Report version and auto-update state to Hammerhead and update on request

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

bamboo.go

@@ -21,6 +21,7 @@ import (
 	"strconv"
 	"strings"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"git.veillax.com/Veillax/reef/docker"
@@ -34,6 +35,11 @@ type Config struct {
 	Token      string
 	DataDir    string // holds this agent's WireGuard key
 	Docker     bool   // report local Docker containers so they can be picked as targets
+
+	// Version, AutoUpdate and UpdateNow work as in blacktip.Config.
+	Version    string
+	AutoUpdate bool
+	UpdateNow  func(ctx context.Context) (newVersion string, err error)
 }
 
 type Bamboo struct {
@@ -50,6 +56,10 @@ type Bamboo struct {
 	edges   []model.EdgeRef
 	lastRep string
 
+	updating  atomic.Bool
+	updateMsg string // outcome of the update Hammerhead asked for, reported back
+	updateID  string // the request that updateMsg answers
+
 	mail    map[string]*mailRun
 	mailErr map[string]string // mail egress ID -> "" (listening) or an error
 }
@@ -143,6 +153,9 @@ func (b *Bamboo) apply(cfg *model.SiteConfig) {
 	b.mu.Lock()
 	b.version = cfg.Version
 	b.edges = cfg.Edges
+	if cfg.UpdateID != "" {
+		b.requestUpdate(cfg.UpdateID)
+	}
 	if cfg.TunnelIP != b.tunIP && b.tun != nil {
 		b.tun.Close()
 		b.tun = nil
@@ -246,7 +259,11 @@ func (b *Bamboo) report() {
 		containers, _ = docker.List(ctx)
 		cancel()
 	}
-	body, _ := json.Marshal(model.SiteReport{PublicKey: b.wgPub, Connected: ids, Containers: containers, MailEgress: b.mailStatus()})
+	b.mu.Lock()
+	msg, uid := b.updateMsg, b.updateID
+	b.mu.Unlock()
+	body, _ := json.Marshal(model.SiteReport{PublicKey: b.wgPub, Connected: ids, Containers: containers, MailEgress: b.mailStatus(),
+		Version: b.cfg.Version, AutoUpdate: b.cfg.AutoUpdate, UpdateMsg: msg, UpdateID: uid})
 	req, _ := http.NewRequest("POST", b.cfg.Hammerhead+"/site/report", bytes.NewReader(body))
 	req.Header.Set("Authorization", "Bearer "+b.cfg.Token)
 	req.Header.Set("Content-Type", "application/json")
@@ -414,3 +431,38 @@ func serveUDP(pc net.PacketConn) {
 		}
 	}
 }
+
+// requestUpdate acts on "update now" from Hammerhead (id identifies the request). It only ever installs
+// what this machine's own auto-update would (the newest release from its configured server), and only
+// when auto-update is on. Caller holds b.mu.
+func (b *Bamboo) requestUpdate(id string) {
+	if id == b.updateID {
+		return // already handled, or in progress
+	}
+	b.updateID, b.updateMsg = id, ""
+	if !b.cfg.AutoUpdate || b.cfg.UpdateNow == nil {
+		b.updateMsg = "auto-update is off on this machine (set BAMBOO_AUTO_UPDATE=1 and restart it)"
+		go b.report()
+		return
+	}
+	if !b.updating.CompareAndSwap(false, true) {
+		b.updateMsg = "another update is already running"
+		go b.report()
+		return
+	}
+	go func() {
+		defer b.updating.Store(false)
+		tag, err := b.cfg.UpdateNow(b.ctx) // on success this restarts the process and does not return
+		b.mu.Lock()
+		switch {
+		case err != nil:
+			b.updateMsg = "update failed: " + err.Error()
+		case tag == "":
+			b.updateMsg = "already on the newest release"
+		default:
+			b.updateMsg = "updated to " + tag + ", restarting"
+		}
+		b.mu.Unlock()
+		b.report()
+	}()
+}

cmd/bamboo/main.go

@@ -49,10 +49,13 @@ func main() {
 	log.Printf("bamboo %s starting", version)
 	ctx, stop := signal.NotifyContext(context.Background(), os.Interrupt)
 	defer stop()
+	upd := selfupdate.Config{Server: "https://git.veillax.com", Repo: "Veillax/bamboo", App: "bamboo", Current: version, Logf: log.Printf}
 	if *autoUpdate {
-		go selfupdate.Run(ctx, selfupdate.Config{Server: "https://git.veillax.com", Repo: "Veillax/bamboo", App: "bamboo", Current: version, Logf: log.Printf})
+		go selfupdate.Run(ctx, upd)
 	}
-	b, err := bamboo.New(bamboo.Config{Hammerhead: strings.TrimRight(*hh, "/"), Token: *token, DataDir: *data, Docker: *dockerOn})
+	b, err := bamboo.New(bamboo.Config{Hammerhead: strings.TrimRight(*hh, "/"), Token: *token, DataDir: *data, Docker: *dockerOn,
+		Version: version, AutoUpdate: *autoUpdate,
+		UpdateNow: func(ctx context.Context) (string, error) { return selfupdate.CheckOnce(ctx, upd) }})
 	if err != nil {
 		log.Fatal(err)
 	}

go.mod

@@ -2,7 +2,7 @@ module git.veillax.com/Veillax/bamboo
 
 go 1.27.3
 
-require git.veillax.com/Veillax/reef v0.1.3
+require git.veillax.com/Veillax/reef v0.1.6
 
 require (
 	github.com/Microsoft/go-winio v0.6.4 // indirect

go.sum

@@ -2,6 +2,10 @@ git.veillax.com/Veillax/reef v0.1.0 h1:O0OhEKFx2CsvACJ20sfzJNjGsngomtfDdKdxu4ROp
 git.veillax.com/Veillax/reef v0.1.0/go.mod h1:ZBUd/BARO5kkpUNTP81TTY1aQXLHFR6bKDhCxckjHso=
 git.veillax.com/Veillax/reef v0.1.3 h1:RxSq2xwaup1+MieAkhlvOTZnYwPf19thFHEAe/7VxsI=
 git.veillax.com/Veillax/reef v0.1.3/go.mod h1:ZBUd/BARO5kkpUNTP81TTY1aQXLHFR6bKDhCxckjHso=
+git.veillax.com/Veillax/reef v0.1.5 h1:BydjLJsfGgU4zEIqUsePJRjPi9NgbFdmvq0M8dvJCgM=
+git.veillax.com/Veillax/reef v0.1.5/go.mod h1:ZBUd/BARO5kkpUNTP81TTY1aQXLHFR6bKDhCxckjHso=
+git.veillax.com/Veillax/reef v0.1.6 h1:NgZ4u2Z3hJ+BYD/zX9lov8fox4s2i8txtYNOpIsikVo=
+git.veillax.com/Veillax/reef v0.1.6/go.mod h1:ZBUd/BARO5kkpUNTP81TTY1aQXLHFR6bKDhCxckjHso=
 github.com/Microsoft/go-winio v0.6.4 h1:kJF2pamtYCWXf0xAT8sAkwKC0pMl2HYBrRPHAqyUc+g=
 github.com/Microsoft/go-winio v0.6.4/go.mod h1:1xl5JXG4ze/m74GH6Dc4Mwxfc3VL5siRVQjIAlHH07U=
 github.com/google/btree v1.1.2 h1:xf4v41cLI2Z6FxbKm+8Bu+m8ifhj15JuZ9sa0jZCMUU=