Docs » Available host and application monitors in Splunk Observability Cloud » Configure application receivers for hosts and servers » Apache Tomcat

Apache Tomcat πŸ”—

The Splunk Distribution of OpenTelemetry Collector uses the Smart Agent receiver with the Collectd Tomcat monitor type to monitor Tomcat. You must activate JMX Remote to monitor Tomcat remotely. See GenericJMX for more information.

This integration is only available on Kubernetes and Linux.

Benefits πŸ”—

After you configure the integration, you can access these features:

Installation πŸ”—

Follow these steps to deploy this integration:

  1. Deploy the Splunk Distribution of OpenTelemetry Collector to your host or container platform:

  2. Configure the monitor, as described in the Configuration section.

  3. Restart the Splunk Distribution of OpenTelemetry Collector.

Configuration πŸ”—

To use this integration of a Smart Agent monitor with the Collector:

  1. Include the Smart Agent receiver in your configuration file.

  2. Add the monitor type to the Collector configuration, both in the receiver and pipelines sections.

Example πŸ”—

To activate this integration, add the following to your Collector configuration:

receivers:
  smartagent/tomcat:
    type: collectd/tomcat
    ...  # Additional config

Next, add the monitor to the service.pipelines.metrics.receivers section of your configuration file:

service:
  pipelines:
    metrics:
      receivers: [smartagent/tomcat]

Configuration settings πŸ”—

The following tables show the configuration options for this integration:

Option

Required

Type

Description

host

yes

string

The host to connect to. JMX must be configured for remote access

and accessible from the agent.

port

yes

integer

The JMX connection port. This is not the same as the remote

method invocation (RMI) port on the application. This corresponds to the com.sun.management.jmxremote.port Java property to set on the JVM when running the application.

name

no

string

serviceName

no

string

This is how the service type is identified in the UI so that you

can get built-in content for it. For custom JMX integrations, it can be set to whatever you like.

serviceURL

no

string

The JMX connection string. This is rendered as a Go template and

has access to the other values in this configuration. Note that under normal circumstances, it is not advised to set this string directly. Setting the host and port as specified above is preferred. The default value is service:jmx:rmi:///jndi/rmi://{{.Host}}:{{.Port}}/jmxrmi).

instancePrefix

no

string

Prefixes the generated plugin instance with prefix. If a second

instancePrefix is specified in a referenced MBean block, the prefix specified in the Connection block appears at the beginning of the plugin instance, and the prefix specified in the MBean block is appended to it.

username

no

string

The username to authenticate to the server.

password

no

string

The user password to authenticate to the server.

customDimensions

no

map of strings

Takes in key-values pairs of custom dimensions at the connection

level.

mBeansToCollect

no

list of strings

A list of the MBeans defined in mBeanDefinitions to actually

collect. If not provided, then all defined MBeans are collected.

mBeansToOmit

no

list of strings

A list of the MBeans to omit. This is useful in cases where only

a few MBeans need to be omitted from the default list.

mBeanDefinitions

no

map of objects (see below)

Specifies how to map JMX MBean values to metrics. If using a

specific service monitor such as Cassandra, Kafka, or ActiveMQ, they come pre-loaded with a set of mappings, and any that you add in this option are merged with those. To learn more, see the Collectd documentation .

The nested mBeanDefinitions configuration object has the following fields:

Option

Required

Type

Description

objectName

no

string

Sets the pattern, which is used to retrieve MBeans from the

MBeanServer. If more than one MBean is returned, use the instanceFrom option to make the identifiers unique.

instancePrefix

no

string

Prefixes the generated plugin instance with prefix.

instanceFrom

no

list of strings

The object names used by JMX to identify MBeans include so

called β€œproperties”, which are basically key-value-pairs. If the given object name is not unique and multiple MBeans are returned, the values of those properties usually differ. Use this option to build the plugin instance from the appropriate property values. This is optional and can be repeated to generate the plugin instance from multiple property values.

values

no

list of objects (see below)

The value blocks map one or more attributes of an MBean to a

value list in collectd. There must be at least one value block within each MBean block.

dimensions

no

list of strings

The nested values configuration object has the following fields:

Option

Required

Type

Description

type

no

string

Sets the data set used within collectd to handle the values of

the MBean attribute.

table

no

bool

Set to true if the returned attribute is a composite type.

If set to true, the keys within the composite type are appended to the type instance. The default value is false.

instancePrefix

no

string

Works like the option of the same name directly beneath the

MBean block, but sets the type instance instead.

instanceFrom

no

list of strings

Works like the option of the same name directly beneath the

MBean block, but sets the type instance instead.

attribute

no

string

Sets the name of the attribute from which to read the value. You

can access the keys of composite types by using a dot to concatenate the key name to the attribute name. For example, β€œattrib0.key42”. If table is set to true, then the path must point to a composite type, otherwise, it must point to a numeric type.

attributes

no

list of strings

The plural form of the attribute configuration above. Used

to derive multiple metrics from a single MBean.

Metrics πŸ”—

The following metrics are available for this integration:

Notes πŸ”—

  • To learn more about the available in Observability Cloud see Metric types

  • In host-based subscription plans, default metrics are those metrics included in host-based subscriptions in Observability Cloud, such as host, container, or bundled metrics. Custom metrics are not provided by default and might be subject to charges. See Metric categories for more information.

  • In MTS-based subscription plans, all metrics are custom.

  • To add additional metrics, see how to configure extraMetrics in Add additional metrics

Troubleshooting πŸ”—

If you are a Splunk Observability Cloud customer and are not able to see your data in Splunk Observability Cloud, you can get help in the following ways.

Available to Splunk Observability Cloud customers

Available to prospective customers and free trial users

  • Ask a question and get answers through community support at Splunk Answers .

  • Join the Splunk #observability user group Slack channel to communicate with customers, partners, and Splunk employees worldwide. To join, see Chat groups in the Get Started with Splunk Community manual.

To learn about even more support options, see Splunk Customer Success .