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+#chainhead_header is expected momenterarily to be ahead. If its considerably ahead (e.g more than 5 blocks), then the node is definitely out of sync.
+ template: geth_chainhead_diff_between_header_block
+ on: geth.chainhead
+ class: Workload
+ type: ethereum_node
+component: geth
+ every: 10s
+ calc: $chain_head_block - $chain_head_header
+ units: blocks
+ warn: $this != 0
+ delay: down 1m multiplier 1.5 max 1h