This is a new thing in Kubernetes 1.14. Added some details
about it (TL,DR it helps with cluster scalability but you
don't even have to know/care about it).
1) When introducing "kubectl describe", we ask people to
look at "kubectl describe node node1", which shows
them a bunch of pods. This makes it easier to contrast
with the (empty) output of "kubectl get pods" later.
2) Then, instead of going straight to "-n kube-system",
we introduce "--all-namespaces" to show pods across
all namespaces. Of course we also mention "-n" and
we also explain when these flags can be used.
3) Finally, I rewrote the section about kube-public,
because it was misleading. It pointed at the Secret
in kube-public, but that Secret merely corresponds
to the token automatically created for the default
ServiceAccount in that namespace. Instead, it's
more relevant to look at the ConfigMap cluster-info,
which contains a kubeconfig data piece.
The last item gives us an opportunity to talk to the
API with curl, because that cluster-info ConfigMap is
a public resource.
This was discussed and agreed in #246. It will probably break a few
outstanding PRs as well as a few external links but it's for the
better good long term.
AJ BowenandJerome Petazzoni
Bridget KromhoutandGitHub