Home » Categories » Products » Nagios Log Server » Troubleshooting » Common Problems

Nagios Log Server - Troubleshooting Commands

Troubleshooting Commands

This is a list of commands that can be used to help diagnose issues with Nagios Log Server.

Be careful, some commands can be destructive and can result in data loss!

 

 

Generic Information Gathering

Master:

curl 'localhost:9200/_cat/master?v'

 

Nodes:

curl 'localhost:9200/_cat/nodes?v'

 

Pending tasks:

curl 'localhost:9200/_cat/pending_tasks?v'

 

Recovery:

curl -XGET 'localhost:9200/_cat/recovery?v'

 

Running plugins:

curl 'localhost:9200/_cat/plugins?v'

 

Cluster basic health:

curl -XGET 'http://localhost:9200/_cluster/health?pretty=true'

 

Check jvm settings:

curl -XGET localhost:9200/_nodes/jvm?pretty

 

Shard status (use index status instead for clarify, in most cases):

curl -XGET http://localhost:9200/_cat/shards

 

Cluster state:

curl -XGET 'http://localhost:9200/_cluster/state?pretty'

 

Shard health (index health works better in most circumstances):

curl -XGET 'http://localhost:9200/_cluster/health/*?level=shards'

 

 

Red Cluster Recovery

Check index health:

curl 'localhost:9200/_cluster/health?level=indices&pretty'

 

Shard list:

curl -s localhost:9200/_cat/shards

 

Unassigned shards:

curl -s localhost:9200/_cat/shards | grep UNASS

 

Delete bad index:

curl -XDELETE 'http://localhost:9200/twitter/'

 

 

Active Troubleshooting

Tail maintenance logs:

tail -f /usr/local/nagioslogserver/var/jobs.log

 

Tail poller logs:

tail -f /usr/local/nagioslogserver/var/poller.log

 

Shut down all nodes:

curl -XPOST 'http://localhost:9200/_shutdown'

 

Check users:

curl -XGET 'http://localhost:9200/nagioslogserver/_search?type=user&pretty'

 

 

Backup Troubleshooting

Check running knapsack export:

curl -XPOST 'http://localhost:9200/_export/state'

Typically jobs.log should be tailed and the backup+maintenance command should be forced from the subsys - jobs.log should complain about a partial snapshot.

 

Delete a snapshot (versions <= 1.3.0):

curator delete --older-than 1 --prefix logstash-2015.05.19 (replace with snapshot name)

(versions >= 1.3.0):

curator delete snapshots --repository nlsbackup --prefix (replace with snapshot prefix)

 You can also delete snapshots from the Web GUI under the backup page, or directly from the repo.

 

 

Purpose-Driven Commands

Check min master nodes:

curl localhost:9200/_cluster/settings?pretty

 

Set min master nodes:

curl http://localhost:9200/_cluster/settings -XPUT -d '{ "persistent": { "discovery.zen.minimum_master_nodes": 2} }'

 

Check users:

curl -XGET 'http://localhost:9200/nagioslogserver/_search?type=user&pretty'

 

 

Final Thoughts

For any support related questions please visit the Nagios Support Forums at:

http://support.nagios.com/forum/

1 (1)
Article Rating (1 Votes)
Rate this article
  • Icon PDFExport to PDF
  • Icon MS-WordExport to MS Word
Attachments Attachments
There are no attachments for this article.
Related Articles RSS Feed
Nagios Log Server - Logstash process dying
Viewed 5048 times since Mon, Apr 10, 2017
Nagios Log Server - Understanding and Troubleshooting Yellow Cluster Health
Viewed 10097 times since Mon, Feb 15, 2016
Nagios Log Server - License Key Not Accepted
Viewed 4108 times since Wed, Apr 12, 2017
Nagios Log Server - Resetting nagiosadmin Password
Viewed 11076 times since Tue, Aug 9, 2016
Pages Not Displaying Correctly
Viewed 6895 times since Mon, Jan 25, 2016
Nagios Log Server - Understanding and Troubleshooting Red Cluster Health
Viewed 7296 times since Mon, Apr 6, 2015
Forwarding Logs from Nagios Log Server to Another Destination
Viewed 5191 times since Wed, Sep 16, 2020
Nagios Log Server - Troubleshooting Backups
Viewed 4514 times since Fri, Apr 15, 2016
Web Browser Reports 330 Error Content Encoding
Viewed 4402 times since Tue, Mar 7, 2017
Active Directory / LDAP - Troubleshooting Authentication Integration
Viewed 16235 times since Mon, Jun 26, 2017