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Caddy Reverse Proxy Down
critical

Description All Caddy reverse proxies are down
Query for 0m 
>>>
	
				
					
					
						count
					
				
			
				
					(
				
			
				
					
				
			
				
					) by (upstream) == 0
Query Explanation

The query counts the number of healthy upstream targets (caddy_reverse_proxy_upstreams_healthy) for each upstream label and fires when that count is exactly 0, meaning none of the upstreams for a given Caddy reverse proxy are healthy. The alert triggers when all reverse‑proxy upstreams are down.

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