Http input plugin v3.5.0
editHttp input plugin v3.5.0
edit- Plugin version: v3.5.0
- Released on: 2022-03-17
- 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
editUsing this input you can receive single or multiline events over http(s).
Applications can send an HTTP request to the endpoint started by this input and
Logstash will convert it into an event for subsequent processing. Users
can pass plain text, JSON, or any formatted data and use a corresponding codec with this
input. For Content-Type application/json
the json
codec is used, but for all other
data formats, plain
codec is used.
This input can also be used to receive webhook requests to integrate with other services and applications. By taking advantage of the vast plugin ecosystem available in Logstash you can trigger actionable events right from your application.
Event Metadata and the Elastic Common Schema (ECS)
editIn addition to decoding the events, this input will add HTTP headers containing connection information to each event.
When ECS compatibility is disabled, the headers are stored in the headers
field, which has the potential to create confusion and schema conflicts downstream.
When ECS is enabled, we can ensure a pipeline maintains access to this metadata throughout the event’s lifecycle without polluting the top-level namespace.
Here’s how ECS compatibility mode affects output.
ECS `disabled` | ECS `v1`,`v8` | Availability | Description |
---|---|---|---|
[host] |
[host][ip] |
Always |
Host IP address |
[headers] |
[@metadata][input][http][request][headers] |
Always |
Complete HTTP headers |
[headers][http_version] |
[http][version] |
Always |
HTTP version |
[headers][http_user_agent] |
[user_agent][original] |
Always |
client user agent |
[headers][http_host] |
[url][domain] and [url][port] |
Always |
host domain and port |
[headers][request_method] |
[http][method] |
Always |
HTTP method |
[headers][request_path] |
[url][path] |
Always |
Query path |
[headers][content_length] |
[http][request][body][bytes] |
Always |
Request content length |
[headers][content_type] |
[http][request][mime_type] |
Always |
Request mime type |
Blocking Behavior
editThe HTTP protocol doesn’t deal well with long running requests. This plugin will either return a 429 (busy) error when Logstash is backlogged, or it will time out the request.
If a 429 error is encountered clients should sleep, backing off exponentially with some random jitter, then retry their request.
This plugin will block if the Logstash queue is blocked and there are available HTTP input threads. This will cause most HTTP clients to time out. Sent events will still be processed in this case. This behavior is not optimal and will be changed in a future release. In the future, this plugin will always return a 429 if the queue is busy, and will not time out in the event of a busy queue.
Security
editThis plugin supports standard HTTP basic authentication headers to identify the requester. You can pass in a username, password combination while sending data to this input
You can also setup SSL and send data securely over https, with multiple options such as validating the client’s certificate.
Codec settings
editThis plugin has two configuration options for codecs: codec
and additional_codecs
.
Values in additional_codecs
are prioritized over those specified in the
codec
option. That is, the default codec
is applied only if no codec
for the request’s content-type is found in the additional_codecs
setting.
Http Input Configuration Options
editThis plugin supports the following configuration options plus the Common options described later.
Setting | Input type | Required |
---|---|---|
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
No |
||
number, one of |
No |
|
No |
||
a valid filesystem path |
No |
|
No |
||
No |
||
a valid filesystem path |
No |
|
No |
||
string, one of |
No |
|
No |
||
No |
||
No |
||
No |
||
string, one of |
No |
Also see Common options for a list of options supported by all input plugins.
additional_codecs
edit- Value type is hash
-
Default value is
{"application/json"=>"json"}
Apply specific codecs for specific content types. The default codec will be applied only after this list is checked and no codec for the request’s content-type is found
cipher_suites
edit- Value type is array
-
Default value is
[TLS_AES_128_GCM_SHA256, TLS_AES_256_GCM_SHA384, TLS_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384, TLS_ECDHE_ECDSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_RSA_WITH_CHACHA20_POLY1305_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256, TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384, TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256, TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256]
The list of cipher suites to use, listed by priorities. This default list applies for OpenJDK 11.0.14 and higher. For older JDK versions, the default list includes only suites supported by that version. For example, the ChaCha20 family of ciphers is not supported in older versions.
ecs_compatibility
edit- Value type is string
-
Supported values are:
-
disabled
: unstructured connection metadata added at root level -
v1
,v8
: headers added under[@metadata][http][header]
. Some are copied to structured ECS fieldshttp
,url
,user_agent
andhost
-
Controls this plugin’s compatibility with the Elastic Common Schema (ECS). See Event Metadata and the Elastic Common Schema (ECS) for detailed information.
Example output:
Sample output: ECS disabled
{ "@version" => "1", "headers" => { "request_path" => "/twitter/tweet/1", "http_accept" => "*/*", "http_version" => "HTTP/1.1", "request_method" => "PUT", "http_host" => "localhost:8080", "http_user_agent" => "curl/7.64.1", "content_length" => "5", "content_type" => "application/x-www-form-urlencoded" }, "@timestamp" => 2021-05-28T19:27:28.609Z, "host" => "127.0.0.1", "message" => "hello" }
Sample output: ECS enabled
{ "@version" => "1", "user_agent" => { "original" => "curl/7.64.1" }, "http" => { "method" => "PUT", "request" => { "mime_type" => "application/x-www-form-urlencoded", "body" => { "bytes" => "5" } }, "version" => "HTTP/1.1" }, "url" => { "port" => "8080", "domain" => "snmp1", "path" => "/twitter/tweet/1" }, "@timestamp" => 2021-05-28T23:32:38.222Z, "host" => { "ip" => "127.0.0.1" }, "message" => "hello", }
keystore
edit- Value type is path
- There is no default value for this setting.
- This option is deprecated
The JKS keystore to validate the client’s certificates
Note: This option is deprecated and it will be removed in the next major version of Logstash.
Use ssl_certificate
and ssl_key
instead.
keystore_password
edit- Value type is password
- There is no default value for this setting.
- This option is deprecated
Set the truststore password
Note: This option is deprecated and it will be removed in the next major version of Logstash.
Use ssl_certificate
and ssl_key
instead.
password
edit- Value type is password
- There is no default value for this setting.
Password for basic authorization
max_content_length
edit- Value type is number
- Default value is 104857600
The max content of an HTTP request in bytes. It defaults to 100mb.
max_pending_requests
edit- Value type is number
- Default value is 200
Maximum number of incoming requests to store in a temporary queue before being processed by worker threads. If a request arrives and the queue is full a 429 response will be returned immediately. This queue exists to deal with micro bursts of events and to improve overall throughput, so it should be changed very carefully as it can lead to memory pressure and impact performance. If you need to deal both periodic or unforeseen spikes in incoming requests consider enabling the Persistent Queue for the logstash pipeline.
response_code
edit- Value can be any of: 200, 201, 202, 204
-
Default value is
200
The HTTP return code if the request is processed successfully.
Other return codes may happen in the case of an error condition, such as invalid credentials (401), internal errors (503) or backpressure (429).
If 204 (No Content) is set, the response body will not be sent in the response.
response_headers
edit- Value type is hash
-
Default value is
{"Content-Type"=>"text/plain"}
specify a custom set of response headers
remote_host_target_field
edit- Value type is string
-
Default value is
"host"
when ECS is disabled -
Default value is
[host][ip]
when ECS is enabled
specify a target field for the client host of the http request
request_headers_target_field
edit- Value type is string
-
Default value is
"headers"
when ECS is disabled -
Default value is
[@metadata][http][header]
when ECS is enabled
specify target field for the client host of the http request
ssl
edit- Value type is boolean
-
Default value is
false
Events are by default sent in plain text. You can
enable encryption by setting ssl
to true and configuring
the ssl_certificate
and ssl_key
options.
ssl_certificate
edit- Value type is path
- There is no default value for this setting.
SSL certificate to use.
ssl_certificate_authorities
edit- Value type is array
-
Default value is
[]
Validate client certificates against these authorities.
You can define multiple files or paths. All the certificates will
be read and added to the trust store. You need to configure the ssl_verify_mode
to peer
or force_peer
to enable the verification.
ssl_handshake_timeout
edit- Value type is number
-
Default value is
10000
Time in milliseconds for an incomplete ssl handshake to timeout
ssl_key
edit- Value type is path
- There is no default value for this setting.
SSL key to use. NOTE: This key need to be in the PKCS8 format, you can convert it with OpenSSL for more information.
ssl_key_passphrase
edit- Value type is password
- There is no default value for this setting.
SSL key passphrase to use.
ssl_verify_mode
edit-
Value can be any of:
none
,peer
,force_peer
-
Default value is
"none"
By default the server doesn’t do any client verification.
peer
will make the server ask the client to provide a certificate.
If the client provides a certificate, it will be validated.
force_peer
will make the server ask the client to provide a certificate.
If the client doesn’t provide a certificate, the connection will be closed.
This option needs to be used with ssl_certificate_authorities
and a defined list of CAs.
threads
edit- Value type is number
- Default value is number of processors
Number of threads to use for both accepting connections and handling requests
tls_max_version
edit- Value type is number
-
Default value is
1.3
The maximum TLS version allowed for the encrypted connections. The value must be the one of the following: 1.1 for TLS 1.1, 1.2 for TLS 1.2, 1.3 for TLSv1.3
tls_min_version
edit- Value type is number
-
Default value is
1.2
The minimum TLS version allowed for the encrypted connections. The value must be one of the following: 1.1 for TLS 1.1, 1.2 for TLS 1.2, 1.3 for TLSv1.3
user
edit- Value type is string
- There is no default value for this setting.
Username for basic authorization
verify_mode
edit-
Value can be any of:
none
,peer
,force_peer
-
Default value is
"none"
- This option is deprecated
Set the client certificate verification method. Valid methods: none, peer, force_peer
Note: This option is deprecated and it will be removed in the next major version of Logstash.
Use ssl_verify_mode
instead.
Common options
editThese configuration options are supported by all input plugins:
Setting | Input type | Required |
---|---|---|
No |
||
No |
||
No |
||
No |
||
No |
||
No |
codec
edit- Value type is codec
-
Default value is
"plain"
The codec used for input data. Input codecs are a convenient method for decoding your data before it enters the input, without needing a separate filter in your Logstash pipeline.
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 http inputs.
Adding a named ID in this case will help in monitoring Logstash when using the monitoring APIs.
input { http { id => "my_plugin_id" } }
tags
edit- Value type is array
- There is no default value for this setting.
Add any number of arbitrary tags to your event.
This can help with processing later.
type
edit- Value type is string
- There is no default value for this setting.
Add a type
field to all events handled by this input.
Types are used mainly for filter activation.
The type is stored as part of the event itself, so you can also use the type to search for it in Kibana.
If you try to set a type on an event that already has one (for example when you send an event from a shipper to an indexer) then a new input will not override the existing type. A type set at the shipper stays with that event for its life even when sent to another Logstash server.