First, Go to Docker website to download Docker Desktop for Mac (link) Second, once the download is completed, double-click to install it, and drag the Docker.app into the Applications folder (see screenshot below) Then, go to your Applications Folder and click on the Docker Whale icon.
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Am not well versed with Unix networking, adding virtual interfaces etc, trying to learn it now. We are trying to dockerize our application.My requirement is: To assign an ip to a docker container which is accessible from an external application/browser.The container ip should be pingable from a different computer in the same network basically.I don't want to use port forwarding.I want to access a docker container just like we access a VM using an ipaddress. Without the port mapping, -p flag. If i run any server like Apache or Tomcatinside the container, it should be accessible using the container ip andport. For example:Is this possible in docker?.Running ifconfig on my Unix box(RHEL 7.1) shows docker0, ens,lo and veth interfaces. There is no eth0.
Kind of confused on this. I struggled to get that functionality, and I will share my experience and what I did to get exactly what you need. The short answer:You need to create your own bridge, connect your host's physical network interface to that bridge, and as well connect the virtual interfaces of each container you want to behave like a normal bridged vritual machine in your network, and then make the container chooses its own IP address when it starts. The detailed answer:Creating Persistence Network BridgeThe Bridge, is a device (in our case virtual device), which behaves similar to network swiches (operates mainly on network layer 2), i.e., it can connect two or more network interfaces to be on the same local area network (LAN) if they have the same subnet.You are going to create new persistence bridge br0 (it will get started automatically on system boot), add your physical network interface into it (in my case it is eth0). Note that after you add your interface to the bridge, the interface doesn't need IP address anymore, because the bridge will get IP address and can be used instead of your interface, i.e., you can communicate using the bridge as if it were your physical interface and it will forward the in/out data packets to the correct destination.
You don't need to assign any hardware (MAC address) to the bridge, it will automatically take the MAC of the first added interface.Warning: It is highly recommended not to do these steps remotely except you have a physical access to your server! My current preferred approach with this is to use either the macvlan or ipvlan Docker network driver. I prefer macvlan as each container can have its own MAC address but some things like VMware don’t like having multiple Mac addresses for a single virtualized nic and won’t route traffic properly.Setup is pretty straight forward. First you need to determine a few things. Subnet of your main network. Using 10.0.0.0/24 for this example.
Gateway of your network. Using 10.0.0.1 for the example. IP range to use for allocating the ips from (you can statically assign ips outside this range when doing a Docker run if need be). For this example I will use 10.0.0.128/25. You will need a chunk of ips to let Docker manage so you will need to ensure these ips are not in use on your network. The name of the device you want to use for the traffic.
For the example I will use eth0. The name of the new Docker network you are going to create. Using “my net” for the example.Next you create a new Docker network like so: docker network create -d macvlan —-subnet 10.0.0.0/24 -ip-range 10.0.0.128/25 —-gateway 10.0.0.1 -o parent=eth0 mynetNow when you start containers use docker run —-network mynet.For more information see the docker docs:One caveat to this approach is that macvlan/ipvlan dont seem to work very well with Docker for Mac. The HyperKit vm it creates is a bit of a black box. The macvlan/ipvlan approach requires a more controlled network that Docker for Mac doesn't give you.
If you are trying to do this with Docker for Mac then I would suggest setting up a Docker Machine. The docs for how to do that are here:.In this scenario, unless you like setting up routing rules on your Mac, you should have the docker machine use a bridged interface that the macvlan/ipvlan network can then be attached to. In my experience the need for a second NIC that is NAT'ed through the MacOS host is unnecessary but you may find something otherwise.
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I just pushed up my version of the shim installer here. I chose not to contribute to your shim installer as my version works a little differently in terms of the architecture as it doesn’t bring up a docker network (this pollutes the iptables with forward blocking) which results in having to keep your containers on that networks subnet.
Instead it creates a full bridge allowing you to crHonestly the fact this issue hasn’t been fixed is ridiculous so I plan to make some waves with this package. Request to update docs here:docker/docker.github.io#3922Please upvote and comment your support so that this issue gets the attention it deserves.
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January 2023
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