.. _containerCreation: .. toctree:: Creating Containers ___________________ Make sure you have gone through :ref:`installingVPP` on the system you want to create containers on. After VPP is installed, get root privileges with: .. code-block:: console $ sudo bash Then install packages for containers such as lxc: .. code-block:: console # apt-get install bridge-utils lxc As quoted from the `lxc.conf manpage <https://linuxcontainers.org/it/lxc/manpages/man5/lxc.conf.5.html>`_, "container configuration is held in the config stored in the container's directory. A basic configuration is generated at container creation time with the default's recommended for the chosen template as well as extra default keys coming from the default.conf file." "That *default.conf* file is either located at /etc/lxc/default.conf or for unprivileged containers at ~/.config/lxc/default.conf." Since we want to ping between two containers, we'll need to **add to this file**. Look at the contents of *default.conf*, which should initially look like this: .. code-block:: console # cat /etc/lxc/default.conf lxc.network.type = veth lxc.network.link = lxcbr0 lxc.network.flags = up lxc.network.hwaddr = 00:16:3e:xx:xx:xx As you can see, by default there is one veth interface. Now you will *append to this file* so that each container you create will have an interface for a Linux bridge and an unconsumed second interface. You can do this by piping *echo* output into *tee*, where each line is separated with a newline character *\\n* as shown below. Alternatively, you can manually add to this file with a text editor such as **vi**, but make sure you have root privileges. .. code-block:: console # echo -e "lxc.network.name = veth0\nlxc.network.type = veth\nlxc.network.name = veth_link1" | sudo tee -a /etc/lxc/default.conf Inspect the contents again to verify the file was indeed modified: .. code-block:: console # cat /etc/lxc/default.conf lxc.network.type = veth lxc.network.link = lxcbr0 lxc.network.flags = up lxc.network.hwaddr = 00:16:3e:xx:xx:xx lxc.network.name = veth0 lxc.network.type = veth lxc.network.name = veth_link1 After this, we're ready to create the containers. Creates an Ubuntu Xenial container named "cone". .. code-block:: console # lxc-create -t download -n cone -- --dist ubuntu --release xenial --arch amd64 --keyserver hkp://p80.pool.sks-keyservers.net:80 If successful, you'll get an output similar to this: .. code-block:: console You just created an Ubuntu xenial amd64 (20180625_07:42) container. To enable SSH, run: apt install openssh-server No default root or user password are set by LXC. Make another container "ctwo". .. code-block:: console # lxc-create -t download -n ctwo -- --dist ubuntu --release xenial --arch amd64 --keyserver hkp://p80.pool.sks-keyservers.net:80 List your containers to verify they exist: .. code-block:: console # lxc-ls cone ctwo Start the first container: .. code-block:: console # lxc-start --name cone And verify its running: .. code-block:: console # lxc-ls --fancy NAME STATE AUTOSTART GROUPS IPV4 IPV6 cone RUNNING 0 - - - ctwo STOPPED 0 - - - .. note:: Here are some `lxc container commands <https://help.ubuntu.com/lts/serverguide/lxc.html.en-GB#lxc-basic-usage>`_ you may find useful: .. code-block:: console $ sudo lxc-ls --fancy $ sudo lxc-start --name u1 --daemon $ sudo lxc-info --name u1 $ sudo lxc-stop --name u1 $ sudo lxc-destroy --name u1