commit 93a78a22e2bec74c504a8b3d2b4fdf51adaee42f · seiso.moe/hestia

.gitignore

This is a binary file and will not be displayed.

+7

README.md

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       Hestia

     

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       An uptime monitor.

     

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       # Building

     

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       `go build -o hestia ./cmd/hestia/main.go`

+37

check/check.go

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       package check

     

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       import (

     

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       	"fmt"

     

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       	"io"

     

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       	"net/http"

     

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       	"regexp"

     

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       	"time"

     

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       )

     

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       type Check struct {

     

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       	Name     string `toml:"name"`

     

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       	Type     string `toml:"type"`

     

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       	URL      string `toml:"url,omitempty"`

     

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       	Expect   string `toml:"expect"`

     

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       	Interval int    `toml:"interval"`

     

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       }

     

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       func CheckHTTP(c Check) (string, string, time.Duration) {

     

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       	start := time.Now()

     

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       	resp, err := http.Get(c.URL)

     

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       	duration := time.Since(start)

     

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       	if err != nil {

     

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       		return "fail", err.Error(), duration

     

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       	}

     

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       	defer resp.Body.Close()

     

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       	body, _ := io.ReadAll(resp.Body)

     

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       	matched, _ := regexp.Match(c.Expect, body)

     

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       	if resp.StatusCode == 200 && matched {

     

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       		return "ok", "matched", duration

     

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       	}

     

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       	return "fail", fmt.Sprintf("Status: %d, matched: %v", resp.StatusCode, matched), duration

     

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       }

+33

cmd/hestia/main.go

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       package main

     

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       import (

     

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       	"database/sql"

     

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       	_ "github.com/mattn/go-sqlite3"

     

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       	"log"

     

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       	"net/http"

     

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       	"time"

     

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       	"tangled.sh/seiso.moe/hestia/config"

     

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       	"tangled.sh/seiso.moe/hestia/scheduler"

     

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       	"tangled.sh/seiso.moe/hestia/storage"

     

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       	"tangled.sh/seiso.moe/hestia/web"

     

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       )

     

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       func main() {

     

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       	cfg, err := config.LoadConfig("/home/blu/git/kiri/hestia/config.toml")

     

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       	if err != nil {

     

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       		log.Fatal(err)

     

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       	}

     

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       	db, _ := sql.Open("sqlite3", "file:checks.db")

     

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       	_ = storage.InitDB(db)

     

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       	go scheduler.StartScheduler(cfg, db)

     

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       	go func() {

     

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       		for {

     

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       			time.Sleep(time.Hour)

     

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       			storage.CleanupOld(db, cfg.Retention)

     

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       		}

     

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       	}()

     

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       	http.ListenAndServe(":8080", web.Routes(db))

     

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       }

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config/config.go

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       package config

     

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       import (

     

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       	"github.com/BurntSushi/toml"

     

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       	"tangled.sh/seiso.moe/hestia/check"

     

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       )

     

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       type Config struct {

     

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       	Checks    []check.Check `toml:"check"`

     

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       	Retention int           `toml:"retention"`

     

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       }

     

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       func LoadConfig(path string) (*Config, error) {

     

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       	var cfg Config

     

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       	if _, err := toml.DecodeFile(path, &cfg); err != nil {

     

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       		return nil, err

     

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       	}

     

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       	return &cfg, nil

     

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       }

+10

go.mod

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       module tangled.sh/seiso.moe/hestia

     

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       go 1.24.4

     

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       require (

     

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       	github.com/BurntSushi/toml v1.5.0

     

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       	github.com/go-chi/chi/v5 v5.2.2

     

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       )

     

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       require github.com/mattn/go-sqlite3 v1.14.28

+6

go.sum

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       github.com/BurntSushi/toml v1.5.0 h1:W5quZX/G/csjUnuI8SUYlsHs9M38FC7znL0lIO+DvMg=

     

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       github.com/BurntSushi/toml v1.5.0/go.mod h1:ukJfTF/6rtPPRCnwkur4qwRxa8vTRFBF0uk2lLoLwho=

     

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       github.com/go-chi/chi/v5 v5.2.2 h1:CMwsvRVTbXVytCk1Wd72Zy1LAsAh9GxMmSNWLHCG618=

     

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       github.com/go-chi/chi/v5 v5.2.2/go.mod h1:L2yAIGWB3H+phAw1NxKwWM+7eUH/lU8pOMm5hHcoops=

     

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       github.com/mattn/go-sqlite3 v1.14.28 h1:ThEiQrnbtumT+QMknw63Befp/ce/nUPgBPMlRFEum7A=

     

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       github.com/mattn/go-sqlite3 v1.14.28/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=

+30

scheduler/scheduler.go

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       package scheduler

     

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       import (

     

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       	"database/sql"

     

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       	_ "github.com/mattn/go-sqlite3"

     

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       	"log"

     

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       	"time"

     

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       	"tangled.sh/seiso.moe/hestia/check"

     

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       	"tangled.sh/seiso.moe/hestia/config"

     

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       	"tangled.sh/seiso.moe/hestia/storage"

     

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       )

     

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       func StartScheduler(cfg *config.Config, db *sql.DB) {

     

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       	for _, ck := range cfg.Checks {

     

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       		go func(c check.Check) {

     

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       			ticker := time.NewTicker(time.Duration(c.Interval) * time.Second)

     

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       			for range ticker.C {

     

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       				log.Printf("running check: %s\n", c.Name)

     

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       				var status, message string

     

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       				var dur time.Duration

     

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       				status, message, dur = check.CheckHTTP(c)

     

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       				log.Printf("%s, %s, %s\n", status, message, dur)

     

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       				storage.StoreResult(db, c.Name, status, message, dur)

     

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       			}

     

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       		}(ck)

     

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       	}

     

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       }

+34

storage/sqlite.go

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       package storage

     

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       import (

     

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       	"database/sql"

     

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       	"fmt"

     

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       	"time"

     

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       )

     

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       func InitDB(db *sql.DB) error {

     

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       	_, err := db.Exec(`

     

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       		CREATE TABLE IF NOT EXISTS check_results (

     

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       			id INTEGER PRIMARY KEY,

     

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       			name TEXT,

     

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       			status TEXT,

     

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       			message TEXT,

     

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       			timestamp DATETIME,

     

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       			duration_ms INTEGER

     

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       		);

     

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       	`)

     

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       	return err

     

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       }

     

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       func CleanupOld(db *sql.DB, hours int) error {

     

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       	_, err := db.Exec(`DELETE FROM check_results WHERE timestamp < datetime('now', ?)`, fmt.Sprintf("-%dh", hours))

     

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       	return err

     

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       }

     

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       func StoreResult(db *sql.DB, name, status, message string, duration time.Duration) error {

     

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       	_, err := db.Exec(`

     

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               INSERT INTO check_results (name, status, message, timestamp, duration_ms)

     

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               VALUES (?, ?, ?, ?, ?)

     

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           `, name, status, message, time.Now(), duration.Milliseconds())

     

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       	return err

     

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       }

+68

web/handlers.go

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       package web

     

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       import (

     

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       	"database/sql"

     

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       	"fmt"

     

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       	"net/http"

     

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       	"strings"

     

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       	"github.com/go-chi/chi/v5"

     

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       )

     

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       func Routes(db *sql.DB) http.Handler {

     

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       	r := chi.NewRouter()

     

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       	r.Get("/", HandleDashboard(db))

     

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       	return r

     

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       }

     

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       func HandleDashboard(db *sql.DB) http.HandlerFunc {

     

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       	return func(w http.ResponseWriter, r *http.Request) {

     

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       		type Result struct {

     

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       			Name     string

     

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       			Statuses []string

     

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       		}

     

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       		rows, err := db.Query(`

     

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                   SELECT name, status

     

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                   FROM check_results

     

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                   ORDER BY timestamp DESC

     

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                   LIMIT 1000

     

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               `)

     

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       		if err != nil {

     

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       			http.Error(w, "DB error", 500)

     

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       			return

     

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       		}

     

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       		defer rows.Close()

     

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       		grouped := map[string][]string{}

     

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       		for rows.Next() {

     

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       			var name, status string

     

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       			if err := rows.Scan(&name, &status); err == nil {

     

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       				grouped[name] = append(grouped[name], status)

     

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       			}

     

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       		}

     

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       		var html strings.Builder

     

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       		html.WriteString(`<!DOCTYPE html><html><head><meta charset="utf-8"><title>Hestia</title></head><body style="font-family: sans-serif">`)

     

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       		html.WriteString(`<h1>Health Checks</h1>`)

     

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       		for name, statuses := range grouped {

     

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       			html.WriteString(fmt.Sprintf("<h2>%s</h2><div style='display: flex; gap: 2px;'>", name))

     

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       			for _, status := range statuses {

     

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       				color := "#4caf50"

     

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       				if status != "ok" {

     

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       					color = "#f44336"

     

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       				}

     

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       				html.WriteString(fmt.Sprintf(`<div title="%s" style="width: 10px; height: 20px; background: %s;"></div>`, status, color))

     

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       			}

     

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       			html.WriteString("</div>")

     

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       		}

     

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       		html.WriteString(`</body></html>`)

     

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       		w.Header().Set("Content-Type", "text/html")

     

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       		w.Write([]byte(html.String()))

     

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       	}

     

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       }