Nagios Component

Since Camel 2.3

Only producer is supported

The Nagios component allows you to send passive checks to Nagios.

Maven users will need to add the following dependency to their pom.xml for this component:

<dependency>
    <groupId>org.apache.camel</groupId>
    <artifactId>camel-nagios</artifactId>
    <version>x.x.x</version>
    <!-- use the same version as your Camel core version -->
</dependency>

URI format

nagios://host[:port][?Options]

Camel provides two abilities with the Nagios component. You can send passive check messages by sending a message to its endpoint.
Camel also provides a EventNotifer which allows you to send notifications to Nagios.

Options

The Nagios component supports 4 options, which are listed below.

Name Description Default Type

configuration (advanced)

To use a shared NagiosConfiguration

NagiosConfiguration

basicPropertyBinding (advanced)

Whether the component should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

boolean

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

bridgeErrorHandler (consumer)

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

boolean

The Nagios endpoint is configured using URI syntax:

nagios:host:port

with the following path and query parameters:

Path Parameters (2 parameters):

Name Description Default Type

host

Required This is the address of the Nagios host where checks should be send.

String

port

Required The port number of the host.

int

Query Parameters (9 parameters):

Name Description Default Type

connectionTimeout (producer)

Connection timeout in millis.

5000

int

lazyStartProducer (producer)

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

boolean

sendSync (producer)

Whether or not to use synchronous when sending a passive check. Setting it to false will allow Camel to continue routing the message and the passive check message will be send asynchronously.

true

boolean

timeout (producer)

Sending timeout in millis.

5000

int

basicPropertyBinding (advanced)

Whether the endpoint should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

boolean

synchronous (advanced)

Sets whether synchronous processing should be strictly used, or Camel is allowed to use asynchronous processing (if supported).

false

boolean

encryption (security)

To specify an encryption method.

Encryption

encryptionMethod (security)

Deprecated To specify an encryption method.

NagiosEncryptionMethod

password (security)

Password to be authenticated when sending checks to Nagios.

String

Spring Boot Auto-Configuration

When using Spring Boot make sure to use the following Maven dependency to have support for auto configuration:

<dependency>
  <groupId>org.apache.camel.springboot</groupId>
  <artifactId>camel-nagios-starter</artifactId>
  <version>x.x.x</version>
  <!-- use the same version as your Camel core version -->
</dependency>

The component supports 12 options, which are listed below.

Name Description Default Type

camel.component.nagios.basic-property-binding

Whether the component should use basic property binding (Camel 2.x) or the newer property binding with additional capabilities

false

Boolean

camel.component.nagios.bridge-error-handler

Allows for bridging the consumer to the Camel routing Error Handler, which mean any exceptions occurred while the consumer is trying to pickup incoming messages, or the likes, will now be processed as a message and handled by the routing Error Handler. By default the consumer will use the org.apache.camel.spi.ExceptionHandler to deal with exceptions, that will be logged at WARN or ERROR level and ignored.

false

Boolean

camel.component.nagios.configuration.connection-timeout

Connection timeout in millis.

5000

Integer

camel.component.nagios.configuration.encryption

To specify an encryption method.

Encryption

camel.component.nagios.configuration.host

This is the address of the Nagios host where checks should be send.

String

camel.component.nagios.configuration.nagios-settings

Returns a copy of this configuration

NagiosSettings

camel.component.nagios.configuration.password

Password to be authenticated when sending checks to Nagios.

String

camel.component.nagios.configuration.port

The port number of the host.

Integer

camel.component.nagios.configuration.timeout

Sending timeout in millis.

5000

Integer

camel.component.nagios.enabled

Enable nagios component

true

Boolean

camel.component.nagios.lazy-start-producer

Whether the producer should be started lazy (on the first message). By starting lazy you can use this to allow CamelContext and routes to startup in situations where a producer may otherwise fail during starting and cause the route to fail being started. By deferring this startup to be lazy then the startup failure can be handled during routing messages via Camel’s routing error handlers. Beware that when the first message is processed then creating and starting the producer may take a little time and prolong the total processing time of the processing.

false

Boolean

camel.component.nagios.configuration.encryption-method

Deprecated To specify an encryption method.

NagiosEncryptionMethod

Sending message examples

You can send a message to Nagios where the message payload contains the message. By default it will be OK level and use the CamelContext name as the service name. You can overrule these values using headers as shown above.

For example we send the Hello Nagios message to Nagios as follows:

    template.sendBody("direct:start", "Hello Nagios");

    from("direct:start").to("nagios:127.0.0.1:5667?password=secret").to("mock:result");

To send a CRITICAL message you can send the headers such as:

        Map headers = new HashMap();
        headers.put(NagiosConstants.LEVEL, "CRITICAL");
        headers.put(NagiosConstants.HOST_NAME, "myHost");
        headers.put(NagiosConstants.SERVICE_NAME, "myService");
        template.sendBodyAndHeaders("direct:start", "Hello Nagios", headers);

Using NagiosEventNotifer

The Nagios component also provides an EventNotifer which you can use to send events to Nagios. For example we can enable this from Java as follows:

        NagiosEventNotifier notifier = new NagiosEventNotifier();
        notifier.getConfiguration().setHost("localhost");
        notifier.getConfiguration().setPort(5667);
        notifier.getConfiguration().setPassword("password");

        CamelContext context = ...
        context.getManagementStrategy().addEventNotifier(notifier);
        return context;

In Spring XML its just a matter of defining a Spring bean with the type EventNotifier and Camel will pick it up as documented here: Advanced configuration of CamelContext using Spring.