Skip to main content

How to assign static public IP to the docker container  


In this post, we will create a docker container and configure the static public IP so it will be reachable from outside. Here we will use the Linux  MAC VLANs and Virtual Ethernets.

Prerequisites:  
  • Ubuntu host up and running.
  • Public IP should be configured.
  • Docker should be installed.
Skip to end of metadata

PULL UBUNTU DOCKER IMAGE

$ docker pull  ubuntu:14.04.5
It will download the Ubuntu docker image.


Create a container
$ docker run -ti --name container-1  --net=none --privileged=true ubuntu:14.04.5 bash
This will create a docker container, now we will configure the static public ip to the container.

ASSIGNING AN IP FOR A CONTAINER

Here I am assuming that host machine is having interface "eth0" with public IP configured. Name of the container is container-1. The below steps needs to be performed on the docker host.

  • Create a virtual interface

    $ ip link add name veth0 link eth0 type macvlan mode bridge
     New virtual interface "veth0" will be created.

  • Get the process id for the salt master container

    $ docker inspect -f '{{.State.Pid}}' container-1
  • $ mkdir -p /var/run/netns

    $ ln -s /proc/<processid>/ns/net /var/run/netns/<processid>

  • Assign the virtual interface to container-1

    $ ip link set veth0 netns <processid> name eth0
Here a new interface eth0 will be created inside the container.

Note: If your ubuntu host machine is running in the EXS then verify the below network setting in the ESX. 
  • Promiscuous Mode , MAC Address Changes and Forged Transmits should be accepted mode.




If any one of them is not set to accept then change it in the ESX network setting (Host -> Configuration ->Networking->Properties->Edit)

  • Here I will use the dhclient to get the public static IP. If you are not having DHCP server configured then you can manually assign the IP to the interface.

    $ docker exec -it container-1 dhclient -v eth0


Now you have successfully configured the static public IP to the docker container.

Here we have used the concept of MAC VLANs and Virtual Ethernets so whenever you will shutdown/stop the container that IP will be lost. It means whenever you will start the container you have to configure the IP again.

If you have used the dhclient to get the static public IP for the container then getting the same IP again is little bit tricky. Check out this guide to get the same IP from DHCP server to the docker container.

Comments

Post a Comment

Popular posts from this blog

Running Salt Master In Docker Container From Scratch  In this post, we will install salt master in docker container and configure the public IP so it will be reachable from outside. Prerequisites:     Ubuntu host up and running. Public IP should be configured. Docker should be installed. Skip to end of metadata Go to start of metadat Pull Ubuntu docker image $  docker pull   ubuntu:14.04.5 It will download the Ubuntu docker image. Create a container for salt master $  docker run -ti --name salt-master-server   --net=none --privileged=true ubuntu:14.04.5 bash This will create a container, we will use the same container to install salt master. Now configure the network for this container. Assigning an IP for a container Here I am assuming that host machine is having interface "eth0" with public IP configured.  Name of the container is salt-master-server.  The below steps needs to be per...
Post a Comment
Read more
How To Run Salt-Master In Docker Container In this post we will use a Ubuntu based docker image in which I have already installed the salt-master and  uploaded it into docker hub. If you are looking for installing the salt-master in docker container from scratch then check out  this guide . Here I am assuming that you are having Ubuntu host up and running with public IP configured on it. Skip to end of metadata Go to start of metadata Pull the docker image $ docker pull yogeshprasadkurmi/ubuntu-salt-master This is a Ubuntu 14.04.5 based image with salt-master installed on it. Salt-master will be up and running if you create the container using this images. Create Salt-master Server $ docker run -ti --name salt-master-server  --net=none --privileged=true yogeshprasadkurmi/ubuntu-salt-master bash This will create a container with salt-master installed on it. Assigning an IP for a container Here I am assuming that host m...
Post a Comment
Read more

Citizenship Amendment Act

The Citizenship Amendment Bill has now become the Citizenship Amendment Act.  Protests Against It There have been massive protests against it in different corners of the country In Assam,   in the rest of the north eastern states, in West Bengal, Kerala, Karnataka, Uttar Pradesh, and even in Delhi, protests took place Most of the protests were non violent and peaceful but violence erupted in some places like the West Bengal, where a train was set on fire For instance in   Delhi, where some buses were set on fire. Appeal to Peoples  I'd like to say that, all the people who are protesting, you need to be extra sure to ensure that all the protests remain non-violent because you are going to gain nothing out of setting fire to public property What will happen is that, when any protest turns violent, you will not only lose public support but the government will get another excuse to use the police force against you more brutally, to attack you, to fi...
Post a Comment
Read more