feat(server): ability to disable metrics
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Jef Roosens 2022-12-28 17:39:45 +01:00
parent c0f58ddc77
commit 0c581981b9
6 changed files with 24 additions and 8 deletions

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@ -7,6 +7,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
## [Unreleased](https://git.rustybever.be/vieter-v/vieter/src/branch/dev)
* Metrics endpoint for Prometheus integration
## [0.5.0](https://git.rustybever.be/vieter-v/vieter/src/tag/0.5.0)
### Added

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@ -3,14 +3,17 @@ module server
import metrics
import web
// v1_metrics serves a Prometheus-compatible metrics endpoint.
['/api/v1/metrics'; get]
fn (mut app App) v1_metrics() web.Result {
if !app.conf.collect_metrics {
return app.status(.not_found)
}
mut exporter := metrics.new_prometheus_exporter([0.01, 0.05, 0.1, 0.5, 1, 100])
exporter.load(app.collector)
// TODO stream to connection instead
body := exporter.export_to_string() or {
return app.status(.internal_server_error)
}
body := exporter.export_to_string() or { return app.status(.internal_server_error) }
return app.body(.ok, 'text/plain', body)
}

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@ -15,6 +15,7 @@ pub:
base_image string = 'archlinux:base-devel'
max_log_age int [empty_default]
log_removal_schedule string = '0 0'
collect_metrics bool [empty_default]
}
// cmd returns the cli submodule that handles starting the server

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@ -101,14 +101,20 @@ pub fn server(conf Config) ! {
util.exit_with_message(1, 'Failed to initialize database: $err.msg()')
}
collector := if conf.collect_metrics {
&metrics.MetricsCollector(metrics.new_default_collector())
} else {
&metrics.MetricsCollector(metrics.new_null_collector())
}
mut app := &App{
logger: logger
api_key: conf.api_key
conf: conf
repo: repo
db: db
collector: collector
job_queue: build.new_job_queue(global_ce, conf.base_image)
collector: metrics.new_default_collector()
}
app.init_job_queue() or {
util.exit_with_message(1, 'Failed to inialize job queue: $err.msg()')

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@ -148,6 +148,7 @@ pub fn (ctx &Context) is_authenticated() bool {
return false
}
// body sends the given body as an HTTP response.
pub fn (mut ctx Context) body(status http.Status, content_type string, body string) Result {
ctx.status = status
ctx.content_type = content_type
@ -334,11 +335,13 @@ fn handle_conn<T>(mut conn net.TcpConn, mut app T, routes map[string]Route) {
labels := [
['method', app.req.method.str()]!,
['path', app.req.url]!,
['status', app.status.int().str()]!
['status', app.status.int().str()]!,
]
app.collector.counter_increment(name: 'http_requests_total', labels: labels)
app.collector.histogram_record(time.ticks() - app.page_gen_start, name: 'http_requests_time_ms', labels: labels)
/* app.collector.histogram_ */
app.collector.histogram_record(time.ticks() - app.page_gen_start,
name: 'http_requests_time_ms'
labels: labels
)
unsafe {
free(app)

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@ -13,3 +13,4 @@ api_update_frequency = 2
image_rebuild_frequency = 1
max_concurrent_builds = 3
max_log_age = 64
collect_metrics = true