weave-scope

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Alban Crequy 9c53653997 EbpfTracker: restart it when it dies

EbpfTracker can die when the tcp events are received out of order. This
can happen with a buggy kernel or apparently in other cases, see:
https://github.com/weaveworks/scope/issues/2650

As a workaround, restart EbpfTracker when an event is received out of
order. This does not seem to happen often, but as a precaution,
EbpfTracker will not restart if the last failure is less than 5 minutes
ago.

This is not easy to test but I added instrumentation to trigger a
restart:

- Start Scope with:
    $ sudo WEAVESCOPE_DOCKER_ARGS="-e SCOPE_DEBUG_BPF=1" ./scope launch

- Request a stop with:
    $ echo stop | sudo tee /proc/$(pidof scope-probe)/root/var/run/scope/debug-bpf

2017-08-17 16:39:27 +02:00

procspy

ensure connections from /proc/net/tcp{,6} get the right pid

2017-06-25 10:59:58 +01:00

connection_tracker.go

EbpfTracker: restart it when it dies

2017-08-17 16:39:27 +02:00

conntrack_internal_test.go

probe: conntrack: fix output parsing

2017-01-17 19:30:56 +01:00

conntrack.go

Add eBPF connection tracking without dependencies on kernel headers