Removing logstash indicies from elasticsearch‏

I’ve been playing with EFK and elasticsearch ended up eating all of the RAM on my test system. I discovered this was due to it attempting to cache all these indexes. Since this is a test system I’m not too bothered about having a long history here so I wrote this bash script to remove logstash indexes from elasticsearch, compress and archive them. This has the effect of reducing the memory pressure and a better working system. Explanatory comments are included.

#!/bin/bash
 
#######################################
# Author: Rhys Campbell               #
# Created: 2014-08-06                 #
# Description: Removes indicies with  #
# a modified date > N days from ES #
# memory and archives them using lzma #
# compression.                        #
#######################################
INDICIES_PREFIX="logstash"; # Indicies name prefix
INDICIES_ROOT="/data/elasticsearch/data/elasticsearch/nodes/0/indices/$INDICIES_PREFIX"; # Daily indicies root
DAYS=5; # Days of indexes to keep
ARCHIVE="/data/elasticsearch/data/elasticsearch/nodes/0/indices/archive"; # archive location
ES_URL="http://hostname:9200/";
 
logger -t elasticsearch "Begining archiving of elasticsearch indicies.";
 
for DIR in `find /data/elasticsearch/data/elasticsearch/nodes/0/indices/logstash* -maxdepth 0 -mtime +"$DAYS"`;
do
 # Remove index from elasticsearch
INDEX_NAME=`basename "$DIR"`;
REMOVAL_URL="$ES_URL$INDEX_NAME/_close";
#curl -XPOST "$REMOVAL_URL"; # Uncomment this line. Wordpess balks on this for some reason
EXIT=$?;
    if [ "$EXIT" -ne 0 ]; then
        logger -t elasticsearch "ERROR: Removal of elasticsearch index at $REMOVAL_URL failed Exit Code = $EXIT.";
        exit $EXIT;
    else
        logger -t elasticsearch "Successfully removed $REMOVAL_URL from elasticsearch.";
    fi;
    # Now archive the directory
    tar cvf "$DIR".lzma "$DIR" --lzma --remove-files;
    EXIT=$?;
    if [ "$EXIT" -ne 0 ]; then
        logger -t elasticsearch "ERROR: lzma compression of elasticsearch index file encountered an error. Exit Code = $EXIT.";
        exit $EXIT;
    else
        logger -t elasticsearch "Compressed elasticsearch index $INDEX_NAME successfully.";
    fi;
    mv "$DIR".lzma "$ARCHIVE";
    EXIT=$?;
    if [ "$EXIT" -ne 0 ]; then
        logger -t elasticsearch "ERROR: Could not move $DIR.lzma to archive location $ARCHIVE. Exit Code = $EXIT.";
        exit $EXIT;
    else
        logger -t elasticsearch "Removal and archiving of the elasticsearch index $INDEX_NAME completed successfully.";
    fi;
 
done
 
logger -t elasticsearch "Completed archiving of elasticsearch indicies.";

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