I am running docker containers from MaxOS(docker for mac). I have setup a bridge network for these containers. Each of them has its own hostname and they can connect to each other through the hostname. Now I want to connect to these containers from my host os which is Mac by their hostname. How can I do that? I only know that I can bind port number to my host os but I don't know how to access these containers by their hostname.
I know that I can attach the container by docker command like below:
docker exec -it $INSTANCE_NAME /bin/bash
But I want to access it through network.
Related
Right now, when I bind a docker container port to a port on my computer, it can be accessed through every IP address belonging to my computer.
I know this since I tried connecting to the port through another computer using my Docker host's static LAN ip address.
I want to restrict that specific container to be accessible exclusively by my docker host (127.0.0.1 or localhost). When I change my web server's IP to localhost, it becomes inaccessible from my docker host (probably because that makes it local to the container, not the host).
How can I make a docker container local to the host?
If you run the container like this it will be accesable only from 127.0.0.1
docker run --rm -it -p 127.0.0.1:3333:80 httpd
--rm: I use it for testing it removing the container after exit.
-it: interactive tty.
-p: port mapping, map 3333 on the host to 80 in the container and restrict access only from localhost.
The docker-compose equivalent would be:
services:
db:
ports:
- "127.0.0.1:80:80"
I have a docker container and a virtual machine(VM) on the same host(OpenSUSE). the docker has the IP like 172.18.0.2 and the host IP is something like 3.204.XX.XX and VM IP is also something like 3.204.xx.xx, I am able to ping the docker from the host and even the VM is pingable from the host and vice-versa but I am unable to ping the docker from the Virtual machine present on the same host. Is there a way to access the docker on the host from the VM present on the same host? please help.
it is not possible directly because docker creates its bridge "bridge0" all the traffic is been routed using nat, where as virtualbox also creates its own bridge/interface , because of which its not able to access. But you can access by exposing port.
above mention requirement is possible with consul service discovery and host n/w config modification
How to access or connect to a process running on docker on host A from a remote host B
consider a Host A with ip 192.168.0.3 which is running a application on docker on port 3999 .
If i want to access that application from remote machine with IP 192.168.0.4 in same subnet.
To be precise i am running Kafka producer on the server and i am trying to receive using Kafka-console-Consumer.
Use --net=host to run your container and it'll use the host's network stack, then you can connect to the application running inside container like it's running on host directly.
Port mapping, use option -p to map the port inside your container to a port of your host. e.g. docker run -d -p <container port>:<host port> <image>, then you can connect to <host>:<host port> to connect your application inside container
Docker's built-in multi-host network. In early releases the network driver is isolated from docker's core, you have to use 3rd party tools like flannel or weave for multi-host connection, but from release 1.9, it has been merged into docker. You can follow it's guide to set it up.
Hope this is helpful :-)
First you need to bind docker container's port to the Host A:
docker run -d -p 3999:3999 kafka-producer
Then you need to access Host A from Host B using IP:Port
192.168.0.3:3999
I have two containers say container1 and container2 running in same machine. I know i can communicate between both the container using link alias option. I have a scenario where i want to communicate between 2 containers using the IP address of the host machine. I have a property file in container1 where i need to provide the ip address of the container2 (Here i have to provide the ip address and not hostname of container). Everytime when i restart the container, the container ip gets changed. so is there any way to map the ip address of the host machine to link between container ?
Please check this doc which describes how to create docker network and assign IP address and range to docker container. In case of lack of time use commands below:
docker network create --subnet=192.168.0.0/16 docnet0
docker run --net docnet0 --ip 192.168.0.10 -it "your_docker_image" bash
I want to be able to access a docker container via its Ip eg the one I can see when I do docker container inspect foo
The reason is I am using zookeeper inside a docker container that is managing two other docker containers running solr. My code (not in docker and I don't at this stage want it to be) calls zookeeper to get the urls of the solr servers which zookeeper reports as the docker containers ip. My code then falls over because calling the docker containers ip from the host fails as it should be calling localhost.
So how can I allow a call to the docker containers ip from the host to be routed correctly. (I am using Docker native for Mac)
I'm not using Docker for Mac, so I'm not sure the newest version Docker for Mac is still based on Docker-machine (which based on VirtualBox) or not.
If you can confirm your Docker for Mac is based on VirtualBox, then you probably could get the inet IP of vboxnet0 network interface via ifconfig command. This IP should be used as your calling IP.
Besides, you should know the port number of your Zookeeper container. Normally the exposed port of a container could be configured in docker run command, for example:
docker run -p 5000:5001 -i -t ubuntu /bin/bash
Where -p indicated the exposed port of the container.