92 lines
2.7 KiB
Go
92 lines
2.7 KiB
Go
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package service
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import (
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"os"
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"path/filepath"
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"strconv"
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"strings"
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)
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// Settings configures the Metis service runtime.
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type Settings struct {
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BindAddr string
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InventoryPath string
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CacheDir string
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ArtifactDir string
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HistoryPath string
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SnapshotsPath string
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TargetsPath string
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DefaultFlashHost string
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FlashHosts []string
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LocalHost string
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AllowedUsers []string
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AllowedGroups []string
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MaxDeviceBytes int64
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}
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// FromEnv builds service settings with sensible defaults for local dev and in-cluster use.
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func FromEnv() Settings {
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dataDir := getenvDefault("METIS_DATA_DIR", "/var/lib/metis")
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localHost := getenvDefault("METIS_LOCAL_HOST", hostnameOr("unknown"))
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defaultFlashHost := getenvDefault("METIS_DEFAULT_FLASH_HOST", localHost)
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flashHosts := splitList(getenvDefault("METIS_FLASH_HOSTS", defaultFlashHost))
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return Settings{
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BindAddr: getenvDefault("METIS_BIND_ADDR", ":8080"),
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InventoryPath: getenvDefault("METIS_INVENTORY_PATH", "inventory.titan-rpi4.yaml"),
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CacheDir: getenvDefault("METIS_CACHE_DIR", filepath.Join(dataDir, "cache")),
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ArtifactDir: getenvDefault("METIS_ARTIFACT_DIR", filepath.Join(dataDir, "artifacts")),
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HistoryPath: getenvDefault("METIS_HISTORY_PATH", filepath.Join(dataDir, "history.jsonl")),
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SnapshotsPath: getenvDefault("METIS_SNAPSHOTS_PATH", filepath.Join(dataDir, "snapshots.json")),
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TargetsPath: getenvDefault("METIS_TARGETS_PATH", filepath.Join(dataDir, "targets.json")),
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DefaultFlashHost: defaultFlashHost,
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FlashHosts: flashHosts,
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LocalHost: localHost,
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AllowedUsers: splitList(getenvDefault("METIS_ALLOWED_USERS", "")),
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AllowedGroups: splitList(getenvDefault("METIS_ALLOWED_GROUPS", "admin,maintainer")),
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MaxDeviceBytes: getenvInt64("METIS_MAX_DEVICE_BYTES", 300000000000),
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}
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}
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func getenvDefault(key, fallback string) string {
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if value := strings.TrimSpace(os.Getenv(key)); value != "" {
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return value
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}
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return fallback
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}
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func getenvInt64(key string, fallback int64) int64 {
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raw := strings.TrimSpace(os.Getenv(key))
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if raw == "" {
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return fallback
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}
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value, err := strconv.ParseInt(raw, 10, 64)
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if err != nil {
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return fallback
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}
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return value
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}
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func splitList(raw string) []string {
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if strings.TrimSpace(raw) == "" {
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return nil
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}
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parts := strings.Split(raw, ",")
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result := make([]string, 0, len(parts))
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for _, part := range parts {
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part = strings.TrimSpace(part)
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if part == "" {
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continue
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}
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result = append(result, part)
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}
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return result
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}
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func hostnameOr(fallback string) string {
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name, err := os.Hostname()
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if err != nil || strings.TrimSpace(name) == "" {
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return fallback
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}
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return strings.TrimSpace(name)
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}
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