Commits on Jul 6, 2021

1. Fix flakiness in Kind e2e flow aggregator tests …

   - Flows are not getting expired as expected because of zero start time and
   last export time is initialized as start time.This commit fixes that bug by
   adding current time as start time if it is zero when a new connection is added.
   
   - Idle flow export timeout is not configured properly in the e2e test.
   There is a bug in the test and this commit fixes that.
   
   - The expected number of records is not correct in Kind clusters
   as packet counters are not supported in conntrack entries for
   OVS userspace datapath. Flow exporter cannot send records after
   active timeout expiry as we cannot consider flows to be active
   without the statistics. Therefore, we expect only 2 records for any
   given flow in Kind clusters and 3 flow records in other clusters.
   We expect this limitation to be resolved soon when OVS
   userspace datapath support statistics in conntrack entries.
   
   - Additionally, we consider source port from iperf flows to ignore other
   similar flow records from the iperf control flows. Because of this we
   were passing the tests in Kind clusters even though there are only two flow
   records.
   
   - Kubectl logs command with since option is not outputting the logs of
   ipfix collector as expected and this causes intermittent failures. Removing
   the since option as we have source port as the gating parameter when processing
   flow records.
   
   Signed-off-by: Srikar Tati <stati@vmware.com>

   

   srikartati committed Jul 6, 2021
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