Monit log file monitoring free#

Now let’s look at some service entry types, and some of the service tests they can define. There are many, but below we will only look at alert and restart. action specifies what Monit should do if the error condition is satisfied.Complicated ones can be split across multiple lines. body specifies an error condition for the resource.Each service test has the form if then, where: identifier is a unique identifier for this service entry, used in the web interface and included in any alert messages delivered via email.Īn entry restricts the service tests defined inside of it to those that are meaningful for its resource.type specifies the type of resource that Monit should monitor, such as process for a process, host for the connection to a remote host, and so on.To assert that Monit can find and parse this file, run monit -t:įollowing the preamble should be one or more service entries, each containing its respective service tests.Įach service entry starts with check, where: Upon startup, Monit looks for this configuration file at /etc/monitrc or /etc/nf. When monitoring is disabled for an entry, Monit will not evaluate its service tests and consequently will not generate alerts for it. The time between Monit waking up to evaluate these tests is called a cycle and is also specified in the configuration file.Īdditionally, you can toggle monitoring for each service entry. Monit sends these alerts via email to one or more specified addresses specified in the configuration file. If the error condition of a service test is satisfied, then Monit generates an error, also called an alert. Monit typically runs continuously as a daemon, during which it periodically wakes up and evaluates each service test defined in its configuration file. Examples include a process not accepting connections on a specified port, a file having an unexpected checksum, CPU usage exceeding a given threshold, and so on. This condition should not be satisfied if the resource is performing normally. A service test is defined inside a service entry and defines an error condition for the resource.A service entry specifies a resource that Monit should monitor, such as a daemon process, file, directory, remote host, and so on.Configuration conceptsĪt the heart of a Monit configuration file are its service entries and their service tests: As we will see, with very little effort you can understand other configuration files, and borrow from them to write your own. But just as much, I love Monit for the conciseness and the readability of its configuration language. I love Monit for the completeness of its feature set. Monit conducts automatic maintenance and repair and can execute meaningful causal actions in error situations.”

Monit log file monitoring free#

“Monit is a free open source utility for managing and monitoring processes, programs, files, directories and filesystems on a UNIX system.