IMPORTANT: No additional bug fixes or documentation updates
will be released for this version. For the latest information, see the
current release documentation.
Simulate multi-component templates
editSimulate multi-component templates
editSince templates can be composed not only of multiple component templates, but also the index template itself, there are two simulation APIs to determine what the resulting index settings will be.
To simulate the settings that would be applied to a particular index name:
POST /_index_template/_simulate_index/my-index-000001
To simulate the settings that would be applied from an existing template:
POST /_index_template/_simulate/template_1
You can also specify a template definition in the simulate request. This enables you to verify that settings will be applied as expected before you add a new template.
response = client.cluster.put_component_template(
name: 'ct1',
body: {
template: {
settings: {
'index.number_of_shards' => 2
}
}
}
)
puts response
response = client.cluster.put_component_template(
name: 'ct2',
body: {
template: {
settings: {
'index.number_of_replicas' => 0
},
mappings: {
properties: {
"@timestamp": {
type: 'date'
}
}
}
}
}
)
puts response
response = client.indices.simulate_template(
body: {
index_patterns: [
'my*'
],
template: {
settings: {
'index.number_of_shards' => 3
}
},
composed_of: [
'ct1',
'ct2'
]
}
)
puts response
PUT /_component_template/ct1
{
"template": {
"settings": {
"index.number_of_shards": 2
}
}
}
PUT /_component_template/ct2
{
"template": {
"settings": {
"index.number_of_replicas": 0
},
"mappings": {
"properties": {
"@timestamp": {
"type": "date"
}
}
}
}
}
POST /_index_template/_simulate
{
"index_patterns": ["my*"],
"template": {
"settings" : {
"index.number_of_shards" : 3
}
},
"composed_of": ["ct1", "ct2"]
}
The response shows the settings, mappings, and aliases that would be applied to matching indices, and any overlapping templates whose configuration would be superseded by the simulated template body or higher-priority templates.
{
"template" : {
"settings" : {
"index" : {
"number_of_shards" : "3",
"number_of_replicas" : "0",
"routing" : {
"allocation" : {
"include" : {
"_tier_preference" : "data_content"
}
}
}
}
},
"mappings" : {
"properties" : {
"@timestamp" : {
"type" : "date"
}
}
},
"aliases" : { }
},
"overlapping" : [
{
"name" : "template_1",
"index_patterns" : [
"my*"
]
}
]
}