-

2026-02-12 00:54:45 +08:00
parent 41ddc6b60f
commit f9c40f05c3
14 changed files with 669 additions and 0 deletions
--- a/.gitignore
+++ b/.gitignore
@@ -0,0 +1,4 @@
+.vscode
+*.db
+*.duckdb
+v
--- a/README.md
+++ b/README.md
--- a/datasource/Dockerfile
+++ b/datasource/Dockerfile
@@ -0,0 +1,12 @@
+FROM golang:1.25.7-trixie AS build
+ENV CGO_ENABLED=1
+WORKDIR /app
+COPY go.mod go.sum .
+RUN go mod download
+COPY . .
+RUN go build -o main .
+
+FROM ubuntu:24.04
+COPY --from=build /app/main /app/main
+WORKDIR /app
+CMD ["./main"]
--- a/datasource/collector/collector.go
+++ b/datasource/collector/collector.go
@@ -0,0 +1,9 @@
+package collector
+
+import (
+	"context"
+)
+
+type Collector interface {
+	Collect(context.Context) error
+}
--- a/datasource/collector/redis.go
+++ b/datasource/collector/redis.go
@@ -0,0 +1,77 @@
+package collector
+
+import (
+	"context"
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+
+	"datasource/config"
+	"datasource/store"
+	"datasource/types"
+)
+
+type RedisCollector struct {
+	rdb   *redis.Client
+	store *store.Store
+}
+
+func NewRedisCollector(cfg *config.RedisConfig, store *store.Store) *RedisCollector {
+	rdb := redis.NewClient(&redis.Options{
+		Addr:     fmt.Sprintf("%s:%d", cfg.Host, cfg.Port),
+		Password: cfg.Password,
+	})
+	return &RedisCollector{rdb: rdb, store: store}
+}
+
+func (c *RedisCollector) Close() error {
+	return c.rdb.Close()
+}
+
+func (c *RedisCollector) Collect(ctx context.Context) error {
+	metric := new(types.Metric)
+
+	info, err := c.rdb.Info(ctx, "server", "memory").Result()
+
+	if err != nil {
+		// todo (david): log but don't return the error as we still need to save the metric
+	} else {
+		metric.Up = 1
+
+		for _, line := range strings.Split(info, "\r\n") {
+			kv := strings.Split(line, ":")
+			if len(kv) < 2 {
+				continue
+			}
+
+			k, v := kv[0], kv[1]
+
+			switch k {
+			case "uptime_in_seconds":
+				if uptimeSec, err := strconv.ParseInt(v, 10, 64); err != nil {
+					return err
+				} else {
+					metric.UptimeSec = uptimeSec
+				}
+			case "used_memory":
+				if memoryUsageBytes, err := strconv.ParseInt(v, 10, 64); err != nil {
+					return err
+				} else {
+					metric.MemoryUsageBytes = memoryUsageBytes
+				}
+			}
+		}
+	}
+
+	metric.Service = "redis"
+	metric.TimestampSec = time.Now().Unix()
+
+	if err := c.store.SaveMetric(ctx, metric); err != nil {
+		return err
+	}
+
+	return nil
+}
--- a/datasource/config.ini
+++ b/datasource/config.ini
@@ -0,0 +1,8 @@
+[data_source]
+port=6060
+db_path=./data/metrics.duckdb
+
+[redis]
+host=127.0.0.1
+port=6379
+; password=boingboing
--- a/datasource/config/config.go
+++ b/datasource/config/config.go
@@ -0,0 +1,88 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+
+	"gopkg.in/ini.v1"
+)
+
+type DataSourceConfig struct {
+	Port   int
+	DBPath string
+}
+
+type RedisConfig struct {
+	Host     string
+	Port     int
+	Password string
+}
+
+func loadRequiredInt(sec *ini.Section, key string) (int, error) {
+	val, err := sec.GetKey(key)
+	if err != nil {
+		return 0, err
+	}
+	res, err := val.Int()
+	if err != nil {
+		return 0, err
+	}
+	return res, nil
+}
+
+func loadRequiredString(sec *ini.Section, key string) (string, error) {
+	val, err := sec.GetKey(key)
+	if err != nil {
+		return "", err
+	}
+	res := strings.TrimSpace(val.String())
+	if res == "" {
+		return "", fmt.Errorf("%s cannot be empty", key)
+	}
+	return res, nil
+}
+
+func LoadDataSourceConfig(cfg *ini.File) (*DataSourceConfig, error) {
+	sec, err := cfg.GetSection("data_source")
+	if err != nil {
+		return nil, err
+	}
+
+	port, err := loadRequiredInt(sec, "port")
+	if err != nil {
+		return nil, err
+	}
+
+	dbPath, err := loadRequiredString(sec, "db_path")
+	if err != nil {
+		return nil, err
+	}
+
+	return &DataSourceConfig{
+		Port:   port,
+		DBPath: dbPath,
+	}, nil
+}
+
+func LoadRedisConfig(cfg *ini.File) (*RedisConfig, error) {
+	sec, err := cfg.GetSection("redis")
+	if err != nil {
+		return nil, err
+	}
+
+	host, err := loadRequiredString(sec, "host")
+	if err != nil {
+		return nil, err
+	}
+
+	port, err := loadRequiredInt(sec, "port")
+	if err != nil {
+		return nil, err
+	}
+
+	return &RedisConfig{
+		Host:     host,
+		Port:     port,
+		Password: strings.TrimSpace(sec.Key("password").String()),
+	}, nil
+}
--- a/datasource/controller/controller.go
+++ b/datasource/controller/controller.go
@@ -0,0 +1,71 @@
+package controller
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+	"net/http"
+	"strconv"
+
+	"datasource/store"
+)
+
+type Controller struct {
+	store *store.Store
+}
+
+func NewController(store *store.Store) *Controller {
+	return &Controller{store: store}
+}
+
+func (c *Controller) GetMetrics(w http.ResponseWriter, r *http.Request) {
+	query := r.URL.Query()
+
+	service := query.Get("service")
+	if service == "" {
+		http.Error(w, "service cannot be empty", http.StatusBadRequest)
+		return
+	}
+
+	t0, err := strconv.ParseInt(query.Get("t0"), 10, 64)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	t1, err := strconv.ParseInt(query.Get("t1"), 10, 64)
+	if err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	if t0 > t1 {
+		http.Error(w, "t0 cannot be larger than t1", http.StatusBadRequest)
+		return
+	}
+
+	metrics, err := c.store.GetMetrics(r.Context(), service, t0, t1)
+	if err != nil {
+		// todo (david): log internal server error
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	var buf bytes.Buffer
+
+	if err := json.NewEncoder(&buf).Encode(metrics); err != nil {
+		// todo (david): log internal server error
+		http.Error(w, err.Error(), http.StatusInternalServerError)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+
+	if _, err := io.Copy(w, &buf); err != nil {
+		// too late to return http.StatusInternalServerError
+		// todo (david): log internal server error
+	}
+}
+
+// todo (david)
+// func (c *Controller) DeleteMetrics(w http.ResponseWriter, r *http.Request) {}
--- a/datasource/go.mod
+++ b/datasource/go.mod
@@ -0,0 +1,36 @@
+module datasource
+
+go 1.24.2
+
+require (
+	github.com/duckdb/duckdb-go/v2 v2.5.5
+	github.com/redis/go-redis/v9 v9.17.3
+	gopkg.in/ini.v1 v1.67.1
+)
+
+require (
+	github.com/apache/arrow-go/v18 v18.5.1 // indirect
+	github.com/cespare/xxhash/v2 v2.3.0 // indirect
+	github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f // indirect
+	github.com/duckdb/duckdb-go-bindings v0.3.3 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.3.3 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.3.3 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.3.3 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.3.3 // indirect
+	github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.3.3 // indirect
+	github.com/go-viper/mapstructure/v2 v2.5.0 // indirect
+	github.com/goccy/go-json v0.10.5 // indirect
+	github.com/google/flatbuffers v25.12.19+incompatible // indirect
+	github.com/google/uuid v1.6.0 // indirect
+	github.com/klauspost/compress v1.18.3 // indirect
+	github.com/klauspost/cpuid/v2 v2.3.0 // indirect
+	github.com/pierrec/lz4/v4 v4.1.25 // indirect
+	github.com/zeebo/xxh3 v1.1.0 // indirect
+	golang.org/x/exp v0.0.0-20260112195511-716be5621a96 // indirect
+	golang.org/x/mod v0.32.0 // indirect
+	golang.org/x/sync v0.19.0 // indirect
+	golang.org/x/sys v0.40.0 // indirect
+	golang.org/x/telemetry v0.0.0-20260116145544-c6413dc483f5 // indirect
+	golang.org/x/tools v0.41.0 // indirect
+	golang.org/x/xerrors v0.0.0-20240903120638-7835f813f4da // indirect
+)
--- a/datasource/go.sum
+++ b/datasource/go.sum
@@ -0,0 +1,96 @@
+github.com/andybalholm/brotli v1.2.0 h1:ukwgCxwYrmACq68yiUqwIWnGY0cTPox/M94sVwToPjQ=
+github.com/andybalholm/brotli v1.2.0/go.mod h1:rzTDkvFWvIrjDXZHkuS16NPggd91W3kUSvPlQ1pLaKY=
+github.com/apache/arrow-go/v18 v18.5.1 h1:yaQ6zxMGgf9YCYw4/oaeOU3AULySDlAYDOcnr4LdHdI=
+github.com/apache/arrow-go/v18 v18.5.1/go.mod h1:OCCJsmdq8AsRm8FkBSSmYTwL/s4zHW9CqxeBxEytkNE=
+github.com/apache/thrift v0.22.0 h1:r7mTJdj51TMDe6RtcmNdQxgn9XcyfGDOzegMDRg47uc=
+github.com/apache/thrift v0.22.0/go.mod h1:1e7J/O1Ae6ZQMTYdy9xa3w9k+XHWPfRvdPyJeynQ+/g=
+github.com/bsm/ginkgo/v2 v2.12.0 h1:Ny8MWAHyOepLGlLKYmXG4IEkioBysk6GpaRTLC8zwWs=
+github.com/bsm/ginkgo/v2 v2.12.0/go.mod h1:SwYbGRRDovPVboqFv0tPTcG1sN61LM1Z4ARdbAV9g4c=
+github.com/bsm/gomega v1.27.10 h1:yeMWxP2pV2fG3FgAODIY8EiRE3dy0aeFYt4l7wh6yKA=
+github.com/bsm/gomega v1.27.10/go.mod h1:JyEr/xRbxbtgWNi8tIEVPUYZ5Dzef52k01W3YH0H+O0=
+github.com/cespare/xxhash/v2 v2.3.0 h1:UL815xU9SqsFlibzuggzjXhog7bL6oX9BbNZnL2UFvs=
+github.com/cespare/xxhash/v2 v2.3.0/go.mod h1:VGX0DQ3Q6kWi7AoAeZDth3/j3BFtOZR5XLFGgcrjCOs=
+github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc h1:U9qPSI2PIWSS1VwoXQT9A3Wy9MM3WgvqSxFWenqJduM=
+github.com/davecgh/go-spew v1.1.2-0.20180830191138-d8f796af33cc/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f h1:lO4WD4F/rVNCu3HqELle0jiPLLBs70cWOduZpkS1E78=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
+github.com/duckdb/duckdb-go-bindings v0.3.3 h1:lXogtCY8hiGLQvTfK55HcgvaA3K2MrwKeZGqhIin35U=
+github.com/duckdb/duckdb-go-bindings v0.3.3/go.mod h1:zS7OpBP8zwVlP38OljRZOnqWYlNd4KLcVfMoA1JFzpk=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.3.3 h1:ue8BtIOSt+2Bt2fEfTAvBcQLxzBFhgfCcyzPtqQWTRA=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-amd64 v0.3.3/go.mod h1:EnAvZh1kNJHp5yF+M1ZHNEvapnmt6anq1xXHVrAGqMo=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.3.3 h1:2TrSeTgtwi3WIvub9ba0mny+AClSNo1w0Ghszc2B8lQ=
+github.com/duckdb/duckdb-go-bindings/lib/darwin-arm64 v0.3.3/go.mod h1:IGLSeEcFhNeZF16aVjQCULD7TsFZKG5G7SyKJAXKp5c=
+github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.3.3 h1:GN0cexhfE7uLb7qgDmsYG324wKF15nW+O7v5+NGalS4=
+github.com/duckdb/duckdb-go-bindings/lib/linux-amd64 v0.3.3/go.mod h1:KAIynZ0GHCS7X5fRyuFnQMg/SZBPK/bS9OCOVojClxw=
+github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.3.3 h1:bIJV+ct6yvMXjy+N3bfILFd0fkTK50AUhUTerkY40/8=
+github.com/duckdb/duckdb-go-bindings/lib/linux-arm64 v0.3.3/go.mod h1:81SGOYoEUs8qaAfSk1wRfM5oobrIJ5KI7AzYhK6/bvQ=
+github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.3.3 h1:SK2sunA/MPb2T3113iFzHv6DWeu+qrsw0DizTFrvM+Q=
+github.com/duckdb/duckdb-go-bindings/lib/windows-amd64 v0.3.3/go.mod h1:K25pJL26ARblGDeuAkrdblFvUen92+CwksLtPEHRqqQ=
+github.com/duckdb/duckdb-go/v2 v2.5.5 h1:TlK8ipnzoKW2aNrjGqRkFWLCDpJDxR/VwH8ezEcvVhw=
+github.com/duckdb/duckdb-go/v2 v2.5.5/go.mod h1:6uIbC3gz36NCEygECzboygOo/Z9TeVwox/puG+ohWV0=
+github.com/go-viper/mapstructure/v2 v2.5.0 h1:vM5IJoUAy3d7zRSVtIwQgBj7BiWtMPfmPEgAXnvj1Ro=
+github.com/go-viper/mapstructure/v2 v2.5.0/go.mod h1:oJDH3BJKyqBA2TXFhDsKDGDTlndYOZ6rGS0BRZIxGhM=
+github.com/goccy/go-json v0.10.5 h1:Fq85nIqj+gXn/S5ahsiTlK3TmC85qgirsdTP/+DeaC4=
+github.com/goccy/go-json v0.10.5/go.mod h1:oq7eo15ShAhp70Anwd5lgX2pLfOS3QCiwU/PULtXL6M=
+github.com/golang/snappy v1.0.0 h1:Oy607GVXHs7RtbggtPBnr2RmDArIsAefDwvrdWvRhGs=
+github.com/golang/snappy v1.0.0/go.mod h1:/XxbfmMg8lxefKM7IXC3fBNl/7bRcc72aCRzEWrmP2Q=
+github.com/google/flatbuffers v25.12.19+incompatible h1:haMV2JRRJCe1998HeW/p0X9UaMTK6SDo0ffLn2+DbLs=
+github.com/google/flatbuffers v25.12.19+incompatible/go.mod h1:1AeVuKshWv4vARoZatz6mlQ0JxURH0Kv5+zNeJKJCa8=
+github.com/google/go-cmp v0.6.0 h1:ofyhxvXcZhMsU5ulbFiLKl/XBFqE1GSq7atu8tAmTRI=
+github.com/google/go-cmp v0.6.0/go.mod h1:17dUlkBOakJ0+DkrSSNjCkIjxS6bF9zb3elmeNGIjoY=
+github.com/google/uuid v1.6.0 h1:NIvaJDMOsjHA8n1jAhLSgzrAzy1Hgr+hNrb57e+94F0=
+github.com/google/uuid v1.6.0/go.mod h1:TIyPZe4MgqvfeYDBFedMoGGpEw/LqOeaOT+nhxU+yHo=
+github.com/klauspost/asmfmt v1.3.2 h1:4Ri7ox3EwapiOjCki+hw14RyKk201CN4rzyCJRFLpK4=
+github.com/klauspost/asmfmt v1.3.2/go.mod h1:AG8TuvYojzulgDAMCnYn50l/5QV3Bs/tp6j0HLHbNSE=
+github.com/klauspost/compress v1.18.3 h1:9PJRvfbmTabkOX8moIpXPbMMbYN60bWImDDU7L+/6zw=
+github.com/klauspost/compress v1.18.3/go.mod h1:R0h/fSBs8DE4ENlcrlib3PsXS61voFxhIs2DeRhCvJ4=
+github.com/klauspost/cpuid/v2 v2.3.0 h1:S4CRMLnYUhGeDFDqkGriYKdfoFlDnMtqTiI/sFzhA9Y=
+github.com/klauspost/cpuid/v2 v2.3.0/go.mod h1:hqwkgyIinND0mEev00jJYCxPNVRVXFQeu1XKlok6oO0=
+github.com/minio/asm2plan9s v0.0.0-20200509001527-cdd76441f9d8 h1:AMFGa4R4MiIpspGNG7Z948v4n35fFGB3RR3G/ry4FWs=
+github.com/minio/asm2plan9s v0.0.0-20200509001527-cdd76441f9d8/go.mod h1:mC1jAcsrzbxHt8iiaC+zU4b1ylILSosueou12R++wfY=
+github.com/minio/c2goasm v0.0.0-20190812172519-36a3d3bbc4f3 h1:+n/aFZefKZp7spd8DFdX7uMikMLXX4oubIzJF4kv/wI=
+github.com/minio/c2goasm v0.0.0-20190812172519-36a3d3bbc4f3/go.mod h1:RagcQ7I8IeTMnF8JTXieKnO4Z6JCsikNEzj0DwauVzE=
+github.com/pierrec/lz4/v4 v4.1.25 h1:kocOqRffaIbU5djlIBr7Wh+cx82C0vtFb0fOurZHqD0=
+github.com/pierrec/lz4/v4 v4.1.25/go.mod h1:EoQMVJgeeEOMsCqCzqFm2O0cJvljX2nGZjcRIPL34O4=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2 h1:Jamvg5psRIccs7FGNTlIRMkT8wgtp5eCXdBlqhYGL6U=
+github.com/pmezard/go-difflib v1.0.1-0.20181226105442-5d4384ee4fb2/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/redis/go-redis/v9 v9.17.3 h1:fN29NdNrE17KttK5Ndf20buqfDZwGNgoUr9qjl1DQx4=
+github.com/redis/go-redis/v9 v9.17.3/go.mod h1:u410H11HMLoB+TP67dz8rL9s6QW2j76l0//kSOd3370=
+github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
+github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw=
+github.com/stretchr/objx v0.5.0/go.mod h1:Yh+to48EsGEfYuaHDzXPcE3xhTkx73EhmCGUpEOglKo=
+github.com/stretchr/objx v0.5.2/go.mod h1:FRsXN1f5AsAjCGJKqEizvkpNtU+EGNCLh3NxZ/8L+MA=
+github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
+github.com/stretchr/testify v1.8.0/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU=
+github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+github.com/zeebo/assert v1.3.0 h1:g7C04CbJuIDKNPFHmsk4hwZDO5O+kntRxzaUoNXj+IQ=
+github.com/zeebo/assert v1.3.0/go.mod h1:Pq9JiuJQpG8JLJdtkwrJESF0Foym2/D9XMU5ciN/wJ0=
+github.com/zeebo/xxh3 v1.1.0 h1:s7DLGDK45Dyfg7++yxI0khrfwq9661w9EN78eP/UZVs=
+github.com/zeebo/xxh3 v1.1.0/go.mod h1:IisAie1LELR4xhVinxWS5+zf1lA4p0MW4T+w+W07F5s=
+golang.org/x/exp v0.0.0-20260112195511-716be5621a96 h1:Z/6YuSHTLOHfNFdb8zVZomZr7cqNgTJvA8+Qz75D8gU=
+golang.org/x/exp v0.0.0-20260112195511-716be5621a96/go.mod h1:nzimsREAkjBCIEFtHiYkrJyT+2uy9YZJB7H1k68CXZU=
+golang.org/x/mod v0.32.0 h1:9F4d3PHLljb6x//jOyokMv3eX+YDeepZSEo3mFJy93c=
+golang.org/x/mod v0.32.0/go.mod h1:SgipZ/3h2Ci89DlEtEXWUk/HteuRin+HHhN+WbNhguU=
+golang.org/x/sync v0.19.0 h1:vV+1eWNmZ5geRlYjzm2adRgW2/mcpevXNg50YZtPCE4=
+golang.org/x/sync v0.19.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
+golang.org/x/sys v0.40.0 h1:DBZZqJ2Rkml6QMQsZywtnjnnGvHza6BTfYFWY9kjEWQ=
+golang.org/x/sys v0.40.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
+golang.org/x/telemetry v0.0.0-20260116145544-c6413dc483f5 h1:i0p03B68+xC1kD2QUO8JzDTPXCzhN56OLJ+IhHY8U3A=
+golang.org/x/telemetry v0.0.0-20260116145544-c6413dc483f5/go.mod h1:b7fPSJ0pKZ3ccUh8gnTONJxhn3c/PS6tyzQvyqw4iA8=
+golang.org/x/tools v0.41.0 h1:a9b8iMweWG+S0OBnlU36rzLp20z1Rp10w+IY2czHTQc=
+golang.org/x/tools v0.41.0/go.mod h1:XSY6eDqxVNiYgezAVqqCeihT4j1U2CCsqvH3WhQpnlg=
+golang.org/x/xerrors v0.0.0-20240903120638-7835f813f4da h1:noIWHXmPHxILtqtCOPIhSt0ABwskkZKjD3bXGnZGpNY=
+golang.org/x/xerrors v0.0.0-20240903120638-7835f813f4da/go.mod h1:NDW/Ps6MPRej6fsCIbMTohpP40sJ/P/vI1MoTEGwX90=
+gonum.org/v1/gonum v0.16.0 h1:5+ul4Swaf3ESvrOnidPp4GZbzf0mxVQpDCYUQE7OJfk=
+gonum.org/v1/gonum v0.16.0/go.mod h1:fef3am4MQ93R2HHpKnLk4/Tbh/s0+wqD5nfa6Pnwy4E=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/ini.v1 v1.67.1 h1:tVBILHy0R6e4wkYOn3XmiITt/hEVH4TFMYvAX2Ytz6k=
+gopkg.in/ini.v1 v1.67.1/go.mod h1:x/cyOwCgZqOkJoDIJ3c1KNHMo10+nLGAhh+kn3Zizss=
+gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
--- a/datasource/main.go
+++ b/datasource/main.go
@@ -0,0 +1,109 @@
+package main
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"log"
+	"net/http"
+	"os"
+	"os/signal"
+	"sync"
+	"syscall"
+	"time"
+
+	_ "github.com/duckdb/duckdb-go/v2"
+	"gopkg.in/ini.v1"
+
+	"datasource/collector"
+	"datasource/config"
+	"datasource/controller"
+	"datasource/store"
+)
+
+func main() {
+	// todo (david): init logger
+
+	var wg sync.WaitGroup
+	defer wg.Wait()
+
+	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt, syscall.SIGTERM)
+	defer stop()
+
+	cfg, err := ini.Load("./config.ini")
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	dataSourceConfig, err := config.LoadDataSourceConfig(cfg)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	store, err := store.NewStore(dataSourceConfig.DBPath)
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer store.Close()
+
+	redisConfig, err := config.LoadRedisConfig(cfg)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	redisCollector := collector.NewRedisCollector(redisConfig, store)
+	defer redisCollector.Close()
+
+	collectors := []collector.Collector{redisCollector}
+
+	for _, collector := range collectors {
+		wg.Add(1)
+		go func() {
+			defer wg.Done()
+
+			ticker := time.NewTicker(5 * time.Second)
+			defer ticker.Stop()
+
+			for {
+				select {
+				case <-ctx.Done():
+					return
+				case <-ticker.C:
+					if err := collector.Collect(ctx); err != nil {
+						log.Printf("failed to collect: %v", err)
+					}
+				}
+			}
+		}()
+	}
+
+	controller := controller.NewController(store)
+
+	mux := http.NewServeMux()
+	mux.HandleFunc("GET /api/v1/metrics", controller.GetMetrics)
+	// todo (david)
+	// mux.HandleFunc("DELETE /api/v1/metrics", controller.DeleteMetrics)
+
+	srv := &http.Server{
+		Addr:    fmt.Sprintf("0.0.0.0:%d", dataSourceConfig.Port),
+		Handler: mux,
+	}
+
+	wg.Add(1)
+	go func() {
+		defer wg.Done()
+		if err := srv.ListenAndServe(); err != nil && !errors.Is(err, http.ErrServerClosed) {
+			log.Fatalf("http.ListenAndServe: %v\n", err)
+		}
+	}()
+
+	<-ctx.Done()
+
+	srv.Shutdown(context.Background())
+
+	srvShutdownCtx, cancel := context.WithTimeout(context.Background(), 10*time.Second)
+	defer cancel()
+	if err := srv.Shutdown(srvShutdownCtx); err != nil {
+		log.Fatalf("srv.Shutdown: %v", err)
+	}
+}
--- a/datasource/store/duckdb.go
+++ b/datasource/store/duckdb.go
@@ -0,0 +1,124 @@
+package store
+
+import (
+	"context"
+	"database/sql"
+
+	"datasource/types"
+)
+
+type Store struct {
+	db *sql.DB
+}
+
+func NewStore(dbPath string) (*Store, error) {
+	db, err := sql.Open("duckdb", dbPath)
+	if err != nil {
+		return nil, err
+	}
+
+	// keep one connection ready for collector's next tick
+	db.SetMaxIdleConns(1)
+
+	// force sequential access to prevent DuckDB locking errors
+	db.SetMaxOpenConns(1)
+
+	migrationQuery := `
+		CREATE TABLE IF NOT EXISTS metrics (
+			service VARCHAR,
+			timestamp_sec BIGINT,
+			up INTEGER,
+			uptime_sec BIGINT,
+			memory_usage_bytes BIGINT
+		)`
+
+	if _, err := db.Exec(migrationQuery); err != nil {
+		return nil, err
+	}
+
+	return &Store{db: db}, nil
+}
+
+func (s *Store) Close() error {
+	return s.db.Close()
+}
+
+func (s *Store) SaveMetric(ctx context.Context, metric *types.Metric) error {
+	query := `
+		INSERT INTO metrics (
+			service,
+			timestamp_sec,
+			up,
+			uptime_sec,
+			memory_usage_bytes
+		) VALUES (?, ?, ?, ?, ?)`
+
+	_, err := s.db.ExecContext(ctx, query,
+		metric.Service,
+		metric.TimestampSec,
+		metric.Up,
+		metric.UptimeSec,
+		metric.MemoryUsageBytes,
+	)
+
+	return err
+}
+
+func (s *Store) GetMetrics(ctx context.Context, service string, t0, t1 int64) ([]*types.Metric, error) {
+	query := `
+		SELECT
+			timestamp_sec,
+			up,
+			uptime_sec,
+			memory_usage_bytes
+		FROM metrics
+		WHERE
+			service = ? AND
+			timestamp_sec BETWEEN ? AND ?
+		ORDER BY timestamp_sec`
+
+	rows, err := s.db.QueryContext(ctx, query, service, t0, t1)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var metrics []*types.Metric
+
+	for rows.Next() {
+		metric := &types.Metric{Service: service}
+		if err := rows.Scan(&metric.TimestampSec, &metric.Up, &metric.UptimeSec, &metric.MemoryUsageBytes); err != nil {
+			return nil, err
+		}
+		metrics = append(metrics, metric)
+	}
+
+	return metrics, nil
+}
+
+func (s *Store) GetAllMetrics(ctx context.Context) ([]*types.Metric, error) {
+	query := "SELECT service, timestamp_sec, up, uptime_sec, memory_usage_bytes FROM metrics"
+
+	rows, err := s.db.QueryContext(ctx, query)
+	if err != nil {
+		return nil, err
+	}
+	defer rows.Close()
+
+	var metrics []*types.Metric
+
+	for rows.Next() {
+		metric := new(types.Metric)
+		if err := rows.Scan(&metric.Service, &metric.TimestampSec, &metric.Up, &metric.UptimeSec, &metric.MemoryUsageBytes); err != nil {
+			return nil, err
+		}
+		metrics = append(metrics, metric)
+	}
+
+	return metrics, nil
+}
+
+// todo (david)
+// func (s *Store) DeleteMetrics(ctx context.Context, t0, t1 int64) error {
+// 	return nil
+// }
--- a/datasource/types/types.go
+++ b/datasource/types/types.go
@@ -0,0 +1,9 @@
+package types
+
+type Metric struct {
+	Service          string `json:"service"`
+	TimestampSec     int64  `json:"timestamp_sec"` // unix epoch
+	Up               int    `json:"up"`            // 0: down, 1: healthy
+	UptimeSec        int64  `json:"uptime_sec"`
+	MemoryUsageBytes int64  `json:"memory_usage_bytes"`
+}
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -0,0 +1,26 @@
+services:
+  datasource:
+    build: ./datasource
+    network_mode: host
+    volumes:
+      - ./datasource/config.ini:/app/config.ini:ro
+      - ./v/datasource/data:/app/data
+    restart: unless-stopped
+
+  grafana:
+    image: grafana/grafana:12.3.2
+    user: 1000:1000
+    environment:
+      - GF_PLUGINS_PREINSTALL_SYNC=yesoreyeram-infinity-datasource@3.7.0
+      - GF_SECURITY_ADMIN_USER=pika
+      - GF_SECURITY_ADMIN_PASSWORD=boingboing
+    network_mode: host
+    volumes:
+      - ./v/grafana:/var/lib/grafana
+    restart: unless-stopped
+
+  # redis:
+  #   image: redis:8.0.3-alpine3.21
+  #   ports:
+  #     - 127.0.0.1:6379:6379
+  #   restart: unless-stopped