Elasticsearch language clients are only backwards compatible with default distributions and without guarantees made. 1.7.0 Sep 21, 2015 1.6.0. Open Distro for Elasticsearch 1.7.0 is now available for download. Upgrade to 1.7.0 to leverage the latest features and bug fixes. The release consists of Apache 2.0 licensed Elasticsearch version 7.6.1, Kibana version 7.6.1, new plugins for anomaly detection and SQL workbench, a new SQL ODBC driver and SQL CLI client.
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Official low-level client for Elasticsearch. Its goal is to provide commonground for all Elasticsearch-related code in Python; because of this it triesto be opinion-free and very extendable.
elasticsearch package with pip:
If your application uses async/await in Python you can install withthe
Read more about how to use asyncio with this project.
Language clients are forward compatible; meaning that clients support communicatingwith greater or equal minor versions of Elasticsearch. Elasticsearch language clientsare only backwards compatible with default distributions and without guarantees made.
If you have a need to have multiple versions installed at the same time olderversions are also released as
This client was designed as very thin wrapper around Elasticsearch’s REST API toallow for maximum flexibility. This means that there are no opinions in thisclient; it also means that some of the APIs are a little cumbersome to use fromPython. We have created some Helpers to help with this issue as well asa more high level library (elasticsearch-dsl) on top of this one to providea more convenient way of working with Elasticsearch.
elasticsearch-py uses persistent connections inside of individual connectionpools (one per each configured or sniffed node). Out of the box you can choosebetween two
http protocol implementations. See Transport classes for moreinformation.
The transport layer will create an instance of the selected connection classper node and keep track of the health of individual nodes - if a node becomesunresponsive (throwing exceptions while connecting to it) it’s put on a timeoutby the
ConnectionPool class and only returned to thecirculation after the timeout is over (or when no live nodes are left). Bydefault nodes are randomized before being passed into the pool and round-robinstrategy is used for load balancing.
You can customize this behavior by passing parameters to theConnection Layer API (all keyword arguments to the
Elasticsearch class will be passed through). If whatyou want to accomplish is not supported you should be able to create a subclassof the relevant component and pass it in as a parameter to be used instead ofthe default implementation.
If a connection to a node fails due to connection issues (raises
ConnectionError) it is considered in faulty state. Itwill be placed on hold for
dead_timeout seconds and the request will beretried on another node. If a connection fails multiple times in a row thetimeout will get progressively larger to avoid hitting a node that’s, by allindication, down. If no live connection is available, the connection that hasthe smallest timeout will be used.
By default retries are not triggered by a timeout(
True to also retry on timeouts.
The client can be configured to inspect the cluster state to get a list ofnodes upon startup, periodically and/or on failure. See
Transport parameters for details.
Some example configurations:
The client is thread safe and can be used in a multi threaded environment. Bestpractice is to create a single global instance of the client and use itthroughout your application. If your application is long-running considerturning on Sniffing to make sure the client is up to date on the clusterlocation.
By default we allow
urllib3 to open up to 10 connections to each node, ifyour application calls for more parallelism, use the
maxsize parameter toraise the limit:
Since we use persistent connections throughout the client it means that theclient doesn’t tolerate
fork very well. If your application calls formultiple processes make sure you create a fresh client after call to
fork. Note that Python’s
multiprocessing module uses
fork tocreate new processes on POSIX systems.
TLS/SSL and Authentication¶
You can configure the client to use
SSL for connecting to yourelasticsearch cluster, including certificate verification and HTTP auth:
elasticsearch-py doesn’t ship with default set of root certificates. Tohave working SSL certificate validation you need to either specify your ownas
cadata or install certifi which willbe picked up automatically.
Urllib3HttpConnection for detaileddescription of the options.
Connecting via Cloud ID¶
Cloud ID is an easy way to configure your client to workwith your Elastic Cloud deployment. Combine the
api_key to authenticatewith your Elastic Cloud deployment.
cloud_id enables TLS verification and HTTP compression by defaultand sets the port to
443 unless otherwise overwritten via the
port parameteror the port value encoded within
cloud_id. Using Cloud ID also disables sniffing.
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API Key Authentication¶
You can configure the client to use Elasticsearch’s API Key for connecting to your cluster.Please note this authentication method has been introduced with release of Elasticsearch
elasticsearch-py uses the standard logging library from python to definetwo loggers:
elasticsearchis used by the client to log standard activity, depending on the log level.
elasticsearch.trace can be used to log requests to the server in the formof
curl commands using pretty-printed json that can then be executed fromcommand line. Because it is designed to be shared (for example to demonstratean issue) it also just uses
localhost:9200 as the address instead of theactual address of the host. If the trace logger has not been configuredalready it is set to propagate=False so it needs to be activated separately.
elasticsearch-py v7.10.0 the library now ships with type hintsand supports basic static type analysis with tools like Mypy and Pyright.
If we write a script that has a type error like using
str argument instead of
float and then run Mypy on the script:
For now many parameter types for API methods aren’t specific toa type (ie they are of type
typing.Any) but in the futurethey will be tightened for even better static type checking.
Type hints also allow tools like your IDE to check types and provide betterauto-complete functionality.
The type hints for API methods like
search don’t match the function signaturethat can be found in the source code. Type hints represent optimal usage of theAPI methods. Using keyword arguments is highly recommended so all optional parametersand
body are keyword-only in type hints.
JetBrains PyCharm will use the warning
Unexpectedargument to denote that theparameter may be keyword-only.
When using the client there are several limitations of your environment thatcould come into play.
When using an HTTP load balancer you cannot use the Sniffingfunctionality - the cluster would supply the client with IP addresses todirectly connect to the cluster, circumventing the load balancer. Depending onyour configuration this might be something you don’t want or break completely.
When using capacity-constrained networks (low throughput), it may be handy to enablecompression. This is especially useful when doing bulk loads or inserting largedocuments. This will configure compression.
Compression is enabled by default when connecting to Elastic Cloud via
By default, JSONSerializer is used to encode all outgoing requests.However, you can implement your own custom serializer
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For a more high level client library with more limited scope, have a look atelasticsearch-dsl - a more pythonic library sitting on top of
elasticsearch-dsl provides a more convenient and idiomatic way to write and manipulatequeries by mirroring the terminology and structure of Elasticsearch JSON DSLwhile exposing the whole range of the DSL from Pythoneither directly using defined classes or a queryset-like expressions.
It also provides an optional persistence layer for working with documents asPython objects in an ORM-like fashion: defining mappings, retrieving and savingdocuments, wrapping the document data in user-defined classes.
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- API Documentation
- Using Asyncio with Elasticsearch
- Connection Layer API
- Transport classes
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