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Improve bootstraping: do it regularly; persist peer list

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This commit is contained in:
Alex Auvolat 2021-04-05 19:55:53 +02:00
parent 3a449badb1
commit 9ced9f78dc
No known key found for this signature in database
GPG Key ID: EDABF9711E244EB1
12 changed files with 226 additions and 80 deletions
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1
.drone.yml
View File

@ -37,6 +37,7 @@ steps:
- apt-get update
- apt-get install --yes libsodium-dev
- pwd
- cargo fmt -- --check
- cargo build
- name: cargo-test

2
Makefile
View File

@ -2,7 +2,7 @@ BIN=target/release/garage
DOCKER=lxpz/garage_amd64
all:
clear; RUSTFLAGS="-C link-arg=-fuse-ld=lld -C target-cpu=x86-64 -C target-feature=+sse2" cargo build --no-default-features
clear; cargo build
$(BIN):
RUSTFLAGS="-C link-arg=-fuse-ld=lld -C target-cpu=x86-64 -C target-feature=+sse2" cargo build --release --no-default-features

4
src/garage/admin_rpc.rs
View File

@ -246,15 +246,13 @@ impl AdminRpcHandler {
)))
}
KeyOperation::Import(query) => {
let prev_key = self.garage.key_table.get(&EmptyKey, &query.key_id)
.await?;
let prev_key = self.garage.key_table.get(&EmptyKey, &query.key_id).await?;
if prev_key.is_some() {
return Err(Error::Message(format!("Key {} already exists in data store. Even if it is deleted, we can't let you create a new key with the same ID. Sorry.", query.key_id)));
}
let imported_key = Key::import(&query.key_id, &query.secret_key, &query.name);
self.garage.key_table.insert(&imported_key).await?;
Ok(AdminRPC::KeyInfo(imported_key))
}
}
}

12
src/garage/cli.rs
View File

@ -5,8 +5,8 @@ use std::path::PathBuf;
use serde::{Deserialize, Serialize};
use structopt::StructOpt;
use garage_util::error::Error;
use garage_util::data::UUID;
use garage_util::error::Error;
use garage_util::time::*;
use garage_rpc::membership::*;
@ -384,7 +384,10 @@ pub async fn cmd_status(
Ok(())
}
pub fn find_matching_node(cand: impl std::iter::Iterator<Item=UUID>, pattern: &str) -> Result<UUID, Error> {
pub fn find_matching_node(
cand: impl std::iter::Iterator<Item = UUID>,
pattern: &str,
) -> Result<UUID, Error> {
let mut candidates = vec![];
for c in cand {
if hex::encode(&c).starts_with(&pattern) {
@ -428,7 +431,10 @@ pub async fn cmd_configure(
for replaced in args.replace.iter() {
let replaced_node = find_matching_node(config.members.keys().cloned(), replaced)?;
if config.members.remove(&replaced_node).is_none() {
return Err(Error::Message(format!("Cannot replace node {:?} as it is not in current configuration", replaced_node)));
return Err(Error::Message(format!(
"Cannot replace node {:?} as it is not in current configuration",
replaced_node
)));
}
}

2
src/garage/server.rs
View File

@ -52,7 +52,7 @@ pub async fn run_server(config_file: PathBuf) -> Result<(), Error> {
info!("Initializing Garage main data store...");
let garage = Garage::new(config.clone(), db, background, &mut rpc_server);
let bootstrap = garage.system.clone().bootstrap(
&config.bootstrap_peers[..],
config.bootstrap_peers,
config.consul_host,
config.consul_service_name,
);

4
src/model/object_table.rs
View File

@ -147,7 +147,9 @@ impl Entry<String, String> for Object {
&self.key
}
fn is_tombstone(&self) -> bool {
self.versions.len() == 1 && self.versions[0].state == ObjectVersionState::Complete(ObjectVersionData::DeleteMarker)
self.versions.len() == 1
&& self.versions[0].state
== ObjectVersionState::Complete(ObjectVersionData::DeleteMarker)
}
}

180
src/rpc/membership.rs
View File

@ -11,13 +11,13 @@ use futures::future::join_all;
use futures::select;
use futures_util::future::*;
use serde::{Deserialize, Serialize};
use tokio::io::AsyncWriteExt;
use tokio::sync::watch;
use tokio::sync::Mutex;
use garage_util::background::BackgroundRunner;
use garage_util::data::*;
use garage_util::error::Error;
use garage_util::persister::Persister;
use garage_util::time::*;
use crate::consul::get_consul_nodes;
@ -26,7 +26,7 @@ use crate::rpc_client::*;
use crate::rpc_server::*;
const PING_INTERVAL: Duration = Duration::from_secs(10);
const CONSUL_INTERVAL: Duration = Duration::from_secs(60);
const DISCOVERY_INTERVAL: Duration = Duration::from_secs(60);
const PING_TIMEOUT: Duration = Duration::from_secs(2);
const MAX_FAILURES_BEFORE_CONSIDERED_DOWN: usize = 5;
@ -69,7 +69,8 @@ pub struct AdvertisedNode {
pub struct System {
pub id: UUID,
metadata_dir: PathBuf,
persist_config: Persister<NetworkConfig>,
persist_status: Persister<Vec<AdvertisedNode>>,
rpc_local_port: u16,
state_info: StateInfo,
@ -80,11 +81,16 @@ pub struct System {
pub(crate) status: watch::Receiver<Arc<Status>>,
pub ring: watch::Receiver<Arc<Ring>>,
update_lock: Mutex<(watch::Sender<Arc<Status>>, watch::Sender<Arc<Ring>>)>,
update_lock: Mutex<Updaters>,
pub background: Arc<BackgroundRunner>,
}
struct Updaters {
update_status: watch::Sender<Arc<Status>>,
update_ring: watch::Sender<Arc<Ring>>,
}
#[derive(Debug, Clone)]
pub struct Status {
pub nodes: HashMap<UUID, Arc<StatusEntry>>,
@ -144,6 +150,25 @@ impl Status {
debug!("END --");
self.hash = blake2sum(nodes_txt.as_bytes());
}
fn to_serializable_membership(&self, system: &System) -> Vec<AdvertisedNode> {
let mut mem = vec![];
for (node, status) in self.nodes.iter() {
let state_info = if *node == system.id {
system.state_info.clone()
} else {
status.state_info.clone()
};
mem.push(AdvertisedNode {
id: *node,
addr: status.addr,
is_up: status.is_up(),
last_seen: status.last_seen,
state_info,
});
}
mem
}
}
fn gen_node_id(metadata_dir: &PathBuf) -> Result<UUID, Error> {
@ -169,23 +194,6 @@ fn gen_node_id(metadata_dir: &PathBuf) -> Result<UUID, Error> {
}
}
fn read_network_config(metadata_dir: &PathBuf) -> Result<NetworkConfig, Error> {
let mut path = metadata_dir.clone();
path.push("network_config");
let mut file = std::fs::OpenOptions::new()
.read(true)
.open(path.as_path())?;
let mut net_config_bytes = vec![];
file.read_to_end(&mut net_config_bytes)?;
let net_config = rmp_serde::decode::from_read_ref(&net_config_bytes[..])
.expect("Unable to parse network configuration file (has version format changed?).");
Ok(net_config)
}
impl System {
pub fn new(
metadata_dir: PathBuf,
@ -196,7 +204,10 @@ impl System {
let id = gen_node_id(&metadata_dir).expect("Unable to read or generate node ID");
info!("Node ID: {}", hex::encode(&id));
let net_config = match read_network_config(&metadata_dir) {
let persist_config = Persister::new(&metadata_dir, "network_config");
let persist_status = Persister::new(&metadata_dir, "peer_info");
let net_config = match persist_config.load() {
Ok(x) => x,
Err(e) => {
info!(
@ -206,6 +217,7 @@ impl System {
NetworkConfig::new()
}
};
let mut status = Status {
nodes: HashMap::new(),
hash: Hash::default(),
@ -231,14 +243,18 @@ impl System {
let sys = Arc::new(System {
id,
metadata_dir,
persist_config,
persist_status,
rpc_local_port: rpc_server.bind_addr.port(),
state_info,
rpc_http_client,
rpc_client,
status,
ring,
update_lock: Mutex::new((update_status, update_ring)),
update_lock: Mutex::new(Updaters {
update_status,
update_ring,
}),
background,
});
sys.clone().register_handler(rpc_server, rpc_path);
@ -272,14 +288,11 @@ impl System {
}
async fn save_network_config(self: Arc<Self>) -> Result<(), Error> {
let mut path = self.metadata_dir.clone();
path.push("network_config");
let ring = self.ring.borrow().clone();
let data = rmp_to_vec_all_named(&ring.config)?;
let mut f = tokio::fs::File::create(path.as_path()).await?;
f.write_all(&data[..]).await?;
self.persist_config
.save_async(&ring.config)
.await
.expect("Cannot save current cluster configuration");
Ok(())
}
@ -308,12 +321,15 @@ impl System {
pub async fn bootstrap(
self: Arc<Self>,
peers: &[SocketAddr],
peers: Vec<SocketAddr>,
consul_host: Option<String>,
consul_service_name: Option<String>,
) {
let bootstrap_peers = peers.iter().map(|ip| (*ip, None)).collect::<Vec<_>>();
self.clone().ping_nodes(bootstrap_peers).await;
let self2 = self.clone();
self.background
.spawn_worker(format!("discovery loop"), |stop_signal| {
self2.discovery_loop(peers, stop_signal)
});
let self2 = self.clone();
self.background
@ -394,9 +410,7 @@ impl System {
if has_changes {
status.recalculate_hash();
}
if let Err(e) = update_locked.0.send(Arc::new(status)) {
error!("In ping_nodes: could not save status update ({})", e);
}
self.update_status(&update_locked, status);
drop(update_locked);
if to_advertise.len() > 0 {
@ -420,7 +434,7 @@ impl System {
let status_hash = status.hash;
let config_version = self.ring.borrow().config.version;
update_locked.0.send(Arc::new(status))?;
self.update_status(&update_locked, status);
drop(update_locked);
if is_new || status_hash != ping.status_hash {
@ -436,23 +450,9 @@ impl System {
}
fn handle_pull_status(&self) -> Result<Message, Error> {
let status = self.status.borrow().clone();
let mut mem = vec![];
for (node, status) in status.nodes.iter() {
let state_info = if *node == self.id {
self.state_info.clone()
} else {
status.state_info.clone()
};
mem.push(AdvertisedNode {
id: *node,
addr: status.addr,
is_up: status.is_up(),
last_seen: status.last_seen,
state_info,
});
}
Ok(Message::AdvertiseNodesUp(mem))
Ok(Message::AdvertiseNodesUp(
self.status.borrow().to_serializable_membership(self),
))
}
fn handle_pull_config(&self) -> Result<Message, Error> {
@ -502,7 +502,7 @@ impl System {
if has_changed {
status.recalculate_hash();
}
update_lock.0.send(Arc::new(status))?;
self.update_status(&update_lock, status);
drop(update_lock);
if to_ping.len() > 0 {
@ -522,7 +522,7 @@ impl System {
if adv.version > ring.config.version {
let ring = Ring::new(adv.clone());
update_lock.1.send(Arc::new(ring))?;
update_lock.update_ring.send(Arc::new(ring))?;
drop(update_lock);
self.background.spawn_cancellable(
@ -530,6 +530,7 @@ impl System {
.broadcast(Message::AdvertiseConfig(adv.clone()), PING_TIMEOUT)
.map(Ok),
);
self.background.spawn(self.clone().save_network_config());
}
@ -537,7 +538,7 @@ impl System {
}
async fn ping_loop(self: Arc<Self>, mut stop_signal: watch::Receiver<bool>) {
loop {
while !*stop_signal.borrow() {
let restart_at = tokio::time::sleep(PING_INTERVAL);
let status = self.status.borrow().clone();
@ -552,11 +553,49 @@ impl System {
select! {
_ = restart_at.fuse() => (),
_ = stop_signal.changed().fuse() => {
if *stop_signal.borrow() {
return;
_ = stop_signal.changed().fuse() => (),
}
}
}
async fn discovery_loop(
self: Arc<Self>,
bootstrap_peers: Vec<SocketAddr>,
mut stop_signal: watch::Receiver<bool>,
) {
while !*stop_signal.borrow() {
let not_configured = self.ring.borrow().config.members.len() == 0;
let no_peers = self.status.borrow().nodes.len() < 3;
let bad_peers = self
.status
.borrow()
.nodes
.iter()
.filter(|(_, v)| !v.is_up())
.count() != self.ring.borrow().config.members.len();
if not_configured || no_peers || bad_peers {
info!("Doing a bootstrap/discovery step (not_configured: {}, no_peers: {}, bad_peers: {})", not_configured, no_peers, bad_peers);
let mut bp2 = bootstrap_peers
.iter()
.map(|ip| (*ip, None))
.collect::<Vec<_>>();
match self.persist_status.load() {
Ok(peers) => {
bp2.extend(peers.iter().map(|x| (x.addr, Some(x.id))));
}
_ => (),
}
self.clone().ping_nodes(bp2).await;
}
let restart_at = tokio::time::sleep(DISCOVERY_INTERVAL);
select! {
_ = restart_at.fuse() => (),
_ = stop_signal.changed().fuse() => (),
}
}
}
@ -568,8 +607,6 @@ impl System {
consul_service_name: String,
) {
while !*stop_signal.borrow() {
let restart_at = tokio::time::sleep(CONSUL_INTERVAL);
match get_consul_nodes(&consul_host, &consul_service_name).await {
Ok(mut node_list) => {
let ping_addrs = node_list.drain(..).map(|a| (a, None)).collect::<Vec<_>>();
@ -580,6 +617,7 @@ impl System {
}
}
let restart_at = tokio::time::sleep(DISCOVERY_INTERVAL);
select! {
_ = restart_at.fuse() => (),
_ = stop_signal.changed().fuse() => (),
@ -611,4 +649,20 @@ impl System {
let _: Result<_, _> = self.handle_advertise_config(&config).await;
}
}
fn update_status(self: &Arc<Self>, updaters: &Updaters, status: Status) {
let status = Arc::new(status);
updaters
.update_status
.send(status.clone())
.expect("Could not update internal membership status");
self.background
.spawn_cancellable(self.clone().persist_status(status));
}
async fn persist_status(self: Arc<Self>, status: Arc<Status>) -> Result<(), Error> {
let serializable_status = status.to_serializable_membership(&self);
self.persist_status.save_async(&serializable_status).await?;
Ok(())
}
}

8
src/table/data.rs
View File

@ -35,7 +35,13 @@ where
F: TableSchema,
R: TableReplication,
{
pub fn new(system: Arc<System>, name: String, instance: F, replication: R, db: &sled::Db) -> Arc<Self> {
pub fn new(
system: Arc<System>,
name: String,
instance: F,
replication: R,
db: &sled::Db,
) -> Arc<Self> {
let store = db
.open_tree(&format!("{}:table", name))
.expect("Unable to open DB tree");

7
src/table/gc.rs
View File

@ -157,7 +157,12 @@ where
if errs.is_empty() {
Ok(true)
} else {
Err(Error::Message(errs.into_iter().map(|x| format!("{}", x)).collect::<Vec<_>>().join(", ")))
Err(Error::Message(
errs.into_iter()
.map(|x| format!("{}", x))
.collect::<Vec<_>>()
.join(", "),
))
}
}

23
src/table/merkle.rs
View File

@ -200,12 +200,13 @@ where
let subnode = self.read_node_txn(tx, &key_sub)?;
match subnode {
MerkleNode::Empty => {
warn!("({}) Single subnode in tree is empty Merkle node", self.data.name);
warn!(
"({}) Single subnode in tree is empty Merkle node",
self.data.name
);
Some(MerkleNode::Empty)
}
MerkleNode::Intermediate(_) => {
Some(MerkleNode::Intermediate(children))
}
MerkleNode::Intermediate(_) => Some(MerkleNode::Intermediate(children)),
x @ MerkleNode::Leaf(_, _) => {
tx.remove(key_sub.encode())?;
Some(x)
@ -239,14 +240,24 @@ where
{
let exlf_subkey = key.next_key(&exlf_khash);
let exlf_sub_hash = self.update_item_rec(tx, &exlf_k[..], &exlf_khash, &exlf_subkey, Some(exlf_vhash))?.unwrap();
let exlf_sub_hash = self
.update_item_rec(
tx,
&exlf_k[..],
&exlf_khash,
&exlf_subkey,
Some(exlf_vhash),
)?
.unwrap();
intermediate_set_child(&mut int, exlf_subkey.prefix[i], exlf_sub_hash);
assert_eq!(int.len(), 1);
}
{
let key2 = key.next_key(khash);
let subhash = self.update_item_rec(tx, k, khash, &key2, new_vhash)?.unwrap();
let subhash = self
.update_item_rec(tx, k, khash, &key2, new_vhash)?
.unwrap();
intermediate_set_child(&mut int, key2.prefix[i], subhash);
if exlf_khash.as_slice()[i] == khash.as_slice()[i] {
assert_eq!(int.len(), 1);

1
src/util/lib.rs
View File

@ -5,4 +5,5 @@ pub mod background;
pub mod config;
pub mod data;
pub mod error;
pub mod persister;
pub mod time;

62
src/util/persister.rs Normal file
View File

@ -0,0 +1,62 @@
use std::io::{Read, Write};
use std::path::PathBuf;
use tokio::io::AsyncWriteExt;
use serde::{Deserialize, Serialize};
use crate::data::*;
use crate::error::Error;
pub struct Persister<T: Serialize + for<'de> Deserialize<'de>> {
path: PathBuf,
_marker: std::marker::PhantomData<T>,
}
impl<T> Persister<T>
where
T: Serialize + for<'de> Deserialize<'de>,
{
pub fn new(base_dir: &PathBuf, file_name: &str) -> Self {
let mut path = base_dir.clone();
path.push(file_name);
Self {
path,
_marker: Default::default(),
}
}
pub fn load(&self) -> Result<T, Error> {
let mut file = std::fs::OpenOptions::new().read(true).open(&self.path)?;
let mut bytes = vec![];
file.read_to_end(&mut bytes)?;
let value = rmp_serde::decode::from_read_ref(&bytes[..])?;
Ok(value)
}
pub fn save(&self, t: &T) -> Result<(), Error> {
let bytes = rmp_to_vec_all_named(t)?;
let mut file = std::fs::OpenOptions::new()
.write(true)
.create(true)
.truncate(true)
.open(&self.path)?;
file.write_all(&bytes[..])?;
Ok(())
}
pub async fn save_async(&self, t: &T) -> Result<(), Error> {
let bytes = rmp_to_vec_all_named(t)?;
let mut file = tokio::fs::File::create(&self.path).await?;
file.write_all(&bytes[..]).await?;
Ok(())
}
}