创建 ILM 策略：
```
PUT _ilm/policy/logs_policy
{
"policy": {
"phases": {
"hot": {
"actions": {
"rollover": { "max_size": "50gb", "max_age": "7d" }
}
},
"warm": {
"actions": {
"shrink": { "number_of_shards": 1 },
"forcemerge": { "max_num_segments": 1 }
}
},
"delete": {
"min_age": "30d",
"actions": { "delete": {} }
}
}
}
}
```
创建索引模板与别名：
```
PUT _index_template/logs_template
{
"index_patterns": ["logs-*"] ,
"template": {
"settings": {
"index.lifecycle.name": "logs_policy",
"index.lifecycle.rollover_alias": "logs"
}
},
"priority": 500
}
PUT logs-000001
{
"aliases": {
"logs": { "is_write_index": true }
}
}
```
触发滚动：
```
POST logs/_rollover
```
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