Elasticsearch filter plugin v3.1.5
editElasticsearch filter plugin v3.1.5
edit- Plugin version: v3.1.5
- Released on: 2017-07-28
- Changelog
For other versions, see the overview list.
To learn more about Logstash, see the Logstash Reference.
Getting help
editFor questions about the plugin, open a topic in the Discuss forums. For bugs or feature requests, open an issue in Github. For the list of Elastic supported plugins, please consult the Elastic Support Matrix.
Description
editCompatibility Note
Starting with Elasticsearch 5.3, there’s an HTTP setting
called http.content_type.required
. If this option is set to true
, and you
are using Logstash 2.4 through 5.2, you need to update the Elasticsearch filter
plugin to version 3.1.1 or higher.
Search Elasticsearch for a previous log event and copy some fields from it into the current event. Below are two complete examples of how this filter might be used.
The first example uses the legacy query parameter where the user is limited to an Elasticsearch query_string.
Whenever logstash receives an "end" event, it uses this elasticsearch
filter to find the matching "start" event based on some operation identifier.
Then it copies the @timestamp
field from the "start" event into a new field on
the "end" event. Finally, using a combination of the "date" filter and the
"ruby" filter, we calculate the time duration in hours between the two events.
if [type] == "end" { elasticsearch { hosts => ["es-server"] query => "type:start AND operation:%{[opid]}" fields => { "@timestamp" => "started" } } date { match => ["[started]", "ISO8601"] target => "[started]" } ruby { code => "event['duration_hrs'] = (event['@timestamp'] - event['started']) / 3600 rescue nil" } } The example below reproduces the above example but utilises the query_template. This query_template represents a full Elasticsearch query DSL and supports the standard Logstash field substitution syntax. The example below issues the same query as the first example but uses the template shown. if [type] == "end" { elasticsearch { hosts => ["es-server"] query_template => "template.json" } date { match => ["[started]", "ISO8601"] target => "[started]" } ruby { code => "event['duration_hrs'] = (event['@timestamp'] - event['started']) / 3600 rescue nil" } } template.json: { "query": { "query_string": { "query": "type:start AND operation:%{[opid]}" } }, "_source": ["@timestamp", "started"] } As illustrated above, through the use of 'opid', fields from the Logstash events can be referenced within the template. The template will be populated per event prior to being used to query Elasticsearch.
Elasticsearch Filter Configuration Options
editThis plugin supports the following configuration options plus the Common options described later.
Setting | Input type | Required |
---|---|---|
a valid filesystem path |
No |
|
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
Also see Common options for a list of options supported by all filter plugins.
ca_file
edit- Value type is path
- There is no default value for this setting.
SSL Certificate Authority file
fields
edit- Value type is array
-
Default value is
{}
Array of fields to copy from old event (found via elasticsearch) into new event
hosts
edit- Value type is array
-
Default value is
["localhost:9200"]
List of elasticsearch hosts to use for querying.
index
edit- Value type is string
-
Default value is
""
Comma-delimited list of index names to search; use _all
or empty string to perform the operation on all indices
password
edit- Value type is password
- There is no default value for this setting.
Basic Auth - password
query
edit- Value type is string
- There is no default value for this setting.
Elasticsearch query string. Read the Elasticsearch query string documentation. for more info at: https://www.elastic.co/guide/en/elasticsearch/reference/master/query-dsl-query-string-query.html#query-string-syntax
query_template
edit- Value type is string
- There is no default value for this setting.
File path to elasticsearch query in DSL format. Read the Elasticsearch query documentation for more info at: https://www.elastic.co/guide/en/elasticsearch/reference/current/query-dsl.html
sort
edit- Value type is string
-
Default value is
"@timestamp:desc"
Comma-delimited list of <field>:<direction>
pairs that define the sort order
Common options
editThese configuration options are supported by all filter plugins:
Setting | Input type | Required |
---|---|---|
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
add_field
edit- Value type is hash
-
Default value is
{}
If this filter is successful, add any arbitrary fields to this event.
Field names can be dynamic and include parts of the event using the %{field}
.
Example:
filter { elasticsearch { add_field => { "foo_%{somefield}" => "Hello world, from %{host}" } } }
# You can also add multiple fields at once: filter { elasticsearch { add_field => { "foo_%{somefield}" => "Hello world, from %{host}" "new_field" => "new_static_value" } } }
If the event has field "somefield" == "hello"
this filter, on success,
would add field foo_hello
if it is present, with the
value above and the %{host}
piece replaced with that value from the
event. The second example would also add a hardcoded field.
add_tag
edit- Value type is array
-
Default value is
[]
If this filter is successful, add arbitrary tags to the event.
Tags can be dynamic and include parts of the event using the %{field}
syntax.
Example:
filter { elasticsearch { add_tag => [ "foo_%{somefield}" ] } }
# You can also add multiple tags at once: filter { elasticsearch { add_tag => [ "foo_%{somefield}", "taggedy_tag"] } }
If the event has field "somefield" == "hello"
this filter, on success,
would add a tag foo_hello
(and the second example would of course add a taggedy_tag
tag).
enable_metric
edit- Value type is boolean
-
Default value is
true
Disable or enable metric logging for this specific plugin instance by default we record all the metrics we can, but you can disable metrics collection for a specific plugin.
id
edit- Value type is string
- There is no default value for this setting.
Add a unique ID
to the plugin configuration. If no ID is specified, Logstash will generate one.
It is strongly recommended to set this ID in your configuration. This is particularly useful
when you have two or more plugins of the same type, for example, if you have 2 elasticsearch filters.
Adding a named ID in this case will help in monitoring Logstash when using the monitoring APIs.
filter { elasticsearch { id => "ABC" } }
periodic_flush
edit- Value type is boolean
-
Default value is
false
Call the filter flush method at regular interval. Optional.
remove_field
edit- Value type is array
-
Default value is
[]
If this filter is successful, remove arbitrary fields from this event. Fields names can be dynamic and include parts of the event using the %{field} Example:
filter { elasticsearch { remove_field => [ "foo_%{somefield}" ] } }
# You can also remove multiple fields at once: filter { elasticsearch { remove_field => [ "foo_%{somefield}", "my_extraneous_field" ] } }
If the event has field "somefield" == "hello"
this filter, on success,
would remove the field with name foo_hello
if it is present. The second
example would remove an additional, non-dynamic field.
remove_tag
edit- Value type is array
-
Default value is
[]
If this filter is successful, remove arbitrary tags from the event.
Tags can be dynamic and include parts of the event using the %{field}
syntax.
Example:
filter { elasticsearch { remove_tag => [ "foo_%{somefield}" ] } }
# You can also remove multiple tags at once: filter { elasticsearch { remove_tag => [ "foo_%{somefield}", "sad_unwanted_tag"] } }
If the event has field "somefield" == "hello"
this filter, on success,
would remove the tag foo_hello
if it is present. The second example
would remove a sad, unwanted tag as well.