Make annotation service alert fire only when all instances are down #872
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stephen-soltesz
approved these changes
Feb 1, 2022
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Reviewed 1 of 1 files at r1.
Reviewable status:complete! 1 of 1 approvals obtained
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nice.
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Fix alert misfire.
Before: https://prometheus.mlab-oti.measurementlab.net/graph?g0.expr=up%7Bservice%3D%22annotator%22%7D%20%3D%3D%200%20or%20absent(up%7Bservice%3D%22annotator%22%7D)&g0.tab=0&g0.stacked=0&g0.show_exemplars=0&g0.range_input=4d
After: https://prometheus.mlab-oti.measurementlab.net/graph?g0.expr=sum(up%7Bservice%3D%22annotator%22%7D)%20%3D%3D%200%20or%20absent(up%7Bservice%3D%22annotator%22%7D)&g0.tab=0&g0.stacked=0&g0.show_exemplars=0&g0.range_input=4d
This change is