Sending Logstash Logs
Last updated on 25 August, 2024Logstash is a popular open-source data collector which provides a unifying layer between different types of log inputs and outputs.
Recommendation: LogSource is the recommended method to enable LM Logs. To use LogSource, the LM Collector must be version EA 31.200 or later. For more information, see LogSource Overview, or contact your Customer Success Manager. The procedure in the following describes how to enable LM Logs if you are not using LogSource.
If you are already using Logstash to collect application and system logs, you can forward the log data to LogicMonitor using the LM Logs Logstash plugin.
This output plugin contains specific instructions for sending Logstash events to the LogicMonitor Log ingestion API. You can also install the Logstash Monitoring LogicModules for added visibility into your Logstash metrics alongside the logs.
Requirements
- A LogicMonitor account name.
- A LogicMonitor API token to authenticate all requests to the log ingestion API.
Installing the Plugin
Install the LM Logs Logstash plugin using Ruby Gems. Run the following command on your Logstash instance:
logstash-plugin install logstash-output-lmlogsConfiguring the Plugin
The following is an example of the minimum configuration needed for the Logstash plugin. You can add more settings into the configuration file. See the parameters tables in the following.
output {
lmlogs {
access_id => "access_id"
access_key => "access_key"
portal_name => "account-name"
property_key => "hostname"
lm_property => "system.sysname"
}
}Including and Excluding Metadata
By default, all metadata is included in the logs sent to LM Logs. You can also use the include_metadata parameter to include or exclude metadata fields. Add this parameter to the logstash.config file. If set to false, metadata fields will not be sent to the LM Logs ingestion. Default value is “true”.
You can also exclude specific metadata by adding the following to the logstash.config file:
filter { mutate
{ remove_field => [ "[event][sequence]" ]}
}For more information, see the Logstash documentation.
Note: From version 1.1.0 of the Logstash plugin all metadata is included by default. The include_metadata parameter is introduced with version 1.2.0.
Required Parameters
| Name | Description | Default |
| access_id | Username to use for HTTP authentication. | N/A |
| access_key | Password to use for HTTP authentication. | N/A |
| portal_name | The LogicMonitor portal account name. | N/A |
Optional Parameters
| Name | Description | Default |
| batch_size | The number of events to send to LM Logs at one time. Increasing the batch size can increase throughput by reducing HTTP overhead. | 100 |
| keep_timestamp | If false, LM Logs will use the ingestion timestamp as the even timestamp. | true |
| lm_property | Specify the key that will be used by LogicMonitor to match a resource based on property. | system.hostname |
| message_key | The key in the Logstash event that will be used as the logs message. | message |
| property_key | They key in Logstash to find the hostname value, that will be used map to lm_property. | hostname |
| timestamp_is_key | If true, LM Logs will use a specified key as the event timestamp value. | false |
| timestamp_key | If timestamp_is_key=true, LM Logs will use this key in the event as the timestamp. Valid timestamp formats are ISO8601 strings or epoch in seconds, milliseconds, and nanoseconds. | logtimestamp |
| include_metadata | If false, metadata will not be included in the logs sent to LM Logs. | false |
Note: For more information about the message_key and property_key values syntax, see this Logstash documentation.
Building
Run the following command in Docker to build the Logstash plugin:
docker-compose run jruby gem build logstash-output-lmlogs.gemspecTroubleshooting
If you are not seeing logs in LM Logs:
- Ensure that the resource from which the logs are expected is being monitored.
- If the resource exists, check that the
lm_propertyused for mapping the resource is unique. Log ingestion will not work iflm_propertyis used for more than one resource.