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57 lines
1.5 KiB
Bash
57 lines
1.5 KiB
Bash
#!/usr/bin/env bash
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# vim:ts=4:sts=4:sw=4:et
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#
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# Author: Hari Sekhon
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# Date: 2019-11-21 16:02:54 +0000 (Thu, 21 Nov 2019)
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#
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# https://github.com/HariSekhon/DevOps-Bash-tools
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#
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# License: see accompanying Hari Sekhon LICENSE file
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#
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# If you're using my code you're welcome to connect with me on LinkedIn and optionally send me feedback to help steer this or other code I publish
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#
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# https://www.linkedin.com/in/HariSekhon
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#
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set -euo pipefail
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[ -n "${DEBUG:-}" ] && set -x
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usage(){
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echo "
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Checks GCE Metadata API for the preemption status and returns preempted / not preempted and 0 or 1 exit code
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Can combine in a shutdown script to do something different if preempted vs a normal shutdown
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https://cloud.google.com/compute/docs/instances/create-start-preemptible-instance
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https://cloud.google.com/compute/docs/shutdownscript
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usage:
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${0##*/}
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"
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exit 3
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}
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if [ $# -ne 0 ]; then
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usage
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fi
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#if ! curl -sS --connect-timeout 2 -H "Metadata-Flavor: Google" "http://metadata.google.internal/computeMetadata/v1/" &>/dev/null; then
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# echo "This script must be run from within a GCE instance as that is the only place the GCP GCE Metadata API is available"
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# exit 2
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#fi
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if output="$(curl -sS -H "Metadata-Flavor: Google" "http://metadata.google.internal/computeMetadata/v1/instance/preempted")"; then
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if grep -q TRUE <<< "$output"; then
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echo "preempted"
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exit 0
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else
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echo "not preempted"
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exit 1
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fi
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else
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echo "FAILED to query GCE Metadata API, not running inside GCE?"
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exit 2
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fi
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