feat(firewall): improve error handling and documentation for firewall enrollment

Enhanced the firewall enrollment process by implementing better error handling for HTTP responses, specifically addressing database schema issues. Updated the documentation to include migration requirements for PostgreSQL and clarified the steps to take if enrollment fails due to an outdated schema. This ensures users are better informed about necessary actions during deployment.

docs/firewall.md

@@ -23,6 +23,8 @@
 
 Публичные URL (без API-ключа, вне `WEBUI_IP_WHITELIST` Traefik): `GET /v1/firewall/install.sh`, `GET /v1/firewall/sync-script`, `POST /v1/firewall/enroll`. Всегда **HTTPS**.
 
+Требуется миграция **`000027_firewall`** в PostgreSQL (применяется при старте API с актуальным бинарём). Если enroll отвечает `503` / `database schema outdated` — перезапустите `evobgp-api` / `evobgp-all` после деплоя новой версии.
+
 ```bash
 curl -fsSL https://<api>/v1/firewall/install.sh | \
   EVOBGP_CP_URL=https://<api> \

internal/firewallscripts/install.sh

@@ -38,10 +38,18 @@ CP_URL="${EVOBGP_CP_URL%/}"
 ENROLL_BODY=$(printf '{"name":"%s","hostname":"%s","client_token":"%s","client_version":"install.sh/1"}' \
   "$EVOBGP_CLIENT_NAME" "$HOSTNAME" "$CLIENT_TOKEN")
 
-RESP=$(curl -fsS -X POST "${CP_URL}/v1/firewall/enroll" \
+ENROLL_TMP=$(mktemp)
+trap 'rm -f "$ENROLL_TMP"' EXIT
+ENROLL_CODE=$(curl -sS -o "$ENROLL_TMP" -w "%{http_code}" -X POST "${CP_URL}/v1/firewall/enroll" \
   -H "Content-Type: application/json" \
   -H "X-EvoBGP-Seed: ${EVOBGP_SEED}" \
   -d "$ENROLL_BODY")
+if [[ "$ENROLL_CODE" != "201" ]]; then
+  echo "evobgp-firewall enroll failed: HTTP ${ENROLL_CODE} from ${CP_URL}/v1/firewall/enroll" >&2
+  cat "$ENROLL_TMP" >&2
+  exit 1
+fi
+RESP=$(cat "$ENROLL_TMP")
 
 CLIENT_ID=""
 if command -v jq >/dev/null 2>&1; then

internal/httpapi/routes_crud.go

@@ -16,6 +16,8 @@ import (
 	"evobgp/internal/pipeline"
 	"evobgp/internal/runtimelogs"
 	"evobgp/internal/store"
+
+	"github.com/jackc/pgx/v5/pgconn"
 )
 
 func (s *Server) registerCRUDRoutes(m *http.ServeMux) {
@@ -188,9 +190,29 @@ func writeStoreErr(w http.ResponseWriter, err error) {
 		writeProblem(w, http.StatusUnprocessableEntity, "Unprocessable Entity", invalidInputDetail)
 		return
 	}
+	if writePostgresStoreErr(w, err) {
+		return
+	}
 	writeInternalError(w, "store", err)
 }
 
+func writePostgresStoreErr(w http.ResponseWriter, err error) bool {
+	var pgErr *pgconn.PgError
+	if !errors.As(err, &pgErr) {
+		return false
+	}
+	switch pgErr.Code {
+	case "42P01":
+		writeProblem(w, http.StatusServiceUnavailable, "Service Unavailable",
+			"database schema outdated; restart API after deploy or apply migration 000027_firewall")
+		return true
+	case "23505":
+		writeProblem(w, http.StatusConflict, "Conflict", "resource already exists")
+		return true
+	}
+	return false
+}
+
 func (s *Server) handleListCDNSources(w http.ResponseWriter, r *http.Request) {
 	a, ok := authFromContext(r.Context())
 	if !ok || !s.requireAtLeast(w, a, "viewer") {

internal/httpapi/routes_firewall.go

@@ -123,7 +123,7 @@ func (s *Server) handleFirewallEnrollPublic(w http.ResponseWriter, r *http.Reque
 			writeProblem(w, http.StatusConflict, "Conflict", "client token already enrolled")
 			return
 		}
-		writeInternalError(w, "internal", err)
+		writeStoreErr(w, err)
 		return
 	}
 	writeJSON(w, http.StatusCreated, map[string]any{

scripts/firewall/install.sh

@@ -38,10 +38,18 @@ CP_URL="${EVOBGP_CP_URL%/}"
 ENROLL_BODY=$(printf '{"name":"%s","hostname":"%s","client_token":"%s","client_version":"install.sh/1"}' \
   "$EVOBGP_CLIENT_NAME" "$HOSTNAME" "$CLIENT_TOKEN")
 
-RESP=$(curl -fsS -X POST "${CP_URL}/v1/firewall/enroll" \
+ENROLL_TMP=$(mktemp)
+trap 'rm -f "$ENROLL_TMP"' EXIT
+ENROLL_CODE=$(curl -sS -o "$ENROLL_TMP" -w "%{http_code}" -X POST "${CP_URL}/v1/firewall/enroll" \
   -H "Content-Type: application/json" \
   -H "X-EvoBGP-Seed: ${EVOBGP_SEED}" \
   -d "$ENROLL_BODY")
+if [[ "$ENROLL_CODE" != "201" ]]; then
+  echo "evobgp-firewall enroll failed: HTTP ${ENROLL_CODE} from ${CP_URL}/v1/firewall/enroll" >&2
+  cat "$ENROLL_TMP" >&2
+  exit 1
+fi
+RESP=$(cat "$ENROLL_TMP")
 
 CLIENT_ID=""
 if command -v jq >/dev/null 2>&1; then