Networking

Currently, ops supports two networking modes; usermode and bridged. In this document we will dive into the differences between these networking modes and when it makes sense to select one over the other.

Usermode Network

Usermode is the default and simplest mode of networking. It utilizes the ready available network connection and shares it with the ops instance.

It is worth noting that the simplicity of usermode does come at a performance cost. Therefore, while usermode is a good option for demos, testing, and local development; it may not be a good choice for production environments.

No action is required to configure usermode networking, it is used by default.

Bridged Network

Bridged networking connects a virtual machine to a network using the host computer's Ethernet adapter. For more information about bridged networking, see this article.

In addition to that, KVM hardware acceleration can only be achieved while utilizing this networking mode. Because of this, having an Ethernet connection is required to setup this networking mode.

If you attempt to set it up without it, you may see your SSH session be terminated or see an error like "no DHCP packet received within 10s".

To setup bridged networking, use the following command...

$ sudo ops net setup

To tear down a networking bridge, use the following command...

$ sudo ops net reset

Enabling bridge for an instance

Once you have setup a networking bridge, you need to specify in your ops run and ops load command to utilize that bridge. To do so, pass the flag -b.