1 unstable release
Uses old Rust 2015
0.1.0 | Oct 30, 2018 |
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#5 in #relic
26KB
517 lines
New Relic Rust Plugin Agent SDK
This project represents a Rust binding of New Relic Plugin API. This crate can be used to build plugin agents.
Examples
// Plugin agent setup
let mut agent = Agent::new("<license_key>".into(), "1.0.0".into(), "host".into(), 1234);
let mut c1 = agent.create_component("Test Plugin".into(), "com.test_plugin.plugin_name".into());
agent.create_metric(&mut c1, "Component/Request/Rate/host1[requests/second]".into());
agent.create_metric(&mut c1, "Component/Request/Rate/host2[requests/second]".into());
agent.register_component(c1);
// Poll cycle function. This function is excuted every [poll_cycle] seconds.
fn cycle(agent: &mut Agent){
agent.report_metric(
"com.test_plugin.plugin_name".into(),
"Component/Request/Rate/host1[requests/second]".into(),
(1000) as f64, None
);
agent.report_metric(
"com.test_plugin.plugin_name".into(),
"Component/Request/Rate/host2[requests/second]".into(),
(1000) as f64, None
);
}
// Start the agent
agent.run(cycle);
state
An agent has the option to have a state to be able to preserve metric readings through cycles. States are passed to Agent instances via the set_state
function. States are generic types, which means you can create a custom struct like in this example:
struct State{
prev_file_size: i32
}
// Plugin agent setup
let mut agent = Agent::new("<license_key>".into(), "1.0.0".into(), "host".into(), 1234);
let mut c1 = agent.create_component("Test Plugin".into(), "com.test_plugin.plugin_name".into());
agent.create_metric(&mut c1, "Component/File/Size/host1[bytes]".into());
agent.register_component(c1);
// Poll cycle function. This function is excuted every [poll_cycle] seconds.
fn cycle(agent: &mut Agent){
let prev_size = agent.get_state().as_ref().unwrap().prev_file_size.clone();
let new_size = 2000;
if prev_size != 0{
agent.report_metric(
"com.test_plugin.plugin_name".into(),
"Component/File/Size/host1[bytes]".into(),
new_size - prev_size as f64, None
);
}
agent.set_state(State{prev_file_size: new_size});
}
// Start the agent
agent.run(cycle);
config
NewRelic plugin reads configuration from a config.yml
file located in the current working directory. If no config.yml
file is present, default values are used. Possible config keys and values:
Config key | Description | Default |
---|---|---|
endpoint | NewRelic custom plugin API endpoint | https://platform-api.newrelic.com/platform/v1/metrics |
log4rs_file | log4rs config file | log4rs.yml |
deliver_cycle | metric reporting frequency | 60 (seconds) |
poll_cycle | poll cycle frequency | 20 (seconds) |
logging
NewRelic plugin uses log4rs. All events logged from within the agent are sent to a logger named "agent". You can add more loggers in log4rs config file to log messages from your plugin's code.
Example log4rs.yml
file:
refresh_rate: 60 seconds
appenders:
agent:
kind: file
path: "log/agent.log"
encoder:
pattern: "{d} - {l} - {f} - {m}{n}"
plugin:
kind: file
path: "log/plugin.log"
encoder:
pattern: "{d} - {l} - {f} - {m}{n}"
loggers:
agent:
level: error
appenders:
- agent
plugin:
level: info
appenders:
- plugin
Dependencies
~12–21MB
~325K SLoC