/
pd.rs
1199 lines (1053 loc) · 38.7 KB
/
pd.rs
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// Copyright 2016 TiKV Project Authors. Licensed under Apache-2.0.
use std::collections::BTreeMap;
use std::collections::Bound::{Excluded, Unbounded};
use std::sync::atomic::{AtomicUsize, Ordering};
use std::sync::{Arc, RwLock};
use std::time::{Duration, Instant};
use futures::future::{err, ok};
use futures::sync::mpsc::{self, UnboundedReceiver, UnboundedSender};
use futures::{Future, Stream};
use tokio_timer::timer::Handle;
use kvproto::metapb::{self, Region};
use kvproto::pdpb;
use raft::eraftpb;
use tikv::pd::{Error, Key, PdClient, PdFuture, RegionInfo, RegionStat, Result};
use tikv::raftstore::store::keys::{self, data_key, enc_end_key, enc_start_key};
use tikv::raftstore::store::util::check_key_in_region;
use tikv::raftstore::store::{INIT_EPOCH_CONF_VER, INIT_EPOCH_VER};
use tikv_util::collections::{HashMap, HashMapEntry, HashSet};
use tikv_util::timer::GLOBAL_TIMER_HANDLE;
use tikv_util::{Either, HandyRwLock};
use super::*;
struct Store {
store: metapb::Store,
region_ids: HashSet<u64>,
sender: UnboundedSender<pdpb::RegionHeartbeatResponse>,
receiver: Option<UnboundedReceiver<pdpb::RegionHeartbeatResponse>>,
}
impl Default for Store {
fn default() -> Store {
let (tx, rx) = mpsc::unbounded();
Store {
store: Default::default(),
region_ids: Default::default(),
sender: tx,
receiver: Some(rx),
}
}
}
#[derive(Debug, Clone, PartialEq)]
enum SchedulePolicy {
/// Repeat an Operator.
Repeat(isize),
/// Repeat till succcess.
TillSuccess,
/// Stop immediately.
Stop,
}
impl SchedulePolicy {
fn schedule(&mut self) -> bool {
match *self {
SchedulePolicy::Repeat(ref mut c) => {
if *c > 0 {
*c -= 1;
true
} else {
false
}
}
SchedulePolicy::TillSuccess => true,
SchedulePolicy::Stop => false,
}
}
}
#[derive(Clone, Debug)]
enum Operator {
AddPeer {
// Left: to be added.
// Right: pending peer.
peer: Either<metapb::Peer, metapb::Peer>,
policy: SchedulePolicy,
},
RemovePeer {
peer: metapb::Peer,
policy: SchedulePolicy,
},
TransferLeader {
peer: metapb::Peer,
policy: SchedulePolicy,
},
MergeRegion {
source_region_id: u64,
target_region_id: u64,
policy: Arc<RwLock<SchedulePolicy>>,
},
SplitRegion {
region_epoch: metapb::RegionEpoch,
policy: pdpb::CheckPolicy,
keys: Vec<Vec<u8>>,
},
}
impl Operator {
fn make_region_heartbeat_response(
&self,
region_id: u64,
cluster: &Cluster,
) -> pdpb::RegionHeartbeatResponse {
match *self {
Operator::AddPeer { ref peer, .. } => {
if let Either::Left(ref peer) = *peer {
let conf_change_type = if peer.get_is_learner() {
eraftpb::ConfChangeType::AddLearnerNode
} else {
eraftpb::ConfChangeType::AddNode
};
new_pd_change_peer(conf_change_type, peer.clone())
} else {
pdpb::RegionHeartbeatResponse::new()
}
}
Operator::RemovePeer { ref peer, .. } => {
new_pd_change_peer(eraftpb::ConfChangeType::RemoveNode, peer.clone())
}
Operator::TransferLeader { ref peer, .. } => new_pd_transfer_leader(peer.clone()),
Operator::MergeRegion {
target_region_id, ..
} => {
if target_region_id == region_id {
pdpb::RegionHeartbeatResponse::new()
} else {
let region = cluster
.get_region_by_id(target_region_id)
.unwrap()
.unwrap()
.clone();
new_pd_merge_region(region)
}
}
Operator::SplitRegion {
policy, ref keys, ..
} => new_split_region(policy, keys.clone()),
}
}
fn try_finished(
&mut self,
cluster: &Cluster,
region: &metapb::Region,
leader: &metapb::Peer,
) -> bool {
match *self {
Operator::AddPeer {
ref mut peer,
ref mut policy,
} => {
if !policy.schedule() {
return true;
}
let pr = peer.clone();
if let Either::Left(pr) = pr {
if region.get_peers().iter().any(|p| p == &pr) {
// TiKV is adding the peer right now,
// set it to Right so it will not be scheduled again.
*peer = Either::Right(pr);
} else {
// TiKV rejects AddNode.
return false;
}
}
if let Either::Right(ref pr) = *peer {
// Still adding peer?
return !cluster.pending_peers.contains_key(&pr.get_id());
}
unreachable!()
}
Operator::SplitRegion {
ref region_epoch, ..
} => region.get_region_epoch() != region_epoch,
Operator::RemovePeer {
ref peer,
ref mut policy,
} => region.get_peers().iter().all(|p| p != peer) || !policy.schedule(),
Operator::TransferLeader {
ref peer,
ref mut policy,
} => leader == peer || !policy.schedule(),
Operator::MergeRegion {
source_region_id,
ref mut policy,
..
} => {
if cluster
.get_region_by_id(source_region_id)
.unwrap()
.is_none()
{
*policy.write().unwrap() = SchedulePolicy::Stop;
false
} else {
!policy.write().unwrap().schedule()
}
}
}
}
}
struct Cluster {
meta: metapb::Cluster,
stores: HashMap<u64, Store>,
regions: BTreeMap<Key, metapb::Region>,
region_id_keys: HashMap<u64, Key>,
region_approximate_size: HashMap<u64, u64>,
region_approximate_keys: HashMap<u64, u64>,
region_last_report_ts: HashMap<u64, u64>,
base_id: AtomicUsize,
store_stats: HashMap<u64, pdpb::StoreStats>,
split_count: usize,
// region id -> Operator
operators: HashMap<u64, Operator>,
enable_peer_count_check: bool,
// region id -> leader
leaders: HashMap<u64, metapb::Peer>,
down_peers: HashMap<u64, pdpb::PeerStats>,
pending_peers: HashMap<u64, metapb::Peer>,
is_bootstraped: bool,
gc_safe_point: u64,
}
impl Cluster {
fn new(cluster_id: u64) -> Cluster {
let mut meta = metapb::Cluster::new();
meta.set_id(cluster_id);
meta.set_max_peer_count(5);
Cluster {
meta,
stores: HashMap::default(),
regions: BTreeMap::new(),
region_id_keys: HashMap::default(),
region_approximate_size: HashMap::default(),
region_approximate_keys: HashMap::default(),
region_last_report_ts: HashMap::default(),
base_id: AtomicUsize::new(1000),
store_stats: HashMap::default(),
split_count: 0,
operators: HashMap::default(),
enable_peer_count_check: true,
leaders: HashMap::default(),
down_peers: HashMap::default(),
pending_peers: HashMap::default(),
is_bootstraped: false,
gc_safe_point: 0,
}
}
fn bootstrap(&mut self, store: metapb::Store, region: metapb::Region) {
// Now, some tests use multi peers in bootstrap,
// disable this check.
// TODO: enable this check later.
// assert_eq!(region.get_peers().len(), 1);
let store_id = store.get_id();
let mut s = Store::default();
s.store = store;
s.region_ids.insert(region.get_id());
self.stores.insert(store_id, s);
self.add_region(®ion);
self.is_bootstraped = true;
}
fn set_bootstrap(&mut self, is_bootstraped: bool) {
self.is_bootstraped = is_bootstraped
}
// We don't care cluster id here, so any value like 0 in tests is ok.
fn alloc_id(&self) -> Result<u64> {
Ok(self.base_id.fetch_add(1, Ordering::Relaxed) as u64)
}
fn put_store(&mut self, store: metapb::Store) -> Result<()> {
let mut s = Store::default();
let store_id = store.get_id();
s.store = store;
self.stores.insert(store_id, s);
Ok(())
}
fn get_store(&self, store_id: u64) -> Result<metapb::Store> {
match self.stores.get(&store_id) {
None => Err(box_err!("store {} not found", store_id)),
Some(s) => Ok(s.store.clone()),
}
}
fn get_region(&self, key: Vec<u8>) -> Option<metapb::Region> {
self.regions
.range((Excluded(key), Unbounded))
.next()
.map(|(_, region)| region.clone())
}
fn get_region_by_id(&self, region_id: u64) -> Result<Option<metapb::Region>> {
Ok(self
.region_id_keys
.get(®ion_id)
.and_then(|k| self.regions.get(k).cloned()))
}
fn get_region_approximate_size(&self, region_id: u64) -> Option<u64> {
self.region_approximate_size.get(®ion_id).cloned()
}
fn get_region_approximate_keys(&self, region_id: u64) -> Option<u64> {
self.region_approximate_keys.get(®ion_id).cloned()
}
fn get_region_last_report_ts(&self, region_id: u64) -> Option<u64> {
self.region_last_report_ts.get(®ion_id).cloned()
}
fn get_stores(&self) -> Vec<metapb::Store> {
self.stores.values().map(|s| s.store.clone()).collect()
}
fn get_regions_number(&self) -> usize {
self.regions.len()
}
fn add_region(&mut self, region: &metapb::Region) {
let end_key = enc_end_key(region);
assert!(self
.regions
.insert(end_key.clone(), region.clone())
.is_none());
assert!(self
.region_id_keys
.insert(region.get_id(), end_key.clone())
.is_none());
}
fn remove_region(&mut self, region: &metapb::Region) {
let end_key = enc_end_key(region);
assert!(self.regions.remove(&end_key).is_some());
assert!(self.region_id_keys.remove(®ion.get_id()).is_some());
}
fn handle_heartbeat_version(&mut self, region: metapb::Region) -> Result<()> {
// For split, we should handle heartbeat carefully.
// E.g, for region 1 [a, c) -> 1 [a, b) + 2 [b, c).
// after split, region 1 and 2 will do heartbeat independently.
let start_key = enc_start_key(®ion);
let end_key = enc_end_key(®ion);
assert!(end_key > start_key);
let version = region.get_region_epoch().get_version();
loop {
let search_key = data_key(region.get_start_key());
let search_region = match self.get_region(search_key) {
None => {
// Find no range after start key, insert directly.
self.add_region(®ion);
return Ok(());
}
Some(search_region) => search_region,
};
let search_start_key = enc_start_key(&search_region);
let search_end_key = enc_end_key(&search_region);
let search_version = search_region.get_region_epoch().get_version();
if start_key == search_start_key && end_key == search_end_key {
// we are the same, must check epoch here.
check_stale_region(&search_region, ®ion)?;
if search_region.get_region_epoch().get_version()
< region.get_region_epoch().get_version()
{
self.remove_region(&search_region);
self.add_region(®ion);
}
return Ok(());
}
if search_start_key >= end_key {
// No range covers [start, end) now, insert directly.
self.add_region(®ion);
return Ok(());
} else {
// overlap, remove old, insert new.
// E.g, 1 [a, c) -> 1 [a, b) + 2 [b, c), either new 1 or 2 reports, the region
// is overlapped with origin [a, c).
if version <= search_version {
return Err(box_err!("epoch {:?} is stale.", region.get_region_epoch()));
}
self.remove_region(&search_region);
}
}
}
fn handle_heartbeat_conf_ver(
&mut self,
mut region: metapb::Region,
leader: metapb::Peer,
) -> Result<pdpb::RegionHeartbeatResponse> {
let conf_ver = region.get_region_epoch().get_conf_ver();
let end_key = enc_end_key(®ion);
// it can pass handle_heartbeat_version means it must exist.
let cur_region = self.get_region_by_id(region.get_id()).unwrap().unwrap();
let cur_conf_ver = cur_region.get_region_epoch().get_conf_ver();
check_stale_region(&cur_region, ®ion)?;
let region_peer_len = region.get_peers().len();
let cur_region_peer_len = cur_region.get_peers().len();
if conf_ver > cur_conf_ver {
if region_peer_len == cur_region_peer_len {
// For promote learner to voter.
let get_learners =
|r: &Region| r.get_peers().iter().filter(|p| p.get_is_learner()).count();
let region_learner_len = get_learners(®ion);
let cur_region_learner_len = get_learners(&cur_region);
assert_eq!(cur_region_learner_len, region_learner_len + 1);
} else if cur_region_peer_len > region_peer_len {
// If ConfVer changed, TiKV has added/removed one peer already.
// So pd and TiKV can't have same peer count and can only have
// only one different peer.
// E.g, we can't meet following cases:
// 1) pd is (1, 2, 3), TiKV is (1)
// 2) pd is (1), TiKV is (1, 2, 3)
// 3) pd is (1, 2), TiKV is (3)
// 4) pd id (1), TiKV is (2, 3)
// must pd is (1, 2), TiKV is (1)
assert_eq!(cur_region_peer_len - region_peer_len, 1);
let peers = setdiff_peers(&cur_region, ®ion);
assert_eq!(peers.len(), 1);
assert!(setdiff_peers(®ion, &cur_region).is_empty());
} else if cur_region_peer_len < region_peer_len {
// must pd is (1), TiKV is (1, 2)
assert_eq!(region_peer_len - cur_region_peer_len, 1);
let peers = setdiff_peers(®ion, &cur_region);
assert_eq!(peers.len(), 1);
assert!(setdiff_peers(&cur_region, ®ion).is_empty());
} else {
must_same_peers(&cur_region, ®ion);
assert_eq!(cur_conf_ver + 1, conf_ver);
assert_eq!(
cur_region.get_region_epoch().get_version() + 1,
region.get_region_epoch().get_version()
);
}
// update the region.
assert!(self.regions.insert(end_key, region.clone()).is_some());
} else {
must_same_peers(&cur_region, ®ion);
}
let resp = self
.poll_heartbeat_responses(region.clone(), leader.clone())
.unwrap_or_else(|| {
let mut resp = pdpb::RegionHeartbeatResponse::new();
resp.set_region_id(region.get_id());
resp.set_region_epoch(region.take_region_epoch());
resp.set_target_peer(leader);
resp
});
Ok(resp)
}
// max_peer_count check, the default operator for handling region heartbeat.
fn handle_heartbeat_max_peer_count(
&mut self,
region: &metapb::Region,
leader: &metapb::Peer,
) -> Option<Operator> {
let max_peer_count = self.meta.get_max_peer_count() as usize;
let peer_count = region.get_peers().len();
if peer_count < max_peer_count {
// find the first store which the region has not covered.
for store_id in self.stores.keys() {
if region
.get_peers()
.iter()
.all(|x| x.get_store_id() != *store_id)
{
let peer = Either::Left(new_peer(*store_id, self.alloc_id().unwrap()));
let policy = SchedulePolicy::Repeat(1);
return Some(Operator::AddPeer { peer, policy });
}
}
} else if peer_count > max_peer_count {
// find the first peer which not leader.
let pos = region
.get_peers()
.iter()
.position(|x| x.get_store_id() != leader.get_store_id())
.unwrap();
let peer = region.get_peers()[pos].clone();
let policy = SchedulePolicy::Repeat(1);
return Some(Operator::RemovePeer { peer, policy });
}
None
}
fn poll_heartbeat_responses_for(
&mut self,
store_id: u64,
) -> Vec<pdpb::RegionHeartbeatResponse> {
let mut resps = vec![];
for (region_id, leader) in self.leaders.clone() {
if leader.get_store_id() != store_id {
continue;
}
if let Ok(Some(region)) = self.get_region_by_id(region_id) {
if let Some(resp) = self.poll_heartbeat_responses(region, leader) {
resps.push(resp);
}
}
}
resps
}
fn poll_heartbeat_responses(
&mut self,
mut region: metapb::Region,
leader: metapb::Peer,
) -> Option<pdpb::RegionHeartbeatResponse> {
let region_id = region.get_id();
let mut operator = None;
if let Some(mut op) = self.operators.remove(®ion_id) {
if !op.try_finished(self, ®ion, &leader) {
operator = Some(op);
};
} else if self.enable_peer_count_check {
// There is no on-going operator, start next round.
operator = self.handle_heartbeat_max_peer_count(®ion, &leader);
}
let operator = operator?;
debug!(
"[region {}] schedule {:?} to {:?}, region: {:?}",
region_id, operator, leader, region
);
let mut resp = operator.make_region_heartbeat_response(region.get_id(), self);
self.operators.insert(region_id, operator);
resp.set_region_id(region_id);
resp.set_region_epoch(region.take_region_epoch());
resp.set_target_peer(leader);
Some(resp)
}
fn region_heartbeat(
&mut self,
region: metapb::Region,
leader: metapb::Peer,
region_stat: RegionStat,
) -> Result<pdpb::RegionHeartbeatResponse> {
for peer in region.get_peers() {
self.down_peers.remove(&peer.get_id());
self.pending_peers.remove(&peer.get_id());
}
for peer in region_stat.down_peers {
self.down_peers.insert(peer.get_peer().get_id(), peer);
}
for p in region_stat.pending_peers {
self.pending_peers.insert(p.get_id(), p);
}
self.leaders.insert(region.get_id(), leader.clone());
self.region_approximate_size
.insert(region.get_id(), region_stat.approximate_size);
self.region_approximate_keys
.insert(region.get_id(), region_stat.approximate_keys);
self.region_last_report_ts
.insert(region.get_id(), region_stat.last_report_ts);
self.handle_heartbeat_version(region.clone())?;
self.handle_heartbeat_conf_ver(region, leader)
}
fn set_gc_safe_point(&mut self, safe_point: u64) {
self.gc_safe_point = safe_point;
}
fn get_gc_safe_point(&self) -> u64 {
self.gc_safe_point
}
}
fn check_stale_region(region: &metapb::Region, check_region: &metapb::Region) -> Result<()> {
let epoch = region.get_region_epoch();
let check_epoch = check_region.get_region_epoch();
if check_epoch.get_conf_ver() >= epoch.get_conf_ver()
&& check_epoch.get_version() >= epoch.get_version()
{
return Ok(());
}
Err(box_err!(
"epoch not match {:?}, we are now {:?}",
check_epoch,
epoch
))
}
fn must_same_peers(left: &metapb::Region, right: &metapb::Region) {
assert_eq!(left.get_peers().len(), right.get_peers().len());
for peer in left.get_peers() {
let p = find_peer(right, peer.get_store_id()).unwrap();
assert_eq!(p, peer);
}
}
// Left - Right, left (1, 2, 3), right (1, 2), left - right = (3)
fn setdiff_peers(left: &metapb::Region, right: &metapb::Region) -> Vec<metapb::Peer> {
let mut peers = vec![];
for peer in left.get_peers() {
if let Some(p) = find_peer(right, peer.get_store_id()) {
assert_eq!(p.get_id(), peer.get_id());
continue;
}
peers.push(peer.clone())
}
peers
}
// For test when a node is already bootstraped the cluster with the first region
pub fn bootstrap_with_first_region(pd_client: Arc<TestPdClient>) -> Result<()> {
let mut region = metapb::Region::new();
region.set_id(1);
region.set_start_key(keys::EMPTY_KEY.to_vec());
region.set_end_key(keys::EMPTY_KEY.to_vec());
region.mut_region_epoch().set_version(INIT_EPOCH_VER);
region.mut_region_epoch().set_conf_ver(INIT_EPOCH_CONF_VER);
let peer = new_peer(1, 1);
region.mut_peers().push(peer.clone());
pd_client.add_region(®ion);
pd_client.set_bootstrap(true);
Ok(())
}
pub struct TestPdClient {
cluster_id: u64,
cluster: Arc<RwLock<Cluster>>,
timer: Handle,
is_incompatible: bool,
}
impl TestPdClient {
pub fn new(cluster_id: u64, is_incompatible: bool) -> TestPdClient {
TestPdClient {
cluster_id,
cluster: Arc::new(RwLock::new(Cluster::new(cluster_id))),
timer: GLOBAL_TIMER_HANDLE.clone(),
is_incompatible,
}
}
pub fn get_stores(&self) -> Result<Vec<metapb::Store>> {
Ok(self.cluster.rl().get_stores())
}
fn check_bootstrap(&self) -> Result<()> {
if !self.is_cluster_bootstrapped().unwrap() {
return Err(Error::ClusterNotBootstrapped(self.cluster_id));
}
Ok(())
}
fn is_regions_empty(&self) -> bool {
self.cluster.rl().regions.is_empty()
}
fn schedule_operator(&self, region_id: u64, op: Operator) {
let mut cluster = self.cluster.wl();
match cluster.operators.entry(region_id) {
HashMapEntry::Occupied(mut e) => {
debug!(
"[region {}] schedule operator {:?} and remove {:?}",
region_id,
op,
e.get()
);
e.insert(op);
}
HashMapEntry::Vacant(e) => {
debug!("[region {}] schedule operator {:?}", region_id, op);
e.insert(op);
}
}
}
pub fn get_region_epoch(&self, region_id: u64) -> metapb::RegionEpoch {
self.get_region_by_id(region_id)
.wait()
.unwrap()
.unwrap()
.take_region_epoch()
}
pub fn get_regions_number(&self) -> usize {
self.cluster.rl().get_regions_number()
}
pub fn disable_default_operator(&self) {
self.cluster.wl().enable_peer_count_check = false;
}
pub fn enable_default_operator(&self) {
self.cluster.wl().enable_peer_count_check = true;
}
pub fn must_have_peer(&self, region_id: u64, peer: metapb::Peer) {
for _ in 1..500 {
sleep_ms(10);
let region = match self.get_region_by_id(region_id).wait().unwrap() {
Some(region) => region,
None => continue,
};
if let Some(p) = find_peer(®ion, peer.get_store_id()) {
if p == &peer {
return;
}
}
}
let region = self.get_region_by_id(region_id).wait().unwrap();
panic!("region {:?} has no peer {:?}", region, peer);
}
pub fn must_none_peer(&self, region_id: u64, peer: metapb::Peer) {
for _ in 1..500 {
sleep_ms(10);
let region = match self.get_region_by_id(region_id).wait().unwrap() {
Some(region) => region,
None => continue,
};
match find_peer(®ion, peer.get_store_id()) {
None => return,
Some(p) if p != &peer => return,
_ => continue,
}
}
let region = self.get_region_by_id(region_id).wait().unwrap();
panic!("region {:?} has peer {:?}", region, peer);
}
pub fn must_none_pending_peer(&self, peer: metapb::Peer) {
for _ in 1..500 {
sleep_ms(10);
if self.cluster.rl().pending_peers.contains_key(&peer.get_id()) {
continue;
}
return;
}
panic!("peer {:?} shouldn't be pending any more", peer);
}
pub fn add_region(&self, region: &metapb::Region) {
self.cluster.wl().add_region(region)
}
pub fn transfer_leader(&self, region_id: u64, peer: metapb::Peer) {
let op = Operator::TransferLeader {
peer,
policy: SchedulePolicy::TillSuccess,
};
self.schedule_operator(region_id, op);
}
pub fn add_peer(&self, region_id: u64, peer: metapb::Peer) {
let op = Operator::AddPeer {
peer: Either::Left(peer),
policy: SchedulePolicy::TillSuccess,
};
self.schedule_operator(region_id, op);
}
pub fn remove_peer(&self, region_id: u64, peer: metapb::Peer) {
let op = Operator::RemovePeer {
peer,
policy: SchedulePolicy::TillSuccess,
};
self.schedule_operator(region_id, op);
}
pub fn split_region(
&self,
mut region: metapb::Region,
policy: pdpb::CheckPolicy,
keys: Vec<Vec<u8>>,
) {
let op = Operator::SplitRegion {
region_epoch: region.take_region_epoch(),
policy,
keys,
};
self.schedule_operator(region.get_id(), op);
}
pub fn must_split_region(
&self,
region: metapb::Region,
policy: pdpb::CheckPolicy,
keys: Vec<Vec<u8>>,
) {
let expect_region_count = self.get_regions_number()
+ if policy == pdpb::CheckPolicy::USEKEY {
keys.len()
} else {
1
};
self.split_region(region.clone(), policy, keys);
for _ in 1..500 {
sleep_ms(10);
if self.get_regions_number() == expect_region_count {
return;
}
}
panic!("region {:?} is still not split.", region);
}
pub fn must_add_peer(&self, region_id: u64, peer: metapb::Peer) {
self.add_peer(region_id, peer.clone());
self.must_have_peer(region_id, peer.clone());
}
pub fn must_remove_peer(&self, region_id: u64, peer: metapb::Peer) {
self.remove_peer(region_id, peer.clone());
self.must_none_peer(region_id, peer);
}
pub fn merge_region(&self, from: u64, target: u64) {
let op = Operator::MergeRegion {
source_region_id: from,
target_region_id: target,
policy: Arc::new(RwLock::new(SchedulePolicy::TillSuccess)),
};
self.schedule_operator(from, op.clone());
self.schedule_operator(target, op);
}
pub fn must_merge(&self, from: u64, target: u64) {
self.merge_region(from, target);
self.check_merged_timeout(from, Duration::from_secs(5));
}
pub fn check_merged(&self, from: u64) -> bool {
self.get_region_by_id(from).wait().unwrap().is_none()
}
pub fn check_merged_timeout(&self, from: u64, duration: Duration) {
let timer = Instant::now();
loop {
let region = self.get_region_by_id(from).wait().unwrap();
if let Some(r) = region {
if timer.elapsed() > duration {
panic!("region {:?} is still not merged.", r);
}
} else {
return;
}
sleep_ms(10);
}
}
pub fn region_leader_must_be(&self, region_id: u64, peer: metapb::Peer) {
for _ in 0..500 {
sleep_ms(10);
if let Some(p) = self.cluster.rl().leaders.get(®ion_id) {
if *p == peer {
return;
}
}
}
panic!("region {} must have leader: {:?}", region_id, peer);
}
// check whether region is split by split_key or not.
pub fn check_split(&self, region: &metapb::Region, split_key: &[u8]) -> bool {
// E.g, 1 [a, c) -> 1 [a, b) + 2 [b, c)
// use a to find new [a, b).
// use b to find new [b, c)
let left = match self.get_region(region.get_start_key()) {
Err(_) => return false,
Ok(left) => left,
};
if left.get_end_key() != split_key {
return false;
}
let right = match self.get_region(split_key) {
Err(_) => return false,
Ok(right) => right,
};
if right.get_start_key() != split_key {
return false;
}
assert!(left.get_region_epoch().get_version() > region.get_region_epoch().get_version());
assert!(right.get_region_epoch().get_version() > region.get_region_epoch().get_version());
true
}
pub fn get_store_stats(&self, store_id: u64) -> Option<pdpb::StoreStats> {
self.cluster.rl().store_stats.get(&store_id).cloned()
}
pub fn get_split_count(&self) -> usize {
self.cluster.rl().split_count
}
pub fn get_down_peers(&self) -> HashMap<u64, pdpb::PeerStats> {
self.cluster.rl().down_peers.clone()
}
pub fn get_pending_peers(&self) -> HashMap<u64, metapb::Peer> {
self.cluster.rl().pending_peers.clone()
}
pub fn set_bootstrap(&self, is_bootstraped: bool) {
self.cluster.wl().set_bootstrap(is_bootstraped);
}
pub fn get_region_approximate_size(&self, region_id: u64) -> Option<u64> {
self.cluster.rl().get_region_approximate_size(region_id)
}
pub fn get_region_approximate_keys(&self, region_id: u64) -> Option<u64> {
self.cluster.rl().get_region_approximate_keys(region_id)
}
pub fn get_region_last_report_ts(&self, region_id: u64) -> Option<u64> {
self.cluster.rl().get_region_last_report_ts(region_id)
}
pub fn set_gc_safe_point(&self, safe_point: u64) {
self.cluster.wl().set_gc_safe_point(safe_point);
}
}
impl PdClient for TestPdClient {
fn get_cluster_id(&self) -> Result<u64> {
Ok(self.cluster_id)
}
fn bootstrap_cluster(&self, store: metapb::Store, region: metapb::Region) -> Result<()> {
if self.is_cluster_bootstrapped().unwrap() || !self.is_regions_empty() {
self.cluster.wl().set_bootstrap(true);
return Err(Error::ClusterBootstrapped(self.cluster_id));
}
self.cluster.wl().bootstrap(store, region);
Ok(())
}
fn is_cluster_bootstrapped(&self) -> Result<bool> {
Ok(self.cluster.rl().is_bootstraped)
}
fn alloc_id(&self) -> Result<u64> {
self.cluster.rl().alloc_id()
}
fn put_store(&self, store: metapb::Store) -> Result<()> {
self.check_bootstrap()?;
self.cluster.wl().put_store(store)
}
fn get_store(&self, store_id: u64) -> Result<metapb::Store> {
self.check_bootstrap()?;
self.cluster.rl().get_store(store_id)
}
fn get_region(&self, key: &[u8]) -> Result<metapb::Region> {
self.check_bootstrap()?;
if let Some(region) = self.cluster.rl().get_region(data_key(key)) {
if check_key_in_region(key, ®ion).is_ok() {
return Ok(region);