Community Support

Knowledge Base Find or create articles to solve specific known problems or instructions how to diagnose problems with OpenNMS and it’s components.

Topic	Replies	Views	Activity
OpenNMS webapp startup failure due to unresolved symlinks Knowledge Base how-to , java , fedora-29	1	180	April 18, 2019
How to use NGINX as SSL Proxy with OpenNMS Horizon Knowledge Base how-to , ssl , reverse-proxy , lets-encrypt	7	1586	June 22, 2020
Too many buckets exception in Flow Deep Dive Dashboard Knowledge Base elasticsearch , helm , sig-flows	1	134	April 27, 2020
Forwarding events from one OpenNMS server to another using SNMPv3 Knowledge Base how-to	3	749	June 17, 2020
Understanding SNMP Knowledge Base snmp , polling , data-collection	1	104	June 10, 2020
How to investigate file descriptor issues Knowledge Base troubleshooting , linux , file-descriptor	2	257	June 9, 2020
Display state of Business Service in Grafana Knowledge Base how-to	6	144	June 8, 2020
Using ScriptPolicies to set assets Knowledge Base how-to , faq , provisioning , policy	1	50	June 2, 2020
Monitor APC Ambient Temperature Probe Knowledge Base how-to , polling , apc , metrics , data-collection	1	172	February 18, 2020
Monitor APC UPS Units Knowledge Base how-to , polling , apc , metrics , data-collection	1	249	February 19, 2020
Ignoring Docker volumes and network interfaces Knowledge Base faq , sig-docker , policy , metrics	1	56	April 28, 2020
Explaining RRDTool Configuration Knowledge Base rrd	1	186	March 24, 2020
How to detect system or application restarts using uptime metrics Knowledge Base how-to , snmp , thresholding , jmx	1	213	June 5, 2019
How to install an older version of OpenNMS Horizon Knowledge Base how-to , installation	1	540	May 3, 2019
How to setup SSL with Jetty Knowledge Base how-to , ssl , config-files , https	1	543	March 4, 2020
How to run Grafana and OpenNMS Helm in Docker Knowledge Base how-to , sig-k8s , helm , sig-docker , best-practice , grafana	1	178	January 29, 2020
How to Monitor Websites Using Metadata Knowledge Base how-to , meta-dsl	1	163	May 19, 2020
Upgrading PostgreSQL Knowledge Base postgresql , upgrade Since OpenNMS Horizon 25 has a new requirement of PostgreSQL 10 or higher, it’s likely many of you are needing to look into how to go about upgrading it. Here is a short tutorial on what you need to do. NOTE: This tuto…	13	1367	May 19, 2020
Importing Nodes From Netbox via PRIS Knowledge Base provisioning , pris , netbox	1	597	June 5, 2019
Crash when Netflow 5 Adapter is not found in Telemetryd after upgrade Knowledge Base netflow , upgrade , telemetryd	7	333	April 27, 2020
Elasticsearch circuit breaker exception in Flow Deep Dive Dashboard Knowledge Base elasticsearch , helm , sig-flows	1	124	April 27, 2020
How to use pmacct as a Netflow 9 probe on Ubuntu Linux Knowledge Base how-to , netflow9 , pmacct	2	259	April 15, 2020
How to forward alarms northbound via Syslog messages and SNMP traps Knowledge Base how-to , alarms , northbounder , snmp-traps	4	1265	April 14, 2020
Running in Docker and receiving flows, traps or syslog messages over UDP Knowledge Base sig-docker , flows , snmp-traps , macosx , syslog	1	122	March 18, 2020
OpenNMS Mirror Server Knowledge Base package-repos	1	66	March 30, 2020
Using Browser Keyword Search with OpenNMS Knowledge Base how-to , keywordsearch , firefox , chrome	3	59	March 30, 2020
Installing OpenNMS fails with ClassNotFoundException: com.sun.tools.attach.AttachNotSupportedException Knowledge Base troubleshooting , installation	3	1114	March 27, 2020
Create a separate collectd log for a particular node Knowledge Base troubleshooting , how-to , collectd , logging	1	414	June 5, 2019
Quickest way to add nodes with ping-only monitoring? Knowledge Base discovery , polling	3	128	March 27, 2020
Running circle config validation as pre-commit hook in git Knowledge Base circleci , git	1	75	March 19, 2020