feat(cluster): PG Logical Replication setup + Master-Key-Sync + Firewall-Ports
cluster-init-replication: - listen_addresses = '*' damit Cluster-Peers PG auf :5432 erreichen können - max_replication_slots = 20 / max_wal_senders = 10 (verhindert Slot-Erschöpfung bei initaler Tabellen-Synchronisation mit vielen gleichzeitigen Sync-Workern) - pg-replication-secret: Ownership an edgeguard-User (API-Lesezugriff) - detectPGConfig() statt hardcoded PG 16 (System läuft PG 17) cluster-setup-standby: - syncMasterKey(): holt /var/lib/edgeguard/.master_key via mTLS vom Primary — ohne identischen Master-Key können replizierte WireGuard-Keys nicht entschlüsselt werden - render-config: sudo -u edgeguard statt als root (DB-Zugriff) nftables Template: - Port 5432 (PG) + 6379 (KeyDB) für Cluster-Peers (@peer_ipv4/@peer_ipv6) freigegeben handlers/cluster.go: - GET /agent/cluster/master-key: gibt .master_key via mTLS zurück (hex-kodiert) v1.2.15 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
@@ -10,7 +10,9 @@ import (
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"net/http"
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"os"
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"os/exec"
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"os/user"
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"path/filepath"
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"strconv"
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"strings"
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"time"
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@@ -18,22 +20,55 @@ import (
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)
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const (
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pgVersion = "16"
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pgCluster = "main"
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pgDataDir = "/var/lib/postgresql/16/main"
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pgHBAPath = "/etc/postgresql/16/main/pg_hba.conf"
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pgConfD = "/etc/postgresql/16/main/conf.d"
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egReplSecret = "/var/lib/edgeguard/pg-replication-secret"
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egReplUser = "edgeguard_replicator"
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egPubName = "edgeguard_shared"
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egSubName = "edgeguard_sub"
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// Tabellen die NODE-SPEZIFISCH sind und NICHT repliziert werden.
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// Jede Node hat eigene Interfaces, IPs, Routen, VIP-Einstellungen,
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// Listener-Adressen, Token-Tracking und Audit-Log.
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// Analog zu OPNsense: Interface-IPs und Hostname bleiben immer lokal.
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)
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// pgConfig hält die zur Laufzeit erkannten PG-Pfade.
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type pgConfig struct {
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Version string // z.B. "17"
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Cluster string // z.B. "main"
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DataDir string // /var/lib/postgresql/17/main
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HBAPath string // /etc/postgresql/17/main/pg_hba.conf
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ConfD string // /etc/postgresql/17/main/conf.d
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}
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// detectPGConfig ermittelt Version, Cluster und Pfade aus der laufenden
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// PG-Instanz via SHOW hba_file / SHOW data_directory. Damit ist der Code
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// unabhängig von der PG-Hauptversion (16, 17, …).
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func detectPGConfig() (pgConfig, error) {
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hbaRaw, err := psqlRun([]string{"-tA", "-c", "SHOW hba_file;"})
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if err != nil {
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return pgConfig{}, fmt.Errorf("cannot detect pg hba_file: %w", err)
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}
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hbaPath := strings.TrimSpace(string(hbaRaw))
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dataRaw, err := psqlRun([]string{"-tA", "-c", "SHOW data_directory;"})
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if err != nil {
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return pgConfig{}, fmt.Errorf("cannot detect pg data_directory: %w", err)
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}
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dataDir := strings.TrimSpace(string(dataRaw))
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// hbaPath: /etc/postgresql/<version>/<cluster>/pg_hba.conf
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parts := strings.Split(filepath.ToSlash(hbaPath), "/")
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if len(parts) < 6 {
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return pgConfig{}, fmt.Errorf("unexpected hba_file path: %s", hbaPath)
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}
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version := parts[3]
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cluster := parts[4]
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confD := filepath.Join("/etc/postgresql", version, cluster, "conf.d")
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return pgConfig{
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Version: version,
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Cluster: cluster,
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DataDir: dataDir,
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HBAPath: hbaPath,
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ConfD: confD,
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}, nil
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}
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// localOnlyTables listet alle Tabellen die nicht in die Replikations-
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// Publication aufgenommen werden. Alles andere wird automatisch repliziert.
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var localOnlyTables = []string{
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@@ -70,6 +105,13 @@ func cmdClusterInitReplication(args []string) int {
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return 2
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}
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pg, err := detectPGConfig()
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if err != nil {
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fmt.Fprintln(os.Stderr, "cluster-init-replication: PG-Erkennung:", err)
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return 1
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}
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fmt.Printf("→ PostgreSQL %s/%s erkannt\n", pg.Version, pg.Cluster)
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// 1. Passwort generieren
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pass, err := generatePassword(32)
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if err != nil {
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@@ -102,24 +144,34 @@ $$`, egReplUser, egReplUser, pass, egReplUser, pass)
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fmt.Fprintln(os.Stderr, "cluster-init-replication: write secret:", err)
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return 1
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}
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// Ownership an edgeguard-api-User übergeben damit die API lesen kann
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if u, err := user.Lookup("edgeguard"); err == nil {
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uid, _ := strconv.Atoi(u.Uid)
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gid, _ := strconv.Atoi(u.Gid)
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_ = os.Chown(egReplSecret, uid, gid)
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}
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fmt.Printf("✓ Replication-Secret gespeichert: %s\n", egReplSecret)
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// 4. conf.d/edgeguard-replication.conf schreiben
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// wal_level=logical ist eine Obermenge von replica — unterstützt
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// sowohl Logical Replication als auch ggfs. physisches WAL-Archiving.
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if err := os.MkdirAll(pgConfD, 0o755); err != nil {
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if err := os.MkdirAll(pg.ConfD, 0o755); err != nil {
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fmt.Fprintln(os.Stderr, "cluster-init-replication: conf.d mkdir:", err)
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return 1
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}
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replConf := `# EdgeGuard Logical Replication — automatisch generiert
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# Nicht manuell bearbeiten; wird von edgeguard-ctl cluster-init-replication verwaltet.
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wal_level = logical
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max_wal_senders = 5
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max_replication_slots = 5
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max_wal_senders = 10
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max_replication_slots = 20
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max_logical_replication_workers = 4
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wal_keep_size = 512MB
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# Lausche auf localhost + alle konfigurierten Interfaces damit Cluster-Peers
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# sich verbinden können. '*' ist sicher weil pg_hba.conf den Zugriff auf
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# bekannte Replikations-User beschränkt.
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listen_addresses = '*'
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`
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confPath := filepath.Join(pgConfD, "edgeguard-replication.conf")
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confPath := filepath.Join(pg.ConfD, "edgeguard-replication.conf")
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if err := os.WriteFile(confPath, []byte(replConf), 0o644); err != nil {
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fmt.Fprintln(os.Stderr, "cluster-init-replication: write postgresql conf:", err)
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return 1
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@@ -127,18 +179,18 @@ wal_keep_size = 512MB
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fmt.Printf("✓ %s geschrieben (wal_level=logical)\n", confPath)
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// 5. pg_hba.conf aktualisieren
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if err := ensureHBAReplication(); err != nil {
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if err := ensureHBAReplication(pg.HBAPath); err != nil {
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fmt.Fprintln(os.Stderr, "cluster-init-replication: pg_hba.conf:", err)
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return 1
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}
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fmt.Printf("✓ %s aktualisiert\n", pgHBAPath)
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fmt.Printf("✓ %s aktualisiert\n", pg.HBAPath)
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// 6. PG reload (damit wal_level + pg_hba aktiv werden)
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if out, err := exec.Command("pg_ctlcluster", pgVersion, pgCluster, "reload").CombinedOutput(); err != nil {
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if out, err := exec.Command("pg_ctlcluster", pg.Version, pg.Cluster, "reload").CombinedOutput(); err != nil {
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fmt.Fprintf(os.Stderr, "cluster-init-replication: pg reload failed: %v\n%s\n", err, out)
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return 1
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}
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fmt.Printf("✓ PostgreSQL %s/%s neu geladen\n", pgVersion, pgCluster)
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fmt.Printf("✓ PostgreSQL %s/%s neu geladen\n", pg.Version, pg.Cluster)
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// 7. SELECT-Grants: edgeguard_replicator muss alle zu replizierenden
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// Tabellen lesen können. DEFAULT PRIVILEGES sichert zukünftige Tabellen.
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@@ -213,8 +265,8 @@ func createPublication() error {
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// in pg_hba.conf ein. Für Logical Replication brauchen wir einen
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// normalen "host edgeguard"-Eintrag (nicht "host replication").
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// Idempotent via Marker-Kommentar.
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func ensureHBAReplication() error {
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data, err := os.ReadFile(pgHBAPath)
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func ensureHBAReplication(hbaPath string) error {
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data, err := os.ReadFile(hbaPath)
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if err != nil {
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return fmt.Errorf("read: %w", err)
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}
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@@ -222,16 +274,14 @@ func ensureHBAReplication() error {
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if strings.Contains(string(data), marker) {
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return nil
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}
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// Logical Replication: Subscriber verbindet sich auf die DB (nicht "replication"-Typ)
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// Physical/WAL-Archiving: "replication"-Typ bleibt für Kompatibilität
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entry := fmt.Sprintf(`
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%s
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host edgeguard %s 0.0.0.0/0 scram-sha-256
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host edgeguard %s ::/0 scram-sha-256
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host edgeguard %s 0.0.0.0/0 scram-sha-256
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host edgeguard %s ::/0 scram-sha-256
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host replication %s 0.0.0.0/0 scram-sha-256
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host replication %s ::/0 scram-sha-256
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`, marker, egReplUser, egReplUser, egReplUser, egReplUser)
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f, err := os.OpenFile(pgHBAPath, os.O_APPEND|os.O_WRONLY, 0o640)
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f, err := os.OpenFile(hbaPath, os.O_APPEND|os.O_WRONLY, 0o640)
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if err != nil {
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return fmt.Errorf("open: %w", err)
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}
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@@ -345,11 +395,19 @@ WHERE srsubid = (SELECT oid FROM pg_subscription WHERE subname = '%s')
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}
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}
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// 5. render-config ausführen
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// 5. Master-Key vom Primary holen — für WireGuard-Key-Entschlüsselung
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fmt.Println("→ Secrets Master-Key vom Primary synchronisieren...")
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if err := syncMasterKey(primaryHost, *agentPort, *tlsDir); err != nil {
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fmt.Fprintf(os.Stderr, "cluster-setup-standby: master-key: %v (WireGuard-Keys können nicht entschlüsselt werden)\n", err)
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} else {
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fmt.Println("✓ Master-Key synchronisiert")
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}
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// 6. render-config ausführen — muss als edgeguard-User laufen (DB-Zugriff)
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fmt.Println("→ Service-Configs neu rendern...")
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if out, err := exec.Command("edgeguard-ctl", "render-config", "--no-reload").CombinedOutput(); err != nil {
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if out, err := exec.Command("sudo", "-u", "edgeguard", "edgeguard-ctl", "render-config").CombinedOutput(); err != nil {
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fmt.Fprintf(os.Stderr, "cluster-setup-standby: render-config: %v\n%s\n", err, out)
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fmt.Println(" → Manuell nachholen: edgeguard-ctl render-config")
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fmt.Println(" → Manuell nachholen: sudo -u edgeguard edgeguard-ctl render-config")
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} else {
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fmt.Print(string(out))
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fmt.Println("✓ Service-Configs aktualisiert")
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@@ -429,6 +487,66 @@ func fetchReplicationCreds(host string, agentPort int, tlsDir string) (*pgReplic
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return &result.Data, nil
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}
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// syncMasterKey holt den Secrets-Master-Key vom Primary via mTLS und schreibt
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// ihn nach /var/lib/edgeguard/.master_key. Dadurch können replizierte
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// verschlüsselte WireGuard-Keys und PSKs auf dem Secondary entschlüsselt werden.
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func syncMasterKey(host string, agentPort int, tlsDir string) error {
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caPath := filepath.Join(tlsDir, "ca.crt")
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certPath := filepath.Join(tlsDir, "peer.crt")
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keyPath := filepath.Join(tlsDir, "peer.key")
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caCert, err := os.ReadFile(caPath)
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if err != nil {
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return fmt.Errorf("read ca.crt: %w", err)
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}
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rootPool := x509.NewCertPool()
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rootPool.AppendCertsFromPEM(caCert)
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cert, err := tls.LoadX509KeyPair(certPath, keyPath)
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if err != nil {
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return fmt.Errorf("load peer cert: %w", err)
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}
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client := &http.Client{
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Timeout: 15 * time.Second,
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Transport: &http.Transport{
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TLSClientConfig: &tls.Config{
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RootCAs: rootPool,
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Certificates: []tls.Certificate{cert},
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},
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},
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}
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url := fmt.Sprintf("https://%s:%d/agent/cluster/master-key", host, agentPort)
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resp, err := client.Get(url)
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if err != nil {
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return fmt.Errorf("GET %s: %w", url, err)
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}
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defer resp.Body.Close()
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if resp.StatusCode != http.StatusOK {
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return fmt.Errorf("GET %s: HTTP %d", url, resp.StatusCode)
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}
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var result struct {
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Data struct {
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KeyHex string `json:"key_hex"`
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} `json:"data"`
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}
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if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
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return fmt.Errorf("decode response: %w", err)
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}
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key := make([]byte, 32)
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if _, err := fmt.Sscanf(result.Data.KeyHex, "%x", &key); err != nil {
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return fmt.Errorf("decode key_hex: %w", err)
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}
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const masterKeyPath = "/var/lib/edgeguard/.master_key"
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if err := os.WriteFile(masterKeyPath, key, 0o600); err != nil {
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return fmt.Errorf("write master key: %w", err)
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}
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if u, err := user.Lookup("edgeguard"); err == nil {
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uid, _ := strconv.Atoi(u.Uid)
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gid, _ := strconv.Atoi(u.Gid)
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_ = os.Chown(masterKeyPath, uid, gid)
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}
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return nil
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}
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// generatePassword erzeugt ein kryptographisch sicheres Passwort.
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func generatePassword(n int) (string, error) {
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const charset = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"
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