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Mount /var/lib/kubelet/pki on tmpfs #97868

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merged 1 commit into from Jan 14, 2021
Merged

Mount /var/lib/kubelet/pki on tmpfs #97868

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13 changes: 10 additions & 3 deletions cluster/gce/gci/configure-helper.sh
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Expand Up @@ -1515,9 +1515,6 @@ EOF
function start-kubelet {
echo "Start kubelet"

# TODO(#60123): The kubelet should create the cert-dir directory if it doesn't exist
mkdir -p /var/lib/kubelet/pki/

local kubelet_bin="${KUBE_HOME}/bin/kubelet"
local -r version="$("${kubelet_bin}" --version=true | cut -f2 -d " ")"
local -r builtin_kubelet="/usr/bin/kubelet"
Expand Down Expand Up @@ -2765,6 +2762,16 @@ function setup-kubelet-dir {
echo "Making /var/lib/kubelet executable for kubelet"
mount -B /var/lib/kubelet /var/lib/kubelet/
mount -B -o remount,exec,suid,dev /var/lib/kubelet

# TODO(#60123): The kubelet should create the cert-dir directory if it doesn't exist
mkdir -p /var/lib/kubelet/pki/

# Mount /var/lib/kubelet/pki on a tmpfs so it doesn't persist across
# reboots. This can help avoid some rare instances of corrupt cert files
# (e.g. created but not written during a shutdown). Kubelet crash-loops
# in these cases. Do this after above mount calls so it isn't overwritten.
echo "Mounting /var/lib/kubelet/pki on tmpfs"
mount -t tmpfs tmpfs /var/lib/kubelet/pki
}

# Override for GKE custom master setup scripts (no-op outside of GKE).
Expand Down