feat: 新增「部署客户端」日志采集器模块

三种采集器（host-promtail / k8s-daemonset / k8s-fluentbit-sidecar），每种关联已部署 Loki：
- host-promtail：SSH 安装 Promtail（复用 deployBinary）
- k8s-daemonset：helm 安装 Promtail DaemonSet（复用 deployHelm）
- k8s-fluentbit-sidecar：kubectl patch 注入 Fluent Bit sidecar

含 Collector 数据模型、三个部署器、配置模板、CRUD API、前端页面。
附带 UI 优化：ErrorBoundary、部署卡片浏览器访问按钮、菜单名称调整。

Co-Authored-By: Claude <noreply@anthropic.com>

backend/services/collector.go

@@ -0,0 +1,268 @@
+package services
+
+import (
+	"context"
+	"fmt"
+	"time"
+
+	"lokideploy/models"
+	"lokideploy/utils"
+)
+
+type CollectorService struct{}
+
+func NewCollectorService() *CollectorService {
+	return &CollectorService{}
+}
+
+type CreateCollectorRequest struct {
+	Name             string
+	Type             string
+	LokiDeploymentID uint
+	HostID           *uint
+	ClusterID        *uint
+	TargetDeployment string
+	Namespace        string
+	LogPath          string
+	Labels           string
+}
+
+// fillAssociations 填充关联的 Loki / Host / Cluster（用于配置生成与展示）
+func (s *CollectorService) fillAssociations(c *models.Collector) {
+	db := models.GetDB()
+	db.RLock()
+	defer db.RUnlock()
+	for i := range db.Deployments {
+		if db.Deployments[i].ID == c.LokiDeploymentID {
+			d := db.Deployments[i]
+			c.LokiDeployment = &d
+			break
+		}
+	}
+	if c.HostID != nil {
+		for i := range db.Hosts {
+			if db.Hosts[i].ID == *c.HostID {
+				h := db.Hosts[i]
+				c.Host = &h
+				break
+			}
+		}
+	}
+	if c.ClusterID != nil {
+		for i := range db.Clusters {
+			if db.Clusters[i].ID == *c.ClusterID {
+				cl := db.Clusters[i]
+				c.Cluster = &cl
+				break
+			}
+		}
+	}
+}
+
+// generateConfigSnapshot 按类型生成配置快照
+func (s *CollectorService) generateConfigSnapshot(c *models.Collector) string {
+	endpoint := ""
+	if c.LokiDeployment != nil {
+		endpoint = c.LokiDeployment.Endpoint
+	}
+	switch c.Type {
+	case "host-promtail":
+		return PromtailConfig(endpoint, c.LogPath)
+	case "k8s-daemonset":
+		return PromtailHelmValues(endpoint)
+	case "k8s-fluentbit-sidecar":
+		host, port := parseLokiURL(endpoint)
+		app := c.TargetDeployment
+		ns := c.Namespace
+		if ns == "" {
+			ns = "default"
+		}
+		return FluentbitConfig(host, port, c.LogPath, app, ns)
+	}
+	return ""
+}
+
+func (s *CollectorService) Create(req *CreateCollectorRequest) (*models.Collector, error) {
+	switch req.Type {
+	case "host-promtail", "k8s-daemonset", "k8s-fluentbit-sidecar":
+	default:
+		return nil, fmt.Errorf("不支持的采集器类型: %s", req.Type)
+	}
+	if req.LokiDeploymentID == 0 {
+		return nil, fmt.Errorf("请选择关联的 Loki 部署")
+	}
+	if req.Type == "host-promtail" && (req.HostID == nil || *req.HostID == 0) {
+		return nil, fmt.Errorf("主机采集器需要选择目标主机")
+	}
+	if (req.Type == "k8s-daemonset" || req.Type == "k8s-fluentbit-sidecar") && (req.ClusterID == nil || *req.ClusterID == 0) {
+		return nil, fmt.Errorf("K8s 采集器需要选择目标集群")
+	}
+	if req.Type == "k8s-fluentbit-sidecar" && req.TargetDeployment == "" {
+		return nil, fmt.Errorf("Sidecar 采集器需要填写目标 Deployment 名称")
+	}
+
+	refType := "cluster"
+	if req.Type == "host-promtail" {
+		refType = "host"
+	}
+
+	collector := models.Collector{
+		ID:               models.GetDB().NextID("collectors"),
+		Name:             req.Name,
+		Type:             req.Type,
+		LokiDeploymentID: req.LokiDeploymentID,
+		RefType:          refType,
+		HostID:           req.HostID,
+		ClusterID:        req.ClusterID,
+		TargetDeployment: req.TargetDeployment,
+		Namespace:        req.Namespace,
+		LogPath:          req.LogPath,
+		Labels:           req.Labels,
+		Status:           "pending",
+		CreatedAt:        time.Now(),
+		UpdatedAt:        time.Now(),
+	}
+
+	s.fillAssociations(&collector)
+	if collector.LokiDeployment == nil {
+		return nil, fmt.Errorf("关联的 Loki 部署不存在")
+	}
+	collector.Config = s.generateConfigSnapshot(&collector)
+
+	db := models.GetDB()
+	db.Lock()
+	db.Collectors = append(db.Collectors, collector)
+	db.Unlock()
+	go db.Save()
+
+	go s.Install(collector.ID)
+	return &collector, nil
+}
+
+func (s *CollectorService) Get(id uint) (*models.Collector, error) {
+	db := models.GetDB()
+	db.RLock()
+	var found *models.Collector
+	for i := range db.Collectors {
+		if db.Collectors[i].ID == id {
+			c := db.Collectors[i]
+			found = &c
+			break
+		}
+	}
+	db.RUnlock()
+	if found == nil {
+		return nil, utils.ErrNotFound
+	}
+	s.fillAssociations(found)
+	return found, nil
+}
+
+func (s *CollectorService) List(page, pageSize int) ([]models.Collector, int64, error) {
+	db := models.GetDB()
+	db.RLock()
+	total := int64(len(db.Collectors))
+	start := (page - 1) * pageSize
+	if start < 0 || start >= len(db.Collectors) {
+		db.RUnlock()
+		return []models.Collector{}, total, nil
+	}
+	end := start + pageSize
+	if end > len(db.Collectors) {
+		end = len(db.Collectors)
+	}
+	result := make([]models.Collector, end-start)
+	copy(result, db.Collectors[start:end])
+	db.RUnlock()
+	for i := range result {
+		s.fillAssociations(&result[i])
+	}
+	return result, total, nil
+}
+
+func (s *CollectorService) Update(id uint, updates map[string]interface{}) error {
+	db := models.GetDB()
+	db.Lock()
+	defer db.Unlock()
+	for i := range db.Collectors {
+		if db.Collectors[i].ID == id {
+			if v, ok := updates["name"].(string); ok && v != "" {
+				db.Collectors[i].Name = v
+			}
+			if v, ok := updates["status"].(string); ok && v != "" {
+				db.Collectors[i].Status = v
+			}
+			if v, ok := updates["statusMessage"].(string); ok {
+				db.Collectors[i].StatusMessage = v
+			}
+			if v, ok := updates["logPath"].(string); ok {
+				db.Collectors[i].LogPath = v
+			}
+			if v, ok := updates["labels"].(string); ok {
+				db.Collectors[i].Labels = v
+			}
+			db.Collectors[i].UpdatedAt = time.Now()
+			go db.Save()
+			return nil
+		}
+	}
+	return utils.ErrNotFound
+}
+
+func (s *CollectorService) Delete(id uint) error {
+	collector, err := s.Get(id)
+	if err != nil {
+		return utils.ErrNotFound
+	}
+	db := models.GetDB()
+	db.Lock()
+	for i, c := range db.Collectors {
+		if c.ID == id {
+			db.Collectors = append(db.Collectors[:i], db.Collectors[i+1:]...)
+			break
+		}
+	}
+	db.Unlock()
+	go db.Save()
+	// 异步卸载（用拷贝的 collector，避免删除后取不到）
+	go func() {
+		ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
+		defer cancel()
+		NewCollectorDeployer(collector, collector.LokiDeployment, nil).Uninstall(ctx)
+	}()
+	return nil
+}
+
+// Install 异步部署采集器
+func (s *CollectorService) Install(id uint) {
+	collector, err := s.Get(id)
+	if err != nil {
+		return
+	}
+	if collector.LokiDeployment == nil {
+		s.Update(id, map[string]interface{}{"status": "error", "statusMessage": "关联的 Loki 不存在"})
+		return
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 10*time.Minute)
+	defer cancel()
+	if err := NewCollectorDeployer(collector, collector.LokiDeployment, nil).Install(ctx); err != nil {
+		s.Update(id, map[string]interface{}{"status": "error", "statusMessage": err.Error()})
+		return
+	}
+	s.Update(id, map[string]interface{}{"status": "active", "statusMessage": "采集器已部署"})
+}
+
+// Uninstall 异步卸载采集器
+func (s *CollectorService) Uninstall(id uint) {
+	collector, err := s.Get(id)
+	if err != nil {
+		return
+	}
+	if collector.LokiDeployment == nil {
+		return
+	}
+	ctx, cancel := context.WithTimeout(context.Background(), 2*time.Minute)
+	defer cancel()
+	NewCollectorDeployer(collector, collector.LokiDeployment, nil).Uninstall(ctx)
+	s.Update(id, map[string]interface{}{"status": "pending", "statusMessage": "采集器已卸载"})
+}

backend/services/collector_deployer.go

@@ -0,0 +1,331 @@
+package services
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"lokideploy/models"
+)
+
+// CollectorDeployer 采集器部署器，按 type 分发到三种安装/卸载流程
+type CollectorDeployer struct {
+	collector *models.Collector
+	loki      *models.LokiDeployment
+	logFunc   func(level, message, detail string)
+}
+
+func NewCollectorDeployer(c *models.Collector, l *models.LokiDeployment, logFunc func(level, message, detail string)) *CollectorDeployer {
+	return &CollectorDeployer{collector: c, loki: l, logFunc: logFunc}
+}
+
+func (d *CollectorDeployer) log(level, message, detail string) {
+	if d.logFunc != nil {
+		d.logFunc(level, message, detail)
+	}
+}
+
+// kubeconfigEnv 构造 kubectl/helm 所需的 KUBECONFIG 环境变量，返回 cleanup 删除临时文件
+func kubeconfigEnv(cluster *models.Cluster) (env []string, cleanup func(), err error) {
+	kubeconfig, err := resolveKubeconfig(cluster)
+	if err != nil {
+		return nil, nil, err
+	}
+	kubeFile, err := os.CreateTemp("", "kube-*.yaml")
+	if err != nil {
+		return nil, nil, err
+	}
+	kubeFile.WriteString(kubeconfig)
+	kubeFile.Close()
+	env = append(os.Environ(), fmt.Sprintf("KUBECONFIG=%s", kubeFile.Name()))
+	cleanup = func() { os.Remove(kubeFile.Name()) }
+	return env, cleanup, nil
+}
+
+// Install 按采集器类型分发安装
+func (d *CollectorDeployer) Install(ctx context.Context) error {
+	endpoint := d.loki.Endpoint
+	if endpoint == "" {
+		return fmt.Errorf("关联的 Loki 尚未部署，缺少推送地址（endpoint），请先成功部署该 Loki")
+	}
+	d.log("info", fmt.Sprintf("开始部署采集器 %s（类型 %s）", d.collector.Name, d.collector.Type), "")
+
+	var err error
+	switch d.collector.Type {
+	case "host-promtail":
+		err = d.installHost(ctx, endpoint)
+	case "k8s-daemonset":
+		err = d.installDaemonset(ctx, endpoint)
+	case "k8s-fluentbit-sidecar":
+		err = d.installSidecar(ctx, endpoint)
+	default:
+		return fmt.Errorf("不支持的采集器类型: %s", d.collector.Type)
+	}
+	if err != nil {
+		d.log("error", fmt.Sprintf("采集器部署失败: %v", err), "")
+		return err
+	}
+	d.log("success", "采集器部署完成", "")
+	return nil
+}
+
+// Uninstall 按采集器类型分发卸载
+func (d *CollectorDeployer) Uninstall(ctx context.Context) error {
+	switch d.collector.Type {
+	case "host-promtail":
+		return d.uninstallHost(ctx)
+	case "k8s-daemonset":
+		return d.uninstallDaemonset(ctx)
+	case "k8s-fluentbit-sidecar":
+		return d.uninstallSidecar(ctx)
+	}
+	return nil
+}
+
+// ===== host-promtail：SSH 安装 Promtail 二进制 + systemd =====
+func (d *CollectorDeployer) installHost(ctx context.Context, endpoint string) error {
+	host := d.collector.Host
+	if host == nil {
+		return fmt.Errorf("主机采集器缺少目标主机")
+	}
+	password, err := DecryptCred(host.Password)
+	if err != nil {
+		return err
+	}
+	client, err := NewSSHClient(host.HostIP, host.Port, host.User, password)
+	if err != nil {
+		return err
+	}
+	defer client.Close()
+
+	// 架构
+	archOut, _, _ := client.Execute(ctx, "uname -m")
+	arch := strings.TrimSpace(archOut)
+	switch arch {
+	case "x86_64":
+		arch = "amd64"
+	case "aarch64", "arm64":
+		arch = "arm64"
+	default:
+		return fmt.Errorf("不支持的主机架构: %s", arch)
+	}
+
+	// 下载 Promtail
+	d.log("info", fmt.Sprintf("下载 Promtail（%s）", arch), "")
+	url := fmt.Sprintf("https://github.com/grafana/loki/releases/download/v3.0.0/promtail-linux-%s.zip", arch)
+	dl := fmt.Sprintf("mkdir -p /opt/promtail /etc/promtail && cd /tmp && curl -fsSL -o p.zip '%s' && unzip -o p.zip -d /opt/promtail/ && chmod +x /opt/promtail/promtail-linux-%s", url, arch)
+	if _, _, err := client.Execute(ctx, dl); err != nil {
+		return fmt.Errorf("下载 Promtail 失败: %v", err)
+	}
+	client.Execute(ctx, "ln -sf /opt/promtail/promtail-linux-* /usr/local/bin/promtail 2>/dev/null || true")
+
+	// 配置
+	logPath := d.collector.LogPath
+	if logPath == "" {
+		logPath = "/var/log/*.log"
+	}
+	conf := PromtailConfig(endpoint, logPath)
+	client.Execute(ctx, fmt.Sprintf("cat > /etc/promtail/promtail.yaml << 'EOF'\n%s\nEOF", conf))
+
+	// systemd 服务
+	service := `[Unit]
+Description=Promtail Log Collector
+After=network.target
+
+[Service]
+Type=simple
+ExecStart=/usr/local/bin/promtail -config.file=/etc/promtail/promtail.yaml
+Restart=always
+RestartSec=10
+
+[Install]
+WantedBy=multi-user.target
+`
+	client.Execute(ctx, fmt.Sprintf("cat > /etc/systemd/system/promtail.service << 'EOF'\n%s\nEOF", service))
+	if _, _, err := client.Execute(ctx, "systemctl daemon-reload && systemctl enable promtail && systemctl restart promtail"); err != nil {
+		return fmt.Errorf("启动 Promtail 失败: %v", err)
+	}
+	return nil
+}
+
+func (d *CollectorDeployer) uninstallHost(ctx context.Context) error {
+	host := d.collector.Host
+	if host == nil {
+		return nil
+	}
+	password, _ := DecryptCred(host.Password)
+	client, err := NewSSHClient(host.HostIP, host.Port, host.User, password)
+	if err != nil {
+		return err
+	}
+	defer client.Close()
+	client.Execute(ctx, "systemctl stop promtail 2>/dev/null || true; systemctl disable promtail 2>/dev/null || true; rm -f /etc/systemd/system/promtail.service /usr/local/bin/promtail; systemctl daemon-reload")
+	return nil
+}
+
+// ===== k8s-daemonset：helm 安装 Promtail DaemonSet =====
+func (d *CollectorDeployer) installDaemonset(ctx context.Context, endpoint string) error {
+	cluster := d.collector.Cluster
+	if cluster == nil {
+		return fmt.Errorf("DaemonSet 采集器缺少目标集群")
+	}
+	env, cleanup, err := kubeconfigEnv(cluster)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+
+	ns := d.collector.Namespace
+	if ns == "" {
+		ns = "logging"
+	}
+
+	values := PromtailHelmValues(endpoint)
+	valuesFile, err := os.CreateTemp("", "promtail-values-*.yaml")
+	if err != nil {
+		return err
+	}
+	defer os.Remove(valuesFile.Name())
+	valuesFile.WriteString(values)
+	valuesFile.Close()
+
+	d.log("info", fmt.Sprintf("helm install promtail（命名空间 %s）", ns), "")
+	// 先添加 grafana repo（幂等）
+	repo := exec.CommandContext(ctx, "helm", "repo", "add", "grafana", "https://grafana.github.io/helm-charts")
+	repo.Env = env
+	repo.CombinedOutput()
+	exec.CommandContext(ctx, "helm", "repo", "update").CombinedOutput()
+
+	cmd := exec.CommandContext(ctx, "helm", "upgrade", "--install", "promtail", "grafana/promtail",
+		"-f", valuesFile.Name(), "--namespace", ns, "--create-namespace", "--wait", "--timeout", "5m")
+	cmd.Env = env
+	out, err := cmd.CombinedOutput()
+	if err != nil {
+		return fmt.Errorf("helm 安装 Promtail 失败: %v\n%s", err, string(out))
+	}
+	return nil
+}
+
+func (d *CollectorDeployer) uninstallDaemonset(ctx context.Context) error {
+	cluster := d.collector.Cluster
+	if cluster == nil {
+		return nil
+	}
+	env, cleanup, err := kubeconfigEnv(cluster)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+	ns := d.collector.Namespace
+	if ns == "" {
+		ns = "logging"
+	}
+	cmd := exec.CommandContext(ctx, "helm", "uninstall", "promtail", "--namespace", ns)
+	cmd.Env = env
+	cmd.CombinedOutput()
+	return nil
+}
+
+// ===== k8s-fluentbit-sidecar：kubectl patch 注入 Fluent Bit sidecar =====
+func (d *CollectorDeployer) installSidecar(ctx context.Context, endpoint string) error {
+	cluster := d.collector.Cluster
+	if cluster == nil {
+		return fmt.Errorf("Sidecar 采集器缺少目标集群")
+	}
+	target := d.collector.TargetDeployment
+	if target == "" {
+		return fmt.Errorf("Sidecar 采集器缺少目标 Deployment")
+	}
+	env, cleanup, err := kubeconfigEnv(cluster)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+
+	ns := d.collector.Namespace
+	if ns == "" {
+		ns = "default"
+	}
+	logPath := d.collector.LogPath
+	if logPath == "" {
+		logPath = "/var/log/app/*.log"
+	}
+	app := target
+
+	// 1. 检查目标 deployment 是否存在
+	d.log("info", fmt.Sprintf("检查目标 Deployment %s/%s", ns, target), "")
+	check := exec.CommandContext(ctx, "kubectl", "get", "deployment", target, "-n", ns)
+	check.Env = env
+	if out, err := check.CombinedOutput(); err != nil {
+		return fmt.Errorf("目标 Deployment 不存在: %s/%s\n%s", ns, target, string(out))
+	}
+
+	// 2. 幂等检查：是否已有 fluent-bit 容器
+	getNames := exec.CommandContext(ctx, "kubectl", "get", "deployment", target, "-n", ns, "-o", "jsonpath={.spec.template.spec.containers[*].name}")
+	getNames.Env = env
+	namesOut, _ := getNames.CombinedOutput()
+	if strings.Contains(string(namesOut), "fluent-bit") {
+		d.log("warn", "目标 Deployment 已含 fluent-bit 容器，跳过注入", "")
+		return nil
+	}
+
+	// 3. 部署 ConfigMap
+	lokiHost, lokiPort := parseLokiURL(endpoint)
+	conf := FluentbitConfig(lokiHost, lokiPort, logPath, app, ns)
+	cm := FluentbitConfigMapYAML(conf, ns)
+	cmFile, _ := os.CreateTemp("", "fluent-bit-cm-*.yaml")
+	defer os.Remove(cmFile.Name())
+	cmFile.WriteString(cm)
+	cmFile.Close()
+	d.log("info", "部署 Fluent Bit ConfigMap", "")
+	applyCm := exec.CommandContext(ctx, "kubectl", "apply", "-f", cmFile.Name())
+	applyCm.Env = env
+	if out, err := applyCm.CombinedOutput(); err != nil {
+		return fmt.Errorf("ConfigMap 部署失败: %v\n%s", err, string(out))
+	}
+
+	// 4. patch 注入 sidecar
+	d.log("info", fmt.Sprintf("为 %s 注入 Fluent Bit Sidecar", target), "")
+	patchFile, _ := os.CreateTemp("", "sidecar-patch-*.yaml")
+	defer os.Remove(patchFile.Name())
+	patchFile.WriteString(SidecarPatchYAML)
+	patchFile.Close()
+	patch := exec.CommandContext(ctx, "kubectl", "patch", "deployment", target, "-n", ns, "--type=strategic", "--patch-file", patchFile.Name())
+	patch.Env = env
+	if out, err := patch.CombinedOutput(); err != nil {
+		return fmt.Errorf("Sidecar 注入失败: %v\n%s", err, string(out))
+	}
+
+	// 5. 等待 rollout
+	d.log("info", "等待 Pod 重建", "")
+	rollout := exec.CommandContext(ctx, "kubectl", "rollout", "status", "deployment/"+target, "-n", ns, "--timeout=5m")
+	rollout.Env = env
+	rollout.CombinedOutput()
+	return nil
+}
+
+func (d *CollectorDeployer) uninstallSidecar(ctx context.Context) error {
+	cluster := d.collector.Cluster
+	if cluster == nil || d.collector.TargetDeployment == "" {
+		return nil
+	}
+	env, cleanup, err := kubeconfigEnv(cluster)
+	if err != nil {
+		return err
+	}
+	defer cleanup()
+	ns := d.collector.Namespace
+	if ns == "" {
+		ns = "default"
+	}
+	patchFile, _ := os.CreateTemp("", "sidecar-rm-*.yaml")
+	defer os.Remove(patchFile.Name())
+	patchFile.WriteString(SidecarRemovePatchYAML)
+	patchFile.Close()
+	patch := exec.CommandContext(ctx, "kubectl", "patch", "deployment", d.collector.TargetDeployment, "-n", ns, "--type=strategic", "--patch-file", patchFile.Name())
+	patch.Env = env
+	patch.CombinedOutput()
+	return nil
+}

backend/services/collector_templates.go

@@ -0,0 +1,183 @@
+package services
+
+import (
+	"fmt"
+	"strings"
+)
+
+// PromtailConfig 主机 Promtail 配置（推送至 lokiEndpoint，采集 logPath）
+func PromtailConfig(lokiEndpoint, logPath string) string {
+	return fmt.Sprintf(`server:
+  http_listen_port: 9080
+  grpc_listen_port: 0
+  log_level: info
+
+positions:
+  filename: /tmp/positions.yaml
+
+clients:
+  - url: %s/loki/api/v1/push
+
+scrape_configs:
+  - job_name: app
+    static_configs:
+      - targets: [localhost]
+        labels:
+          job: app
+          host: ${HOSTNAME}
+          __path__: %s
+`, lokiEndpoint, logPath)
+}
+
+// PromtailHelmValues DaemonSet 模式 Promtail Helm values
+func PromtailHelmValues(lokiEndpoint string) string {
+	return fmt.Sprintf(`config:
+  clients:
+    - url: %s/loki/api/v1/push
+
+daemonset:
+  enabled: true
+
+serviceAccount:
+  create: true
+
+resources:
+  limits:
+    cpu: 200m
+    memory: 128Mi
+  requests:
+    cpu: 100m
+    memory: 64Mi
+
+extraVolumes:
+  - name: varlog
+    hostPath:
+      path: /var/log
+  - name: varlibdockercontainers
+    hostPath:
+      path: /var/lib/docker/containers
+
+extraVolumeMounts:
+  - name: varlog
+    mountPath: /var/log
+    readOnly: true
+  - name: varlibdockercontainers
+    mountPath: /var/lib/docker/containers
+    readOnly: true
+`, lokiEndpoint)
+}
+
+// FluentbitConfig Sidecar 模式 Fluent Bit 配置（采集 logPath，推送至 lokiHost:lokiPort）
+func FluentbitConfig(lokiHost, lokiPort, logPath, app, namespace string) string {
+	return fmt.Sprintf(`[SERVICE]
+    Flush          5
+    Log_Level      info
+    HTTP_Server    On
+    HTTP_Listen    0.0.0.0
+    HTTP_Port      2020
+
+[INPUT]
+    Name              tail
+    Path              %s
+    Tag               app.%s
+    Refresh_Interval  5
+    Mem_Buf_Limit     5MB
+    Skip_Long_Lines   On
+    Read_from_Head    True
+    DB                /tmp/flb.db
+
+[FILTER]
+    Name    modify
+    Match   app.*
+    Add     namespace %s
+    Add     app %s
+
+[OUTPUT]
+    Name                loki
+    Match               *
+    Host                %s
+    Port                %s
+    Labels              job=fluent-bit, app=%s, namespace=%s
+`, logPath, app, namespace, app, lokiHost, lokiPort, app, namespace)
+}
+
+// FluentbitConfigMapYAML 包装 fluent-bit.conf 为 ConfigMap YAML（部署到 namespace）
+func FluentbitConfigMapYAML(conf, namespace string) string {
+	return fmt.Sprintf(`apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: fluent-bit-config
+  namespace: %s
+data:
+  fluent-bit.conf: |
+%s
+`, namespace, indentBlock(conf, "    "))
+}
+
+// SidecarPatchYAML strategic merge patch：为 Deployment 注入 Fluent Bit sidecar 容器
+const SidecarPatchYAML = `spec:
+  template:
+    spec:
+      volumes:
+      - name: app-logs
+        emptyDir: {}
+      - name: fluent-bit-config
+        configMap:
+          name: fluent-bit-config
+      containers:
+      - name: fluent-bit
+        image: cr.fluentbit.io/fluent/fluent-bit:3.1.1
+        imagePullPolicy: IfNotPresent
+        volumeMounts:
+        - name: app-logs
+          mountPath: /var/log/app
+          readOnly: true
+        - name: fluent-bit-config
+          mountPath: /fluent-bit/etc/
+        resources:
+          limits:
+            cpu: 200m
+            memory: 256Mi
+          requests:
+            cpu: 100m
+            memory: 128Mi
+`
+
+// SidecarRemovePatchYAML strategic merge patch：从 Deployment 移除 Fluent Bit sidecar（卸载）
+const SidecarRemovePatchYAML = `spec:
+  template:
+    spec:
+      containers:
+      - name: fluent-bit
+        $patch: delete
+      volumes:
+      - name: app-logs
+        $patch: delete
+      - name: fluent-bit-config
+        $patch: delete
+`
+
+// indentBlock 给每行加前缀（ConfigMap 嵌入配置需缩进）
+func indentBlock(s, pad string) string {
+	lines := strings.Split(s, "\n")
+	for i, l := range lines {
+		if l != "" {
+			lines[i] = pad + l
+		}
+	}
+	return strings.Join(lines, "\n")
+}
+
+// parseLokiURL 从 http://host:port 提取 host 与 port（Fluent Bit OUTPUT 需要）
+func parseLokiURL(endpoint string) (host, port string) {
+	u := strings.TrimSpace(endpoint)
+	u = strings.TrimPrefix(u, "http://")
+	u = strings.TrimPrefix(u, "https://")
+	if i := strings.Index(u, "/"); i >= 0 {
+		u = u[:i]
+	}
+	if i := strings.LastIndex(u, ":"); i >= 0 {
+		return u[:i], u[i+1:]
+	}
+	return u, "3100"
+}