Albin Kerouanton
5295e88ceb
Commit8b7af1d0fadded some code to update the DNSNames of all endpoints attached to a sandbox by loading a new instance of each affected endpoints from the datastore through a call to `Network.EndpointByID()`. This method then calls `Network.getEndpointFromStore()`, that in turn calls `store.GetObject()`, which then calls `cache.get()`, which calls `o.CopyTo(kvObject)`. This effectively creates a fresh new instance of an Endpoint. However, endpoints are already kept in memory by Sandbox, meaning we now have two in-memory instances of the same Endpoint. As it turns out, libnetwork is built around the idea that no two objects representing the same thing should leave in-memory, otherwise breaking mutex locking and optimistic locking (as both instances will have a drifting version tracking ID -- dbIndex in libnetwork parliance). In this specific case, this bug materializes by container rename failing when applied a second time for a given container. An integration test is added to make sure this won't happen again. Signed-off-by: Albin Kerouanton <albinker@gmail.com> (cherry picked from commit80c44b4b2e) Signed-off-by: Albin Kerouanton <albinker@gmail.com>
libnetwork - networking for containers
Libnetwork provides a native Go implementation for connecting containers
The goal of libnetwork is to deliver a robust Container Network Model that provides a consistent programming interface and the required network abstractions for applications.
Design
Please refer to the design for more information.
Using libnetwork
There are many networking solutions available to suit a broad range of use-cases. libnetwork uses a driver / plugin model to support all of these solutions while abstracting the complexity of the driver implementations by exposing a simple and consistent Network Model to users.
Contributing
Want to hack on libnetwork? Docker's contributions guidelines apply.
Copyright and license
Code and documentation copyright 2015 Docker, inc. Code released under the Apache 2.0 license. Docs released under Creative commons.