Exit code 143 proved the previous job killed itself: the script's own cmdline contains the
string 'kube-apiserver', so it matched its own process. Matching comm (== 'kube-apiserver')
and skipping $$ removes that failure mode. Staggered 2 minutes apart.
Static pods survive mirror-pod deletion, so the first bootstrap job had no effect.
These jobs share the host PID namespace and SIGTERM the kube-apiserver process itself,
staggered by 100s so only one control plane restarts at a time.
rock