Lab catalog
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Availability and p95 from the log A script that computes the site availability and the 95th percentile of the response time from the nginx log for any time window — one command for an SLI instead of a pipeline typed from memory.~30 min not started
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The site broke after a release After the latest release the bookshop answers error 500 at every address. Put the site back on the previous working release without the visitors noticing the switch, and keep the failed release for the review.~20 min not started
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Event intake has stalled and restarts are off-limits Under load the event intake service can no longer save events to its volume and keeps them in memory, and a restart would lose them. Get the space back without a restart and make sure the service log never eats the volume again.~30 min not started
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Every other request hangs The shop site answers every other time — every other request hangs until the client gives up. One of the two backends is down, and backends will keep going down. Make the load balancer on node1 withstand it.~30 min not started
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The site address does not move to the standby machine The shop site lives on a floating address that node2 should pick up if node1 goes down. During a drill node1 was switched off, and the site vanished. Make the address and the site move to node2 and come back.~30 min not started
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