Configure virtualbox data center which uses ubuntu 20.04

In this blog, I will show how to configure network in ubuntu 20.04 to create a small data center with virtualbox to simulate cloud vps in local development environment. The overall procedure is to, first, creating a virtual machine with 2 bridge network adapters attached. Then, making configuration for the network adapters with netplan. After that, cloning 2 more virtual machines and adjust the ip addresses in the network configuration.

Create a virtual machine and configure its network

  • Create new virtual machine and attach bridge network adapter to Adapter 1 and Adapter 2. Let's put the name for the machine as red



  • Find out what are the name of the network interfaces using command ip a
  • Then modify the file with content similar to below. Copy the content below to /etc/netplan/00-installer-config.yaml, then modify the ethernet interfaces to match with your virtual machine's interfaces. After that, run netplan apply for the new configuration to take effect.
  • network:
      ethernets:
        enp0s3:
          dhcp4: false
          dhcp6: false
        enp0s8:
          dhcp4: false
          dhcp6: false
      bridges:
        br0:
          interfaces: [enp0s3]
          addresses: [192.168.1.100/24]
          gateway4: 192.168.1.1
          mtu: 1500
          nameservers:
            addresses: [1.1.1.1, 8.8.8.8]
          parameters:
            stp: true
            forward-delay: 4
          dhcp4: no
          dhcp6: no
    
        br1:
          interfaces: [enp0s8]
          addresses: [10.0.0.100/24]
          gateway4: 10.0.0.1
          mtu: 1500
          nameservers:
            addresses: [10.0.0.1]
          parameters:
            stp: true
            forward-delay: 4
          dhcp4: no
          dhcp6: no
      version: 2
    

    In this set up, the first interface is in the same network with the host machine and can communicate with the internet (public network). The second network is for communicating among the virtual machines only (private network).

Clone more machines and adjust the ip addresses

Now clone the red macine into blue and green machine. Then change the addresses from 192.168.1.100 and 10.0.0.100 to 192.168.1.101 and 10.0.0.101 and 192.168.1.102 and 10.0.0.102. After all, you can ping between virtual machines using either address and ping to address on the internet from the virtual machines. The below pictures show the steps to clone a machine. 

 





Now, I hope that you enjoy this little data center and can have fun experiment installing tools such as Kubernetes or Apache Spark cluster


- ninjahoahong

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