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feat: add Prometheus metrics endpoint and Docker image (PLAN.md 4.2)

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Add internal/metrics package with dedicated Prometheus registry exposing
SSH connection, auth attempt, session, and build info metrics. Wire into
SSH server (4 instrumentation points) and web server (/metrics endpoint).
Add dockerImage output to flake.nix via dockerTools.buildLayeredImage.
Bump version to 0.7.0.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Torjus Håkestad
2026-02-15 05:47:16 +01:00
parent b8fcbc7e10
commit ab07e6a8dc
14 changed files with 342 additions and 19 deletions
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14
cmd/oubliette/main.go
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@@ -14,12 +14,13 @@ import (
"time"
"git.t-juice.club/torjus/oubliette/internal/config"
"git.t-juice.club/torjus/oubliette/internal/metrics"
"git.t-juice.club/torjus/oubliette/internal/server"
"git.t-juice.club/torjus/oubliette/internal/storage"
"git.t-juice.club/torjus/oubliette/internal/web"
)
const Version = "0.6.0"
const Version = "0.7.0"
func main() {
if err := run(); err != nil {
@@ -77,7 +78,9 @@ func run() error {
go storage.RunRetention(ctx, store, cfg.Storage.RetentionDays, cfg.Storage.RetentionIntervalDuration, logger)
srv, err := server.New(*cfg, store, logger)
m := metrics.New(Version)
srv, err := server.New(*cfg, store, logger, m)
if err != nil {
return fmt.Errorf("create server: %w", err)
}
@@ -86,7 +89,12 @@ func run() error {
// Start web server if enabled.
if cfg.Web.Enabled {
webHandler, err := web.NewServer(store, logger.With("component", "web"))
var metricsHandler http.Handler
if *cfg.Web.MetricsEnabled {
metricsHandler = m.Handler()
}
webHandler, err := web.NewServer(store, logger.With("component", "web"), metricsHandler)
if err != nil {
return fmt.Errorf("create web server: %w", err)
}