Disable dynamic mapping completely in Elasticsearch - elasticsearch

Question

I have an index template, from which I am creating an index
PUT /_index_template/example_template
{
"index_patterns": [
"example*"
],
"priority": 1,
"template": {
"aliases": {
"example":{}
},
"mappings": {
"dynamic":strict,
"_source":
{"enabled": false},
"properties": {
"SomeID":
{ "type": "keyword", "index" : true,"store":true,"ignore_above":5},
"firstName":
{ "type": "text", "index" : true,"store":true},
"lastName":
{ "type": "text", "index" : false},
"PersonInfo": {
"type": "object",
"dynamic":"true",
"properties": {
"FirstName": {
"type": "keyword",
"index": true,
"store": false
}
}
}
}
},
"settings": {
"index": {
"number_of_shards": 1,
"number_of_replicas": 3
}
}
}
}
As in the template mappings you can see I am making the dynamic as Strict, so that new fields cant be added to the mappings,
while on inner object, PersonInfo, I can set dynamic as true, which takes precedence and allow to insert a new field mapping.
PUT example10022021/_doc/1
{
"SomeID":"1234",
"firstName":"Nishikant",
"PersonInfo.service_data":"random"
}
Here service_data is getting added into mappings, as dynamic is true
"PersonInfo" : {
"dynamic" : "true",
"properties" : {
"FirstName" : {
"type" : "keyword"
},
"service_data" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
}
}
Is there any way to disable the dynamic mapping completely? like specifying globally?
Thanks!
Steps I took After #Val answer:
PUT /_index_template/example_template
{
"index_patterns": [
"example*"
],
"priority": 1,
"template": {
"aliases": {
"order":{}
},
"mappings": {
"dynamic": "strict",
"dynamic_templates": [
{
"objects": {
"match_mapping_type": "object",
"mapping": {
"dynamic": "strict"
}
}
}
],
"_source":
{"enabled": false},
"properties": {
"BillToID":
{ "type": "keyword", "index" : true,"store":true,"ignore_above":5},
"firstName":
{ "type": "text", "index" : true,"store":true},
"lastName":
{ "type": "text", "index" : false},
"PersonInfo": {
"type": "object",
"dynamic":true,
"properties": {
"FirstName": {
"type": "keyword",
"index": true,
"store": false
}
}
}
}
},
"settings": {
"index": {
"number_of_shards": 1,
"number_of_replicas": 3
}
}
}
}
then I create an index
PUT example10022021
then inserting a document
POST example10022021/_doc/1
{
"BillToID":"1234",
"firstName":"Nishikant",
"PersonInfo.service_data":"random"
}
this will result in 200OK, now if you check the mappings again
GET example10022021
in o/p you can see the dynamic field mapping getting added(this behavior I don't want),
"PersonInfo" : {
"dynamic" : "true",
"properties" : {
"FirstName" : {
"type" : "keyword"
},
"service_data" : {
"type" : "text",
"fields" : {
"keyword" : {
"type" : "keyword",
"ignore_above" : 256
}
}
}
}
}

Answer 1

What you can do is to create another index template that applies to all indexes, i.e. using the * name pattern:
PUT /_index_template/common_template
{
"index_patterns": [
"*"
],
"priority": 0,
"template": {
"mappings": {
"dynamic": "strict",
...
If you want to also restrict the creation of dynamic fields inside inner objects, you can leverage dynamic templates, like this:
PUT /_index_template/common_template
{
"index_patterns": [
"*"
],
"priority": 1000,
"template": {
"settings": {},
"mappings": {
"dynamic": "strict",
"dynamic_templates": [
{
"objects": {
"match_mapping_type": "object",
"mapping": {
"dynamic": "strict"
}
}
}
],
"properties": {
"test": {
"type": "object",
"properties": {
"inner": {
"type": "integer"
}
}
}
}
}
}
}
With the above index template, you can create a document like this one:
POST test/_doc/
{
"test": {
"inner": 1
}
}
But not like this one:
POST test/_doc/
{
"test": {
"inner": 1,
"inner2": 2 <--- this will not be allowed
}
}