Since 2006, The documentation for the HTTP Collector has read:
"SPECIAL NOTE: an enhancement will be made that allows the ${ipaddr}
to be part of any of the <url> element's attributes."
but there has been no enhancement bug in bugzilla and everyone seems to
have forgotten about this.
We have several services for which status information is available via
3rd-party monitoring systems, but the machine cannot be contacted directly.
We aimed to use the PassiveStatusKeeper and the HTTP Collector to
achieve full monitoring of those services. we then discovered that
${ipaddr} could not be specified as a part of any useful field in the
HTTP collector.
I have created an enhancement bug for this.
In the end, we have got something that does the job working well, based
on the Importer, PSK, and a modified version of the HttpCollector.
We are using foreign keys in the importer, and don't really trust the IP
addresses we are given... and since I was already doing some small
lookups into the OpenNMS database to persist categories, I used
${nodeID} as an easy persistent key in the HttpCollector.
Ideally I would be using the import's Foreign Keys here, but I'm not
sure how to access that information in the code.
My final diff to http collector is attatched.
And I will get a copy of the Contributor agreement to you ASAP. :)
Jessica Mayo,
URSYS Pty. Ltd.
13 Burwood Rd, Burwood NSW 2134, Australia
Ph: +61 2 8745 2800 Fax: +61 2 8745 2828 http://www.ursys.com.au/
---
../opennms.bak/opennms-services/src/main/java/org/opennms/netmgt/collectd/HttpCollector.java
2008-06-03 16:39:27.000000000 +1000
+++
../opennms/opennms-services/src/main/java/org/opennms/netmgt/collectd/HttpCollector.java
2008-07-15 12:00:31.000000000 +1000
@@ -478,24 +478,28 @@
private URI buildUri(final HttpCollectionSet collectionSet) throws
URIException {
return new URI(collectionSet.getUriDef().getUrl().getScheme(),
collectionSet.getUriDef().getUrl().getUserInfo(),
- determineHost(collectionSet.getAgent().getInetAddress(),
collectionSet.getUriDef()),
+ doSubs(collectionSet,
collectionSet.getUriDef().getUrl().getHost(), "getHost"),
collectionSet.getUriDef().getUrl().getPort(),
- collectionSet.getUriDef().getUrl().getPath(),
- collectionSet.getUriDef().getUrl().getQuery(),
- collectionSet.getUriDef().getUrl().getFragment());
+ doSubs(collectionSet,
collectionSet.getUriDef().getUrl().getPath(), "getURL"),
+ doSubs(collectionSet,
collectionSet.getUriDef().getUrl().getQuery(), "getQuery"),
+ doSubs(collectionSet,
collectionSet.getUriDef().getUrl().getFragment(), "getFragment"));
}
//note: trouble deciding here on getHost() vs. getIpAddress() or
//getCanonicalHost() even.
- private String determineHost(final InetAddress address, final Uri uriDef) {
- String host;
- if ("${ipaddr}".equals(uriDef.getUrl().getHost())) {
- host = address.getHostName();
- } else {
- host = uriDef.getUrl().getHost();
+ private String doSubs(final HttpCollectionSet collectionSet, final String
urlFragment, final String desc) {
+ String newFragment = urlFragment;
+ if (newFragment != null)
+ {
+ String hoststr = new
String(collectionSet.getAgent().getInetAddress().getHostName());
+ String nodestr = new
String(Integer.toString(collectionSet.getAgent().getNodeId()));
+ newFragment = newFragment.replaceAll("\\$\\{ipaddr\\}", hoststr);
+ newFragment = newFragment.replaceAll("\\$\\{nodeID\\}", nodestr);
+ if (newFragment.compareTo(urlFragment) != 0) {
+ log().debug("doSubs: "+desc+" substituted as
\""+newFragment+"\"");
+ }
}
- log().debug("determineHost: host for URI is set to: "+host);
- return host;
+ return newFragment;
}
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