renstur@coopnet:~/blog$ ls -lt ./topics/checkmk/
checkmk/
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Monitoring every box with Checkmk over NetBird
Checkmk over a NetBird overlay paged me for every tunnel blip because my checks were sized for a LAN. Four check attempts with a 1 minute retry, ping levels of 2 and 5 seconds, and looser error levels on the wt0 interface turned constant noise into alerts worth reading.
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The Checkmk REST API turned off TLS checks on my alert webhook
I used the Checkmk REST API to keep TLS verification on for my alert webhook. It pointed the rule at a new parameter set with ignore_ssl in it, and the plugin skips verification whenever that key exists. I fixed it in the .mk files and now grep for ignore_ssl after every scripted change.