The nf file provides the most configuration options for setting up a file monitor input. You can use the nf file to monitor files and directories with the Splunk platform. Best of both worlds.Monitor files and directories with nf Collect syslog with syslog-ng and collect app logs with Splunk. So, often the best solution is to run Splunk Forwarders on those hosts that have multiline logs and use syslog/syslog-ng on your central server. What are the drawbacks of Forwarders? Just like conifiguring Splunk as a syslog receiver, if your splunk instance is down, you get no data. I then recommend configuring a Splunk instance to monitor the target directory of the syslog messages as well as pointing Splunk at the directories that contain the multi-line events. This guarantees that you will always have the original data around. I like using syslog/syslog-ng for collecting the log data to a central repository. Typically I recommend using a mixture of inputs. This makes troubleshooting java apps, php apps, practically anything that uses this format, trivial. Where does Splunk Forwarders come into play here? (I knew you would ask) The Splunk monitor stanza would look like this: For example, /var/log/archive/hosts/hostname/…/ #Splunk inputs.conf archive#To configure your Splunk host to properly get the hostname on a log archive with syslog-ng, you would have to make sure syslog-ng is creating the hostname in the path. Splunk can still be easily configured to monitor the target path and easily handle the naming of incoming systems, events, and dates. Also, syslog-ng allows you to pre-filter messages upon their arrival into “buckets” to give you better control over your logs. If you have too many messages for the network, interface, or host you are running syslog on you will drop data. Syslog-ng allows you to use TCP rather than UDP to send your log messages. I like to recommend syslog-ng for both large scale deployments, and deployments where there is significant traffic. On the sender hosts append to the end of the file “*.* Add an entry to your /etc/hosts file for the IP address of “LOGHOST”Īssuming your receiver has the /var/log directory set up create an nf in your $SPLUNK_HOME/etc/system/local/ directory with the following stanza.Append -r to the SYSLOGD_OPTIONS=”-m 0 -r” On most systems these days the syslog flags are configured in the /etc/sysconfig/syslog file. Step one, configure syslog to “listen” to incoming messages.Run Splunk on your receiver and you’re done.Īs an example, lets say we have a Linux deployment. If you have a medium scale deployment where you have lots of servers, you can configure syslog to listen to remote syslog hosts. Often this is /var/log or /var/adm depending on a Linux or Solaris installation. You would just configure Splunk to use the Monitor input and point it to the target directory that you are storing your syslog log files in. If you only deal with single line events then syslog is fine. Setting Splunk up to handle syslog inputs is trivial. Most, if not all systems come with syslog built in. “What are you currently running in your infrastructure? Do you have a log archive? What are you comfortable configuring?” I often get asked, which is better for Log Management Syslog, Syslog-ng or Splunk Forwarders… More information can be found in our blog post, here. #Splunk inputs.conf update#I mportant Update as of : Splunk has released Splunk Connect for Syslog (SC4S) and solution for syslog data sources.
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