alertmanager: Avoid breaking /api/v1/alerts if legacy prefix is empty #3905
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If the legacy prefix is an empty string, it's interpreted as a handler for
/*
. Any handlers added afterwards are silently ignored, so requests to/api/v1/alerts
are routed to the legacy handler, rather than toam.*UserConfig
as would be expected. Meanwhile any handlers added BEFORE the/*
legacy handler still work as expected - making this very difficult to debug!Signed-off-by: Nick Parker nick@nickbp.com
What this PR does:
Which issue(s) this PR fixes:
Fixes #
Checklist
CHANGELOG.md
updated - the order of entries should be[CHANGE]
,[FEATURE]
,[ENHANCEMENT]
,[BUGFIX]