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layout: refactor to use a RwLock on LayoutHistory

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This commit is contained in:
Alex Auvolat 2023-11-09 14:12:05 +01:00
parent 19ef1ec8e7
commit bfb1845fdc
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GPG key ID: 0E496D15096376BE
8 changed files with 82 additions and 92 deletions
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6
src/api/admin/cluster.rs
View file

@ -210,7 +210,7 @@ pub async fn handle_update_cluster_layout(
) -> Result<Response<Body>, Error> {
let updates = parse_json_body::<UpdateClusterLayoutRequest>(req).await?;
let mut layout = garage.system.cluster_layout().as_ref().clone();
let mut layout = garage.system.cluster_layout().clone();
let mut roles = layout.current().roles.clone();
roles.merge(&layout.staging.get().roles);
@ -256,7 +256,7 @@ pub async fn handle_apply_cluster_layout(
) -> Result<Response<Body>, Error> {
let param = parse_json_body::<ApplyLayoutRequest>(req).await?;
let layout = garage.system.cluster_layout().as_ref().clone();
let layout = garage.system.cluster_layout().clone();
let (layout, msg) = layout.apply_staged_changes(Some(param.version))?;
garage
@ -273,7 +273,7 @@ pub async fn handle_apply_cluster_layout(
}
pub async fn handle_revert_cluster_layout(garage: &Arc<Garage>) -> Result<Response<Body>, Error> {
let layout = garage.system.cluster_layout().as_ref().clone();
let layout = garage.system.cluster_layout().clone();
let layout = layout.revert_staged_changes()?;
garage
.system

11
src/api/k2v/index.rs
View file

@ -5,7 +5,6 @@ use serde::Serialize;
use garage_util::data::*;
use garage_rpc::layout::LayoutHistory;
use garage_table::util::*;
use garage_model::garage::Garage;
@ -26,7 +25,8 @@ pub async fn handle_read_index(
) -> Result<Response<Body>, Error> {
let reverse = reverse.unwrap_or(false);
let layout: Arc<LayoutHistory> = garage.system.cluster_layout().clone();
// TODO: not only current
let node_id_vec = garage.system.cluster_layout().current().node_ids().to_vec();
let (partition_keys, more, next_start) = read_range(
&garage.k2v.counter_table.table,
@ -35,10 +35,7 @@ pub async fn handle_read_index(
&start,
&end,
limit,
Some((
DeletedFilter::NotDeleted,
layout.current().node_id_vec.clone(),
)),
Some((DeletedFilter::NotDeleted, node_id_vec)),
EnumerationOrder::from_reverse(reverse),
)
.await?;
@ -57,7 +54,7 @@ pub async fn handle_read_index(
partition_keys: partition_keys
.into_iter()
.map(|part| {
let vals = part.filtered_values(&layout);
let vals = part.filtered_values(&garage.system.cluster_layout());
ReadIndexResponseEntry {
pk: part.sk,
entries: *vals.get(&s_entries).unwrap_or(&0),

6
src/garage/cli/layout.rs
View file

@ -1,5 +1,3 @@
use std::sync::Arc;
use bytesize::ByteSize;
use format_table::format_table;
@ -323,7 +321,7 @@ pub async fn fetch_layout(
.call(&rpc_host, SystemRpc::PullClusterLayout, PRIO_NORMAL)
.await??
{
SystemRpc::AdvertiseClusterLayout(t) => Ok(Arc::try_unwrap(t).unwrap()),
SystemRpc::AdvertiseClusterLayout(t) => Ok(t),
resp => Err(Error::Message(format!("Invalid RPC response: {:?}", resp))),
}
}
@ -336,7 +334,7 @@ pub async fn send_layout(
rpc_cli
.call(
&rpc_host,
SystemRpc::AdvertiseClusterLayout(Arc::new(layout)),
SystemRpc::AdvertiseClusterLayout(layout),
PRIO_NORMAL,
)
.await??;

11
src/model/helper/bucket.rs
View file

@ -450,10 +450,8 @@ impl<'a> BucketHelper<'a> {
#[cfg(feature = "k2v")]
{
use garage_rpc::layout::LayoutHistory;
use std::sync::Arc;
let layout: Arc<LayoutHistory> = self.0.system.cluster_layout().clone();
// TODO: not only current
let node_id_vec = self.0.system.cluster_layout().current().node_ids().to_vec();
let k2vindexes = self
.0
.k2v
@ -462,10 +460,7 @@ impl<'a> BucketHelper<'a> {
.get_range(
&bucket_id,
None,
Some((
DeletedFilter::NotDeleted,
layout.current().node_id_vec.clone(),
)),
Some((DeletedFilter::NotDeleted, node_id_vec)),
10,
EnumerationOrder::Forward,
)

93
src/rpc/layout/manager.rs
View file

@ -1,10 +1,9 @@
use std::sync::Arc;
use std::sync::{Arc, RwLock, RwLockReadGuard};
use std::time::Duration;
use serde::{Deserialize, Serialize};
use tokio::sync::watch;
use tokio::sync::Mutex;
use tokio::sync::Notify;
use netapp::endpoint::Endpoint;
use netapp::peering::fullmesh::FullMeshPeeringStrategy;
@ -23,8 +22,8 @@ pub struct LayoutManager {
replication_factor: usize,
persist_cluster_layout: Persister<LayoutHistory>,
pub layout_watch: watch::Receiver<Arc<LayoutHistory>>,
update_layout: Mutex<watch::Sender<Arc<LayoutHistory>>>,
layout: Arc<RwLock<LayoutHistory>>,
pub(crate) change_notify: Arc<Notify>,
pub(crate) rpc_helper: RpcHelper,
system_endpoint: Arc<Endpoint<SystemRpc, System>>,
@ -71,20 +70,21 @@ impl LayoutManager {
}
};
let (update_layout, layout_watch) = watch::channel(Arc::new(cluster_layout));
let layout = Arc::new(RwLock::new(cluster_layout));
let change_notify = Arc::new(Notify::new());
let rpc_helper = RpcHelper::new(
node_id.into(),
fullmesh,
layout_watch.clone(),
layout.clone(),
config.rpc_timeout_msec.map(Duration::from_millis),
);
Ok(Arc::new(Self {
replication_factor,
persist_cluster_layout,
layout_watch,
update_layout: Mutex::new(update_layout),
layout,
change_notify,
system_endpoint,
rpc_helper,
}))
@ -108,8 +108,8 @@ impl LayoutManager {
Ok(())
}
pub fn layout(&self) -> watch::Ref<Arc<LayoutHistory>> {
self.layout_watch.borrow()
pub fn layout(&self) -> RwLockReadGuard<'_, LayoutHistory> {
self.layout.read().unwrap()
}
pub(crate) async fn pull_cluster_layout(self: &Arc<Self>, peer: Uuid) {
@ -131,7 +131,7 @@ impl LayoutManager {
/// Save network configuration to disc
async fn save_cluster_layout(&self) -> Result<(), Error> {
let layout: Arc<LayoutHistory> = self.layout_watch.borrow().clone();
let layout = self.layout.read().unwrap().clone(); // TODO: avoid cloning
self.persist_cluster_layout
.save_async(&layout)
.await
@ -139,6 +139,22 @@ impl LayoutManager {
Ok(())
}
fn merge_layout(&self, adv: &LayoutHistory) -> Option<LayoutHistory> {
let mut layout = self.layout.write().unwrap();
let prev_layout_check = layout.check().is_ok();
if !prev_layout_check || adv.check().is_ok() {
if layout.merge(adv) {
if prev_layout_check && layout.check().is_err() {
panic!("Merged two correct layouts and got an incorrect layout.");
}
return Some(layout.clone());
}
}
None
}
// ---- RPC HANDLERS ----
pub(crate) fn handle_advertise_status(self: &Arc<Self>, from: Uuid, status: &LayoutStatus) {
@ -154,7 +170,7 @@ impl LayoutManager {
}
pub(crate) fn handle_pull_cluster_layout(&self) -> SystemRpc {
let layout = self.layout_watch.borrow().clone();
let layout = self.layout.read().unwrap().clone(); // TODO: avoid cloning
SystemRpc::AdvertiseClusterLayout(layout)
}
@ -172,42 +188,27 @@ impl LayoutManager {
return Err(Error::Message(msg));
}
if *adv != **self.layout_watch.borrow() {
let update_layout = self.update_layout.lock().await;
let mut layout: LayoutHistory = self.layout_watch.borrow().as_ref().clone();
if let Some(new_layout) = self.merge_layout(adv) {
self.change_notify.notify_waiters();
let prev_layout_check = layout.check().is_ok();
if layout.merge(adv) {
if prev_layout_check && layout.check().is_err() {
error!("New cluster layout is invalid, discarding.");
return Err(Error::Message(
"New cluster layout is invalid, discarding.".into(),
));
}
let layout = Arc::new(layout);
update_layout.send(layout.clone())?;
drop(update_layout); // release mutex
tokio::spawn({
let this = self.clone();
async move {
if let Err(e) = this
.rpc_helper
.broadcast(
&this.system_endpoint,
SystemRpc::AdvertiseClusterLayout(layout),
RequestStrategy::with_priority(PRIO_HIGH),
)
.await
{
warn!("Error while broadcasting new cluster layout: {}", e);
}
tokio::spawn({
let this = self.clone();
async move {
if let Err(e) = this
.rpc_helper
.broadcast(
&this.system_endpoint,
SystemRpc::AdvertiseClusterLayout(new_layout),
RequestStrategy::with_priority(PRIO_HIGH),
)
.await
{
warn!("Error while broadcasting new cluster layout: {}", e);
}
});
}
});
self.save_cluster_layout().await?;
}
self.save_cluster_layout().await?;
}
Ok(SystemRpc::Ok)

11
src/rpc/rpc_helper.rs
View file

@ -1,12 +1,11 @@
//! Contain structs related to making RPCs
use std::sync::Arc;
use std::sync::{Arc, RwLock};
use std::time::Duration;
use futures::future::join_all;
use futures::stream::futures_unordered::FuturesUnordered;
use futures::stream::StreamExt;
use tokio::select;
use tokio::sync::watch;
use opentelemetry::KeyValue;
use opentelemetry::{
@ -91,7 +90,7 @@ pub struct RpcHelper(Arc<RpcHelperInner>);
struct RpcHelperInner {
our_node_id: Uuid,
fullmesh: Arc<FullMeshPeeringStrategy>,
layout_watch: watch::Receiver<Arc<LayoutHistory>>,
layout: Arc<RwLock<LayoutHistory>>,
metrics: RpcMetrics,
rpc_timeout: Duration,
}
@ -100,7 +99,7 @@ impl RpcHelper {
pub(crate) fn new(
our_node_id: Uuid,
fullmesh: Arc<FullMeshPeeringStrategy>,
layout_watch: watch::Receiver<Arc<LayoutHistory>>,
layout: Arc<RwLock<LayoutHistory>>,
rpc_timeout: Option<Duration>,
) -> Self {
let metrics = RpcMetrics::new();
@ -108,7 +107,7 @@ impl RpcHelper {
Self(Arc::new(RpcHelperInner {
our_node_id,
fullmesh,
layout_watch,
layout,
metrics,
rpc_timeout: rpc_timeout.unwrap_or(DEFAULT_TIMEOUT),
}))
@ -392,7 +391,7 @@ impl RpcHelper {
pub fn request_order(&self, nodes: &[Uuid]) -> Vec<Uuid> {
// Retrieve some status variables that we will use to sort requests
let peer_list = self.0.fullmesh.get_peer_list();
let layout: Arc<LayoutHistory> = self.0.layout_watch.borrow().clone();
let layout = self.0.layout.read().unwrap();
let our_zone = match layout.current().node_role(&self.0.our_node_id) {
Some(pc) => &pc.zone,
None => "",

15
src/rpc/system.rs
View file

@ -4,7 +4,7 @@ use std::io::{Read, Write};
use std::net::{IpAddr, SocketAddr};
use std::path::{Path, PathBuf};
use std::sync::atomic::Ordering;
use std::sync::{Arc, RwLock};
use std::sync::{Arc, RwLock, RwLockReadGuard};
use std::time::{Duration, Instant};
use arc_swap::ArcSwap;
@ -13,7 +13,7 @@ use futures::join;
use serde::{Deserialize, Serialize};
use sodiumoxide::crypto::sign::ed25519;
use tokio::select;
use tokio::sync::watch;
use tokio::sync::{watch, Notify};
use netapp::endpoint::{Endpoint, EndpointHandler};
use netapp::message::*;
@ -68,7 +68,7 @@ pub enum SystemRpc {
/// Ask other node its cluster layout. Answered with AdvertiseClusterLayout
PullClusterLayout,
/// Advertisement of cluster layout. Sent spontanously or in response to PullClusterLayout
AdvertiseClusterLayout(Arc<LayoutHistory>),
AdvertiseClusterLayout(LayoutHistory),
}
impl Rpc for SystemRpc {
@ -345,12 +345,12 @@ impl System {
// ---- Public utilities / accessors ----
pub fn cluster_layout(&self) -> watch::Ref<Arc<LayoutHistory>> {
pub fn cluster_layout(&self) -> RwLockReadGuard<'_, LayoutHistory> {
self.layout_manager.layout()
}
pub fn layout_watch(&self) -> watch::Receiver<Arc<LayoutHistory>> {
self.layout_manager.layout_watch.clone()
pub fn layout_notify(&self) -> Arc<Notify> {
self.layout_manager.change_notify.clone()
}
pub fn rpc_helper(&self) -> &RpcHelper {
@ -412,7 +412,6 @@ impl System {
}
pub fn health(&self) -> ClusterHealth {
let layout: Arc<_> = self.cluster_layout().clone();
let quorum = self.replication_mode.write_quorum();
let replication_factor = self.replication_factor;
@ -423,6 +422,8 @@ impl System {
.collect::<HashMap<Uuid, _>>();
let connected_nodes = nodes.iter().filter(|(_, n)| n.is_up).count();
let layout = self.cluster_layout(); // acquires a rwlock
// TODO: not only layout.current()
let storage_nodes = layout
.current()

21
src/table/sync.rs
View file

@ -10,7 +10,7 @@ use rand::Rng;
use serde::{Deserialize, Serialize};
use serde_bytes::ByteBuf;
use tokio::select;
use tokio::sync::{mpsc, watch};
use tokio::sync::{mpsc, watch, Notify};
use garage_util::background::*;
use garage_util::data::*;
@ -91,8 +91,8 @@ impl<F: TableSchema, R: TableReplication> TableSyncer<F, R> {
bg.spawn_worker(SyncWorker {
syncer: self.clone(),
layout_watch: self.system.layout_watch(),
layout: self.system.cluster_layout().clone(),
layout_notify: self.system.layout_notify(),
layout_version: self.system.cluster_layout().current().version,
add_full_sync_rx,
todo: vec![],
next_full_sync: Instant::now() + Duration::from_secs(20),
@ -492,8 +492,8 @@ impl<F: TableSchema, R: TableReplication> EndpointHandler<SyncRpc> for TableSync
struct SyncWorker<F: TableSchema, R: TableReplication> {
syncer: Arc<TableSyncer<F, R>>,
layout_watch: watch::Receiver<Arc<LayoutHistory>>,
layout: Arc<LayoutHistory>,
layout_notify: Arc<Notify>,
layout_version: u64,
add_full_sync_rx: mpsc::UnboundedReceiver<()>,
todo: Vec<TodoPartition>,
next_full_sync: Instant,
@ -593,12 +593,11 @@ impl<F: TableSchema, R: TableReplication> Worker for SyncWorker<F, R> {
self.add_full_sync();
}
},
_ = self.layout_watch.changed() => {
let new_layout = self.layout_watch.borrow();
if !Arc::ptr_eq(&new_layout, &self.layout) {
self.layout = new_layout.clone();
drop(new_layout);
debug!("({}) Ring changed, adding full sync to syncer todo list", F::TABLE_NAME);
_ = self.layout_notify.notified() => {
let new_version = self.syncer.system.cluster_layout().current().version;
if new_version > self.layout_version {
self.layout_version = new_version;
debug!("({}) Layout changed, adding full sync to syncer todo list", F::TABLE_NAME);
self.add_full_sync();
}
},