Smart Extend can't read more than 3 disks

[gitterdoneplease]

The problem

I finally got smart working and then it stopped. The results include the long extended testing now after I created crontab entries per the instructions:

*/5 * * * * /etc/snmp/smart -u
0 0 * * * /etc/snmp/smart -t long

My config file is:

smartctl=/sbin/smartctl
cache=/var/cache/smart
aacraid0,0 /dev/sda -d aacraid,0,0,0
aacraid0,1 /dev/sda -d aacraid,0,0,1
aacraid0,2 /dev/sda -d aacraid,0,0,2
#aacraid0,3 /dev/sda -d aacraid,0,0,3
#aacraid0,4 /dev/sda -d aacraid,0,0,4
#aacraid0,5 /dev/sda -d aacraid,0,0,5
#aacraid0,6 /dev/sda -d aacraid,0,0,6
#aacraid0,7 /dev/sda -d aacraid,0,0,7
#aacraid0,8 /dev/sda -d aacraid,0,0,8
#aacraid0,9 /dev/sda -d aacraid,0,0,9

If I comment out any more than those three drives in the discovery debug I get:

Applications: 
SNMP['/usr/bin/snmpbulkwalk' '-v2c' '-c' 'COMMUNITY' '-OQUs' '-m' 'NET-SNMP-EXTEND-MIB' '-M' '/opt/librenms/mibs' 'udp:HOSTNAME:161' 'nsExtendStatus']

Exitcode: 1  

Timeout: No Response from udp:myIP:161  

Timeout: No Response from udp:myIP:161  

and:

SQL[insert into eventlog (reference, type, datetime, severity, message, username, device_id) values (?, ?, ?, ?, ?, ?, ?) [null,"application","2024-05-22 22:09:25",3,"Application disabled by discovery: smart","",29] 2.38ms]

I've tried using v3 TCP/UDP and v2c as well with no luck.

Output of ./validate.php

librenms@librenms:~$ ./validate.php
===========================================
Component | Version
--------- | -------
LibreNMS  | 24.5.0-11-gc7708922a (2024-05-22T20:03:51-07:00)
DB Schema | 2024_04_29_183605_custom_maps_drop_background_suffix_and_background_version (294)
PHP       | 8.1.2-1ubuntu2.14
Python    | 3.10.12
Database  | MariaDB 10.6.12-MariaDB-0ubuntu0.22.04.1
RRDTool   | 1.7.2
SNMP      | 5.9.1
===========================================

[OK]    Composer Version: 2.7.4
[OK]    Dependencies up-to-date.
[OK]    Database connection successful
[OK]    Database Schema is current
[OK]    SQL Server meets minimum requirements
[OK]    lower_case_table_names is enabled
[OK]    MySQL engine is optimal
[OK]    Database and column collations are correct
[OK]    Database schema correct
[OK]    MySQL and PHP time match
[OK]    Active pollers found
[OK]    Dispatcher Service not detected
[OK]    Locks are functional
[OK]    Python poller wrapper is polling
[OK]    Redis is unavailable
[OK]    rrd_dir is writable
[OK]    rrdtool version ok

What was the last working version of LibreNMS?

No response

Anything in the logs that might be useful for us?

No issues in the logs that I see.

[VVelox]

@gitterdoneplease What does relevant bit of your SNMPD config look like?

Also likely want to call from cron with -Z as with out that, that can break snmpd.

[VVelox]

Created a PR for updating the docs on this a bit. #16086

Likely what you want to do after enabling the -Z flag for the cron job is set update cache printing to be /bin/cat /var/cache/smart in your snmpd config.

[gitterdoneplease]

Well that's a lot different than what I had before. 😁

My crontab is now:

*/5 * * * * /etc/snmp/smart -uZ
0 0 * * * /etc/snmp/smart -Zt long

And my snmpd.conf file looks like:

extend smart /bin/cat /var/cache/smart

This will mean adjusting SELinux if you have it.

All working now. Great to see some updated documentation.