86 lines
3.2 KiB
Plaintext
86 lines
3.2 KiB
Plaintext
[[modules-http]]
|
|
== HTTP
|
|
|
|
The http module allows to expose *elasticsearch* APIs
|
|
over HTTP.
|
|
|
|
The http mechanism is completely asynchronous in nature, meaning that
|
|
there is no blocking thread waiting for a response. The benefit of using
|
|
asynchronous communication for HTTP is solving the
|
|
http://en.wikipedia.org/wiki/C10k_problem[C10k problem].
|
|
|
|
When possible, consider using
|
|
http://en.wikipedia.org/wiki/Keepalive#HTTP_Keepalive[HTTP keep alive]
|
|
when connecting for better performance and try to get your favorite
|
|
client not to do
|
|
http://en.wikipedia.org/wiki/Chunked_transfer_encoding[HTTP chunking].
|
|
|
|
IMPORTANT: HTTP pipelining is not supported and should be disabled in your HTTP client.
|
|
|
|
[float]
|
|
=== Settings
|
|
|
|
The following are the settings that can be configured for HTTP:
|
|
|
|
[cols="<,<",options="header",]
|
|
|=======================================================================
|
|
|Setting |Description
|
|
|`http.port` |A bind port range. Defaults to `9200-9300`.
|
|
|
|
|`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`
|
|
|
|
|`http.max_initial_line_length` |The max length of an HTTP URL. Defaults
|
|
to `4kb`
|
|
|
|
|`http.compression` |Support for compression when possible (with
|
|
Accept-Encoding). Defaults to `false`.
|
|
|
|
|`http.compression_level` |Defines the compression level to use.
|
|
Defaults to `6`.
|
|
|
|
|`http.cors.enabled` |Enable or disable cross-origin resource sharing,
|
|
i.e. whether a browser on another origin can do requests to
|
|
Elasticsearch. Defaults to `false`.
|
|
|
|
|`http.cors.allow-origin` |Which origins to allow. Defaults to `*`,
|
|
i.e. any origin. 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.
|
|
|
|
|`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`
|
|
|
|
|
|
|=======================================================================
|
|
|
|
It also uses the common
|
|
<<modules-network,network settings>>.
|
|
|
|
[float]
|
|
=== Disable HTTP
|
|
|
|
The http module can be completely disabled and not started by setting
|
|
`http.enabled` to `false`. This make sense when creating non
|
|
<<modules-node,data nodes>> which accept HTTP
|
|
requests, and communicate with data nodes using the internal
|
|
<<modules-transport,transport>>.
|