jail_exporter 0.16.1

Prometheus exporter for FreeBSD jails.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34

#![forbid(unsafe_code)]
#![deny(missing_docs)]
use crate::errors::ExporterError;
use crate::rctlstate::RctlState;
use tracing::debug;

// Checks for the availability of RACCT/RCTL in the kernel.
pub fn is_available() -> Result<(), ExporterError> {
    debug!("Checking RACCT/RCTL status");

    match RctlState::check() {
        RctlState::Disabled => {
            Err(ExporterError::RctlUnavailable(
                "Present, but disabled; enable using \
                 kern.racct.enable=1 tunable".to_owned()
            ))
        },
        RctlState::Enabled => Ok(()),
        RctlState::Jailed => {
            // This isn't strictly true. Jail exporter should be able to run
            // within a jail, for situations where a user has jails within
            // jails. It is just untested at the moment.
            Err(ExporterError::RctlUnavailable(
                "Jail Exporter cannot run within a jail".to_owned()
            ))
        },
        RctlState::NotPresent => {
            Err(ExporterError::RctlUnavailable(
                "Support not present in kernel; see rctl(8) \
                 for details".to_owned()
            ))
        },
    }
}