I have created policy and applied policy on indices .
This policy allows us to set a expiry time for a document. Once the time has past, the expired documents are deleted.
Is it possible with latest version of Elasticsearch ?
As far as I know ILM deletes the entire index and criteria will be the duration of days since the index has been created. If you need to delete a specific document I feel you will need to leverage API to implement this. You can setup a cronjob which uses the below script to delete a specific doc.
curl -k -X POST "https://USERNAME:PASSWORD#localhost:9200/test/_delete_by_query?pretty" -H 'Content-Type: application/json' -d'
{
"query": {
"bool": {
"filter": [
{
"range": {
"#timestamp": {
"lt": "now-30d"
}
}
}
]
}
}
}
Reference : https://discuss.elastic.co/t/automatically-delete-older-documents/247078/9
I have a series of indexes in Elastic, myindex-YYYY.MM.DD. In a Grafana panel, I want to read data only from the latest such index each time. I have created a datasource [myindex-]YYYY.MM.DD with pattern Daily, but this reads from all indexes. I can't find out whether limiting to the latest index should be done in the data source or in the panel options.
An alternative could be to filter the documents so that I get only those whose #timestamp equals the max #timestamp, but I can't figure out this either. I can get the max #timestamp with this:
GET /myindex-*/_search
{
"size": 0,
"aggs": {
"max_timestamp": { "max": { "field": "#timestamp" } }
}
}
I’d need to save the result in a variable and use it in another query, but I can’t find a way to do this in Grafana.
My conclusion (from reading whatever I could find and from the absence of answers to this question) is that what I want is not possible to do directly. I ended up creating a myindex-latest alias to the latest of the myindex-YYYY.MM.DD series. I did this by running a script similar to the following (in my case it's being run by Logstash after creation of myindex-YYYY.MM.DD finishes):
#!/bin/bash
#
# This script creates elastic alias myindex-latest for the index
# myindex-YYYY.MM.DD, where YYYY.MM.DD is the current date.
curdate=`date +%Y.%m.%d`
read -r -d '' JSON <<EOF1
{
"actions": [
{
"remove": {
"index": "*",
"alias": "myindex-latest"
}
},
{
"add": {
"index": "myindex-$curdate",
"alias": "myindex-latest"
}
}
]
}
EOF1
curl -X POST \
-H "Content-Type: application/json" \
"http://es01:9200/_aliases" \
-d "$JSON"
I need to delete a large number of documents in a 5.5 Elasticsearch cluster. I know the optimal way to do this is to rebuild the cluster without the intended documents, but that's not possible in our case. I run the following query that deletes documents from a subset of the indexes in the cluster:
GET myindex_1*/doc_type/_delete_by_query
{
"query": {
"bool": {
"filter": [
{
"terms": {
"typeCode": [
"Filtered_Type"
]
}
}
],
"must": [
{
"range": {
"createdDateUTC": {
"lt": "2017-10-28"
}
}
}
]
}
}
}
It starts deleting documents for a couple of hours but then just stops and I have to kick it off again. Any ideas why it stops running the delete query?
Just a note, I'm using Kibana to run the query and the request times out on the client side when though I can see it continues deleting on the backend.
From here:
By default _delete_by_query uses scroll batches of 1000. You can change the batch size with the scroll_size URL parameter:
POST twitter/_delete_by_query?scroll_size=5000
{
"query": {
"term": {
"user": "kimchy"
}
}
}
You can find more information here about batching and batch sizes here:
batches and requests_per_second in ElasticSearch Delete By Query API
And since you'll need to scroll through one to many batches to delete all of the documents found by your query, you can find more information about scrolling here:
https://www.elastic.co/guide/en/elasticsearch/reference/5.5/search-request-scroll.html
Even after hours of trying to understand Elastic search, I can not understand idea how to achieve the same results for searching text with special characters.
What I am doing wrong with icu_folding? How can I achieve, that results will be same for "Škoda" and "Skoda" same? Is it even possible?
https://github.com/pavoltravnik/examples/blob/master/elastic_search_settings.sh
You're applying the icu_folding token filter on the name.sort sub-field and not on the name field itself, so your queries need to be like this instead:
# 1 result as expected
curl -XGET 'localhost:9200/my_index/_search?pretty' -d'
{
"query": { "match": { "name.sort": "Škoda" } }
}'
# 0 results - I expected the same behaviour
curl -XGET 'localhost:9200/my_index/_search?pretty' -d'
{
"query": { "match": { "name.sort": "Skoda" } }
}'
I know one can delete all documents from a certain type via deleteByQuery.
Example:
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query' -d '{
"query" : {
"term" : { "user" : "kimchy" }
}
}'
But i have NO term and simply want to delete all documents from that type, no matter what term. What is best practice to achieve this? Empty term does not work.
Link to deleteByQuery
I believe if you combine the delete by query with a match all it should do what you are looking for, something like this (using your example):
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query' -d '{
"query" : {
"match_all" : {}
}
}'
Or you could just delete the type:
curl -XDELETE http://localhost:9200/twitter/tweet
Note: XDELETE is deprecated for later versions of ElasticSearch
The Delete-By-Query plugin has been removed in favor of a new Delete By Query API implementation in core. Read here
curl -XPOST 'localhost:9200/twitter/tweet/_delete_by_query?conflicts=proceed&pretty' -H 'Content-Type: application/json' -d'
{
"query": {
"match_all": {}
}
}'
From ElasticSearch 5.x, delete_by_query API is there by default
POST: http://localhost:9200/index/type/_delete_by_query
{
"query": {
"match_all": {}
}
}
You can delete documents from type with following query:
POST /index/type/_delete_by_query
{
"query" : {
"match_all" : {}
}
}
I tested this query in Kibana and Elastic 5.5.2
Torsten Engelbrecht's comment in John Petrones answer expanded:
curl -XDELETE 'http://localhost:9200/twitter/tweet/_query' -d
'{
"query":
{
"match_all": {}
}
}'
(I did not want to edit John's reply, since it got upvotes and is set as answer, and I might have introduced an error)
Starting from Elasticsearch 2.x delete is not anymore allowed, since documents remain in the index causing index corruption.
Since ElasticSearch 7.x, delete-by-query plugin was removed in favor of new Delete By Query API.
The curl option:
curl -X POST "localhost:9200/my-index/_delete_by_query" -H 'Content-Type: application/json' -d' { "query": { "match_all":{} } } '
Or in Kibana
POST /my-index/_delete_by_query
{
"query": {
"match_all":{}
}
}
The above answers no longer work with ES 6.2.2 because of Strict Content-Type Checking for Elasticsearch REST Requests. The curl command which I ended up using is this:
curl -H'Content-Type: application/json' -XPOST 'localhost:9200/yourindex/_doc/_delete_by_query?conflicts=proceed' -d' { "query": { "match_all": {} }}'
In Kibana Console:
POST calls-xin-test-2/_delete_by_query
{
"query": {
"match_all": {}
}
}
(Reputation not high enough to comment)
The second part of John Petrone's answer works - no query needed. It will delete the type and all documents contained in that type, but that can just be re-created whenever you index a new document to that type.
Just to clarify:
$ curl -XDELETE 'http://localhost:9200/twitter/tweet'
Note: this does delete the mapping! But as mentioned before, it can be easily re-mapped by creating a new document.
Note for ES2+
Starting with ES 1.5.3 the delete-by-query API is deprecated, and is completely removed since ES 2.0
Instead of the API, the Delete By Query is now a plugin.
In order to use the Delete By Query plugin you must install the plugin on all nodes of the cluster:
sudo bin/plugin install delete-by-query
All of the nodes must be restarted after the installation.
The usage of the plugin is the same as the old API. You don't need to change anything in your queries - this plugin will just make them work.
*For complete information regarding WHY the API was removed you can read more here.
You have these alternatives:
1) Delete a whole index:
curl -XDELETE 'http://localhost:9200/indexName'
example:
curl -XDELETE 'http://localhost:9200/mentorz'
For more details you can find here -https://www.elastic.co/guide/en/elasticsearch/reference/current/indices-delete-index.html
2) Delete by Query to those that match:
curl -XDELETE 'http://localhost:9200/mentorz/users/_query' -d
'{
"query":
{
"match_all": {}
}
}'
*Here mentorz is an index name and users is a type
I'm using elasticsearch 7.5 and when I use
curl -XPOST 'localhost:9200/materials/_delete_by_query?conflicts=proceed&pretty' -d'
{
"query": {
"match_all": {}
}
}'
which will throw below error.
{
"error" : "Content-Type header [application/x-www-form-urlencoded] is not supported",
"status" : 406
}
I also need to add extra -H 'Content-Type: application/json' header in the request to make it works.
curl -XPOST 'localhost:9200/materials/_delete_by_query?conflicts=proceed&pretty' -H 'Content-Type: application/json' -d'
{
"query": {
"match_all": {}
}
}'
{
"took" : 465,
"timed_out" : false,
"total" : 2275,
"deleted" : 2275,
"batches" : 3,
"version_conflicts" : 0,
"noops" : 0,
"retries" : {
"bulk" : 0,
"search" : 0
},
"throttled_millis" : 0,
"requests_per_second" : -1.0,
"throttled_until_millis" : 0,
"failures" : [ ]
}
Just to add couple cents to this.
The "delete_by_query" mentioned at the top is still available as a plugin in elasticsearch 2.x.
Although in the latest upcoming version 5.x it will be replaced by
"delete by query api"
Elasticsearch 2.3 the option
action.destructive_requires_name: true
in elasticsearch.yml do the trip
curl -XDELETE http://localhost:9200/twitter/tweet
For future readers:
in Elasticsearch 7.x there's effectively one type per index - types are hidden
you can delete by query, but if you want remove everything you'll be much better off removing and re-creating the index. That's because deletes are only soft deletes under the hood, until the trigger Lucene segment merges*, which can be expensive if the index is large. Meanwhile, removing an index is almost instant: remove some files on disk and a reference in the cluster state.
* The video/slides are about Solr, but things work exactly the same in Elasticsearch, this is Lucene-level functionality.
If you want to delete document according to a date.
You can use kibana console (v.6.1.2)
POST index_name/_delete_by_query
{
"query" : {
"range" : {
"sendDate" : {
"lte" : "2018-03-06"
}
}
}
}