Missing edge between containers in host networking namespace

[2opremio]

To reproduce, launch scope (master, without weave network) and then.

In one terminal:

docker run --net=host --rm --name=httpd python:2.7 python -m SimpleHTTPServer

In a different terminal:

docker run --net=host --rm --name=httpclient tutum/curl bash -c 'while true; do curl -s localhost:8000; sleep 1;  done'

What I see:

Report: report_missing_host_connection.json.gz

What I expect: An edge between the httpd and httpclient containers.

(Changing localhost:8000 to external_interface_ip:8000 doesn't help either).

The process view doesn't wither show connected processes.

[2opremio]

Related: #1162 ? (weave wasn't running here though)

[2opremio]

I am also missing an edge when connecting a container in the weave network to a container in the host network using weave expose (this happened when doing a workshop at a client). I am not creating a new issue since it seems a duplicate, but let's have this in mind when fixing it.

To reproduce, in one terminal:

docker run --net=host --rm --name=httpd python:2.7 python -m SimpleHTTPServer

In another terminal:

weave launch
weave expose -h host.weave.local
eval $(weave env)
docker run --rm --name=httpclient tutum/curl bash -c 'while true; do curl -s host.weave.local:8000; sleep 1;  done'

And then launch Scope.

This is what I see:

Report: report_missing_host_connection_with_weave_expose.json.gz

[2opremio]

After a discussion with @tomwilkie offline, this is caused by a limitation on how we track short-lived connections.

I have created #1260 to track this instead.