How To Configure SNMP Logging on RHEL 7
1 like47,880 views
This document discusses how to configure SNMP logging on RHEL 7. It describes editing the SNMP daemon configuration file to set startup options like logging level and facility. It also provides instructions for starting, stopping, restarting, and checking the status of the SNMP daemon service using systemctl commands.
How To Configure SNMP Logging on RHEL 7
- 1. How To Configure SNMP Logging on RHEL 7 i | P a g e Table of Contents Overview.......................................................................................................................................................1 Applies To......................................................................................................................................................1 Pre-Requisites ...............................................................................................................................................1 SNMP Daemon – Configuration File .............................................................................................................1 SNMP Daemon – Configuration File – View..................................................................................................1 SNMP Daemon – Configuration File – Reconfiguration................................................................................2 SNMP Daemon – Startup Options.................................................................................................................4 Startup Options Purpose...........................................................................................................................5 Syslog Daemon Options............................................................................................................................5 Logging Facility Table................................................................................................................................6 SNMP Daemon Management .......................................................................................................................6 SNMP Daemon – Start ..............................................................................................................................7 SNMP Daemon – Stop...............................................................................................................................7 SNMP Daemon – Restart ..........................................................................................................................8 SNMP Daemon – Status............................................................................................................................8
- 2. How To Configure SNMP Logging on RHEL 7 1 | P a g e Overview In this guide we will go over different SNMP logging facility configuration on a Linux based operating system. We will also go over different SNMPD startup options as per the business / IT Operations requirements. We will also get to know as to how we can configure logging levels based on the “Logging Facility” and when to utilize various SNMP daemon startup options. Applies To Ubuntu RHEL 6.5 RHEL 7 Pre-Requisites Net-SNMP packages is installed on the server. SNMP Daemon – Configuration File Listed below is the configuration file “snmpd.conf” location on different operating systems. Operating System File Location Ubuntu /etc/default/snmpd RHEL / CentOS /etc/sysconfig/snmpd SNMP Daemon – Configuration File – View Once you configure the snmp daemon startup options you can also validate / view configuration by running the below command; On Ubuntu – run the command; lsb_release -d cat /etc/default/snmpd | grep SNMPDOPTS
- 3. How To Configure SNMP Logging on RHEL 7 2 | P a g e On RHEL / CentOS – run the command; cat /etc/redhat-release cat /etc/sysconfig/snmpd | grep OPTIONS SNMP Daemon – Configuration File – Reconfiguration In case the default / custom configuration file is missing or corrupted, you can recreate a new snmp.conf configuration file; to reconfigure / re-create run the command below; snmpconf
- 4. How To Configure SNMP Logging on RHEL 7 3 | P a g e With this command you can also reconfigure / create new configuration file(s); When you run the command, it will read the current configuration file; 1. /etc/snmp/snmp.conf 2. /etc/snmp/snmpd.conf 3. /etc/snmp/snmptrapd.conf Upon reconfiguring is done with “snmpconf” command; you can perform these actions; overwrite rename append skip
- 5. How To Configure SNMP Logging on RHEL 7 4 | P a g e SNMP Daemon – Startup Options By default, SNMP daemon is started with the configuration file “/etc/default/snmpd”, “/etc/sysconfig/snmp” in Ubuntu, RHEL OS respectively with startup options as below; # RHEL OS cat /etc/sysconfig/snmp # OPTIONS="-LS0-6d" # Ubuntu OS cat /etc/default/snmpd SNMPDOPTS='-Lsd -Lf /dev/null -u snmp -I -smux -p /var/run/snmpd.pid -g root 0.0.0.0'
- 6. How To Configure SNMP Logging on RHEL 7 5 | P a g e Startup Options Purpose SNMP daemon startup attribute(s) purpose are shown below table. Option Purpose L Logging S Syslog D Daemon -Ls Log messages via syslog -Lf Log messages to the specified file U User I Initialize smux SNMP Multiplexing Protocol (disabled by default) P Process ID G Group ID Syslog Daemon Options Syslog daemon startup can be configured with different options, few of them are listed in the below table; Logging Options Purpose -Lsd Log Syslog Daemon (default) -LSwd or -Ls4d Log Syslog Warning Message -LSed or -LS3d Log Syslog Error Message -Lf /dev/null Redirect to Null file
- 7. How To Configure SNMP Logging on RHEL 7 6 | P a g e Logging Facility Table Table below gives logging facility that can be configured. Numeric Value Character Value Log Type Logging Scenario / Purpose 0 ! LOG_EMERG Emergencies – System is unusable 1 a LOG_ALERT Alerts – Immediate action needed 2 b LOG_CRIT Critical – Critical conditions 3 c LOG_ERR Errors – Error conditions 4 e LOG_WARNING Warnings – Warning conditions 5 n LOG_NOTICE Notifications – Informational messages 6 i LOG_INFO Informational – Normal but significant conditions 7 d LOG_DEBUG Debugging – Debugging messages SNMP Daemon Management To manage snmpd daemon, run the command based on the SysVinit or Service Manager enabled on the server(s); SysVinit Enabled OS Systemd Enabled OS service snmpd start systemctl start snmpd service snmpd stop systemctl stop snmpd service snmpd restart systemctl restart snmpd
- 8. How To Configure SNMP Logging on RHEL 7 7 | P a g e SNMP Daemon – Start To start the snmpd daemon, run the command; systemctl start snmpd SNMP Daemon – Stop To stop the snmpd daemon, run the command; systemctl stop snmpd
- 9. How To Configure SNMP Logging on RHEL 7 8 | P a g e SNMP Daemon – Restart To restart the snmpd daemon, run the command; systemctl restart snmpd SNMP Daemon – Status To know the status of snmpd daemon, run the command; systemctl status snmpd