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kubernetes: better tolerate bad contents of /etc/kubeadm/kube-system.init/

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Specifically ignore present-but-empty files entirely and ignore (but log)
failure to apply any one file.

Ignoring an empty file is useful because it means you can clobber a file which
might be referenced from an images binds without needing to override those
binds (since that generally means duplicating the whole lot which is annoying).

Ignoring any failures to apply means the rest gets applied and the rest of the
script (including untaint and the stamp file creation) still happen, resulting
in a system where the admin just has to address the failures rather than the
remaining updates. We touch a file to indicate failure generally plus one to
indicate the specific yaml which failed to apply.

Signed-off-by: Ian Campbell <ijc@docker.com>
This commit is contained in:
Ian Campbell 2017-11-09 11:02:12 +00:00
parent 581cbdd1e8
commit 425553d390
1 changed files with 12 additions and 2 deletions
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14
projects/kubernetes/kubernetes/kubeadm-init.sh
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@ -11,9 +11,19 @@ else
kubeadm init --skip-preflight-checks --kubernetes-version @KUBERNETES_VERSION@ $@
fi
for i in /etc/kubeadm/kube-system.init/*.yaml ; do
n=$(basename "$i")
if [ -e "$i" ] ; then
echo "Applying "$(basename "$i")
kubectl create -n kube-system -f "$i"
if [ ! -s "$i" ] ; then # ignore zero sized files
echo "Ignoring zero size file $n"
continue
fi
echo "Applying $n"
if ! kubectl create -n kube-system -f "$i" ; then
touch /var/lib/kubeadm/.kubeadm-init.sh-kube-system.init-failed
touch /var/lib/kubeadm/.kubeadm-init.sh-kube-system.init-"$n"-failed
echo "Failed to apply $n"
continue
fi
fi
done
if [ -f /var/config/kubeadm/untaint-master ] ; then