HTTP

http.port

A bind port range. Defaults to 9200-9300.

http.publish_port

The port that HTTP clients should use when communicating with this node. Useful when a cluster node is behind a proxy or firewall and the http.port is not directly addressable from the outside. Defaults to the actual port assigned via http.port.

http.bind_host

The host address to bind the HTTP service to. Defaults to http.host (if set) or network.bind_host.

http.publish_host

The host address to publish for HTTP clients to connect to. Defaults to http.host (if set) or network.publish_host.

http.host

Used to set the http.bind_host and the http.publish_host Defaults to http.host or network.host.

http.max_content_length

The max content of an HTTP request. Defaults to 100mb. If set to greater than Integer.MAX_VALUE, it will be reset to 100mb.

http.max_initial_line_length

The max length of an HTTP URL. Defaults to 4kb

http.max_header_size

The max size of allowed headers. Defaults to 8kB

http.compression

Support for compression when possible (with Accept-Encoding). Defaults to true.

http.compression_level

Defines the compression level to use for HTTP responses. Valid values are in the range of 1 (minimum compression) and 9 (maximum compression). Defaults to 3.

http.cors.enabled

Enable or disable cross-origin resource sharing, i.e. whether a browser on another origin can execute requests against Elasticsearch. Set to true to enable Elasticsearch to process pre-flight CORS requests. Elasticsearch will respond to those requests with the Access-Control-Allow-Origin header if the Origin sent in the request is permitted by the http.cors.allow-origin list. Set to false (the default) to make Elasticsearch ignore the Origin request header, effectively disabling CORS requests because Elasticsearch will never respond with the Access-Control-Allow-Origin response header. Note that if the client does not send a pre-flight request with an Origin header or it does not check the response headers from the server to validate the Access-Control-Allow-Origin response header, then cross-origin security is compromised. If CORS is not enabled on Elasticsearch, the only way for the client to know is to send a pre-flight request and realize the required response headers are missing.

http.cors.allow-origin

Which origins to allow. Defaults to no origins allowed. If you prepend and append a / to the value, this will be treated as a regular expression, allowing you to support HTTP and HTTPs. for example using /https?:\/\/localhost(:[0-9]+)?/ would return the request header appropriately in both cases. * is a valid value but is considered a security risk as your Elasticsearch instance is open to cross origin requests from anywhere.

http.cors.max-age

Browsers send a "preflight" OPTIONS-request to determine CORS settings. max-age defines how long the result should be cached for. Defaults to 1728000 (20 days)

http.cors.allow-methods

Which methods to allow. Defaults to OPTIONS, HEAD, GET, POST, PUT, DELETE.

http.cors.allow-headers

Which headers to allow. Defaults to X-Requested-With, Content-Type, Content-Length.

http.cors.allow-credentials

Whether the Access-Control-Allow-Credentials header should be returned. Note: This header is only returned, when the setting is set to true. Defaults to false

http.detailed_errors.enabled

Enables or disables the output of detailed error messages and stack traces in response output. Note: When set to false and the error_trace request parameter is specified, an error will be returned; when error_trace is not specified, a simple message will be returned. Defaults to true

http.pipelining

Enable or disable HTTP pipelining, defaults to true.

http.pipelining.max_events

The maximum number of events to be queued up in memory before a HTTP connection is closed, defaults to 10000.