upstream: handle health check fail after removal#6765
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mattklein123 merged 8 commits intomasterfrom May 1, 2019
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When using active health checking, hosts are not removed from
dynamic clusters if they are still passing health checks. This
creates a situation in which hosts might not be removed for a
very long time if the sequence is reversed; removal followed by
health check failure. This change handles the second case so that
any time a host is both removed AND failing active health check,
in any order, it will be removed.
This has been an issue "forever" but is more obvious when using
streaming EDS or very long polling DNS.
Fixes #6625
Signed-off-by: Matt Klein mklein@lyft.com
Risk Level: Medium/High. Scary stuff.
Testing: New unit tests.
Docs Changes: N/A
Release Notes: N/A