Bosun is an open-source, MIT licensed, monitoring and alerting system by Stack Exchange. It has an expressive domain specific language for evaluating alerts and creating detailed notifications. It also lets you test your alerts against history for a faster development experience. 
Bosun receives metric data mostly via scollector which is Boson's agent running on each monitored host. scollector runs build-in as well as external collectors periodically to collect and transmit metrics on its hosts.
While it is easy to create external collectors suitable for most needs, there are cases in which sending a single, individual metric datum may be helpful. Such cases may comprise any individually run program such as a Cron job for backups or in general any other shell script. Further, it might be helpful to send metric data from your own application.
bosun_emitter is a library that makes it easy to send metric data and corresponding meta data describing the metric. Further, this crate contains a CLI standalone binary called
emit_bosun that may be used on the command line or from any shell script to send a single metric datum.
Command Line Tool
Emit a Bosun USAGE: emit_bosun [FLAGS] [OPTIONS] FLAGS: -h, --help Prints help information --show-config Prints config -V, --version Prints version information --verbose Enables verbose output OPTIONS: -c, --config <FILE> Sets a custom config file -d, --description <DESCRIPTION> Sets metric description --host <HOST:PORT> Sets Bosun server connection parameters --hostname <HOSTNAME> Sets hostname -m, --metric <METRIC NAME> Sets metric name -r, --rate <RATE> Sets rate type [values: gauge, counter, rate] -t, --tags <KEY1=VALUE1,KEY2=VALUE2,...> Sets tags -u, --unit <UNIT> Sets metric value unit -v, --value <VALUE> Sets metric value Two modes are supported, i.e., sending a datum with meta data or sending only meta data. The modes are controlled whether a value `--value` is passed or not. Please mind that in both cases the meta data is required.
emit_bosun -c examples/scollector.toml --host localhost:8070 --tags 'key1=value1,key2=value2' \ --metric lukas.test --value 10 \ --rate gauge --unit Tests -d "Amount of Lukas Tests" \ --verbose
You can find the source code for each release on the GitHub Release page.
Travi CI creates Ubuntu Trusty packages for
emit_bosun for each release. Please see the Repository for details.
Rust crate releases can be found on Crates.io.
I'll be happy about suggestions and pull requests.