Docker Plugin V2 does not expose a plugin name to the plugin, so we
check for "net-plugin" within driver name of a network to detect
whether network is ours.
- "noDNS" controls whether upon ContainerStarted event a container
should be registered within the Weave DNS.
- "isPluginV2" will be used to determine a path to host's /proc.
This simplifies the following:
- plugin-v2 does not need to start "plugin" as a separate process, thus
Docker is able to properly restart plugin-v2 in a case of any child
process failing.
- No need for weaveplugin container.
plugin is enabled by default when running "weave launch". when starting
only the router, you should pass "--plugin" parameter to enable it.
The env var WEAVE_NO_PLUGIN is no more.