diff --git a/BACKLOG.md b/BACKLOG.md
index 0755f29..2bfc274 100644
--- a/BACKLOG.md
+++ b/BACKLOG.md
@@ -2047,6 +2047,11 @@ lent, partition`); the leader tells each named node's agent (root) what to be, t
   reason does not start with "llmgw" is a Slurm administrator's and never resumed. Left: the TUI screen, P5,
   a try on the PoC (needs agents built from this; slurm-wlm 23.11 on Ubuntu 24.04), GPU minor numbers are
   taken to be nvidia-smi's index.
+- In the first install too (2026-11-11): `llmgw server init --slurm`, and a Slurm part on the choices
+  screen, write `slurm: {enabled, controller: <this hostname>, all_nodes: true}` into server.yaml.
+  `slurm.all_nodes` (also `ctl slurm setup --all-nodes`) runs slurmd on every node in the leader's
+  inventory, those that join later too; none is lent. Refused with `--no-node`, or a hostname Slurm does
+  not take.
 
 ## D. Facts worth knowing before starting
 
diff --git a/docs/install.md b/docs/install.md
index 228c5ba..dd14d2b 100644
--- a/docs/install.md
+++ b/docs/install.md
@@ -166,13 +166,26 @@ is a flag too, and the plan shows the command with them: `--starter qwen3-8b`
 `--judge-fail open`, `--judge-categories`, `--judge-replicas`,
 `--judge-budget`, `--language tr`, `--signup-open`, `--default-rpm`,
 `--default-tpm`, `--max-key-ttl`, `--media` (pictures and 3D: ComfyUI on the
-nodes, and `presets.auto`), `--evict-after-idle` and `--min-lifetime`. They
+nodes, and `presets.auto`), `--slurm` (see below), `--evict-after-idle` and `--min-lifetime`. They
 go into `server.yaml` as init writes it, and become the cluster's first
 settings when it starts; a `server.yaml` already there is never overwritten,
 so run again they change nothing — the settings page does. An NVIDIA card with no working
 driver is reported rather than silently ignored; install the driver and run
 init again to serve on it.
 
+**Slurm, for training and batch jobs.** `--slurm`, or the Slurm part on the
+choices screen, runs a Slurm cluster beside llmgw: slurmctld on this
+machine's node, slurmd on every node, those that join later too
+(`slurm.all_nodes`). The agents install munge and Slurm (22.05 or newer)
+from the machines' own package sources. No node is Slurm's at first: each is
+drained in Slurm and serves models until `llmgw ctl slurm lend NODE` gives it
+to Slurm — its models move off first — and `llmgw ctl slurm reclaim NODE`
+takes it back once its jobs end. Jobs are submitted on this machine with
+`sbatch` and `srun`; `llmgw ctl slurm status` shows where each node is. It
+needs this machine to be a node, and its hostname to be a name Slurm takes.
+On a cluster installed without it, `llmgw ctl slurm setup --controller NODE
+--all-nodes` does the same later.
+
 **Secure by default.** What init writes is the hardened configuration, not a
 demonstration one:
 
diff --git a/docs/reference.md b/docs/reference.md
index d582b95..b6a0de5 100644
--- a/docs/reference.md
+++ b/docs/reference.md
@@ -406,6 +406,7 @@ rather than repeated.
 | `cluster_name` | `string` | [SlurmSettings](#slurmsettings) |
 | `controller` | `string` | [SlurmSettings](#slurmsettings) |
 | `nodes` | `[]string` | [SlurmSettings](#slurmsettings) |
+| `all_nodes` | `bool` | [SlurmSettings](#slurmsettings) |
 | `lent` | `[]string` | [SlurmSettings](#slurmsettings) |
 | `partition` | `string` | [SlurmSettings](#slurmsettings) |
 | `dir` | `string` | [StrataConfig](#strataconfig) |
@@ -3525,6 +3526,13 @@ GPU, and need not be one of Nodes.
 Nodes are the llmgw nodes that run slurmd. Each stays llmgw's, drained
 in Slurm, until it is also in Lent.
 
+### `all_nodes`
+
+`bool`
+
+AllNodes runs slurmd on every llmgw node, those that join later too,
+besides any named in Nodes. Each is llmgw's until it is lent, as any.
+
 ### `lent`
 
 `[]string`
diff --git a/internal/cli/ctl_slurm.go b/internal/cli/ctl_slurm.go
index 79ac4ec..aab49f2 100644
--- a/internal/cli/ctl_slurm.go
+++ b/internal/cli/ctl_slurm.go
@@ -91,17 +91,19 @@ func newSlurmStatusCmd(client func() *ctlClient, asJSON *bool) *cobra.Command {
 func newSlurmSetupCmd(client func() *ctlClient) *cobra.Command {
 	var controller, cluster, partition, note string
 	var nodes []string
+	var all bool
 	c := &cobra.Command{
-		Use:   "setup --controller NODE --nodes NODE,...",
+		Use:   "setup --controller NODE --nodes NODE,... | --all-nodes",
 		Short: "Run Slurm on llmgw's nodes: slurmctld on one, slurmd on those named",
-		Long: "Turns slurm.enabled on and names the nodes. Their agents install munge and Slurm (22.05 or\n" +
+		Long: "Turns slurm.enabled on and names the nodes, or with --all-nodes every node. Their agents install munge and Slurm (22.05 or\n" +
 			"newer) from the machines' own package sources. Every node starts drained in Slurm and stays\n" +
 			"llmgw's until `llmgw ctl slurm lend` gives it to Slurm.",
-		Example: "  llmgw ctl slurm setup --controller node06 --nodes cuda01,cuda02",
-		Args:    cobra.NoArgs,
+		Example: "  llmgw ctl slurm setup --controller node06 --nodes cuda01,cuda02\n" +
+			"  llmgw ctl slurm setup --controller node06 --all-nodes",
+		Args: cobra.NoArgs,
 		RunE: func(cmd *cobra.Command, _ []string) error {
-			if controller == "" || len(nodes) == 0 {
-				return fmt.Errorf("give --controller and --nodes")
+			if controller == "" || (len(nodes) == 0 && !all) {
+				return fmt.Errorf("give --controller, and --nodes or --all-nodes")
 			}
 			return changeSettings(cmd, client, note, func(doc *settings.Doc) error {
 				if err := doc.SetYAML([]string{"slurm", "enabled"}, "true"); err != nil {
@@ -110,12 +112,15 @@ func newSlurmSetupCmd(client func() *ctlClient) *cobra.Command {
 				if err := doc.SetYAML([]string{"slurm", "controller"}, yamlString(controller)); err != nil {
 					return err
 				}
-				if err := doc.SetYAML([]string{"slurm", "nodes"}, yamlList(nodes)); err != nil {
+				if err := setList(doc, []string{"slurm", "nodes"}, nodes); err != nil {
+					return err
+				}
+				if err := doc.SetYAML([]string{"slurm", "all_nodes"}, fmt.Sprint(all)); err != nil {
 					return err
 				}
 				// Lent nodes no longer named are not lent.
 				lent := slices.DeleteFunc(docList(doc, []string{"slurm", "lent"}),
-					func(n string) bool { return !slices.Contains(nodes, n) })
+					func(n string) bool { return !all && !slices.Contains(nodes, n) })
 				if err := setList(doc, []string{"slurm", "lent"}, lent); err != nil {
 					return err
 				}
@@ -132,6 +137,7 @@ func newSlurmSetupCmd(client func() *ctlClient) *cobra.Command {
 	}
 	c.Flags().StringVar(&controller, "controller", "", "the node that runs slurmctld")
 	c.Flags().StringSliceVar(&nodes, "nodes", nil, "the nodes that run slurmd")
+	c.Flags().BoolVar(&all, "all-nodes", false, "every node runs slurmd, those that join later too")
 	c.Flags().StringVar(&cluster, "cluster-name", "", "Slurm's ClusterName (llmgw)")
 	c.Flags().StringVar(&partition, "partition", "", "the partition every node is in (gpu)")
 	c.Flags().StringVar(&note, "note", "", "why, kept with the settings' version")
@@ -173,10 +179,11 @@ func newSlurmListCmd(client func() *ctlClient, use, short string, add bool) *cob
 		RunE: func(cmd *cobra.Command, args []string) error {
 			return changeSettings(cmd, client, note, func(doc *settings.Doc) error {
 				nodes := docList(doc, []string{"slurm", "nodes"})
+				all := docBool(doc, []string{"slurm", "all_nodes"})
 				lent := docList(doc, []string{"slurm", "lent"})
 				for _, n := range args {
 					switch {
-					case add && !slices.Contains(nodes, n):
+					case add && !all && !slices.Contains(nodes, n):
 						return fmt.Errorf("%s does not run slurmd: add it with `llmgw ctl slurm setup --nodes`", n)
 					case add && !slices.Contains(lent, n):
 						lent = append(lent, n)
@@ -205,6 +212,15 @@ func docList(doc *settings.Doc, path []string) []string {
 	return out
 }
 
+// docBool reads a boolean from the settings, false when unset.
+func docBool(doc *settings.Doc, path []string) bool {
+	var b bool
+	if n := doc.Node(path); n != nil {
+		_ = n.Decode(&b)
+	}
+	return b
+}
+
 func setList(doc *settings.Doc, path []string, list []string) error {
 	if len(list) == 0 {
 		if doc.Node(path) != nil {
diff --git a/internal/cli/serverinit.go b/internal/cli/serverinit.go
index 0286442..bb1da4d 100644
--- a/internal/cli/serverinit.go
+++ b/internal/cli/serverinit.go
@@ -124,6 +124,9 @@ type serverInit struct {
 	// media has the nodes install ComfyUI and the leader add a picture model
 	// and a 3D model once a card fits one.
 	media bool
+	// slurm runs Slurm beside llmgw: slurmctld on this machine's node,
+	// slurmd on every node, each llmgw's until it is lent.
+	slurm bool
 	// evictAfterIdle and minLifetime are on_demand's; zero leaves its own.
 	evictAfterIdle, minLifetime time.Duration
 	// standbys makes each machine of the replicated store a control plane
@@ -258,6 +261,8 @@ func newServerInitCmd() *cobra.Command {
 	f.DurationVar(&in.maxKeyTTL, "max-key-ttl", defaultMaxKeyTTL, "the longest an API key lives")
 	f.BoolVar(&in.media, "media", false,
 		"pictures and 3D: the nodes install ComfyUI, and a picture model and a 3D model are added once a card fits one")
+	f.BoolVar(&in.slurm, "slurm", false,
+		"Slurm for training and batch jobs: slurmctld on this machine, slurmd on every node, each llmgw's until 'llmgw ctl slurm lend'")
 	f.DurationVar(&in.evictAfterIdle, "evict-after-idle", 0,
 		"how long a model loaded on demand goes unasked-for before another may have its card (0: 2m)")
 	f.DurationVar(&in.minLifetime, "min-lifetime", 0,
diff --git a/internal/cli/serverinit_choices.go b/internal/cli/serverinit_choices.go
index 801d593..bc0ef9f 100644
--- a/internal/cli/serverinit_choices.go
+++ b/internal/cli/serverinit_choices.go
@@ -13,6 +13,7 @@ import (
 	"time"
 
 	"gitea.mynodes.xyz/ilker/llmgw/internal/agent/provision"
+	"gitea.mynodes.xyz/ilker/llmgw/internal/config"
 	"gitea.mynodes.xyz/ilker/llmgw/internal/pgha"
 	"gitea.mynodes.xyz/ilker/llmgw/internal/preflight"
 )
@@ -132,9 +133,18 @@ func (in *serverInit) checkChoices() error {
 		return fmt.Errorf("max key ttl %s: an hour at least", in.maxKeyTTL)
 	case in.evictAfterIdle < 0 || in.minLifetime < 0:
 		return fmt.Errorf("on-demand times cannot be negative")
+	case in.slurm && in.noNode:
+		return fmt.Errorf("slurm runs slurmctld on this machine's node: it needs the node (no --no-node)")
 	case in.vip != "" && !in.standbys:
 		return fmt.Errorf("a floating address moves between control planes: it needs the standbys")
 	}
+	if in.slurm {
+		// The controller is this machine's node, named by its hostname: a
+		// name Slurm does not take would keep the server from starting.
+		if err := (config.SlurmSettings{Enabled: true, Controller: localNodeID()}).Check(); err != nil {
+			return fmt.Errorf("slurm: this machine's hostname: %w", err)
+		}
+	}
 	if in.vip != "" {
 		ip, _, err := net.ParseCIDR(in.vip)
 		if err != nil || ip.To4() == nil {
@@ -318,6 +328,9 @@ func (in *serverInit) tuneConfig(body string) string {
 			"# one ('llmgw ctl model presets auto off' stops it).\n"+
 			"engines:\n  comfyui: "+provision.ComfyUIVersion()+"\npresets:\n  auto: true\n")
 	}
+	if in.slurm {
+		extra = append(extra, slurmSection(localNodeID()))
+	}
 	if in.evictAfterIdle > 0 || in.minLifetime > 0 {
 		b := "# How models that load when asked for take turns on a card, chosen at\n# install.\non_demand:\n"
 		if in.evictAfterIdle > 0 {
@@ -334,6 +347,24 @@ func (in *serverInit) tuneConfig(body string) string {
 	return body
 }
 
+// slurmSection is server.yaml's slurm block as an install chooses it:
+// slurmctld on this machine's node, slurmd on every node.
+func slurmSection(controller string) string {
+	return "# Slurm beside llmgw, chosen at install: slurmctld on this machine, slurmd on\n" +
+		"# every node, those that join later too. Each node is llmgw's, drained in\n" +
+		"# Slurm, until 'llmgw ctl slurm lend NODE' gives it to Slurm; 'llmgw ctl slurm\n" +
+		"# reclaim NODE' takes it back once its jobs end.\n" +
+		"slurm:\n  enabled: true\n  controller: " + yamlString(controller) + "\n  all_nodes: true\n"
+}
+
+// localNodeID is the node id this machine's agent takes: its hostname.
+func localNodeID() string {
+	if h, err := os.Hostname(); err == nil && h != "" {
+		return h
+	}
+	return "localhost"
+}
+
 // durationYAML is a duration as a person writes it: 2h, 90m, 1m30s.
 func durationYAML(d time.Duration) string {
 	switch {
@@ -467,6 +498,9 @@ func (in *serverInit) initFlags() []string {
 	if in.media {
 		add("--media")
 	}
+	if in.slurm {
+		add("--slurm")
+	}
 	if in.evictAfterIdle > 0 {
 		add("--evict-after-idle", durationYAML(in.evictAfterIdle))
 	}
diff --git a/internal/cli/serverinit_choices_test.go b/internal/cli/serverinit_choices_test.go
index b6ca6ec..4f0b154 100644
--- a/internal/cli/serverinit_choices_test.go
+++ b/internal/cli/serverinit_choices_test.go
@@ -17,7 +17,7 @@ import (
 func TestEveryChoiceIsInTheConfigurationWrittenAndItLoads(t *testing.T) {
 	in := &serverInit{
 		language: "tr", signupOpen: true, defaultRPM: 120, defaultTPM: 50000, maxKeyTTL: 30 * 24 * time.Hour,
-		media: true, evictAfterIdle: time.Minute, minLifetime: 90 * time.Second,
+		media: true, slurm: true, evictAfterIdle: time.Minute, minLifetime: 90 * time.Second,
 		judge: judgeSpec{Fail: "open", Categories: []string{"Violent", "PII"}, Replicas: 3, Budget: 3 * time.Second},
 	}
 	j := in.judgeFor()
@@ -41,6 +41,8 @@ func TestEveryChoiceIsInTheConfigurationWrittenAndItLoads(t *testing.T) {
 		t.Errorf("limits %d %d %s", cfg.Auth.DefaultRPM, cfg.Auth.DefaultTPM, cfg.Auth.MaxKeyTTL)
 	case !cfg.Presets.Auto || cfg.Engines["comfyui"] == "":
 		t.Errorf("pictures and 3D: presets %v comfyui %q", cfg.Presets.Auto, cfg.Engines["comfyui"])
+	case !cfg.Slurm.Enabled || !cfg.Slurm.AllNodes || cfg.Slurm.Controller != localNodeID():
+		t.Errorf("slurm %+v", cfg.Slurm)
 	case cfg.OnDemand.EvictAfterIdle != time.Minute || cfg.OnDemand.MinLifetime != 90*time.Second:
 		t.Errorf("on demand %+v", cfg.OnDemand)
 	}
@@ -95,14 +97,14 @@ func TestAStarterIsChosenByNameOrByItsFile(t *testing.T) {
 
 func TestTheChoicesAreTheirFlagsAgain(t *testing.T) {
 	in := &serverInit{admin: "ops@example.com", hosts: []string{"llm.example.com"}, postgres: true,
-		mirrorPath: "/data/models", noNode: true, language: "tr", media: true,
+		mirrorPath: "/data/models", language: "tr", media: true, slurm: true,
 		webhooks: []string{"https://hooks.slack.com/services/T/B/x, json:https://a.example.com/in"},
 		judge:    judgeSpec{Categories: []string{"Violent", "Jailbreak"}}, maxKeyTTL: 7 * 24 * time.Hour}
 	in.starter, _ = starterFrom("qwen3-4b")
 	got := strings.Join(in.initFlags(), " ")
 	want := "--admin ops@example.com --host llm.example.com --language tr --max-key-ttl 168h --postgres " +
-		"--mirror-dir /data/models --no-node --starter qwen3-4b --judge-categories Violent,Jailbreak " +
-		"--webhook https://hooks.slack.com/services/T/B/x --webhook json:https://a.example.com/in --media"
+		"--mirror-dir /data/models --starter qwen3-4b --judge-categories Violent,Jailbreak " +
+		"--webhook https://hooks.slack.com/services/T/B/x --webhook json:https://a.example.com/in --media --slurm"
 	if got != want {
 		t.Errorf("flags\n got %s\nwant %s", got, want)
 	}
@@ -124,6 +126,7 @@ func TestChoicesThatCannotBeInstalledAreRefused(t *testing.T) {
 		{maxKeyTTL: time.Minute},
 		{vip: "10.0.0.160/24"},
 		{standbys: true, vip: "10.0.0.160"},
+		{slurm: true, noNode: true},
 	} {
 		if err := in.checkChoices(); err == nil {
 			t.Errorf("taken: %+v", in)
diff --git a/internal/cli/tui_choices.go b/internal/cli/tui_choices.go
index e1db2c9..ead679d 100644
--- a/internal/cli/tui_choices.go
+++ b/internal/cli/tui_choices.go
@@ -57,7 +57,7 @@ type installForm struct {
 	standby *installPart
 	vipF    *setupField
 
-	control, store, mirror, node, starter, media, judge, firewall, alerts, limits, turns, bundle *installPart
+	control, store, mirror, node, starter, media, slurm, judge, firewall, alerts, limits, turns, bundle *installPart
 
 	admin, hosts, language, signup         *setupField
 	storeKind                              *setupField
@@ -282,6 +282,25 @@ func newInstallForm(in *serverInit, host string, found []string, ha bool) *insta
 		summary: func() string { return "ComfyUI; a picture model and a 3D model once a card fits" },
 	}
 
+	// --- Slurm ---
+	f.slurm = &installPart{
+		title: "Slurm", on: in.slurm,
+		about: "A Slurm cluster beside llmgw, for training and other batch work: slurmctld on this machine, " +
+			"slurmd on every node, those that join later too. The agents install munge and Slurm from the " +
+			"machines' own package sources.\n\n" +
+			"Each node stays llmgw's, drained in Slurm, until 'llmgw ctl slurm lend NODE' gives it to Slurm: " +
+			"its models move off first. 'llmgw ctl slurm reclaim NODE' takes it back once its jobs end. Jobs " +
+			"are submitted on this machine with sbatch and srun.",
+		off:     "no Slurm; 'llmgw ctl slurm setup' adds it later",
+		summary: func() string { return "slurmctld here, slurmd on every node; none lent" },
+		needs: func() string {
+			if !f.node.on {
+				return "slurmctld runs on this machine's node: turn the node on, or Slurm off"
+			}
+			return ""
+		},
+	}
+
 	// --- the guardrails' judge ---
 	j := in.judgeFor()
 	f.judgeFail = choiceField("When no judge answers in time", []string{"refuse", "serve flagged"},
@@ -421,7 +440,7 @@ func newInstallForm(in *serverInit, host string, found []string, ha bool) *insta
 	if ha {
 		f.parts = append(f.parts, f.standby)
 	}
-	f.parts = append(f.parts, f.mirror, f.node, f.starter, f.media, f.judge, f.firewall,
+	f.parts = append(f.parts, f.mirror, f.node, f.starter, f.media, f.slurm, f.judge, f.firewall,
 		f.alerts, f.limits, f.turns, f.bundle)
 	return f
 }
@@ -653,6 +672,7 @@ func (f *installForm) apply(in *serverInit) error {
 	in.noModel = !f.starter.on
 	in.starter, in.starterCtx = starter, ctx
 	in.media = f.media.on
+	in.slurm = f.slurm.on
 	in.noGuardModel = !f.judge.on
 	in.judge = judge
 	in.noFirewall = !f.firewall.on
diff --git a/internal/config/slurm.go b/internal/config/slurm.go
index 938ba56..e1b946e 100644
--- a/internal/config/slurm.go
+++ b/internal/config/slurm.go
@@ -26,6 +26,10 @@ type SlurmSettings struct {
 	// in Slurm, until it is also in Lent.
 	Nodes []string `koanf:"nodes"`
 
+	// AllNodes runs slurmd on every llmgw node, those that join later too,
+	// besides any named in Nodes. Each is llmgw's until it is lent, as any.
+	AllNodes bool `koanf:"all_nodes"`
+
 	// Lent are the nodes of Nodes Slurm may run jobs on now. A node put here
 	// is drained of llmgw's replicas first, as `ctl drain` does, and resumed
 	// in Slurm once none is left; a node taken out is drained in Slurm and
@@ -57,7 +61,23 @@ func (s SlurmSettings) PartitionName() string {
 
 // IsLent is whether Slurm may use the node now.
 func (s SlurmSettings) IsLent(node string) bool {
-	return s.Enabled && slices.Contains(s.Nodes, node) && slices.Contains(s.Lent, node)
+	return s.Enabled && (s.AllNodes || slices.Contains(s.Nodes, node)) && slices.Contains(s.Lent, node)
+}
+
+// WithNodes is the settings with every node of ids in Nodes when AllNodes:
+// the nodes that run slurmd, as the leader's inventory has them.
+func (s SlurmSettings) WithNodes(ids []string) SlurmSettings {
+	if !s.AllNodes {
+		return s
+	}
+	nodes := slices.Clone(s.Nodes)
+	for _, id := range ids {
+		if !slices.Contains(nodes, id) {
+			nodes = append(nodes, id)
+		}
+	}
+	s.Nodes = nodes
+	return s
 }
 
 // Check refuses settings Slurm could not run on.
@@ -87,7 +107,7 @@ func (s SlurmSettings) Check() error {
 		seen[n] = true
 	}
 	for i, n := range s.Lent {
-		if !seen[n] {
+		if !seen[n] && !s.AllNodes {
 			return fmt.Errorf("slurm.lent[%d] %q is not in slurm.nodes: only a node that runs slurmd can be lent", i, n)
 		}
 	}
diff --git a/internal/config/slurm_test.go b/internal/config/slurm_test.go
index c4fdf9f..78dbeb8 100644
--- a/internal/config/slurm_test.go
+++ b/internal/config/slurm_test.go
@@ -34,3 +34,20 @@ func TestSlurmCheck(t *testing.T) {
 		t.Error("a node is lent with Slurm off")
 	}
 }
+
+func TestSlurmAllNodes(t *testing.T) {
+	s := SlurmSettings{Enabled: true, Controller: "c", AllNodes: true, Lent: []string{"joined"}}
+	if err := s.Check(); err != nil {
+		t.Fatalf("a node lent with all_nodes refused: %v", err)
+	}
+	if !s.IsLent("joined") {
+		t.Fatal("not lent with all_nodes")
+	}
+	if got := s.WithNodes([]string{"a", "joined"}).Nodes; len(got) != 2 {
+		t.Fatalf("nodes %v", got)
+	}
+	s.AllNodes = false
+	if s.Check() == nil || len(s.WithNodes([]string{"a"}).Nodes) != 0 {
+		t.Fatal("all_nodes off still takes the inventory's nodes")
+	}
+}
diff --git a/internal/control/slurmsvc/service.go b/internal/control/slurmsvc/service.go
index 2245c76..a6321be 100644
--- a/internal/control/slurmsvc/service.go
+++ b/internal/control/slurmsvc/service.go
@@ -41,6 +41,7 @@ type Inventory interface {
 	Get(id string) (inventory.Node, bool)
 	SetState(id string, st inventory.NodeState) bool
 	Allocations(nodeID string) []inventory.Allocation
+	Nodes() []inventory.Node
 }
 
 // Phase is where a node of slurm.nodes is between llmgw and Slurm.
@@ -128,6 +129,20 @@ func New(settings func() config.SlurmSettings, inv Inventory, agents Agents,
 		kick: make(chan struct{}, 1)}
 }
 
+// current is the settings, slurm.all_nodes resolved to the nodes the
+// inventory has.
+func (s *Service) current() config.SlurmSettings {
+	set := s.settings()
+	if !set.AllNodes {
+		return set
+	}
+	var ids []string
+	for _, n := range s.inv.Nodes() {
+		ids = append(ids, n.ID)
+	}
+	return set.WithNodes(ids)
+}
+
 // Every is how often the service looks again without being asked.
 var Every = 10 * time.Second
 
@@ -182,7 +197,7 @@ func (s *Service) OnRegister(node string) {
 // Tick does one pass: the nodes handed over as far as they can be, and
 // each told what it is.
 func (s *Service) Tick(ctx context.Context) {
-	set := s.settings()
+	set := s.current()
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	phases := s.handOver(set)
@@ -361,7 +376,7 @@ func (s *Service) message(set config.SlurmSettings, node string, lent bool, key
 
 // Status is the cluster as the service sees it now.
 func (s *Service) Status() Status {
-	set := s.settings()
+	set := s.current()
 	s.mu.Lock()
 	defer s.mu.Unlock()
 	out := Status{Enabled: set.Enabled, Cluster: set.Cluster(), Controller: set.Controller,
diff --git a/internal/control/slurmsvc/service_test.go b/internal/control/slurmsvc/service_test.go
index 66d2753..e802004 100644
--- a/internal/control/slurmsvc/service_test.go
+++ b/internal/control/slurmsvc/service_test.go
@@ -2,6 +2,7 @@ package slurmsvc
 
 import (
 	"context"
+	"slices"
 	"strings"
 	"testing"
 
@@ -36,6 +37,15 @@ func (f *fakeInv) Allocations(id string) []inventory.Allocation {
 	return make([]inventory.Allocation, f.allocs[id])
 }
 
+func (f *fakeInv) Nodes() []inventory.Node {
+	var out []inventory.Node
+	for _, n := range f.nodes {
+		out = append(out, *n)
+	}
+	slices.SortFunc(out, func(a, b inventory.Node) int { return strings.Compare(a.ID, b.ID) })
+	return out
+}
+
 type fakeAgents struct {
 	conn []string
 	got  map[string][]*llmgwv1.Slurm
@@ -241,3 +251,24 @@ func TestNoControllerYet(t *testing.T) {
 		t.Fatalf("a node was started with no controller to fetch its files from: %v", m)
 	}
 }
+
+func TestAllNodes(t *testing.T) {
+	r := newRig()
+	r.set.Nodes, r.set.AllNodes = nil, true
+	r.inv.nodes["cuda02"] = &inventory.Node{ID: "cuda02", MgmtAddr: "10.0.0.150"}
+	r.agents.conn = append(r.agents.conn, "cuda02")
+	r.tick()
+	for _, n := range []string{"cuda01", "cuda02", "node06"} {
+		if !r.agents.last(n).GetNode() {
+			t.Fatalf("%s, a node that joined, does not run slurmd", n)
+		}
+	}
+	if got := len(r.svc.Status().Nodes); got != 3 {
+		t.Fatalf("%d nodes in the status", got)
+	}
+	r.set.Lent = []string{"cuda02"}
+	r.tick()
+	if p := r.svc.Status().Nodes[1]; p.Node != "cuda02" || p.Phase != Lent {
+		t.Fatalf("cuda02 not lent: %+v", p)
+	}
+}
diff --git a/internal/docgen/reference_gen.go b/internal/docgen/reference_gen.go
index 0e8abe5..77d7366 100644
--- a/internal/docgen/reference_gen.go
+++ b/internal/docgen/reference_gen.go
@@ -518,6 +518,7 @@ var Reference = []Block{
 		{Key: "cluster_name", Type: "string", Doc: "ClusterName is Slurm's ClusterName. Empty is \"llmgw\".", Nested: ""},
 		{Key: "controller", Type: "string", Doc: "Controller is the llmgw node whose agent runs slurmctld. It needs no\nGPU, and need not be one of Nodes.", Nested: ""},
 		{Key: "nodes", Type: "[]string", Doc: "Nodes are the llmgw nodes that run slurmd. Each stays llmgw's, drained\nin Slurm, until it is also in Lent.", Nested: ""},
+		{Key: "all_nodes", Type: "bool", Doc: "AllNodes runs slurmd on every llmgw node, those that join later too,\nbesides any named in Nodes. Each is llmgw's until it is lent, as any.", Nested: ""},
 		{Key: "lent", Type: "[]string", Doc: "Lent are the nodes of Nodes Slurm may run jobs on now. A node put here\nis drained of llmgw's replicas first, as `ctl drain` does, and resumed\nin Slurm once none is left; a node taken out is drained in Slurm and\ngiven back to llmgw when its last job ends.", Nested: ""},
 		{Key: "partition", Type: "string", Doc: "Partition is the one partition every node is in. Empty is \"gpu\".", Nested: ""},
 	}},