Labels are powerful in that the runtime may inform driver behavior. CNM supports the notion of user-defined labels (defined using the - label flag), which are passed as metadata between libnetwork and drivers. A network is a uniquely identifiable group of endpoints that can communicate with each other.Ī final, flexible set of CNM constructs are options and labels (key-value pairs of metadata).
Endpoints join exactly one network, and multiple endpoints can exist within a single network sandbox. One end of the pair sits in the network sandbox, while the other sits in a designated network. Endpoint: A network interface that typically comes in pairs.Network Sandbox: Essentially the networking stack within a container, it is an isolated environment to contain a container’s network configuration.
Docker network plugins series#
The Container Network Model (CNM) is a specification proposed by Docker, adopted by projects such as libnetwork, with integrations from projects and companies such as Cisco Contiv, Kuryr, Open Virtual Networking (OVN), Project Calico, VMware and Weave.įigure 2: Containers being connected through a series of network endpoints. Plugin vendors also need to consider the relative ease by which plugins may be written for either of these two models. Finding the right metrics to determine the velocity of a project is tricky. Some perspectives have been formed on which model has a lower barrier to entry. When evaluating any technology, some important considerations are community adoption and support. Arguments can be made as to which one is easier to adopt than the next, or which one is less tethered to their benefactor’s technology. Networking is complex, and there are many ways to deliver functionality. There are two proposed standards for configuring network interfaces for Linux containers: the container network model (CNM) and the container network interface (CNI). An organizer of technology meetups and conferences, a writer, author, speaker, he is active in the tech community. Advanced and emerging technologies have been a consistent focus through Calcote’s tenure at Seagate, Cisco and Pelco.
Docker network plugins software#
Lee Calcote is an innovative thought leader, passionate about developer platforms and management software for clouds, containers, infrastructure and applications.
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