Chapter 101. Nagios
Nagios
Available as of Apache Camel 2.3
URI format
nagios://host[:port][?Options]
Apache Camel provides two abilities with the Nagios component. You can send passive check messages by sending a message to its endpoint. Apache Camel also provides a EventNotifer which allows you to send notifications to Nagios.
Options
| Name | Default Value | Description |
|---|---|---|
host
|
none | This is the address of the Nagios host where checks should be send. |
port
|
The port number of the host. | |
password
|
Password to be authenticated when sending checks to Nagios. | |
connectionTimeout
|
5000 | Connection timeout in millis. |
timeout
|
5000 | Sending timeout in millis. |
nagiosSettings
|
To use an already configured com.googlecode.jsendnsca.core.NagiosSettings object. Then any of the other options are not in use, if using this.
|
|
sendSync
|
true
|
Whether or not to use synchronous when sending a passive check. Setting it to false will allow Apache Camel to continue routing the message and the passive check message will be send asynchronously.
|
encryptionMethod
|
No
|
*Camel 2.9:* To specify an encryption method. Possible values: No, Xor, or TripleDes.
|
Headers
| Name | Description |
|---|---|
CamelNagiosHostName
|
This is the address of the Nagios host where checks should be send. This header will override any existing hostname configured on the endpoint. |
CamelNagiosLevel
|
This is the severity level. You can use values CRITICAL, WARNING, OK. Apache Camel will by default use OK.
|
CamelNagiosServiceName
|
The servie name. Will default use the CamelContext name. |
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 Apache Camel will pick it up as documented here: Advanced configuration of CamelContext using Spring.
