Hello all,
As we heavily use Elasticsearch in our company, with some support from Elastic
company, I'd like to share with about index and template. Here is the starting
template I use:
{
"<template_name>": {
"template": "<sensor>_index_*",
"settings": {
"index": {
"number_of_shards": "1",
"number_of_replicas": "1"
}
},
"mappings": {
"_default_": {
"dynamic_templates": [
{
"strings_as_keywords": {
"match_mapping_type": "string",
"mapping": {
"type": "keyword"
}
}
}
],
"properties": {
"timestamp": {
"type": "date"
},
"@version": {
"type": "text"
},
"ip_dst_addr": {
"type": "ip"
},
"ip_src_addr": {
"type": "ip"
},
"metron_alert": {
"type": "nested"
}
}
}
},
"aliases": {}
}
}
Of course, replace the red parts with your config.
What we do here is to start with shard = 1, instead of shard = 5, which is the
default, and a really bad default according to Elastic support. If you have
small indices and a lot of shards, you will kill your Elastic performances.
Regarding fields type:
- We set the default to "keyword" as "string" is now deprecated
- We specialize all the non-string fields with their real type. The
"ip" is really useful, it allows CIDR usage in queries
- The metron_alert one is needed, otherwise the different GUI exhibits
some errors.
I hope this helps
Stéphane
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