couchdb_changes

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This CouchDB input allows you to automatically stream events from the CouchDB _changes URI. Moreover, any "future" changes will automatically be streamed as well making it easy to synchronize your CouchDB data with any target destination

Upsert and delete

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You can use event metadata to allow for document deletion. All non-delete operations are treated as upserts

Starting at a Specific Sequence

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The CouchDB input stores the last sequence number value in location defined by sequence_path. You can use this fact to start or resume the stream at a particular sequence.

 

Synopsis

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This plugin supports the following configuration options:

Required configuration options:

couchdb_changes {
    db => ...
}

Available configuration options:

Setting Input type Required Default value

add_field

hash

No

{}

always_reconnect

boolean

No

true

ca_file

a valid filesystem path

No

codec

codec

No

"plain"

db

string

Yes

heartbeat

number

No

1000

host

string

No

"localhost"

ignore_attachments

boolean

No

true

initial_sequence

number

No

keep_revision

boolean

No

false

password

password

No

nil

port

number

No

5984

reconnect_delay

number

No

10

secure

boolean

No

false

sequence_path

string

No

tags

array

No

timeout

number

No

type

string

No

username

string

No

nil

Details

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add_field

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  • Value type is hash
  • Default value is {}

Add a field to an event

always_reconnect

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  • Value type is boolean
  • Default value is true

Reconnect flag. When true, always try to reconnect after a failure

ca_file

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  • Value type is path
  • There is no default value for this setting.

Path to a CA certificate file, used to validate certificates

codec

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  • 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.

  • This is a required setting.
  • Value type is string
  • There is no default value for this setting.

The CouchDB db to connect to. Required parameter.

heartbeat

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  • Value type is number
  • Default value is 1000

Logstash connects to CouchDB’s _changes with feed=continuous The heartbeat is how often (in milliseconds) Logstash will ping CouchDB to ensure the connection is maintained. Changing this setting is not recommended unless you know what you are doing.

host

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  • Value type is string
  • Default value is "localhost"

IP or hostname of your CouchDB instance

ignore_attachments

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  • Value type is boolean
  • Default value is true

Future feature! Until implemented, changing this from the default will not do anything.

Ignore attachments associated with CouchDB documents.

initial_sequence

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  • Value type is number
  • There is no default value for this setting.

If unspecified, Logstash will attempt to read the last sequence number from the sequence_path file. If that is empty or non-existent, it will begin with 0 (the beginning).

If you specify this value, it is anticipated that you will only be doing so for an initial read under special circumstances and that you will unset this value afterwards.

keep_revision

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  • Value type is boolean
  • Default value is false

Preserve the CouchDB document revision "_rev" value in the output.

password

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  • Value type is password
  • Default value is nil

Password, if authentication is needed to connect to CouchDB

port

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  • Value type is number
  • Default value is 5984

Port of your CouchDB instance.

reconnect_delay

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  • Value type is number
  • Default value is 10

Reconnect delay: time between reconnect attempts, in seconds.

secure

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  • Value type is boolean
  • Default value is false

Connect to CouchDB’s _changes feed securely (via https) Default: false (via http)

sequence_path

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  • Value type is string
  • There is no default value for this setting.

File path where the last sequence number in the _changes stream is stored. If unset it will write to $HOME/.couchdb_seq

tags

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  • 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.

timeout

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  • Value type is number
  • There is no default value for this setting.

Timeout: Number of milliseconds to wait for new data before terminating the connection. If a timeout is set it will disable the heartbeat configuration option.

type

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  • 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.

username

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  • Value type is string
  • Default value is nil

Username, if authentication is needed to connect to CouchDB