Siren is a simple CLI tool for performing Consul health checks. Provided a check name along with a WARN and FAIL threshold, Siren will output the following status codes:
| Status | Exit Code |
|---|---|
| Ok | 0 |
| Warn | 1 |
| Fail | 2 |
$ siren mem 10 20
Memory usage: 78.08%
FAIL: memory usage exceeds threshold (78.08% >= 20%)
exit status 2$ siren swap 10 20
Swap usage: 88.62%
FAIL: swap usage exceeds threshold (88.62% >= 20%)
exit status 2$ siren disk 15 20
Status Filesystem Size Used Avail Use% Mounted on
FAIL /dev/disk1 465G 339G 126G 73% /
OK devfs 207K 207K 0 0% /dev
exit status 2Load is based upon a normalized, 5-minute load average: The 5min load average is divided by the number of CPUs.
$ siren load 20 40
CPUs: 8
Load Averages: 2.208 1.971 1.834
Normalized Load: 27.59% 24.63% 22.93%
WARN: 5min normalized load exceeds threshold (24.63% >= 20%)
exit status 1NTP takes WARN and FAIL arguments measured in milliseconds of drift.
$ siren ntp 40 100
NTP drift: 72.06ms
WARN: NTP drift exceeds threshold (72.06ms >= 40ms)
exit status 1Many thanks to the folks over at Cloudfoundry for open-sourcing their Go Sigar port which this library relies upon!