Adding a shutdown script that would enable handling preemptible VM terminations gracefully in GCP environment

Signed-off-by: Vishnu kannan <vishnuk@google.com>
This commit is contained in:
Vishnu kannan 2018-05-24 17:05:22 -07:00
parent 420071d86e
commit 9475292cd8
3 changed files with 25 additions and 0 deletions

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@ -28,6 +28,7 @@ release_filegroup(
"configure.sh",
"master.yaml",
"node.yaml",
"shutdown.sh",
],
visibility = ["//visibility:public"],
)

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@ -28,6 +28,7 @@ function get-node-instance-metadata {
metadata+="gci-update-strategy=${KUBE_TEMP}/gci-update.txt,"
metadata+="gci-ensure-gke-docker=${KUBE_TEMP}/gci-ensure-gke-docker.txt,"
metadata+="gci-docker-version=${KUBE_TEMP}/gci-docker-version.txt,"
metadata+="shutdown-script=${KUBE_ROOT}/cluster/gce/gci/shutdown.sh,"
metadata+="${NODE_EXTRA_METADATA}"
echo "${metadata}"
}

23
cluster/gce/gci/shutdown.sh Executable file
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@ -0,0 +1,23 @@
#!/usr/bin/env bash
# Copyright 2016 The Kubernetes Authors.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# A script that let's gci preemptible nodes gracefully terminate in the event of a VM shutdown.
preemptible=$(curl "http://metadata.google.internal/computeMetadata/v1/instance/scheduling/preemptible" -H "Metadata-Flavor: Google")
if [ ${preemptible} == "TRUE" ]; then
echo "Shutting down! Sleeping for a minute to let the node gracefully terminate"
# https://cloud.google.com/compute/docs/instances/stopping-or-deleting-an-instance#delete_timeout
sleep 30
fi