![]() The results of this search could be used to make an alert for when an index stops receiving logs. | eval recent = if(latest > relative_time(now(),"-5m"),1,0), realLatest = strftime(latest,"%c") | tstats latest(_time) as latest where index=* earliest=-24h by index Look at indexes in the last 24 hours, if they have not sent logs in the last 5 minutes, list them out. The following SPL searches can be used to get visibility on the current indexes and whether they have received logs after a certain period of time:įind and List all Indexes | eventcount summarize=false index=* index=_* ![]() This threshold can differ as some logs are expected to be constantly noisy such as firewalls, while others could be based on user activity and/or time of day such as transaction logs. Monitoring hosts with logging involves first understanding what logs are expected and establishing a time threshold for when they are “stopped”. This will be the second method discussed in this blog post to monitor assets reporting a Splunk environment. ![]() This means the simplest way of checking if a machine is up can still be useful – ping. Here the host is up but is not sending logs (at the moment). In some environments, however, logs may stop due to system restarts, configuration changes, low traffic times, etc. If a host stops sending logs, it can be an indication that the machine is down. ![]() If a log successfully gets to Splunk this shows the log generation, Splunk forwarding and Splunk service are working/running. The first is through monitoring of the logs the machines are supposed to be sending to Splunk. This can be done in different ways and this article highlights two of them. One of the many uses for Splunk is monitoring an environment and its assets. ![]()
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