Shares of other services and RepoISO integration

- include SMB drop-ins from /etc/samba/smb.conf.d into the generated smb.conf
- keep smbd/nfs-server running while other services (/etc/exports.d, drop-ins) share,
  instead of disabling them when nasmon has no shares of its own
- list those shares read-only on /shares
- settings: RepoISO URL; poll its /api/integration/status, dashboard card, menu link,
  alerts for portal down, stale worker, failed jobs, unmounted publications

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

internal/alert/repoiso_test.go

@@ -0,0 +1,35 @@
+package alert
+
+import (
+	"testing"
+	"time"
+
+	"nasmon/internal/collect"
+)
+
+func TestRepoISORules(t *testing.T) {
+	base := Input{Now: time.Now()}
+	if ev := Evaluate(base); len(ev) != 0 {
+		t.Fatalf("integration off must not alert: %v", keys(ev))
+	}
+
+	in := base
+	in.RepoISO = &collect.RepoISO{URL: "http://127.0.0.1", Error: "connection refused"}
+	ev := Evaluate(in)
+	if !has(ev, "repoiso:api:down") || len(ev) != 1 || ev[0].Level != LevelCrit {
+		t.Fatalf("down: %v", keys(ev))
+	}
+
+	in.RepoISO = &collect.RepoISO{Reachable: true, WorkerAlive: false, JobsFailed24h: 2, PublicationsError: 1}
+	ev = Evaluate(in)
+	for _, k := range []string{"repoiso:worker:stale", "repoiso:jobs:failed", "repoiso:publications:error"} {
+		if !has(ev, k) {
+			t.Errorf("missing %s in %v", k, keys(ev))
+		}
+	}
+
+	in.RepoISO = &collect.RepoISO{Reachable: true, WorkerAlive: true}
+	if ev = Evaluate(in); len(ev) != 0 {
+		t.Fatalf("healthy RepoISO alerted: %v", keys(ev))
+	}
+}

internal/alert/rules.go

@@ -40,6 +40,8 @@ type Input struct {
 	HasCPU  bool
 	RootFS  collect.FSUsage
 	RootOK  bool
+	// RepoISO is the polled RepoISO health (nil when the integration is off).
+	RepoISO *collect.RepoISO
 	// Frozen lists key prefixes whose open alerts must be left untouched
 	// because no fresh data was available for them in this cycle.
 	Frozen []string
@@ -194,10 +196,36 @@ func Evaluate(in Input) []Event {
 		}
 	}
 
+	if r := in.RepoISO; r != nil {
+		switch {
+		case !r.Reachable:
+			add("repoiso:api:down", LevelCrit, "RepoISO is not responding",
+				fmt.Sprintf("%s/api/integration/status: %s. Check: systemctl status repoiso-api nginx", r.URL, r.Error))
+		case !r.WorkerAlive:
+			add("repoiso:worker:stale", LevelWarn, "RepoISO worker is not running",
+				fmt.Sprintf("Last worker heartbeat: %s. Downloads, mounts and Proxmox exports are not processed. Check: systemctl status repoiso-worker", orNever(r.WorkerHeartbeat)))
+		}
+		if r.Reachable && r.JobsFailed24h > 0 {
+			add("repoiso:jobs:failed", LevelWarn, fmt.Sprintf("RepoISO: %d failed job(s) in 24 h", r.JobsFailed24h),
+				"See the Jobs page of RepoISO for the errors.")
+		}
+		if r.Reachable && r.PublicationsError > 0 {
+			add("repoiso:publications:error", LevelWarn, fmt.Sprintf("RepoISO: %d publication(s) not mounted", r.PublicationsError),
+				"See the Publications page of RepoISO; remount or unpublish the image.")
+		}
+	}
+
 	sort.Slice(ev, func(i, j int) bool { return ev[i].Key < ev[j].Key })
 	return ev
 }
 
+func orNever(s string) string {
+	if s == "" {
+		return "never"
+	}
+	return s
+}
+
 func humanBytes(b uint64) string {
 	const unit = 1024
 	if b < unit {

internal/collect/repoiso.go

@@ -0,0 +1,54 @@
+package collect
+
+import (
+	"encoding/json"
+	"fmt"
+	"net/http"
+	"strings"
+	"time"
+)
+
+// RepoISO is the health summary of a RepoISO portal running on the same host
+// (GET <url>/api/integration/status). Reachable=false means the API did not answer.
+type RepoISO struct {
+	URL               string    `json:"url"`
+	Reachable         bool      `json:"reachable"`
+	Error             string    `json:"error,omitempty"`
+	CheckedAt         time.Time `json:"checked_at"`
+	Version           string    `json:"version"`
+	WorkerAlive       bool      `json:"worker_alive"`
+	WorkerHeartbeat   string    `json:"worker_heartbeat"`
+	Images            int       `json:"images"`
+	ImagesBytes       uint64    `json:"images_bytes"`
+	ImagesPending     int       `json:"images_pending"`
+	ImagesError       int       `json:"images_error"`
+	Publications      int       `json:"publications"`
+	PublicationsError int       `json:"publications_error"`
+	JobsActive        int       `json:"jobs_active"`
+	JobsFailed24h     int       `json:"jobs_failed_24h"`
+	Exports           int       `json:"exports"`
+}
+
+var repoisoClient = &http.Client{Timeout: 5 * time.Second}
+
+// FetchRepoISO queries the RepoISO status endpoint; errors are reported in the result.
+func FetchRepoISO(base string) RepoISO {
+	base = strings.TrimRight(base, "/")
+	r := RepoISO{URL: base, CheckedAt: time.Now()}
+	resp, err := repoisoClient.Get(base + "/api/integration/status")
+	if err != nil {
+		r.Error = err.Error()
+		return r
+	}
+	defer resp.Body.Close()
+	if resp.StatusCode != http.StatusOK {
+		r.Error = fmt.Sprintf("HTTP %d", resp.StatusCode)
+		return r
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&r); err != nil {
+		r.Error = "bad response: " + err.Error()
+		return r
+	}
+	r.URL, r.Reachable, r.Error = base, true, ""
+	return r
+}

internal/collect/repoiso_test.go

@@ -0,0 +1,29 @@
+package collect
+
+import (
+	"net/http"
+	"net/http/httptest"
+	"testing"
+)
+
+func TestFetchRepoISO(t *testing.T) {
+	srv := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		if r.URL.Path != "/api/integration/status" {
+			http.NotFound(w, r)
+			return
+		}
+		_, _ = w.Write([]byte(`{"version":"0.1.3","worker_alive":true,"images":5,"images_bytes":1024,"jobs_failed_24h":1}`))
+	}))
+	defer srv.Close()
+	r := FetchRepoISO(srv.URL + "/")
+	if !r.Reachable || r.Version != "0.1.3" || !r.WorkerAlive || r.Images != 5 || r.JobsFailed24h != 1 || r.URL != srv.URL {
+		t.Fatalf("unexpected %+v", r)
+	}
+	if r := FetchRepoISO(srv.URL + "/missing"); r.Reachable || r.Error != "HTTP 404" {
+		t.Fatalf("404 not reported: %+v", r)
+	}
+	srv.Close()
+	if r := FetchRepoISO(srv.URL); r.Reachable || r.Error == "" {
+		t.Fatalf("closed server reported reachable: %+v", r)
+	}
+}

internal/config/config.go

@@ -40,15 +40,23 @@ type SelfTests struct {
 	Hour      int  `json:"hour"` // local hour of day when tests may be started
 }
 
+// Integrations links nasmon with other services on the same host.
+type Integrations struct {
+	// RepoISOURL is the RepoISO portal base URL nasmon polls for health
+	// (e.g. http://127.0.0.1); empty disables the integration.
+	RepoISOURL string `json:"repoiso_url"`
+}
+
 type Settings struct {
-	SMTP             SMTP       `json:"smtp"`
-	AlertsEnabled    bool       `json:"alerts_enabled"`
-	NotifyResolved   bool       `json:"notify_resolved"`
-	RemindHours      int        `json:"remind_hours"`
-	SmartIntervalMin int        `json:"smart_interval_min"`
-	SmartSkipStandby bool       `json:"smart_skip_standby"`
-	Thresholds       Thresholds `json:"thresholds"`
-	SelfTests        SelfTests  `json:"self_tests"`
+	SMTP             SMTP         `json:"smtp"`
+	AlertsEnabled    bool         `json:"alerts_enabled"`
+	NotifyResolved   bool         `json:"notify_resolved"`
+	RemindHours      int          `json:"remind_hours"`
+	SmartIntervalMin int          `json:"smart_interval_min"`
+	SmartSkipStandby bool         `json:"smart_skip_standby"`
+	Thresholds       Thresholds   `json:"thresholds"`
+	SelfTests        SelfTests    `json:"self_tests"`
+	Integrations     Integrations `json:"integrations"`
 }
 
 func Defaults() Settings {
@@ -102,6 +110,11 @@ func (s *Settings) Validate() error {
 	if s.SelfTests.ShortDays < 0 || s.SelfTests.LongDays < 0 {
 		return errors.New("self-test periods must be >= 0")
 	}
+	u := strings.TrimRight(strings.TrimSpace(s.Integrations.RepoISOURL), "/")
+	if u != "" && !strings.HasPrefix(u, "http://") && !strings.HasPrefix(u, "https://") {
+		return errors.New("RepoISO URL must start with http:// or https://")
+	}
+	s.Integrations.RepoISOURL = u
 	return nil
 }
 

internal/sched/sched.go

@@ -54,6 +54,7 @@ type Status struct {
 	NextSmartCheck time.Time             `json:"next_smart_check"`
 	SmartRunning   bool                  `json:"smart_running"`
 	LastMailErr    string                `json:"last_mail_err,omitempty"`
+	RepoISO        *collect.RepoISO      `json:"repoiso,omitempty"`
 }
 
 type Scheduler struct {
@@ -243,6 +244,11 @@ func (s *Scheduler) collectStorage() {
 	root, _ := collect.ReadFS("/")
 	alerts, _ := s.st.ActiveAlerts()
 	services := collect.ReadShareServices()
+	var repoiso *collect.RepoISO
+	if url := s.cfg.Get().Integrations.RepoISOURL; url != "" {
+		r := collect.FetchRepoISO(url)
+		repoiso = &r
+	}
 
 	s.mu.Lock()
 	defer s.mu.Unlock()
@@ -264,6 +270,7 @@ func (s *Scheduler) collectStorage() {
 	s.status.RootFS = root
 	s.status.Alerts = alerts
 	s.status.Services = services
+	s.status.RepoISO = repoiso
 }
 
 // buildViews merges lsblk disks with cached SMART data; caller holds s.mu.
@@ -419,7 +426,8 @@ func (s *Scheduler) evaluate() {
 		Disks: nil, Pools: st.Pools, PoolsOK: st.PoolsErr == "",
 		CPUTemp: st.CPUTemp, HasCPU: st.HasCPUTemp,
 		RootFS: st.RootFS, RootOK: st.RootFS.Total > 0,
-		Prev: map[string]*collect.Smart{},
+		Prev:    map[string]*collect.Smart{},
+		RepoISO: st.RepoISO,
 	}
 	for _, v := range st.Disks {
 		in.Disks = append(in.Disks, v.Disk)

internal/shares/apply.go

@@ -29,12 +29,17 @@ type Manager struct {
 	UID, GID string
 	SMBConf  string
 	Exports  string
-	Timeout  time.Duration
+	// IncludeDir holds Samba drop-ins of other services, included into smb.conf;
+	// ExportsDir is scanned for other services' NFS exports (both: "" = none).
+	IncludeDir string
+	ExportsDir string
+	Timeout    time.Duration
 }
 
 func New(run hostrun.Runner) *Manager {
 	m := &Manager{Run: run, LookPath: exec.LookPath, UID: DefaultOwnerUID, GID: DefaultOwnerUID,
-		SMBConf: DefaultSMBConf, Exports: DefaultExports, Timeout: 90 * time.Second}
+		SMBConf: DefaultSMBConf, Exports: DefaultExports, IncludeDir: DefaultSMBIncludeDir,
+		ExportsDir: DefaultExportsDir, Timeout: 90 * time.Second}
 	m.Owner = m.UID
 	if u, err := user.LookupId(m.UID); err == nil {
 		m.Owner, m.GID = u.Username, u.Gid
@@ -74,14 +79,19 @@ func (m *Manager) Apply(c Config) error {
 func (m *Manager) applySMB(c Config) error {
 	ctx, cancel := m.ctx()
 	defer cancel()
-	if err := hostrun.WriteFile(ctx, m.Run, m.SMBConf, RenderSMB(c, m.Owner)); err != nil {
+	own := c
+	if !c.SMB.Enabled {
+		own.SMB.Shares = nil // other services may keep smbd running; don't serve disabled shares
+	}
+	external := countKind(m.External(), "smb")
+	if err := hostrun.WriteFile(ctx, m.Run, m.SMBConf, RenderSMB(own, m.Owner, IncludeFiles(m.IncludeDir)...)); err != nil {
 		return fmt.Errorf("write %s: %w", m.SMBConf, err)
 	}
 	if out, err := m.Run(ctx, "", "testparm", "-s", "--suppress-prompt", m.SMBConf); err != nil {
 		_ = hostrun.Restore(ctx, m.Run, m.SMBConf)
 		return fmt.Errorf("testparm rejected the config, previous file restored: %s", firstLines(out, 4))
 	}
-	active := c.SMB.Enabled && len(c.SMB.Shares) > 0
+	active := len(own.SMB.Shares) > 0 || external > 0
 	if !active {
 		_, err := m.Run(ctx, "", "systemctl", "disable", "--now", "smbd", "nmbd")
 		if err != nil {
@@ -96,17 +106,22 @@ func (m *Manager) applySMB(c Config) error {
 	if out, err := m.Run(ctx, "", "smbcontrol", "all", "reload-config"); err != nil {
 		return fmt.Errorf("reload smbd: %s", firstLines(out, 2))
 	}
-	log.Printf("shares: SMB config applied, %d shares", len(c.SMB.Shares))
+	log.Printf("shares: SMB config applied, %d shares, %d from other services", len(own.SMB.Shares), external)
 	return nil
 }
 
 func (m *Manager) applyNFS(c Config) error {
 	ctx, cancel := m.ctx()
 	defer cancel()
-	if err := hostrun.WriteFile(ctx, m.Run, m.Exports, RenderExports(c, m.UID, m.GID)); err != nil {
+	own := c
+	if !c.NFS.Enabled {
+		own.NFS.Exports = nil
+	}
+	external := countKind(m.External(), "nfs")
+	if err := hostrun.WriteFile(ctx, m.Run, m.Exports, RenderExports(own, m.UID, m.GID)); err != nil {
 		return fmt.Errorf("write %s: %w", m.Exports, err)
 	}
-	active := c.NFS.Enabled && len(c.NFS.Exports) > 0
+	active := len(own.NFS.Exports) > 0 || external > 0
 	if !active {
 		if _, err := m.Run(ctx, "", "systemctl", "disable", "--now", "nfs-server"); err != nil {
 			return fmt.Errorf("stop nfs-server: %w", err)
@@ -122,7 +137,7 @@ func (m *Manager) applyNFS(c Config) error {
 		_, _ = m.Run(ctx, "", "exportfs", "-ra")
 		return fmt.Errorf("exportfs rejected the exports, previous file restored: %s", firstLines(out, 4))
 	}
-	log.Printf("shares: NFS exports applied, %d exports", len(c.NFS.Exports))
+	log.Printf("shares: NFS exports applied, %d exports, %d from other services", len(own.NFS.Exports), external)
 	return nil
 }
 

internal/shares/external.go

@@ -0,0 +1,128 @@
+package shares
+
+import (
+	"os"
+	"path/filepath"
+	"sort"
+	"strings"
+)
+
+// Other services on the host (e.g. RepoISO) publish their own shares through
+// drop-in files. nasmon includes the SMB drop-ins into the smb.conf it
+// generates and keeps smbd / nfs-server running while any of them define a
+// share, even when nasmon itself has none.
+const (
+	DefaultSMBIncludeDir = "/etc/samba/smb.conf.d"
+	DefaultExportsDir    = "/etc/exports.d"
+)
+
+// ExternalShare is a share defined outside nasmon (read-only in the UI).
+type ExternalShare struct {
+	Kind    string // smb | nfs
+	Source  string // drop-in file name without extension, e.g. "repoiso"
+	Name    string // SMB share name (empty for NFS)
+	Path    string
+	Clients string // NFS clients with options, as written in the file
+}
+
+// IncludeFiles lists the *.conf drop-ins in dir, sorted. A missing dir yields nil.
+func IncludeFiles(dir string) []string {
+	if dir == "" {
+		return nil
+	}
+	m, _ := filepath.Glob(filepath.Join(dir, "*.conf"))
+	sort.Strings(m)
+	return m
+}
+
+func sourceName(file string) string {
+	return strings.TrimSuffix(filepath.Base(file), filepath.Ext(file))
+}
+
+// ParseSMBDropIn returns the shares ([section] other than [global], [homes],
+// [printers]) defined in a Samba config fragment.
+func ParseSMBDropIn(text, source string) []ExternalShare {
+	var out []ExternalShare
+	var cur *ExternalShare
+	for _, raw := range strings.Split(text, "\n") {
+		line := strings.TrimSpace(raw)
+		if line == "" || line[0] == '#' || line[0] == ';' {
+			continue
+		}
+		if strings.HasPrefix(line, "[") && strings.HasSuffix(line, "]") {
+			name := strings.TrimSpace(line[1 : len(line)-1])
+			switch strings.ToLower(name) {
+			case "global", "homes", "printers":
+				cur = nil
+			default:
+				out = append(out, ExternalShare{Kind: "smb", Source: source, Name: name})
+				cur = &out[len(out)-1]
+			}
+			continue
+		}
+		if cur == nil {
+			continue
+		}
+		if k, v, ok := strings.Cut(line, "="); ok && strings.EqualFold(strings.TrimSpace(k), "path") {
+			cur.Path = strings.TrimSpace(v)
+		}
+	}
+	return out
+}
+
+// ParseExportsFile returns the exports in an exports(5) file.
+func ParseExportsFile(text, source string) []ExternalShare {
+	var out []ExternalShare
+	for _, raw := range strings.Split(text, "\n") {
+		line := strings.TrimSpace(raw)
+		if line == "" || line[0] == '#' {
+			continue
+		}
+		var path, rest string
+		if line[0] == '"' {
+			if end := strings.Index(line[1:], `"`); end >= 0 {
+				path, rest = line[1:end+1], line[end+2:]
+			}
+		} else {
+			path, rest, _ = strings.Cut(line, " ")
+		}
+		if path == "" {
+			continue
+		}
+		out = append(out, ExternalShare{Kind: "nfs", Source: source, Path: path, Clients: strings.TrimSpace(rest)})
+	}
+	return out
+}
+
+// External reads the SMB drop-ins and the exports.d files of other services.
+func (m *Manager) External() []ExternalShare {
+	var out []ExternalShare
+	for _, f := range IncludeFiles(m.IncludeDir) {
+		if b, err := os.ReadFile(f); err == nil {
+			out = append(out, ParseSMBDropIn(string(b), sourceName(f))...)
+		}
+	}
+	if m.ExportsDir != "" {
+		files, _ := filepath.Glob(filepath.Join(m.ExportsDir, "*.exports"))
+		sort.Strings(files)
+		for _, f := range files {
+			if filepath.Clean(f) == filepath.Clean(m.Exports) {
+				continue
+			}
+			if b, err := os.ReadFile(f); err == nil {
+				out = append(out, ParseExportsFile(string(b), sourceName(f))...)
+			}
+		}
+	}
+	return out
+}
+
+func countKind(ext []ExternalShare, kind string) int {
+	n := 0
+	for _, e := range ext {
+		if e.Kind == kind {
+			n++
+		}
+	}
+	return n
+}

internal/shares/external_test.go

@@ -0,0 +1,111 @@
+package shares
+
+import (
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+const repoisoSMB = `# Managed by repoiso — do not edit
+
+[iso-pve]
+   path = /tank/iso/export/pve
+   read only = yes
+   guest ok = yes
+
+[global]
+   ; ignored
+`
+
+func writeDropIns(t *testing.T) (smbDir, nfsDir string) {
+	t.Helper()
+	root := t.TempDir()
+	smbDir, nfsDir = filepath.Join(root, "smb.conf.d"), filepath.Join(root, "exports.d")
+	for _, d := range []string{smbDir, nfsDir} {
+		if err := os.MkdirAll(d, 0o755); err != nil {
+			t.Fatal(err)
+		}
+	}
+	must := func(p, s string) {
+		if err := os.WriteFile(p, []byte(s), 0o644); err != nil {
+			t.Fatal(err)
+		}
+	}
+	must(filepath.Join(smbDir, "repoiso.conf"), repoisoSMB)
+	must(filepath.Join(smbDir, "notes.txt"), "[ignored]\n")
+	must(filepath.Join(nfsDir, "repoiso.exports"), "# Managed by repoiso\n\"/tank/iso/export/pve\" 10.10.0.0/24(ro,root_squash)\n")
+	must(filepath.Join(nfsDir, "nasmon.exports"), "\"/data\" *(rw)\n")
+	return
+}
+
+func TestParseDropIns(t *testing.T) {
+	smb := ParseSMBDropIn(repoisoSMB, "repoiso")
+	if len(smb) != 1 || smb[0].Name != "iso-pve" || smb[0].Path != "/tank/iso/export/pve" || smb[0].Source != "repoiso" {
+		t.Fatalf("smb: %+v", smb)
+	}
+	nfs := ParseExportsFile("# c\n/plain host(ro)\n\"/with space\" 10.0.0.0/8(ro)\n\n", "x")
+	if len(nfs) != 2 || nfs[0].Path != "/plain" || nfs[1].Path != "/with space" || nfs[1].Clients != "10.0.0.0/8(ro)" {
+		t.Fatalf("nfs: %+v", nfs)
+	}
+}
+
+func TestExternalSkipsOwnExports(t *testing.T) {
+	smbDir, nfsDir := writeDropIns(t)
+	m := newManager(newFake())
+	m.IncludeDir, m.ExportsDir, m.Exports = smbDir, nfsDir, filepath.Join(nfsDir, "nasmon.exports")
+	ext := m.External()
+	if countKind(ext, "smb") != 1 || countKind(ext, "nfs") != 1 {
+		t.Fatalf("external: %+v", ext)
+	}
+	if got := IncludeFiles(smbDir); len(got) != 1 || !strings.HasSuffix(got[0], "repoiso.conf") {
+		t.Fatalf("includes: %v", got)
+	}
+}
+
+func TestRenderSMBIncludes(t *testing.T) {
+	out := RenderSMB(sample(), "ansible", "/etc/samba/smb.conf.d/repoiso.conf")
+	if !strings.HasSuffix(strings.TrimSpace(out), "include = /etc/samba/smb.conf.d/repoiso.conf") {
+		t.Fatalf("include not at the end:\n%s", out)
+	}
+	if strings.Contains(RenderSMB(sample(), "ansible"), "include =") {
+		t.Fatal("include rendered without drop-ins")
+	}
+}
+
+// The bug this guards against: nasmon without own shares disabled smbd and
+// nfs-server and killed the shares RepoISO publishes for Proxmox.
+func TestApplyKeepsServicesForOtherServices(t *testing.T) {
+	smbDir, nfsDir := writeDropIns(t)
+	f := newFake()
+	m := newManager(f)
+	m.IncludeDir, m.ExportsDir, m.Exports = smbDir, nfsDir, filepath.Join(nfsDir, "nasmon.exports")
+	if err := m.Apply(Defaults()); err != nil {
+		t.Fatal(err)
+	}
+	if f.has("systemctl disable") {
+		t.Fatalf("services disabled although other services share: %v", f.calls)
+	}
+	if !f.has("systemctl enable --now smbd nmbd") || !f.has("systemctl enable --now nfs-server") || !f.has("exportfs -ra") {
+		t.Fatalf("services not kept running: %v", f.calls)
+	}
+	wi := f.index("sh -c")
+	if !strings.Contains(f.stdin[f.calls[wi]], "include = "+filepath.Join(smbDir, "repoiso.conf")) {
+		t.Errorf("smb.conf lacks the drop-in include")
+	}
+}
+
+func TestApplyDisabledSMBHidesOwnShares(t *testing.T) {
+	smbDir, _ := writeDropIns(t)
+	f := newFake()
+	m := newManager(f)
+	m.IncludeDir = smbDir
+	c := sample()
+	c.SMB.Enabled = false
+	if err := m.Apply(c); err != nil {
+		t.Fatal(err)
+	}
+	if strings.Contains(f.stdin[f.calls[f.index("sh -c")]], "[documents]") {
+		t.Errorf("disabled nasmon shares still rendered while smbd stays up for others")
+	}
+}

internal/shares/render.go

@@ -26,8 +26,9 @@ func anyGuest(c Config) bool {
 
 // RenderSMB produces the complete smb.conf. owner is the Unix account every
 // SMB session acts as (force user), so files end up with the same owner the
-// containers use.
-func RenderSMB(c Config, owner string) string {
+// containers use. includes are drop-in files of other services appended as
+// "include =" lines.
+func RenderSMB(c Config, owner string, includes ...string) string {
 	var b strings.Builder
 	fmt.Fprintf(&b, "%s\n\n[global]\n", Header)
 	// Bad User turns unknown accounts (e.g. the Windows login) into guests.
@@ -98,6 +99,12 @@ func RenderSMB(c Config, owner string) string {
 			fmt.Fprintf(&b, "   %s\n", l)
 		}
 	}
+	if len(includes) > 0 {
+		b.WriteString("\n# Shares of other services (read-only in nasmon)\n")
+		for _, f := range includes {
+			fmt.Fprintf(&b, "include = %s\n", f)
+		}
+	}
 	return b.String()
 }
 

internal/shares/shares_test.go

@@ -225,6 +225,7 @@ func newManager(f *fake) *Manager {
 	m := New(f.run)
 	m.LookPath = f.lookPath
 	m.Owner, m.UID, m.GID = "ansible", "1000", "1000"
+	m.IncludeDir, m.ExportsDir = "", "" // never read the host's drop-ins in tests
 	return m
 }
 

internal/web/handlers.go

@@ -465,6 +465,7 @@ func formToSettings(r *http.Request, old config.Settings) config.Settings {
 	c.SelfTests.ShortDays = num("st_short_days", old.SelfTests.ShortDays)
 	c.SelfTests.LongDays = num("st_long_days", old.SelfTests.LongDays)
 	c.SelfTests.Hour = num("st_hour", old.SelfTests.Hour)
+	c.Integrations.RepoISOURL = strings.TrimSpace(r.FormValue("repoiso_url"))
 	return c
 }
 

internal/web/integration_test.go

@@ -0,0 +1,87 @@
+package web
+
+import (
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"nasmon/internal/collect"
+	"nasmon/internal/shares"
+)
+
+func TestBrowserURL(t *testing.T) {
+	cases := []struct{ cfg, host, want string }{
+		{"", "nas:8090", ""},
+		{"http://127.0.0.1", "10.10.0.129:8090", "http://10.10.0.129"},
+		{"http://localhost:8080/", "nas.lan:8090", "http://nas.lan:8080/"},
+		{"https://repo.example.com", "10.0.0.1:8090", "https://repo.example.com"},
+		{"http://127.0.0.1", "[fe80::1]:8090", "http://[fe80::1]"},
+	}
+	for _, c := range cases {
+		if got := browserURL(c.cfg, c.host); got != c.want {
+			t.Errorf("browserURL(%q, %q) = %q, want %q", c.cfg, c.host, got, c.want)
+		}
+	}
+}
+
+func TestRepoISOIntegrationUI(t *testing.T) {
+	srv, sc, _ := newTestServer(t)
+	// settings: save the URL, menu link appears
+	rec := postForm(srv, "/settings", url.Values{"smtp_port": {"587"}, "smtp_security": {"starttls"},
+		"smart_interval": {"30"}, "repoiso_url": {"http://127.0.0.1/"}})
+	if rec.Code != 200 || srv.cfg.Get().Integrations.RepoISOURL != "http://127.0.0.1" {
+		t.Fatalf("settings not saved: %d %q", rec.Code, srv.cfg.Get().Integrations.RepoISOURL)
+	}
+	rec = postForm(srv, "/settings", url.Values{"smtp_port": {"587"}, "smtp_security": {"starttls"},
+		"smart_interval": {"30"}, "repoiso_url": {"ftp://x"}})
+	if !strings.Contains(rec.Body.String(), "RepoISO URL must start") {
+		t.Errorf("bad URL accepted")
+	}
+
+	st := sc.Status()
+	st.RepoISO = &collect.RepoISO{URL: "http://127.0.0.1", Reachable: true, WorkerAlive: true, Version: "0.1.3",
+		Images: 61, ImagesBytes: 350 << 30, Publications: 2, JobsFailed24h: 1, Exports: 1}
+	sc.SetStatus(st)
+	rec = httptest.NewRecorder()
+	req := httptest.NewRequest("GET", "/", nil)
+	req.Host = "10.10.0.129:8090"
+	srv.ServeHTTP(rec, req)
+	body := rec.Body.String()
+	for _, want := range []string{`href="http://10.10.0.129"`, "RepoISO ↗", `id="repoiso"`, "v0.1.3", "1 failed in 24 h"} {
+		if !strings.Contains(body, want) {
+			t.Errorf("dashboard lacks %q", want)
+		}
+	}
+
+	st.RepoISO = &collect.RepoISO{URL: "http://127.0.0.1", Error: "connection refused"}
+	sc.SetStatus(st)
+	rec = httptest.NewRecorder()
+	srv.ServeHTTP(rec, httptest.NewRequest("GET", "/", nil))
+	if !strings.Contains(rec.Body.String(), "not responding") {
+		t.Errorf("unreachable RepoISO not shown")
+	}
+}
+
+func TestSharesPageListsExternal(t *testing.T) {
+	srv, _, _ := newTestServer(t)
+	f := &shareRunner{}
+	withShareRunner(srv, f)
+	dir := t.TempDir()
+	smbDir, nfsDir := filepath.Join(dir, "smb.conf.d"), filepath.Join(dir, "exports.d")
+	_ = os.MkdirAll(smbDir, 0o755)
+	_ = os.MkdirAll(nfsDir, 0o755)
+	_ = os.WriteFile(filepath.Join(smbDir, "repoiso.conf"), []byte("[iso-pve]\n   path = /tank/iso/export/pve\n"), 0o644)
+	_ = os.WriteFile(filepath.Join(nfsDir, "repoiso.exports"), []byte("\"/tank/iso/export/pve\" 10.10.0.0/24(ro)\n"), 0o644)
+	srv.shm.IncludeDir, srv.shm.ExportsDir, srv.shm.Exports = smbDir, nfsDir, filepath.Join(nfsDir, shares.DefaultExports)
+	rec := httptest.NewRecorder()
+	srv.ServeHTTP(rec, httptest.NewRequest("GET", "/shares", nil))
+	body := rec.Body.String()
+	for _, want := range []string{`id="external"`, "iso-pve", "/tank/iso/export/pve", "10.10.0.0/24(ro)", "RepoISO"} {
+		if !strings.Contains(body, want) {
+			t.Errorf("shares page lacks %q", want)
+		}
+	}
+}

internal/web/server.go

@@ -8,7 +8,9 @@ import (
 	"io/fs"
 	"log"
 	"math"
+	"net"
 	"net/http"
+	"net/url"
 	"path/filepath"
 	"strings"
 	"sync"
@@ -105,6 +107,7 @@ type pageData struct {
 	Data    any
 	Flash   string
 	Error   string
+	RepoISO string // browser URL of the RepoISO portal ("" = integration off)
 }
 
 // render writes a full page, or only the "content" block when ?partial=1 is
@@ -112,6 +115,7 @@ type pageData struct {
 func (s *Server) render(w http.ResponseWriter, r *http.Request, name string, pd pageData) {
 	pd.Page = name
 	pd.Partial = r.URL.Query().Get("partial") == "1"
+	pd.RepoISO = browserURL(s.cfg.Get().Integrations.RepoISOURL, r.Host)
 	if pd.Alerts == 0 {
 		pd.Alerts = len(s.sch.Status().Alerts)
 	}
@@ -288,3 +292,33 @@ func sparkline(vals []float64, max float64, class string) template.HTML {
 		`<svg class="spark %s" viewBox="0 0 %d %d" preserveAspectRatio="none"><polygon points="0,%d %s %d,%d"/><polyline points="%s"/></svg>`,
 		class, int(w), int(h), int(h), p, int(w), int(h), p))
 }
+
+// browserURL turns the configured RepoISO address into one the user's browser
+// can open: a loopback host is replaced by the host the browser used for nasmon.
+func browserURL(cfg, reqHost string) string {
+	if cfg == "" {
+		return ""
+	}
+	u, err := url.Parse(cfg)
+	if err != nil || u.Host == "" {
+		return cfg
+	}
+	switch u.Hostname() {
+	case "127.0.0.1", "localhost", "::1":
+		host := reqHost
+		if h, _, err := net.SplitHostPort(reqHost); err == nil {
+			host = h
+		}
+		if host == "" {
+			return cfg
+		}
+		if strings.Contains(host, ":") {
+			host = "[" + host + "]"
+		}
+		if p := u.Port(); p != "" {
+			host += ":" + p
+		}
+		u.Host = host
+	}
+	return u.String()
+}

internal/web/shares.go

@@ -39,6 +39,7 @@ type sharesVM struct {
 	NForm       nfsForm
 	ApplyErr    string // last Apply failure: config saved but not live
 	Squashes    []string
+	External    []shares.ExternalShare // shares of other services (drop-ins), read-only
 }
 
 func (s *Server) applyErr() string {
@@ -96,6 +97,7 @@ func (s *Server) sharesView(st sched.Status, form smbForm, nform nfsForm) shares
 			vm.NForm.Squash = "root"
 		}
 	}
+	vm.External = s.shm.External()
 	if u, err := s.shm.ListUsers(); err == nil {
 		vm.Users = u
 	} else {

internal/web/shares_test.go

@@ -59,6 +59,7 @@ func withShareRunner(srv *Server, f *shareRunner) {
 	srv.shm = shares.New(f.run)
 	srv.shm.LookPath = func(string) (string, error) { return "/usr/sbin/x", nil }
 	srv.shm.Owner, srv.shm.UID, srv.shm.GID = "ansible", "1000", "1000"
+	srv.shm.IncludeDir, srv.shm.ExportsDir = "", ""
 }
 
 func TestSharesSMBFlow(t *testing.T) {

internal/web/templates/dashboard.html

@@ -104,6 +104,26 @@
   </table></div>
 </section>
 
+{{with .S.RepoISO}}
+<section class="card" id="repoiso">
+  <h2>RepoISO {{if $.RepoISO}}<a class="muted small" href="{{$.RepoISO}}" target="_blank" rel="noopener">open ↗</a>{{end}}
+    {{if not .Reachable}}<span class="badge crit">not responding</span>
+    {{else if not .WorkerAlive}}<span class="badge warn">worker stopped</span>
+    {{else}}<span class="badge ok">running</span>{{end}}
+    {{if .Version}}<span class="muted small">v{{.Version}}</span>{{end}}</h2>
+  {{if not .Reachable}}<div class="flash crit">{{.URL}}/api/integration/status: {{.Error}}</div>{{else}}
+  <div class="tablewrap"><table class="compact">
+    <tbody>
+      <tr><td class="muted">Images</td><td class="num">{{.Images}}</td><td>{{bytes .ImagesBytes}}{{if .ImagesPending}} · <span class="muted">{{.ImagesPending}} being checked</span>{{end}}{{if .ImagesError}} · <span class="crit">{{.ImagesError}} with errors</span>{{end}}</td></tr>
+      <tr><td class="muted">Publications</td><td class="num">{{.Publications}}</td><td>{{if .PublicationsError}}<span class="badge warn">{{.PublicationsError}} not mounted</span>{{else}}<span class="muted">HTTP repositories / file trees</span>{{end}}</td></tr>
+      <tr><td class="muted">Jobs</td><td class="num">{{.JobsActive}}</td><td>{{if .JobsActive}}active{{else}}<span class="muted">idle</span>{{end}}{{if .JobsFailed24h}} · <span class="badge warn">{{.JobsFailed24h}} failed in 24 h</span>{{end}}</td></tr>
+      <tr><td class="muted">Proxmox exports</td><td class="num">{{.Exports}}</td><td class="muted">NFS / SMB shares — listed on <a href="/shares#external">Shares</a></td></tr>
+      <tr><td class="muted">Worker</td><td></td><td class="small">{{if .WorkerHeartbeat}}last heartbeat {{.WorkerHeartbeat}}{{else}}no heartbeat yet{{end}}</td></tr>
+    </tbody>
+  </table></div>{{end}}
+</section>
+{{end}}
+
 <section class="card">
   <h2>Datasets</h2>
   <div class="tablewrap"><table>

internal/web/templates/layout.html

@@ -16,6 +16,7 @@
     <a href="/shares" {{if eq .Page "shares"}}class="on"{{end}}>Shares</a>
     <a href="/alerts" {{if eq .Page "alerts"}}class="on"{{end}}>Alerts{{if .Alerts}} <span class="badge crit">{{.Alerts}}</span>{{end}}</a>
     <a href="/settings" {{if eq .Page "settings"}}class="on"{{end}}>Settings</a>
+    {{if .RepoISO}}<a href="{{.RepoISO}}" target="_blank" rel="noopener" title="ISO library, repositories, Proxmox exports">RepoISO ↗</a>{{end}}
   </nav>
   <span class="refresh" id="refresh-state" title="auto-refresh"></span>
 </header>

internal/web/templates/settings.html

@@ -67,6 +67,17 @@
   <p class="muted small">Tests start only for disks that are awake. A long test on a large HDD takes many hours; disk stays usable.</p>
 </section>
 
+<section class="card">
+  <h2>Integrations</h2>
+  <div class="form-grid">
+    <label class="wide">RepoISO URL <input name="repoiso_url" value="{{$c.Integrations.RepoISOURL}}" placeholder="http://127.0.0.1"></label>
+  </div>
+  <p class="muted small">RepoISO (ISO library, apt/dnf repositories, Proxmox ISO exports) on this host. nasmon polls
+    <span class="mono">&lt;url&gt;/api/integration/status</span> every minute, shows a dashboard card, alerts when the portal
+    or its worker is down, and adds a menu link. Use the local address (<span class="mono">http://127.0.0.1</span>) — the
+    status endpoint only answers on loopback. Empty disables the integration.</p>
+</section>
+
 <div class="actions">
   <button type="submit" name="action" value="save">Save</button>
   <button type="submit" name="action" value="test" class="secondary">Save &amp; send test e-mail</button>

internal/web/templates/shares.html

@@ -140,5 +140,26 @@
   </details>
   <p class="muted small">Linux: <span class="mono">sudo mount -t nfs {{.Host}}:/nas_pool_1_8_gb/documents /mnt/nas</span>; list exports with <span class="mono">showmount -e {{.Host}}</span>.</p>
 </section>
+
+{{if .External}}
+<section class="card" id="external">
+  <h2>Shares of other services <span class="muted small">read-only</span></h2>
+  <p class="muted small">Defined by other software on this host in <span class="mono">/etc/samba/smb.conf.d/*.conf</span>
+    (included into smb.conf) and <span class="mono">/etc/exports.d/*.exports</span>. Manage them in that software;
+    nasmon keeps smbd / nfs-server running while any of them exist.</p>
+  <div class="tablewrap"><table>
+    <thead><tr><th>Type</th><th>Source</th><th>Name</th><th>Path</th><th>Clients</th></tr></thead>
+    <tbody>
+    {{range .External}}<tr>
+      <td><span class="badge">{{if eq .Kind "smb"}}SMB{{else}}NFS{{end}}</span></td>
+      <td>{{if eq .Source "repoiso"}}{{if $.RepoISO}}<a href="{{$.RepoISO}}/proxmox" target="_blank" rel="noopener">RepoISO</a>{{else}}RepoISO{{end}}{{else}}{{.Source}}{{end}}</td>
+      <td class="mono">{{if .Name}}\\{{$.Data.Host}}\{{.Name}}{{else}}—{{end}}</td>
+      <td class="mono small">{{.Path}}</td>
+      <td class="mono small">{{.Clients}}</td>
+    </tr>{{end}}
+    </tbody>
+  </table></div>
+</section>
+{{end}}
 {{end}}
 {{end}}