feat(deploy): harden restricted-network agent installs

server/internal/backup/file_runner.go

@@ -84,7 +84,7 @@ func (r *FileRunner) Run(_ context.Context, task TaskSpec, writer LogWriter) (*R
 
 		walkErr := filepath.Walk(sourcePath, func(currentPath string, currentInfo os.FileInfo, walkErr error) error {
 			if walkErr != nil {
-				writer.WriteLine(fmt.Sprintf("⚠ 无法访问 %s: %v", currentPath, walkErr))
+				writer.WriteLine(fmt.Sprintf("[WARN] 无法访问 %s: %v", currentPath, walkErr))
 				return nil
 			}
 			relPath, err := filepath.Rel(baseParent, currentPath)
@@ -115,7 +115,7 @@ func (r *FileRunner) Run(_ context.Context, task TaskSpec, writer LogWriter) (*R
 
 			if currentInfo.IsDir() {
 				dirCount++
-				writer.WriteLine(fmt.Sprintf("📁 进入目录 %s", archiveName))
+				writer.WriteLine(fmt.Sprintf("[DIR] 进入目录 %s", archiveName))
 			}
 
 			header, err := tar.FileInfoHeader(currentInfo, "")

server/internal/http/install_flow_test.go

@@ -115,7 +115,7 @@ func setupInstallFlowRouterWithExternalURL(t *testing.T, externalURL string) (ht
 	return router, setupResp.Data.Token
 }
 
-func TestInstallTokenUsesConfiguredExternalURL(t *testing.T) {
+func TestInstallTokenUsesAgentSpecificURLAndConnectionSettings(t *testing.T) {
 	const externalURL = "https://public.example.com/base"
 	router, jwt := setupInstallFlowRouterWithExternalURL(t, externalURL)
 
@@ -141,11 +141,14 @@ func TestInstallTokenUsesConfiguredExternalURL(t *testing.T) {
 	}
 
 	genBody, _ := json.Marshal(map[string]any{
-		"mode":         "systemd",
-		"arch":         "auto",
-		"agentVersion": "v1.7.0",
-		"downloadSrc":  "github",
-		"ttlSeconds":   900,
+		"mode":           "systemd",
+		"arch":           "auto",
+		"agentVersion":   "v1.7.0",
+		"downloadSrc":    "github",
+		"ttlSeconds":     900,
+		"agentMasterUrl": "http://127.0.0.1:18340",
+		"proxyUrl":       "socks5h://127.0.0.1:1080",
+		"caCertFile":     "/etc/pki/internal-ca.pem",
 	})
 	genReq := httptest.NewRequest(http.MethodPost,
 		"/api/nodes/"+formatUint(batchResp.Data[0].ID)+"/install-tokens", bytes.NewBuffer(genBody))
@@ -156,6 +159,9 @@ func TestInstallTokenUsesConfiguredExternalURL(t *testing.T) {
 	if genRec.Code != 200 {
 		t.Fatalf("install-tokens failed: %d %s", genRec.Code, genRec.Body.String())
 	}
+	if genRec.Header().Get("Cache-Control") != "no-store" {
+		t.Fatalf("install-token response must not be cached: %#v", genRec.Header())
+	}
 	var genResp struct {
 		Data struct {
 			InstallToken string `json:"installToken"`
@@ -167,18 +173,21 @@ func TestInstallTokenUsesConfiguredExternalURL(t *testing.T) {
 	if err := json.Unmarshal(genRec.Body.Bytes(), &genResp); err != nil {
 		t.Fatalf("unmarshal gen: %v", err)
 	}
-	if genResp.Data.URL != externalURL+"/api/install/"+genResp.Data.InstallToken {
-		t.Fatalf("url should use external URL, got %q", genResp.Data.URL)
+	if genResp.Data.URL != "http://127.0.0.1:18340/api/install/"+genResp.Data.InstallToken {
+		t.Fatalf("url should use Agent-specific URL, got %q", genResp.Data.URL)
 	}
-	if genResp.Data.FallbackURL != externalURL+"/install/"+genResp.Data.InstallToken {
-		t.Fatalf("fallbackUrl should use external URL, got %q", genResp.Data.FallbackURL)
+	if genResp.Data.FallbackURL != "http://127.0.0.1:18340/install/"+genResp.Data.InstallToken {
+		t.Fatalf("fallbackUrl should use Agent-specific URL, got %q", genResp.Data.FallbackURL)
 	}
 	decodedScript, err := base64.StdEncoding.DecodeString(genResp.Data.ScriptBase64)
 	if err != nil {
 		t.Fatalf("scriptBase64 should be valid base64: %v", err)
 	}
-	if !strings.Contains(string(decodedScript), `MASTER_URL="`+externalURL+`"`) {
-		t.Fatalf("script should use external MASTER_URL:\n%s", string(decodedScript))
+	if !strings.Contains(string(decodedScript), `MASTER_URL="http://127.0.0.1:18340"`) {
+		t.Fatalf("script should use the Agent-specific Master URL:\n%s", string(decodedScript))
+	}
+	if !strings.Contains(string(decodedScript), `PROXY_URL="socks5h://127.0.0.1:1080"`) || !strings.Contains(string(decodedScript), `CA_CERT_FILE="/etc/pki/internal-ca.pem"`) {
+		t.Fatalf("script should include restricted-network settings:\n%s", string(decodedScript))
 	}
 }
 
@@ -258,8 +267,9 @@ func TestOneClickInstallFlow(t *testing.T) {
 	if scriptRec.Code != 200 {
 		t.Fatalf("script fetch failed: %d %s", scriptRec.Code, scriptRec.Body.String())
 	}
-	if !strings.Contains(scriptRec.Body.String(), "systemctl enable --now backupx-agent") {
-		t.Fatalf("script missing systemctl enable:\n%s", scriptRec.Body.String())
+	if !strings.Contains(scriptRec.Body.String(), "systemctl enable backupx-agent") ||
+		!strings.Contains(scriptRec.Body.String(), "systemctl restart backupx-agent") {
+		t.Fatalf("script missing systemctl enable/restart:\n%s", scriptRec.Body.String())
 	}
 	// Issue #46 防嗅探 headers：text/plain + nosniff + no-store + Content-Disposition
 	if ct := scriptRec.Header().Get("Content-Type"); !strings.HasPrefix(ct, "text/plain") {
@@ -354,7 +364,8 @@ func TestInstallScriptAliasUnderAPI(t *testing.T) {
 	if aliasRec.Code != 200 {
 		t.Fatalf("/api/install alias failed: %d %s", aliasRec.Code, aliasRec.Body.String())
 	}
-	if !strings.Contains(aliasRec.Body.String(), "systemctl enable --now backupx-agent") {
+	if !strings.Contains(aliasRec.Body.String(), "systemctl enable backupx-agent") ||
+		!strings.Contains(aliasRec.Body.String(), "systemctl restart backupx-agent") {
 		t.Errorf("alias should return rendered script, got:\n%s", aliasRec.Body.String())
 	}
 	if ct := aliasRec.Header().Get("Content-Type"); !strings.HasPrefix(ct, "text/plain") {
@@ -557,6 +568,9 @@ func TestInstallFlowComposeSuccessConsumesToken(t *testing.T) {
 	if !strings.Contains(composeRec.Body.String(), "BACKUPX_AGENT_TOKEN") {
 		t.Fatalf("compose missing token env:\n%s", composeRec.Body.String())
 	}
+	if composeRec.Header().Get("Cache-Control") != "no-store" || composeRec.Header().Get("X-Content-Type-Options") != "nosniff" {
+		t.Fatalf("compose response missing secret-safe headers: %#v", composeRec.Header())
+	}
 
 	scriptReq := httptest.NewRequest(http.MethodGet, "/api/install/"+genResp.Data.InstallToken, nil)
 	scriptRec := httptest.NewRecorder()

server/internal/http/install_handler.go

@@ -104,16 +104,22 @@ func (h *InstallHandler) Compose(c *gin.Context) {
 	}
 	h.recordConsumeAudit(c, consumed, "compose")
 	yaml, err := installscript.RenderComposeYaml(installscript.Context{
-		MasterURL:    resolveMasterURL(c, h.externalURL),
+		MasterURL:    installMasterURL(resolveMasterURL(c, h.externalURL), consumed.Record),
 		AgentToken:   consumed.Node.Token,
 		AgentVersion: consumed.Record.AgentVer,
 		Mode:         model.InstallModeDocker,
+		Arch:         consumed.Record.Arch,
 		NodeID:       consumed.Node.ID,
+		ProxyURL:     consumed.Record.ProxyURL,
+		CACertFile:   consumed.Record.CACertFile,
 	})
 	if err != nil {
 		c.String(stdhttp.StatusInternalServerError, "render error\n")
 		return
 	}
+	c.Header("X-Content-Type-Options", "nosniff")
+	c.Header("Cache-Control", "no-store")
+	c.Header("Content-Disposition", `attachment; filename="backupx-agent-compose.yml"`)
 	c.Data(stdhttp.StatusOK, "text/yaml; charset=utf-8", []byte(yaml))
 }
 
@@ -134,7 +140,7 @@ func (h *InstallHandler) recordConsumeAudit(c *gin.Context, consumed *service.Co
 
 func renderInstallScript(masterURL string, node *model.Node, record *model.AgentInstallToken) (string, error) {
 	return installscript.RenderScript(installscript.Context{
-		MasterURL:     masterURL,
+		MasterURL:     installMasterURL(masterURL, record),
 		AgentToken:    node.Token,
 		AgentVersion:  record.AgentVer,
 		Mode:          record.Mode,
@@ -142,9 +148,18 @@ func renderInstallScript(masterURL string, node *model.Node, record *model.Agent
 		DownloadBase:  installscript.DownloadBaseFor(record.DownloadSrc),
 		InstallPrefix: "/opt/backupx-agent",
 		NodeID:        node.ID,
+		ProxyURL:      record.ProxyURL,
+		CACertFile:    record.CACertFile,
 	})
 }
 
+func installMasterURL(fallback string, record *model.AgentInstallToken) string {
+	if record != nil && strings.TrimSpace(record.AgentMasterURL) != "" {
+		return strings.TrimRight(strings.TrimSpace(record.AgentMasterURL), "/")
+	}
+	return fallback
+}
+
 // resolveMasterURL 按优先级推导 Master URL：外部配置 > X-Forwarded-* > Request.Host。
 // 此为包级 helper，供 install_handler 和 node_handler 共用。
 func resolveMasterURL(c *gin.Context, externalURL string) string {

server/internal/http/node_handler.go

@@ -204,6 +204,7 @@ func (h *NodeHandler) RotateToken(c *gin.Context) {
 	recordAudit(c, h.auditService, "node", "rotate_token", "node",
 		fmt.Sprintf("%d", id), "",
 		fmt.Sprintf("轮换节点 Token (ID: %d)", id))
+	c.Header("Cache-Control", "no-store")
 	response.Success(c, gin.H{"newToken": tok})
 }
 
@@ -220,11 +221,14 @@ func (h *NodeHandler) CreateInstallToken(c *gin.Context) {
 		return
 	}
 	var input struct {
-		Mode         string `json:"mode"`
-		Arch         string `json:"arch"`
-		AgentVersion string `json:"agentVersion"`
-		DownloadSrc  string `json:"downloadSrc"`
-		TTLSeconds   int    `json:"ttlSeconds"`
+		Mode           string `json:"mode"`
+		Arch           string `json:"arch"`
+		AgentVersion   string `json:"agentVersion"`
+		DownloadSrc    string `json:"downloadSrc"`
+		TTLSeconds     int    `json:"ttlSeconds"`
+		AgentMasterURL string `json:"agentMasterUrl"`
+		ProxyURL       string `json:"proxyUrl"`
+		CACertFile     string `json:"caCertFile"`
 	}
 	if err := c.ShouldBindJSON(&input); err != nil {
 		c.JSON(stdhttp.StatusBadRequest, gin.H{"code": "INVALID_INPUT", "message": err.Error()})
@@ -246,13 +250,16 @@ func (h *NodeHandler) CreateInstallToken(c *gin.Context) {
 
 	out, err := h.installTokenSvc.CreateCommand(c.Request.Context(), service.InstallCommandInput{
 		InstallTokenInput: service.InstallTokenInput{
-			NodeID:       uint(id),
-			Mode:         input.Mode,
-			Arch:         input.Arch,
-			AgentVersion: input.AgentVersion,
-			DownloadSrc:  input.DownloadSrc,
-			TTLSeconds:   input.TTLSeconds,
-			CreatedByID:  h.resolveCurrentUserID(c),
+			NodeID:         uint(id),
+			Mode:           input.Mode,
+			Arch:           input.Arch,
+			AgentVersion:   input.AgentVersion,
+			DownloadSrc:    input.DownloadSrc,
+			TTLSeconds:     input.TTLSeconds,
+			CreatedByID:    h.resolveCurrentUserID(c),
+			AgentMasterURL: input.AgentMasterURL,
+			ProxyURL:       input.ProxyURL,
+			CACertFile:     input.CACertFile,
 		},
 		MasterURL: resolveMasterURL(c, h.externalURL),
 	})
@@ -278,6 +285,7 @@ func (h *NodeHandler) CreateInstallToken(c *gin.Context) {
 		"composeUrl":         out.ComposeURL,
 		"fallbackComposeUrl": out.FallbackComposeURL,
 	}
+	c.Header("Cache-Control", "no-store")
 	response.Success(c, body)
 }
 
@@ -292,18 +300,24 @@ func (h *NodeHandler) PreviewScript(c *gin.Context) {
 		return
 	}
 	src := c.DefaultQuery("downloadSrc", "github")
+	agentMasterURL := c.Query("agentMasterUrl")
+	if agentMasterURL == "" {
+		agentMasterURL = resolveMasterURL(c, h.externalURL)
+	}
 	ctx := installscript.Context{
-		MasterURL:     resolveMasterURL(c, h.externalURL),
+		MasterURL:     agentMasterURL,
 		AgentToken:    "<AGENT_TOKEN>",
 		AgentVersion:  ver,
 		Mode:          mode,
 		Arch:          arch,
 		DownloadBase:  installscript.DownloadBaseFor(src),
 		InstallPrefix: "/opt/backupx-agent",
+		ProxyURL:      c.Query("proxyUrl"),
+		CACertFile:    c.Query("caCertFile"),
 	}
 	script, err := installscript.RenderScript(ctx)
 	if err != nil {
-		response.Error(c, err)
+		response.Error(c, apperror.BadRequest("INSTALL_TOKEN_INVALID", "Agent 连接配置无效", err))
 		return
 	}
 	c.Data(stdhttp.StatusOK, "text/x-shellscript; charset=utf-8", []byte(script))

server/internal/installscript/issue46_test.go

@@ -44,7 +44,7 @@ func TestRenderScriptUsesRootForBareMetalBackups(t *testing.T) {
 	}
 	for _, want := range []string{
 		"/var/lib/backupx-agent/tmp",
-		"install -d -m 0700 /var/lib/backupx-agent /var/lib/backupx-agent/tmp",
+		"install -d -m 0700 \"$CONFIG_DIR\" /var/lib/backupx-agent /var/lib/backupx-agent/tmp",
 	} {
 		if !strings.Contains(got, want) {
 			t.Errorf("script missing %q:\n%s", want, got)

server/internal/installscript/renderer.go

@@ -8,6 +8,7 @@ import (
 	_ "embed"
 	"fmt"
 	"net/url"
+	"path"
 	"strings"
 	"text/template"
 
@@ -30,6 +31,8 @@ type Context struct {
 	DownloadBase  string
 	InstallPrefix string
 	NodeID        uint
+	ProxyURL      string
+	CACertFile    string
 }
 
 // DownloadBaseFor 将下载源枚举转换为具体 URL 前缀。
@@ -84,6 +87,12 @@ func RenderComposeYaml(ctx Context) (string, error) {
 // 这些字段被直接写入 shell 双引号字符串和 YAML 双引号值；不做校验会带来
 // 注入风险（如 MasterURL 含 `"\nCOMMAND:` 可逃逸 YAML 结构）。
 func validateContext(ctx Context) error {
+	if ctx.Mode != model.InstallModeSystemd && ctx.Mode != model.InstallModeDocker && ctx.Mode != model.InstallModeForeground {
+		return fmt.Errorf("unsupported install mode %q", ctx.Mode)
+	}
+	if ctx.Arch != model.InstallArchAmd64 && ctx.Arch != model.InstallArchArm64 && ctx.Arch != model.InstallArchAuto {
+		return fmt.Errorf("unsupported install architecture %q", ctx.Arch)
+	}
 	if err := validateMasterURL(ctx.MasterURL); err != nil {
 		return err
 	}
@@ -93,6 +102,42 @@ func validateContext(ctx Context) error {
 	if err := validateAgentVersion(ctx.AgentVersion); err != nil {
 		return err
 	}
+	if err := validateProxyURL(ctx.ProxyURL); err != nil {
+		return err
+	}
+	if err := validateCACertFile(ctx.CACertFile); err != nil {
+		return err
+	}
+	if !path.IsAbs(ctx.InstallPrefix) || path.Clean(ctx.InstallPrefix) != ctx.InstallPrefix {
+		return fmt.Errorf("install prefix must be a clean absolute path without shell metacharacters")
+	}
+	for _, c := range ctx.InstallPrefix {
+		switch {
+		case c >= '0' && c <= '9':
+		case c >= 'a' && c <= 'z':
+		case c >= 'A' && c <= 'Z':
+		case c == '/' || c == '.' || c == '_' || c == '-' || c == '+':
+		default:
+			return fmt.Errorf("install prefix contains illegal character %q", c)
+		}
+	}
+	if err := validateDownloadBase(ctx.DownloadBase); err != nil {
+		return err
+	}
+	return nil
+}
+
+func validateDownloadBase(raw string) error {
+	if strings.ContainsAny(raw, " \t\r\n\"'`$\\") {
+		return fmt.Errorf("download base contains illegal characters")
+	}
+	u, err := url.Parse(raw)
+	if err != nil || (u.Scheme != "http" && u.Scheme != "https") || u.Host == "" {
+		return fmt.Errorf("download base must be an absolute http(s) URL")
+	}
+	if u.User != nil || u.RawQuery != "" || u.Fragment != "" {
+		return fmt.Errorf("download base must not contain credentials, query or fragment")
+	}
 	return nil
 }
 
@@ -114,6 +159,43 @@ func validateMasterURL(raw string) error {
 	if u.Host == "" {
 		return fmt.Errorf("master URL missing host")
 	}
+	if u.User != nil || u.RawQuery != "" || u.Fragment != "" {
+		return fmt.Errorf("master URL must not contain credentials, query or fragment")
+	}
+	return nil
+}
+
+func validateProxyURL(raw string) error {
+	raw = strings.TrimSpace(raw)
+	if raw == "" {
+		return nil
+	}
+	if strings.ContainsAny(raw, " \t\r\n\"'`$\\") {
+		return fmt.Errorf("proxy URL contains illegal characters")
+	}
+	u, err := url.Parse(raw)
+	if err != nil || u.Host == "" {
+		return fmt.Errorf("invalid proxy URL")
+	}
+	switch u.Scheme {
+	case "http", "https", "socks5", "socks5h":
+	default:
+		return fmt.Errorf("proxy URL scheme must be http, https, socks5 or socks5h")
+	}
+	if u.User != nil || u.RawQuery != "" || u.Fragment != "" || (u.Path != "" && u.Path != "/") {
+		return fmt.Errorf("proxy URL must not contain credentials, path, query or fragment")
+	}
+	return nil
+}
+
+func validateCACertFile(file string) error {
+	file = strings.TrimSpace(file)
+	if file == "" {
+		return nil
+	}
+	if !path.IsAbs(file) || path.Clean(file) != file || strings.ContainsAny(file, " \t\r\n\"'`$\\") {
+		return fmt.Errorf("CA certificate path must be a clean absolute path without shell metacharacters")
+	}
 	return nil
 }
 
@@ -160,6 +242,9 @@ func validateAgentVersion(v string) error {
 }
 
 func withDefaults(ctx Context) Context {
+	if ctx.Arch == "" {
+		ctx.Arch = model.InstallArchAuto
+	}
 	if ctx.InstallPrefix == "" {
 		ctx.InstallPrefix = "/opt/backupx-agent"
 	}

server/internal/installscript/renderer_test.go

@@ -2,11 +2,13 @@ package installscript
 
 import (
 	"os"
+	"os/exec"
 	"path/filepath"
 	"strings"
 	"testing"
 
 	"backupx/server/internal/model"
+	"gopkg.in/yaml.v3"
 )
 
 // 使用合法 hex token（32 字节 = 64 字符）以通过 validateAgentToken 校验
@@ -27,11 +29,13 @@ func TestRenderScriptSystemd(t *testing.T) {
 		t.Fatalf("render err: %v", err)
 	}
 	mustContain := []string{
-		"BACKUPX_AGENT_MASTER=${MASTER_URL}",
-		`Environment="BACKUPX_AGENT_TOKEN=${AGENT_TOKEN}"`,
+		`master: "${MASTER_URL}"`,
+		`tokenFile: "${TOKEN_FILE}"`,
+		`ExecStart=${INSTALL_PREFIX}/backupx agent --config ${CONFIG_FILE}`,
 		"/var/lib/backupx-agent/tmp",
 		"systemctl daemon-reload",
-		"systemctl enable --now backupx-agent",
+		"systemctl enable backupx-agent",
+		"systemctl restart backupx-agent",
 		"systemctl status backupx-agent",
 		"X-Agent-Token: ${AGENT_TOKEN}",
 		"MASTER_URL=\"https://master.example.com\"",
@@ -48,6 +52,29 @@ func TestRenderScriptSystemd(t *testing.T) {
 			t.Errorf("systemd script unexpectedly contains %q", s)
 		}
 	}
+	if strings.Contains(got, `Environment="BACKUPX_AGENT_TOKEN=`) {
+		t.Errorf("systemd unit must not expose the agent token in its environment:\n%s", got)
+	}
+}
+
+func TestRenderedInstallScriptSyntax(t *testing.T) {
+	sh, err := exec.LookPath("sh")
+	if err != nil {
+		t.Skip("POSIX sh is not available on this platform")
+	}
+	for _, mode := range []string{model.InstallModeSystemd, model.InstallModeDocker, model.InstallModeForeground} {
+		ctx := testCtx
+		ctx.Mode = mode
+		script, renderErr := RenderScript(ctx)
+		if renderErr != nil {
+			t.Fatal(renderErr)
+		}
+		cmd := exec.Command(sh, "-n")
+		cmd.Stdin = strings.NewReader(script)
+		if output, syntaxErr := cmd.CombinedOutput(); syntaxErr != nil {
+			t.Fatalf("%s installer syntax invalid: %v\n%s", mode, syntaxErr, output)
+		}
+	}
 }
 
 func TestRenderScriptForeground(t *testing.T) {
@@ -90,8 +117,11 @@ func TestRenderScriptDocker(t *testing.T) {
 	if !strings.Contains(got, `"awuqing/backupx:${AGENT_VERSION}" agent`) {
 		t.Errorf("docker script must start image in agent mode:\n%s", got)
 	}
-	if !strings.Contains(got, `-e "BACKUPX_AGENT_TEMP_DIR=/var/lib/backupx-agent/tmp"`) {
-		t.Errorf("docker script missing temp dir env:\n%s", got)
+	if !strings.Contains(got, `-v /etc/backupx-agent:/etc/backupx-agent:ro`) {
+		t.Errorf("docker script missing protected config mount:\n%s", got)
+	}
+	if !strings.Contains(got, `agent --config /etc/backupx-agent/config.yaml`) {
+		t.Errorf("docker script must load the protected config file:\n%s", got)
 	}
 	if !strings.Contains(got, `docker logs --tail=100 backupx-agent`) {
 		t.Errorf("docker script missing diagnostic log command:\n%s", got)
@@ -102,6 +132,9 @@ func TestRenderScriptDocker(t *testing.T) {
 	if strings.Contains(got, "systemctl daemon-reload") {
 		t.Errorf("docker script should not reference systemctl:\n%s", got)
 	}
+	if strings.Contains(got, `-e "BACKUPX_AGENT_TOKEN=`) {
+		t.Errorf("docker inspect must not expose the agent token:\n%s", got)
+	}
 }
 
 func TestDockerEntrypointForwardsAgentSubcommand(t *testing.T) {
@@ -111,12 +144,18 @@ func TestDockerEntrypointForwardsAgentSubcommand(t *testing.T) {
 		t.Fatalf("read docker entrypoint: %v", err)
 	}
 	script := string(got)
-	if !strings.Contains(script, `"${1:-}" = "agent"`) {
-		t.Fatalf("entrypoint must detect the agent subcommand before starting server:\n%s", script)
-	}
 	if !strings.Contains(script, `exec /app/bin/backupx "$@"`) {
 		t.Fatalf("entrypoint must exec backupx with forwarded args:\n%s", script)
 	}
+	if !strings.Contains(script, `exec su-exec backupx:backupx /app/bin/backupx "$@"`) {
+		t.Fatalf("master entrypoint must drop privileges after data migration:\n%s", script)
+	}
+	if !strings.Contains(script, `export HOME=/app`) {
+		t.Fatalf("master entrypoint must set the service user's home directory:\n%s", script)
+	}
+	if strings.Contains(script, "nginx") || strings.Contains(script, "wait -n") {
+		t.Fatalf("entrypoint should run a single foreground process:\n%s", script)
+	}
 }
 
 func TestRenderComposeYaml(t *testing.T) {
@@ -138,9 +177,40 @@ func TestRenderComposeYaml(t *testing.T) {
 	if !strings.Contains(got, `BACKUPX_AGENT_TEMP_DIR: "/var/lib/backupx-agent/tmp"`) {
 		t.Errorf("compose missing temp dir env:\n%s", got)
 	}
+	if !strings.Contains(got, `user: "0:0"`) || !strings.Contains(got, "no-new-privileges:true") {
+		t.Errorf("compose missing root execution declaration or security option:\n%s", got)
+	}
 	if !strings.Contains(got, "/var/lib/backupx-agent:/var/lib/backupx-agent") {
 		t.Errorf("compose missing agent data volume:\n%s", got)
 	}
+	var document map[string]any
+	if err := yaml.Unmarshal([]byte(got), &document); err != nil {
+		t.Fatalf("compose is not valid YAML: %v\n%s", err, got)
+	}
+}
+
+func TestRenderComposeYamlIncludesRestrictedNetworkSettings(t *testing.T) {
+	ctx := testCtx
+	ctx.Mode = model.InstallModeDocker
+	ctx.ProxyURL = "socks5h://127.0.0.1:1080"
+	ctx.CACertFile = "/etc/backupx-agent/ca.pem"
+	got, err := RenderComposeYaml(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{
+		`BACKUPX_AGENT_PROXY_URL: "socks5h://127.0.0.1:1080"`,
+		`BACKUPX_AGENT_CA_CERT_FILE: "/etc/backupx-agent/ca.pem"`,
+		`- /etc/backupx-agent/ca.pem:/etc/backupx-agent/ca.pem:ro`,
+	} {
+		if !strings.Contains(got, want) {
+			t.Errorf("compose missing %q:\n%s", want, got)
+		}
+	}
+	var document map[string]any
+	if err := yaml.Unmarshal([]byte(got), &document); err != nil {
+		t.Fatalf("compose is not valid YAML: %v\n%s", err, got)
+	}
 }
 
 func TestRenderScriptRejectsInjectedMasterURL(t *testing.T) {
@@ -159,6 +229,73 @@ func TestRenderScriptRejectsInjectedMasterURL(t *testing.T) {
 	}
 }
 
+func TestRenderScriptIncludesRestrictedNetworkSettings(t *testing.T) {
+	ctx := testCtx
+	ctx.MasterURL = "http://127.0.0.1:18340"
+	ctx.ProxyURL = "socks5h://127.0.0.1:1080"
+	ctx.CACertFile = "/etc/pki/internal-ca.pem"
+	got, err := RenderScript(ctx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{
+		`PROXY_URL="socks5h://127.0.0.1:1080"`,
+		`CA_CERT_FILE="/etc/pki/internal-ca.pem"`,
+		`proxyUrl: "${PROXY_URL}"`,
+		`caCertFile: "${CA_CERT_FILE}"`,
+		`curl -fsSL --retry 3 --retry-delay 2 --connect-timeout 15 --proxy "$PROXY_URL"`,
+	} {
+		if !strings.Contains(got, want) {
+			t.Errorf("restricted network script missing %q", want)
+		}
+	}
+}
+
+func TestRenderScriptRejectsUnsafeRestrictedNetworkSettings(t *testing.T) {
+	for _, mutate := range []func(*Context){
+		func(ctx *Context) { ctx.ProxyURL = "ftp://proxy.example.com" },
+		func(ctx *Context) { ctx.ProxyURL = "http://user:pass@proxy.example.com" },
+		func(ctx *Context) { ctx.ProxyURL = "http://proxy.example.com/connect" },
+		func(ctx *Context) { ctx.CACertFile = "relative-ca.pem" },
+	} {
+		ctx := testCtx
+		mutate(&ctx)
+		if _, err := RenderScript(ctx); err == nil {
+			t.Fatalf("expected restricted network settings to be rejected: %+v", ctx)
+		}
+	}
+}
+
+func TestRenderScriptRejectsUnsafeDeploymentSettings(t *testing.T) {
+	for _, mutate := range []func(*Context){
+		func(ctx *Context) { ctx.Mode = "unknown" },
+		func(ctx *Context) { ctx.Arch = "386" },
+		func(ctx *Context) { ctx.InstallPrefix = "/opt/backupx;touch/tmp/pwned" },
+		func(ctx *Context) { ctx.DownloadBase = "https://user:pass@example.com/releases" },
+	} {
+		ctx := testCtx
+		mutate(&ctx)
+		if _, err := RenderScript(ctx); err == nil {
+			t.Fatalf("expected unsafe deployment settings to be rejected: %+v", ctx)
+		}
+	}
+}
+
+func TestRenderScriptVerifiesReleaseChecksumWithoutEmoji(t *testing.T) {
+	got, err := RenderScript(testCtx)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{"sha256sum -c", `download_file "${URL}.sha256"`, "[OK] 节点已上线", "[WARN]"} {
+		if !strings.Contains(got, want) {
+			t.Errorf("script missing %q", want)
+		}
+	}
+	if strings.ContainsAny(got, "\u2713\u26a0") {
+		t.Fatal("installer output must not use emoji symbols")
+	}
+}
+
 func TestRenderComposeYamlRejectsInjectedMasterURL(t *testing.T) {
 	ctx := testCtx
 	ctx.Mode = model.InstallModeDocker

server/internal/installscript/templates/agent-compose.yml.tmpl

@@ -1,14 +1,22 @@
-# BackupX Agent docker-compose 片段
+# BackupX Agent Compose 片段
 # 生成于 {{.MasterURL}} · 节点 ID {{.NodeID}}
-version: "3.8"
+# 文件包含长期节点 Token，请保存为 0600 权限并在部署完成后限制访问。
 services:
   backupx-agent:
     image: awuqing/backupx:{{.AgentVersion}}
     command: ["agent"]
+    user: "0:0"
     restart: unless-stopped
+    security_opt:
+      - no-new-privileges:true
     environment:
       BACKUPX_AGENT_MASTER: "{{.MasterURL}}"
       BACKUPX_AGENT_TOKEN: "{{.AgentToken}}"
       BACKUPX_AGENT_TEMP_DIR: "/var/lib/backupx-agent/tmp"
-    volumes:
+{{if .ProxyURL}}      BACKUPX_AGENT_PROXY_URL: "{{.ProxyURL}}"
+{{end}}{{if .CACertFile}}      BACKUPX_AGENT_CA_CERT_FILE: "{{.CACertFile}}"
+{{end}}    volumes:
       - /var/lib/backupx-agent:/var/lib/backupx-agent
+{{if .CACertFile}}      - {{.CACertFile}}:{{.CACertFile}}:ro
+{{end}}      # 备份宿主机文件时，必须按需添加只读源目录挂载：
+      # - /srv/data:/srv/data:ro

server/internal/installscript/templates/agent-install.sh.tmpl

@@ -1,12 +1,11 @@
 #!/bin/sh
 # BackupX Agent 一键安装脚本（由 Master 动态渲染）
-# Magic: BACKUPX_AGENT_INSTALL_V1  —— 若 `head -3 脚本` 看不到此行，说明反向代理/CDN 改写了响应
+# Magic: BACKUPX_AGENT_INSTALL_V1 —— 若 `head -3 脚本` 看不到此行，说明反向代理或 CDN 改写了响应
 # 模式: {{.Mode}} | 架构: {{.Arch}} | 版本: {{.AgentVersion}}
 set -eu
+umask 077
 
-# 自举到 bash（文件执行模式下生效；管道模式 $0 不是文件，exec 会静默失败，继续用 sh）。
-# 动机：部分 Debian/Ubuntu 用户通过 `curl | sudo sh` 触发时，dash 对本脚本报语法错误；
-# 若目标机装有 bash，优先切换到 bash 获得更一致的行为。
+# 文件执行模式下优先使用 bash；管道模式继续使用 POSIX sh。
 if [ -z "${BASH_VERSION:-}" ] && command -v bash >/dev/null 2>&1 && [ -f "$0" ]; then
     exec bash "$0" "$@"
 fi
@@ -17,14 +16,56 @@ AGENT_VERSION="{{.AgentVersion}}"
 DOWNLOAD_BASE="{{.DownloadBase}}"
 INSTALL_PREFIX="{{.InstallPrefix}}"
 ARCH="{{.Arch}}"
+PROXY_URL="{{.ProxyURL}}"
+CA_CERT_FILE="{{.CACertFile}}"
+CONFIG_DIR="/etc/backupx-agent"
+CONFIG_FILE="${CONFIG_DIR}/config.yaml"
+TOKEN_FILE="${CONFIG_DIR}/agent.token"
+
+download_file() {
+    source_url="$1"
+    destination="$2"
+    if command -v curl >/dev/null 2>&1; then
+        if [ -n "$PROXY_URL" ]; then
+            curl -fsSL --retry 3 --retry-delay 2 --connect-timeout 15 --proxy "$PROXY_URL" "$source_url" -o "$destination"
+        else
+            curl -fsSL --retry 3 --retry-delay 2 --connect-timeout 15 "$source_url" -o "$destination"
+        fi
+    else
+        wget -q -T 30 -O "$destination" "$source_url"
+    fi
+}
+
+agent_is_online() {
+    if command -v curl >/dev/null 2>&1; then
+        if [ -n "$PROXY_URL" ] && [ -n "$CA_CERT_FILE" ]; then
+            response=$(curl -fsS --max-time 5 --proxy "$PROXY_URL" --cacert "$CA_CERT_FILE" -H "X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null) || return 1
+        elif [ -n "$PROXY_URL" ]; then
+            response=$(curl -fsS --max-time 5 --proxy "$PROXY_URL" -H "X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null) || return 1
+        elif [ -n "$CA_CERT_FILE" ]; then
+            response=$(curl -fsS --max-time 5 --cacert "$CA_CERT_FILE" -H "X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null) || return 1
+        else
+            response=$(curl -fsS --max-time 5 -H "X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null) || return 1
+        fi
+    else
+        response=$(wget -q -T 5 --max-redirect=0 -O - --header="X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null) || return 1
+    fi
+    printf '%s' "$response" | grep -q '"status":"online"'
+}
 
 # 1. 前置检查
 [ "$(id -u)" -eq 0 ] || { echo "请使用 root 或 sudo 执行" >&2; exit 1; }
-command -v curl >/dev/null || command -v wget >/dev/null \
+command -v curl >/dev/null 2>&1 || command -v wget >/dev/null 2>&1 \
     || { echo "需要 curl 或 wget" >&2; exit 1; }
-{{if eq .Mode "systemd"}}command -v systemctl >/dev/null || { echo "不支持非 systemd 系统" >&2; exit 1; }
-{{end}}{{if eq .Mode "docker"}}command -v docker >/dev/null || { echo "需要先安装 docker" >&2; exit 1; }
+command -v grep >/dev/null 2>&1 || { echo "需要 grep" >&2; exit 1; }
+if { [ -n "$PROXY_URL" ] || [ -n "$CA_CERT_FILE" ]; } && ! command -v curl >/dev/null 2>&1; then
+    echo "显式代理或自定义 CA 场景需要 curl" >&2
+    exit 1
+fi
+{{if eq .Mode "systemd"}}command -v systemctl >/dev/null 2>&1 || { echo "当前系统不支持 systemd" >&2; exit 1; }
+{{end}}{{if eq .Mode "docker"}}command -v docker >/dev/null 2>&1 || { echo "需要先安装 Docker" >&2; exit 1; }
 {{end}}
+
 # 2. 架构检测
 if [ "$ARCH" = "auto" ]; then
     case "$(uname -m)" in
@@ -34,24 +75,54 @@ if [ "$ARCH" = "auto" ]; then
     esac
 fi
 
+# 3. 安全写入 Agent 配置。systemd unit 与容器元数据中不保存节点 Token。
+install -d -m 0700 "$CONFIG_DIR" /var/lib/backupx-agent /var/lib/backupx-agent/tmp
+printf '%s\n' "$AGENT_TOKEN" > "$TOKEN_FILE"
+chmod 0600 "$TOKEN_FILE"
+if [ -n "$CA_CERT_FILE" ]; then
+    [ -r "$CA_CERT_FILE" ] || { echo "无法读取 CA 证书: $CA_CERT_FILE" >&2; exit 1; }
+    if [ "$CA_CERT_FILE" != "$CONFIG_DIR/ca.pem" ]; then
+        install -m 0644 "$CA_CERT_FILE" "$CONFIG_DIR/ca.pem"
+    fi
+    CA_CERT_FILE="$CONFIG_DIR/ca.pem"
+fi
+cat > "$CONFIG_FILE" <<CONFIG
+master: "${MASTER_URL}"
+tokenFile: "${TOKEN_FILE}"
+heartbeatInterval: "15s"
+pollInterval: "5s"
+tempDir: "/var/lib/backupx-agent/tmp"
+proxyUrl: "${PROXY_URL}"
+caCertFile: "${CA_CERT_FILE}"
+CONFIG
+chmod 0600 "$CONFIG_FILE"
+
 {{if ne .Mode "docker"}}
-# 3. 下载二进制（systemd / foreground 模式）
+# 4. 下载并安装二进制（systemd / foreground 模式）
 ARCHIVE="backupx-${AGENT_VERSION}-linux-${ARCH}.tar.gz"
 URL="${DOWNLOAD_BASE}/${AGENT_VERSION}/${ARCHIVE}"
-TMPDIR="$(mktemp -d)"; trap 'rm -rf "$TMPDIR"' EXIT
+TMPDIR="$(mktemp -d)"
+trap 'rm -rf "$TMPDIR"' EXIT HUP INT TERM
 echo "[1/4] 下载 ${URL}"
-if command -v curl >/dev/null; then
-    curl -fsSL "$URL" -o "$TMPDIR/pkg.tar.gz"
+download_file "$URL" "$TMPDIR/$ARCHIVE"
+if download_file "${URL}.sha256" "$TMPDIR/$ARCHIVE.sha256" 2>/dev/null; then
+    if command -v sha256sum >/dev/null 2>&1; then
+        (cd "$TMPDIR" && sha256sum -c "$ARCHIVE.sha256")
+    elif command -v shasum >/dev/null 2>&1; then
+        (cd "$TMPDIR" && shasum -a 256 -c "$ARCHIVE.sha256")
+    else
+        echo "已下载校验文件，但系统缺少 sha256sum 或 shasum，拒绝未校验安装" >&2
+        exit 1
+    fi
 else
-    wget -qO "$TMPDIR/pkg.tar.gz" "$URL"
+    echo "[WARN] 当前版本未提供 SHA-256 校验文件，继续兼容安装" >&2
 fi
-tar xzf "$TMPDIR/pkg.tar.gz" -C "$TMPDIR"
+tar xzf "$TMPDIR/$ARCHIVE" -C "$TMPDIR"
 
-# 4. 安装二进制 + 数据目录
 echo "[2/4] 安装到 ${INSTALL_PREFIX}"
 install -d -m 0755 "$INSTALL_PREFIX"
-install -d -m 0700 /var/lib/backupx-agent /var/lib/backupx-agent/tmp
-install -m 0755 "$TMPDIR/backupx-${AGENT_VERSION}-linux-${ARCH}/backupx" "$INSTALL_PREFIX/backupx"
+install -m 0755 "$TMPDIR/backupx-${AGENT_VERSION}-linux-${ARCH}/backupx" "$INSTALL_PREFIX/backupx.new"
+mv -f "$INSTALL_PREFIX/backupx.new" "$INSTALL_PREFIX/backupx"
 {{end}}
 
 {{if eq .Mode "systemd"}}
@@ -62,69 +133,78 @@ cat > /etc/systemd/system/backupx-agent.service <<UNIT
 Description=BackupX Agent
 After=network-online.target
 Wants=network-online.target
+StartLimitIntervalSec=300
+StartLimitBurst=10
 
 [Service]
 Type=simple
-Environment="BACKUPX_AGENT_MASTER=${MASTER_URL}"
-Environment="BACKUPX_AGENT_TOKEN=${AGENT_TOKEN}"
-ExecStart=${INSTALL_PREFIX}/backupx agent --temp-dir /var/lib/backupx-agent/tmp
+ExecStart=${INSTALL_PREFIX}/backupx agent --config ${CONFIG_FILE}
 Restart=on-failure
 RestartSec=10s
-# Agent 需以 root 运行以读取任意源数据；与单机服务端保持一致的资源/句柄上限。
+TimeoutStopSec=30s
+UMask=0077
+# Agent 以 root 运行，以便读取备份源及执行恢复；节点 Token 仅保存在 0600 文件中。
 LimitNOFILE=65535
 
 [Install]
 WantedBy=multi-user.target
 UNIT
+chmod 0644 /etc/systemd/system/backupx-agent.service
 systemctl daemon-reload
-systemctl enable --now backupx-agent
+if ! systemctl enable backupx-agent || ! systemctl restart backupx-agent; then
+    echo "BackupX Agent 服务启动失败" >&2
+    systemctl status backupx-agent --no-pager >&2 || true
+    journalctl -u backupx-agent -n 100 --no-pager >&2 || true
+    exit 1
+fi
 
 # 6. 等待上线
 echo "[4/4] 等待节点上线"
-for i in $(seq 1 15); do
+i=0
+while [ "$i" -lt 15 ]; do
     sleep 2
-    if curl -fsSL -H "X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null \
-        | grep -q '"status":"online"'; then
-        echo "✓ 节点已上线"
+    if agent_is_online; then
+        echo "[OK] 节点已上线"
         exit 0
     fi
+    i=$((i + 1))
 done
-echo "⚠ 30s 内未收到上线心跳，请检查防火墙或 journalctl -u backupx-agent"
-echo "提示：systemd 服务名是 backupx-agent，可执行 systemctl status backupx-agent 查看状态。"
+echo "[WARN] 30 秒内未收到上线心跳，请检查网络、代理或 SSH 隧道" >&2
+echo "排查命令: systemctl status backupx-agent" >&2
+echo "排查命令: journalctl -u backupx-agent -n 100 --no-pager" >&2
 exit 2
 {{end}}
 
 {{if eq .Mode "foreground"}}
 # 5. 前台运行
-echo "[3/3] 前台启动 agent（Ctrl+C 退出）"
-export BACKUPX_AGENT_MASTER="${MASTER_URL}"
-export BACKUPX_AGENT_TOKEN="${AGENT_TOKEN}"
-exec "${INSTALL_PREFIX}/backupx" agent --temp-dir /var/lib/backupx-agent/tmp
+echo "[3/3] 前台启动 Agent（Ctrl+C 退出）"
+exec "${INSTALL_PREFIX}/backupx" agent --config "$CONFIG_FILE"
 {{end}}
 
 {{if eq .Mode "docker"}}
-# Docker 模式：直接用镜像启动容器
+# Docker 模式：配置文件只读挂载，避免 Token 出现在 docker inspect 环境变量中。
 echo "[1/2] 拉取镜像 awuqing/backupx:${AGENT_VERSION}"
 docker pull "awuqing/backupx:${AGENT_VERSION}"
 echo "[2/2] 启动容器 backupx-agent"
 docker rm -f backupx-agent >/dev/null 2>&1 || true
-docker run -d --name backupx-agent --restart=unless-stopped \
-    -e "BACKUPX_AGENT_MASTER=${MASTER_URL}" \
-    -e "BACKUPX_AGENT_TOKEN=${AGENT_TOKEN}" \
-    -e "BACKUPX_AGENT_TEMP_DIR=/var/lib/backupx-agent/tmp" \
+docker run -d --name backupx-agent --restart=unless-stopped --user 0:0 \
+    --security-opt no-new-privileges:true \
+    -v /etc/backupx-agent:/etc/backupx-agent:ro \
     -v /var/lib/backupx-agent:/var/lib/backupx-agent \
-    "awuqing/backupx:${AGENT_VERSION}" agent
-echo "✓ 容器已启动，等待节点上线"
-for i in $(seq 1 15); do
+    "awuqing/backupx:${AGENT_VERSION}" agent --config /etc/backupx-agent/config.yaml
+echo "提示: Docker Agent 只能访问显式挂载的目录；备份宿主机路径前请按文档添加只读 -v 挂载。"
+echo "容器已启动，等待节点上线"
+i=0
+while [ "$i" -lt 15 ]; do
     sleep 2
-    if curl -fsSL -H "X-Agent-Token: ${AGENT_TOKEN}" "${MASTER_URL}/api/v1/agent/self" 2>/dev/null \
-        | grep -q '"status":"online"'; then
-        echo "✓ 节点已上线"
+    if agent_is_online; then
+        echo "[OK] 节点已上线"
         exit 0
     fi
+    i=$((i + 1))
 done
-echo "⚠ 30s 内未收到上线心跳，请检查容器状态、网络与 Master URL。"
-echo "排查命令：docker ps -a --filter name=backupx-agent"
-echo "排查命令：docker logs --tail=100 backupx-agent"
+echo "[WARN] 30 秒内未收到上线心跳，请检查容器、代理、隧道与 Master 地址" >&2
+echo "排查命令: docker ps -a --filter name=backupx-agent" >&2
+echo "排查命令: docker logs --tail=100 backupx-agent" >&2
 exit 2
 {{end}}

server/internal/model/agent_install_token.go

@@ -6,17 +6,21 @@ import "time"
 //
 // 生命周期：创建 → 消费（ConsumedAt 非空即作废）→ 超过 ExpiresAt 后被 GC 硬删除。
 type AgentInstallToken struct {
-	ID          uint       `gorm:"primaryKey" json:"id"`
-	Token       string     `gorm:"size:64;uniqueIndex;not null" json:"token"`
-	NodeID      uint       `gorm:"not null;index" json:"nodeId"`
-	Mode        string     `gorm:"size:16;not null" json:"mode"`        // systemd|docker|foreground
-	Arch        string     `gorm:"size:16;not null" json:"arch"`        // amd64|arm64|auto
-	AgentVer    string     `gorm:"size:32;not null" json:"agentVersion"`
-	DownloadSrc string     `gorm:"size:16;not null;default:'github'" json:"downloadSrc"`
-	ExpiresAt   time.Time  `gorm:"not null;index" json:"expiresAt"`
-	ConsumedAt  *time.Time `json:"consumedAt,omitempty"`
-	CreatedByID uint       `gorm:"not null" json:"createdById"`
-	CreatedAt   time.Time  `json:"createdAt"`
+	ID          uint   `gorm:"primaryKey" json:"id"`
+	Token       string `gorm:"size:64;uniqueIndex;not null" json:"token"`
+	NodeID      uint   `gorm:"not null;index" json:"nodeId"`
+	Mode        string `gorm:"size:16;not null" json:"mode"` // systemd|docker|foreground
+	Arch        string `gorm:"size:16;not null" json:"arch"` // amd64|arm64|auto
+	AgentVer    string `gorm:"size:32;not null" json:"agentVersion"`
+	DownloadSrc string `gorm:"size:16;not null;default:'github'" json:"downloadSrc"`
+	// AgentMasterURL 可覆盖公开安装地址，支持代理或 SSH 隧道后的节点专用入口。
+	AgentMasterURL string     `gorm:"size:2048" json:"agentMasterUrl,omitempty"`
+	ProxyURL       string     `gorm:"size:2048" json:"proxyUrl,omitempty"`
+	CACertFile     string     `gorm:"size:512" json:"caCertFile,omitempty"`
+	ExpiresAt      time.Time  `gorm:"not null;index" json:"expiresAt"`
+	ConsumedAt     *time.Time `json:"consumedAt,omitempty"`
+	CreatedByID    uint       `gorm:"not null" json:"createdById"`
+	CreatedAt      time.Time  `json:"createdAt"`
 }
 
 func (AgentInstallToken) TableName() string { return "agent_install_tokens" }

server/internal/repository/agent_install_token_repository_test.go

@@ -20,6 +20,11 @@ func openTestInstallTokenDB(t *testing.T) *gorm.DB {
 	if err != nil {
 		t.Fatalf("open: %v", err)
 	}
+	sqlDB, err := db.DB()
+	if err != nil {
+		t.Fatalf("get sql database: %v", err)
+	}
+	t.Cleanup(func() { _ = sqlDB.Close() })
 	if err := db.AutoMigrate(&model.AgentInstallToken{}); err != nil {
 		t.Fatalf("migrate: %v", err)
 	}

server/internal/service/install_token_service.go

@@ -6,6 +6,7 @@ import (
 	"encoding/base64"
 	"encoding/hex"
 	"fmt"
+	"net/url"
 	"strings"
 	"time"
 
@@ -27,13 +28,16 @@ func NewInstallTokenService(repo repository.AgentInstallTokenRepository, nodeRep
 
 // InstallTokenInput 生成一次性安装令牌的输入。
 type InstallTokenInput struct {
-	NodeID       uint
-	Mode         string
-	Arch         string
-	AgentVersion string
-	DownloadSrc  string
-	TTLSeconds   int
-	CreatedByID  uint
+	NodeID         uint
+	Mode           string
+	Arch           string
+	AgentVersion   string
+	DownloadSrc    string
+	TTLSeconds     int
+	CreatedByID    uint
+	AgentMasterURL string
+	ProxyURL       string
+	CACertFile     string
 }
 
 // InstallTokenOutput 生成结果。
@@ -112,14 +116,17 @@ func (s *InstallTokenService) Create(ctx context.Context, in InstallTokenInput)
 	}
 	expiresAt := time.Now().UTC().Add(time.Duration(in.TTLSeconds) * time.Second)
 	record := &model.AgentInstallToken{
-		Token:       token,
-		NodeID:      in.NodeID,
-		Mode:        in.Mode,
-		Arch:        in.Arch,
-		AgentVer:    in.AgentVersion,
-		DownloadSrc: in.DownloadSrc,
-		ExpiresAt:   expiresAt,
-		CreatedByID: in.CreatedByID,
+		Token:          token,
+		NodeID:         in.NodeID,
+		Mode:           in.Mode,
+		Arch:           in.Arch,
+		AgentVer:       in.AgentVersion,
+		DownloadSrc:    in.DownloadSrc,
+		AgentMasterURL: strings.TrimRight(strings.TrimSpace(in.AgentMasterURL), "/"),
+		ProxyURL:       strings.TrimSpace(in.ProxyURL),
+		CACertFile:     strings.TrimSpace(in.CACertFile),
+		ExpiresAt:      expiresAt,
+		CreatedByID:    in.CreatedByID,
 	}
 	if err := s.repo.Create(ctx, record); err != nil {
 		return nil, err
@@ -130,9 +137,15 @@ func (s *InstallTokenService) Create(ctx context.Context, in InstallTokenInput)
 // CreateCommand 创建 install token，并返回 UI 展示安装命令所需的 URL 与嵌入式脚本。
 func (s *InstallTokenService) CreateCommand(ctx context.Context, in InstallCommandInput) (*InstallCommandOutput, error) {
 	masterURL := strings.TrimRight(strings.TrimSpace(in.MasterURL), "/")
-	if masterURL == "" {
-		return nil, apperror.BadRequest("INSTALL_TOKEN_INVALID", "masterURL 必填", nil)
+	deliveryURL, parseErr := url.Parse(masterURL)
+	if masterURL == "" || parseErr != nil || (deliveryURL.Scheme != "http" && deliveryURL.Scheme != "https") || deliveryURL.Host == "" || deliveryURL.User != nil || deliveryURL.RawQuery != "" || deliveryURL.Fragment != "" || strings.ContainsAny(masterURL, " \t\r\n\"'`$\\") {
+		return nil, apperror.BadRequest("INSTALL_TOKEN_INVALID", "masterURL 必须是安全的完整 HTTP(S) 地址", parseErr)
 	}
+	agentMasterURL := strings.TrimRight(strings.TrimSpace(in.AgentMasterURL), "/")
+	if agentMasterURL == "" {
+		agentMasterURL = masterURL
+	}
+	in.AgentMasterURL = agentMasterURL
 	if err := s.validate(in.InstallTokenInput); err != nil {
 		return nil, err
 	}
@@ -144,12 +157,15 @@ func (s *InstallTokenService) CreateCommand(ctx context.Context, in InstallComma
 		return nil, apperror.New(404, "NODE_NOT_FOUND", "节点不存在", nil)
 	}
 	if _, err := renderInstallCommandScript(masterURL, node, &model.AgentInstallToken{
-		Mode:        in.Mode,
-		Arch:        in.Arch,
-		AgentVer:    in.AgentVersion,
-		DownloadSrc: in.DownloadSrc,
+		Mode:           in.Mode,
+		Arch:           in.Arch,
+		AgentVer:       in.AgentVersion,
+		DownloadSrc:    in.DownloadSrc,
+		AgentMasterURL: in.AgentMasterURL,
+		ProxyURL:       in.ProxyURL,
+		CACertFile:     in.CACertFile,
 	}); err != nil {
-		return nil, err
+		return nil, apperror.BadRequest("INSTALL_TOKEN_INVALID", "Agent 连接配置无效", err)
 	}
 	out, err := s.Create(ctx, in.InstallTokenInput)
 	if err != nil {
@@ -164,20 +180,24 @@ func (s *InstallTokenService) CreateCommand(ctx context.Context, in InstallComma
 		ExpiresAt:    out.ExpiresAt,
 		Node:         out.Node,
 		Record:       out.Record,
-		URL:          masterURL + "/api/install/" + out.Token,
-		FallbackURL:  masterURL + "/install/" + out.Token,
+		URL:          agentMasterURL + "/api/install/" + out.Token,
+		FallbackURL:  agentMasterURL + "/install/" + out.Token,
 		ScriptBase64: base64.StdEncoding.EncodeToString([]byte(script)),
 	}
 	if out.Record.Mode == model.InstallModeDocker {
-		result.ComposeURL = masterURL + "/api/install/" + out.Token + "/compose.yml"
-		result.FallbackComposeURL = masterURL + "/install/" + out.Token + "/compose.yml"
+		result.ComposeURL = agentMasterURL + "/api/install/" + out.Token + "/compose.yml"
+		result.FallbackComposeURL = agentMasterURL + "/install/" + out.Token + "/compose.yml"
 	}
 	return result, nil
 }
 
 func renderInstallCommandScript(masterURL string, node *model.Node, record *model.AgentInstallToken) (string, error) {
+	agentMasterURL := strings.TrimRight(strings.TrimSpace(record.AgentMasterURL), "/")
+	if agentMasterURL == "" {
+		agentMasterURL = masterURL
+	}
 	return installscript.RenderScript(installscript.Context{
-		MasterURL:     masterURL,
+		MasterURL:     agentMasterURL,
 		AgentToken:    node.Token,
 		AgentVersion:  record.AgentVer,
 		Mode:          record.Mode,
@@ -185,6 +205,8 @@ func renderInstallCommandScript(masterURL string, node *model.Node, record *mode
 		DownloadBase:  installscript.DownloadBaseFor(record.DownloadSrc),
 		InstallPrefix: "/opt/backupx-agent",
 		NodeID:        node.ID,
+		ProxyURL:      record.ProxyURL,
+		CACertFile:    record.CACertFile,
 	})
 }
 
@@ -259,6 +281,9 @@ func (s *InstallTokenService) validate(in InstallTokenInput) error {
 		return apperror.BadRequest("INSTALL_TOKEN_INVALID",
 			fmt.Sprintf("ttlSeconds 需在 %d-%d", InstallTokenMinTTL, InstallTokenMaxTTL), nil)
 	}
+	if len(in.AgentMasterURL) > 2048 || len(in.ProxyURL) > 2048 || len(in.CACertFile) > 512 {
+		return apperror.BadRequest("INSTALL_TOKEN_INVALID", "连接配置过长", nil)
+	}
 	return nil
 }
 

server/internal/service/install_token_service_test.go

@@ -2,7 +2,9 @@ package service
 
 import (
 	"context"
+	"encoding/base64"
 	"path/filepath"
+	"strings"
 	"testing"
 	"time"
 
@@ -177,13 +179,16 @@ func TestInstallTokenServiceCreateCommandBuildsURLsAndScript(t *testing.T) {
 
 	out, err := svc.CreateCommand(context.Background(), InstallCommandInput{
 		InstallTokenInput: InstallTokenInput{
-			NodeID:       node.ID,
-			Mode:         model.InstallModeDocker,
-			Arch:         model.InstallArchAuto,
-			AgentVersion: "v1.7.0",
-			DownloadSrc:  model.InstallSourceGitHub,
-			TTLSeconds:   900,
-			CreatedByID:  1,
+			NodeID:         node.ID,
+			Mode:           model.InstallModeDocker,
+			Arch:           model.InstallArchAuto,
+			AgentVersion:   "v1.7.0",
+			DownloadSrc:    model.InstallSourceGitHub,
+			TTLSeconds:     900,
+			CreatedByID:    1,
+			AgentMasterURL: "http://127.0.0.1:18340",
+			ProxyURL:       "socks5h://127.0.0.1:1080",
+			CACertFile:     "/etc/pki/internal-ca.pem",
 		},
 		MasterURL: "https://public.example.com/base",
 	})
@@ -193,15 +198,66 @@ func TestInstallTokenServiceCreateCommandBuildsURLsAndScript(t *testing.T) {
 	if out.Token == "" || out.ScriptBase64 == "" {
 		t.Fatalf("missing token or script: %+v", out)
 	}
-	if out.URL != "https://public.example.com/base/api/install/"+out.Token {
+	if out.URL != "http://127.0.0.1:18340/api/install/"+out.Token {
 		t.Fatalf("bad url: %s", out.URL)
 	}
-	if out.FallbackURL != "https://public.example.com/base/install/"+out.Token {
+	if out.FallbackURL != "http://127.0.0.1:18340/install/"+out.Token {
 		t.Fatalf("bad fallback url: %s", out.FallbackURL)
 	}
-	if out.ComposeURL != "https://public.example.com/base/api/install/"+out.Token+"/compose.yml" {
+	if out.ComposeURL != "http://127.0.0.1:18340/api/install/"+out.Token+"/compose.yml" {
 		t.Fatalf("bad compose url: %s", out.ComposeURL)
 	}
+	script, err := base64.StdEncoding.DecodeString(out.ScriptBase64)
+	if err != nil {
+		t.Fatal(err)
+	}
+	for _, want := range []string{
+		`MASTER_URL="http://127.0.0.1:18340"`,
+		`PROXY_URL="socks5h://127.0.0.1:1080"`,
+		`CA_CERT_FILE="/etc/pki/internal-ca.pem"`,
+	} {
+		if !strings.Contains(string(script), want) {
+			t.Fatalf("script missing %q", want)
+		}
+	}
+}
+
+func TestInstallTokenServiceRejectsUnsafeConnectionBeforeCreate(t *testing.T) {
+	db := openInstallTokenTestDB(t)
+	nodeRepo := repository.NewNodeRepository(db)
+	node := &model.Node{Name: "restricted", Token: "deadbeefcafebabe0123456789abcdef0123456789abcdef0123456789abcdef"}
+	if err := nodeRepo.Create(context.Background(), node); err != nil {
+		t.Fatal(err)
+	}
+	tokenRepo := repository.NewAgentInstallTokenRepository(db)
+	svc := NewInstallTokenService(tokenRepo, nodeRepo)
+	_, err := svc.CreateCommand(context.Background(), InstallCommandInput{
+		InstallTokenInput: InstallTokenInput{
+			NodeID: node.ID, Mode: model.InstallModeSystemd, Arch: model.InstallArchAuto,
+			AgentVersion: "v2.4.0", DownloadSrc: model.InstallSourceGitHub, TTLSeconds: 900,
+			ProxyURL: "http://user:pass@proxy.example.com",
+		},
+		MasterURL: "https://public.example.com",
+	})
+	if err == nil {
+		t.Fatal("expected proxy credentials to be rejected")
+	}
+	count, countErr := tokenRepo.CountCreatedSince(context.Background(), node.ID, time.Now().UTC().Add(-time.Hour))
+	if countErr != nil || count != 0 {
+		t.Fatalf("invalid connection created token records: count=%d err=%v", count, countErr)
+	}
+
+	_, err = svc.CreateCommand(context.Background(), InstallCommandInput{
+		InstallTokenInput: InstallTokenInput{
+			NodeID: node.ID, Mode: model.InstallModeSystemd, Arch: model.InstallArchAuto,
+			AgentVersion: "v2.4.0", DownloadSrc: model.InstallSourceGitHub, TTLSeconds: 900,
+			AgentMasterURL: "https://master.internal",
+		},
+		MasterURL: "http://public.example.com/$unsafe",
+	})
+	if err == nil {
+		t.Fatal("expected unsafe public delivery URL to be rejected")
+	}
 }
 
 func TestInstallTokenServiceRateLimit(t *testing.T) {