Elasticsearch upstart sample for safe shutdown (for unattended security updates etc.)

elasticsearch-shutdown.conf

description "Elastic Search"

pre-stop script
    triesleft=3600
    while true
    do
        curl -s localhost:9200/_cluster/health?pretty | grep status | grep green > /dev/null
        exitcode=$?
        #echo $exitcode
        if [ $exitcode -ne 0 ]
        then
            echo "Status is not green."
            sleep 10
        else
            echo "Status is green."
            break
        fi

        triesleft=$((triesleft-1))
        if [ $triesleft -eq 0 ]
        then
            echo "Tried for an hour. Restarting anyway."
            break
        fi
    done
end script

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