57 lines
2.7 KiB
Plaintext
57 lines
2.7 KiB
Plaintext
[[breaking_50_scripting]]
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=== Script related changes
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==== Indexed scripts and templates
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Indexed scrips and templates have been replaced by <<modules-scripting-stored-scripts,stored scripts>>
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which stores the scripts and templates in the cluster state instead of a dedicate `.scripts` index.
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For the size of stored scripts there is a soft limit of 65535 bytes. If scripts exceed that size then
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the `script.max_size_in_bytes` setting can be added to elasticsearch.yml to change the soft limit to a higher value.
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If scripts are really large, other options like native scripts should be considered.
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Previously indexed scripts in the `.scripts` index will not be used any more as
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Elasticsearch will now try to fetch the scripts from the cluster state. Upon upgrading
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to 5.x the `.scripts` index will remain to exist, so it can be used by a script to migrate
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the stored scripts from the `.scripts` index into the cluster state. The format of the scripts
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hasn't changed.
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The following Python script can be used to import your indexed scripts into the cluster state
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as stored scripts:
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[source,python]
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-----------------------------------
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from elasticsearch import Elasticsearch,helpers
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es = Elasticsearch([
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{'host': 'localhost'}
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])
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for doc in helpers.scan(es, index=".scripts", preserve_order=True):
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es.put_script(lang=doc['_type'], id=doc['_id'], body=doc['_source'])
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-----------------------------------
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This script makes use of the official Elasticsearch Python client and
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therefor you need to make sure that your have installed the client in your
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environment. For more information on this please visit the
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https://www.elastic.co/guide/en/elasticsearch/client/python-api/current/index.html[elasticsearch-py page].
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After you have moved the scripts via the provided script or otherwise then you can verify with the following
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request if the migration has happened successfully:
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[source,js]
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-----------------------------------
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GET _cluster/state?filter_path=metadata.stored_scripts
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-----------------------------------
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The response should include all your scripts from the `.scripts` index.
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After you have verified that all your scripts have been moved, optionally as a last step,
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you can delete the `.scripts` index as Elasticsearch no longer uses it.
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==== Indexed scripts Java APIs
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All the methods related to interacting with indexed scripts have been removed.
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The Java API methods for interacting with stored scripts have been added under `ClusterAdminClient` class.
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The sugar methods that used to exist on the indexed scripts API methods don't exist on the methods for
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stored scripts. The only way to provide scripts is by using `BytesReference` implementation, if a string needs to be
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provided the `BytesArray` class should be used. |