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renshuki/logstash-output-elasticsearch-bulk-request-size-monitoring.md

Created June 25, 2021 06:03
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Logstash - output.elasticsearch bulk requests size monitoring hack
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logstash-output-elasticsearch-bulk-request-size-monitoring.md

Command:

tcpdump -A 'tcp port 9200 and (tcp[((tcp[12:1] & 0xf0) >> 2):4] = 0x504f5354)' -i lo0 | egrep -A 5 -i "POST /_bulk"

Expected output (w/ Content-Length):

...U...5POST /_bulk HTTP/1.1
Connection: Keep-Alive
Content-Type: application/json
Content-Length: 173
Host: localhost:9200
User-Agent: Manticore 0.6.4
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