cluster layout: adapt all uses of ClusterLayout to LayoutHistory

2 files changed, 32 insertions, 23 deletions

diff --git a/src/garage/cli/cmd.rs b/src/garage/cli/cmd.rs
index 48359614..8be43873 100644
--- a/src/garage/cli/cmd.rs
+++ b/src/garage/cli/cmd.rs
@@ -62,7 +62,7 @@ pub async fn cmd_status(rpc_cli: &Endpoint<SystemRpc, ()>, rpc_host: NodeID) ->
 	let mut healthy_nodes =
 		vec!["ID\tHostname\tAddress\tTags\tZone\tCapacity\tDataAvail".to_string()];
 	for adv in status.iter().filter(|adv| adv.is_up) {
-		match layout.roles.get(&adv.id) {
+		match layout.current().roles.get(&adv.id) {
 			Some(NodeRoleV(Some(cfg))) => {
 				let data_avail = match &adv.status.data_disk_avail {
 					_ if cfg.capacity.is_none() => "N/A".into(),
@@ -102,10 +102,15 @@ pub async fn cmd_status(rpc_cli: &Endpoint<SystemRpc, ()>, rpc_host: NodeID) ->
 	format_table(healthy_nodes);
 
 	let status_keys = status.iter().map(|adv| adv.id).collect::<HashSet<_>>();
-	let failure_case_1 = status
-		.iter()
-		.any(|adv| !adv.is_up && matches!(layout.roles.get(&adv.id), Some(NodeRoleV(Some(_)))));
+	let failure_case_1 = status.iter().any(|adv| {
+		!adv.is_up
+			&& matches!(
+				layout.current().roles.get(&adv.id),
+				Some(NodeRoleV(Some(_)))
+			)
+	});
 	let failure_case_2 = layout
+		.current()
 		.roles
 		.items()
 		.iter()
@@ -115,7 +120,7 @@ pub async fn cmd_status(rpc_cli: &Endpoint<SystemRpc, ()>, rpc_host: NodeID) ->
 		let mut failed_nodes =
 			vec!["ID\tHostname\tAddress\tTags\tZone\tCapacity\tLast seen".to_string()];
 		for adv in status.iter().filter(|adv| !adv.is_up) {
-			if let Some(NodeRoleV(Some(cfg))) = layout.roles.get(&adv.id) {
+			if let Some(NodeRoleV(Some(cfg))) = layout.current().roles.get(&adv.id) {
 				let tf = timeago::Formatter::new();
 				failed_nodes.push(format!(
 					"{id:?}\t{host}\t{addr}\t[{tags}]\t{zone}\t{capacity}\t{last_seen}",
@@ -132,7 +137,7 @@ pub async fn cmd_status(rpc_cli: &Endpoint<SystemRpc, ()>, rpc_host: NodeID) ->
 				));
 			}
 		}
-		for (id, _, role_v) in layout.roles.items().iter() {
+		for (id, _, role_v) in layout.current().roles.items().iter() {
 			if let NodeRoleV(Some(cfg)) = role_v {
 				if !status_keys.contains(id) {
 					failed_nodes.push(format!(
diff --git a/src/garage/cli/layout.rs b/src/garage/cli/layout.rs
index ce2b11e0..4a617337 100644
--- a/src/garage/cli/layout.rs
+++ b/src/garage/cli/layout.rs
@@ -58,17 +58,18 @@ pub async fn cmd_assign_role(
 				status
 					.iter()
 					.map(|adv| adv.id)
-					.chain(layout.node_ids().iter().cloned()),
+					.chain(layout.current().node_ids().iter().cloned()),
 				node_id,
 			)
 		})
 		.collect::<Result<Vec<_>, _>>()?;
 
-	let mut roles = layout.roles.clone();
+	let mut roles = layout.current().roles.clone();
 	roles.merge(&layout.staging_roles);
 
 	for replaced in args.replace.iter() {
-		let replaced_node = find_matching_node(layout.node_ids().iter().cloned(), replaced)?;
+		let replaced_node =
+			find_matching_node(layout.current().node_ids().iter().cloned(), replaced)?;
 		match roles.get(&replaced_node) {
 			Some(NodeRoleV(Some(_))) => {
 				layout
@@ -149,7 +150,7 @@ pub async fn cmd_remove_role(
 ) -> Result<(), Error> {
 	let mut layout = fetch_layout(rpc_cli, rpc_host).await?;
 
-	let mut roles = layout.roles.clone();
+	let mut roles = layout.current().roles.clone();
 	roles.merge(&layout.staging_roles);
 
 	let deleted_node =
@@ -174,13 +175,16 @@ pub async fn cmd_show_layout(
 	let layout = fetch_layout(rpc_cli, rpc_host).await?;
 
 	println!("==== CURRENT CLUSTER LAYOUT ====");
-	print_cluster_layout(&layout, "No nodes currently have a role in the cluster.\nSee `garage status` to view available nodes.");
+	print_cluster_layout(layout.current(), "No nodes currently have a role in the cluster.\nSee `garage status` to view available nodes.");
 	println!();
-	println!("Current cluster layout version: {}", layout.version);
+	println!(
+		"Current cluster layout version: {}",
+		layout.current().version
+	);
 
 	let has_role_changes = print_staging_role_changes(&layout);
 	if has_role_changes {
-		let v = layout.version;
+		let v = layout.current().version;
 		let res_apply = layout.apply_staged_changes(Some(v + 1));
 
 		// this will print the stats of what partitions
@@ -189,7 +193,7 @@ pub async fn cmd_show_layout(
 			Ok((layout, msg)) => {
 				println!();
 				println!("==== NEW CLUSTER LAYOUT AFTER APPLYING CHANGES ====");
-				print_cluster_layout(&layout, "No nodes have a role in the new layout.");
+				print_cluster_layout(layout.current(), "No nodes have a role in the new layout.");
 				println!();
 
 				for line in msg.iter() {
@@ -266,11 +270,11 @@ pub async fn cmd_config_layout(
 				.parse::<ZoneRedundancy>()
 				.ok_or_message("invalid zone redundancy value")?;
 			if let ZoneRedundancy::AtLeast(r_int) = r {
-				if r_int > layout.replication_factor {
+				if r_int > layout.current().replication_factor {
 					return Err(Error::Message(format!(
 						"The zone redundancy must be smaller or equal to the \
                     replication factor ({}).",
-						layout.replication_factor
+						layout.current().replication_factor
 					)));
 				} else if r_int < 1 {
 					return Err(Error::Message(
@@ -302,7 +306,7 @@ pub async fn cmd_config_layout(
 pub async fn fetch_layout(
 	rpc_cli: &Endpoint<SystemRpc, ()>,
 	rpc_host: NodeID,
-) -> Result<ClusterLayout, Error> {
+) -> Result<LayoutHistory, Error> {
 	match rpc_cli
 		.call(&rpc_host, SystemRpc::PullClusterLayout, PRIO_NORMAL)
 		.await??
@@ -315,7 +319,7 @@ pub async fn fetch_layout(
 pub async fn send_layout(
 	rpc_cli: &Endpoint<SystemRpc, ()>,
 	rpc_host: NodeID,
-	layout: ClusterLayout,
+	layout: LayoutHistory,
 ) -> Result<(), Error> {
 	rpc_cli
 		.call(
@@ -327,7 +331,7 @@ pub async fn send_layout(
 	Ok(())
 }
 
-pub fn print_cluster_layout(layout: &ClusterLayout, empty_msg: &str) {
+pub fn print_cluster_layout(layout: &LayoutVersion, empty_msg: &str) {
 	let mut table = vec!["ID\tTags\tZone\tCapacity\tUsable capacity".to_string()];
 	for (id, _, role) in layout.roles.items().iter() {
 		let role = match &role.0 {
@@ -366,13 +370,13 @@ pub fn print_cluster_layout(layout: &ClusterLayout, empty_msg: &str) {
 	}
 }
 
-pub fn print_staging_role_changes(layout: &ClusterLayout) -> bool {
+pub fn print_staging_role_changes(layout: &LayoutHistory) -> bool {
 	let has_role_changes = layout
 		.staging_roles
 		.items()
 		.iter()
-		.any(|(k, _, v)| layout.roles.get(k) != Some(v));
-	let has_layout_changes = *layout.staging_parameters.get() != layout.parameters;
+		.any(|(k, _, v)| layout.current().roles.get(k) != Some(v));
+	let has_layout_changes = *layout.staging_parameters.get() != layout.current().parameters;
 
 	if has_role_changes || has_layout_changes {
 		println!();
@@ -380,7 +384,7 @@ pub fn print_staging_role_changes(layout: &ClusterLayout) -> bool {
 		if has_role_changes {
 			let mut table = vec!["ID\tTags\tZone\tCapacity".to_string()];
 			for (id, _, role) in layout.staging_roles.items().iter() {
-				if layout.roles.get(id) == Some(role) {
+				if layout.current().roles.get(id) == Some(role) {
 					continue;
 				}
 				if let Some(role) = &role.0 {