Delete old time-based indexes from ElasticSearch

es-delete-old-indexes.sh

#!/bin/sh

MAX_DAYS="30"
ES_ADDR="127.0.0.1"

D0="$(date -d "$MAX_DAYS days ago" +%s)"

curl -sS "http://$ES_ADDR:9200/_cat/indices" |
awk 'match($3, /-([0-9][0-9][0-9][0-9])[\.\-]([0-9][0-9])[\.\-]([0-9][0-9])$/, m) { printf "%s-%s-%s %s\n", m[1],m[2],m[3],$3 }' |
while read D1 idx; do
    D2="$(date -d "$D1" +%s 2>/dev/null || :)"

    test "$D2" = ""      && continue
    test "$D2" -ge "$D0" && continue

    result="$(curl -sS -X DELETE "http://$ES_ADDR:9200/$idx")"
    test "$result" = '{"acknowledged":true}' && continue
    echo "FAILED: $idx: $result"
    exit 1
done