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NodeFilesystemAlmostOutOfSpace
warning

Description Filesystem on {{ $labels.device }} at {{ $labels.instance }} has only {{ printf "%.2f" $value }}% available space left.
Query for 1h 
>>>
	
				
					(
  
				
			
				
					
				
			
				
					{job="node",fstype!=""} / 
				
			
				
					
				
			
				
					{job="node",fstype!=""} * 100 < 5
and
  
				
			
				
					
				
			
				
					{job="node",fstype!=""} == 0
)
Query Explanation

The rule evaluates each mounted filesystem (with a non‑empty fstype) on every node, computes the free‑space percentage as node_filesystem_avail_bytes / node_filesystem_size_bytes * 100, and fires when this percentage is below 5 % and the filesystem is not read‑only (node_filesystem_readonly == 0). In short, the alert triggers whenever any writable filesystem on a node has less than 5 % available space.

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