docker attach to attach to a certain container an see its stdout. It also shows you the ports your app is exposing. If you do not see your app, it is not running. To see all running containers run docker ps on your host. Note that the API is open to the world now! In a real scenario you would need to secure it in some way (e.g. To use the Docker remote API from another machine, I needed to open it explicitly: docker -H tcp://0.0.0.0:4243 -H unix:///var/run/docker.sock -d & The API is a REST-API with several binding for programming languages (at ). You can use it to see all running containers (which would be your use case, right?), inspect a certain container or start and stop containers. Remote APIĪs JimiDini said, one possibility is the Docker remote API. This is a tricky point, because the solution itself is short and simple, but in real life you don’t use the IP address of a Docker container unless you want to test or try something on an exceptional basis.įor the above reason, I think it’s useful to read the whole post, but in case you don’t have the time, here you have the one-liner to solve the issue.There are some possibilities to check whether your app is running. How do I get the IP address of a Docker container? tl dr I need to specify the address of the docker daemon in various containers. Each network also has a default subnet mask and gateway. The IP address is assigned from the pool assigned to the network, so the Docker daemon effectively acts as a DHCP server for each container. I used busybox to run an nslookup, and get this: server can't find 1.0.18.: NXDOMAIN. By default, the container is assigned an IP address for every Docker network it connects to. However, there seems to be no DNS name for the container host 172.18.0.1. Let’s shed some light on a questions that readers often ask me in email or comments. From inside a container, I can lookup other containers with containername.web.
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