docs/node-mixin/alerts: add max error condition to alert about desynchronized clock
alert: 'NodeClockNotSynchronising',
expr: |||
min_over_time(node_timex_sync_status[5m]) == 0
+ and
+ node_timex_maxerror_seconds >= 16
||| % $._config,
'for': '10m',
labels: {
