IMPORTANT: No additional bug fixes or documentation updates will be released for this version. For the latest information, see the current release documentation.
« imap jmx »
Elastic Docs ›Logstash Reference [1.5] ›Logstash Reference ›Input plugins

jdbc

edit

jdbc

edit

This plugin was created as a way to ingest data in any database with a JDBC interface into Logstash. You can periodically schedule ingestion using a cron syntax (see schedule setting) or run the query one time to load data into Logstash. Each row in the resultset becomes a single event. Columns in the resultset are converted into fields in the event.

Drivers

edit

This plugin does not come packaged with JDBC driver libraries. The desired jdbc driver library must be explicitly passed in to the plugin using the jdbc_driver_library configuration option.

Scheduling

edit

Input from this plugin can be scheduled to run periodically according to a specific schedule. This scheduling syntax is powered by rufus-scheduler. The syntax is cron-like with some extensions specific to Rufus (e.g. timezone support).

Examples:

* 5 * 1-3 *

will execute every minute of 5am every day of January through March.

0 * * * *

will execute on the 0th minute of every hour every day.

0 6 * * * America/Chicago

will execute at 6:00am (UTC/GMT -5) every day.

Further documentation describing this syntax can be found here.

State

edit

The plugin will persist the sql_last_start parameter in the form of a metadata file stored in the configured last_run_metadata_path. Upon shutting down, this file will be updated with the current value of sql_last_start. Next time the pipeline starts up, this value will be updated by reading from the file. If clean_run is set to true, this value will be ignored and sql_last_start will be set to Jan 1, 1970, as if no query has ever been executed.

Dealing With Large Result-sets

edit

Many JDBC drivers use the fetch_size parameter to limit how many results are pre-fetched at a time from the cursor into the client’s cache before retrieving more results from the result-set. This is configured in this plugin using the jdbc_fetch_size configuration option. No fetch size is set by default in this plugin, so the specific driver’s default size will be used.

Usage:

edit

Here is an example of setting up the plugin to fetch data from a MySQL database. First, we place the appropriate JDBC driver library in our current path (this can be placed anywhere on your filesystem). In this example, we connect to the mydb database using the user: mysql and wish to input all rows in the songs table that match a specific artist. The following examples demonstrates a possible Logstash configuration for this. The schedule option in this example will instruct the plugin to execute this input statement on the minute, every minute.

input {
  jdbc {
    jdbc_driver_library => "mysql-connector-java-5.1.36-bin.jar"
    jdbc_driver_class => "com.mysql.jdbc.Driver"
    jdbc_connection_string => "jdbc:mysql://localhost:3306/mydb"
    jdbc_user => "mysql"
    parameters => { "favorite_artist" => "Beethoven" }
    schedule => "* * * * *"
    statement => "SELECT * from songs where artist = :favorite_artist"
  }
}

Configuring SQL statement

edit

A sql statement is required for this input. This can be passed-in via a statement option in the form of a string, or read from a file (statement_filepath). File option is typically used when the SQL statement is large or cumbersome to supply in the config. The file option only supports one SQL statement. The plugin will only accept one of the options. It cannot read a statement from a file as well as from the statement configuration parameter.

Predefined Parameters

edit

Some parameters are built-in and can be used from within your queries. Here is the list:

sql_last_start

The last time a statement was executed. This is set to Thursday, 1 January 1970 before any query is run, and updated accordingly after first query is run.

 

Synopsis

edit

This plugin supports the following configuration options:

Required configuration options:

jdbc {
    jdbc_connection_string => ...
    jdbc_driver_class => ...
    jdbc_user => ...
}

Available configuration options:

Setting Input type Required Default value

add_field

hash

No

{}

clean_run

boolean

No

false

codec

codec

No

"plain"

jdbc_connection_string

string

Yes

jdbc_driver_class

string

Yes

jdbc_driver_library

a valid filesystem path

No

jdbc_fetch_size

number

No

jdbc_page_size

number

No

100000

jdbc_paging_enabled

boolean

No

false

jdbc_password

password

No

jdbc_user

string

Yes

jdbc_validate_connection

boolean

No

false

jdbc_validation_timeout

number

No

3600

last_run_metadata_path

string

No

"/Users/suyog/.logstash_jdbc_last_run"

parameters

hash

No

{}

record_last_run

boolean

No

true

schedule

string

No

statement

string

No

statement_filepath

a valid filesystem path

No

tags

array

No

type

string

No

Details

edit

 

add_field

edit
  • Value type is hash
  • Default value is {}

Add a field to an event

charset (DEPRECATED)

edit
  • DEPRECATED WARNING: This configuration item is deprecated and may not be available in future versions. <li> Value type is string
  • There is no default value for this setting.

The character encoding used in this input. Examples include UTF-8 and cp1252

This setting is useful if your log files are in Latin-1 (aka cp1252) or in another character set other than UTF-8.

This only affects plain format logs since json is UTF-8 already.

clean_run

edit
  • Value type is boolean
  • Default value is false

Whether the previous run state should be preserved

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.

debug (DEPRECATED)

edit
  • DEPRECATED WARNING: This configuration item is deprecated and may not be available in future versions.
  • Value type is boolean
  • Default value is false

format (DEPRECATED)

edit
  • DEPRECATED WARNING: This configuration item is deprecated and may not be available in future versions.
  • Value can be any of: plain, json, json_event, msgpack_event
  • There is no default value for this setting.

The format of input data (plain, json, json_event)

jdbc_connection_string

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

JDBC connection string

jdbc_driver_class

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

JDBC driver class to load, for example, "org.apache.derby.jdbc.ClientDriver". If you are using the Oracle JDBC driver (ojdbc6.jar) the correct jdbc_driver_class is "Java::oracle.jdbc.driver.OracleDriver"

jdbc_driver_library

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

JDBC driver library path to third party driver library. If not provided, Plugin will look for the driver class in the Logstash Java classpath.

jdbc_fetch_size

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

JDBC fetch size. if not provided, respective driver’s default will be used

jdbc_page_size

edit
  • Value type is number
  • Default value is 100000

JDBC page size

jdbc_paging_enabled

edit
  • Value type is boolean
  • Default value is false

JDBC enable paging. This will cause a sql statement to be broken up into multiple queries. Each query will use limits and offsets to collectively retrieve the full result-set. The limit size is set with jdbc_page_size.

jdbc_password

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

JDBC password

jdbc_user

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

JDBC user

jdbc_validate_connection

edit
  • Value type is boolean
  • Default value is false

Connection pool configuration. Validate connection before use.

jdbc_validation_timeout

edit
  • Value type is number
  • Default value is 3600

Connection pool configuration. How often to validate a connection (in seconds)

last_run_metadata_path

edit
  • Value type is string
  • Default value is $USER_HOME/.logstash_jdbc_last_run

Path to file with last run time

message_format (DEPRECATED)

edit
  • DEPRECATED WARNING: This configuration item is deprecated and may not be available in future versions.
  • Value type is string
  • There is no default value for this setting.

If format is json, an event sprintf string to build what the display @message should be given (defaults to the raw JSON). sprintf format strings look like %{fieldname}

If format is json_event, ALL fields except for @type are expected to be present. Not receiving all fields will cause unexpected results.

parameters

edit
  • Value type is hash
  • Default value is {}

Hash of query parameter, for example { "target_id" => "321" }

record_last_run

edit
  • Value type is boolean
  • Default value is true

Whether to save state or not in last_run_metadata_path

schedule

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

Schedule of when to periodically run statement, in Cron format for example: "* * * * *" (execute query every minute, on the minute)

There is no schedule by default. If no schedule is given, then the statement is run exactly once.

statement

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

If undefined, Logstash will complain, even if codec is unused. Statement to execute

To use parameters, use named parameter syntax. For example:

"SELECT * FROM MYTABLE WHERE id = :target_id"

here, ":target_id" is a named parameter. You can configure named parameters with the parameters setting.

statement_filepath

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

Path of file containing statement to execute

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.

« imap jmx »