forked from percona/percona-backup-mongodb
/
trx.go
409 lines (352 loc) · 10.8 KB
/
trx.go
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package sharded
import (
"context"
"log"
"strings"
"time"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
"go.mongodb.org/mongo-driver/mongo/options"
"go.mongodb.org/mongo-driver/mongo/readconcern"
"go.mongodb.org/mongo-driver/mongo/readpref"
"go.mongodb.org/mongo-driver/mongo/writeconcern"
"github.com/objectrocket/percona-backup-mongodb/e2e-tests/pkg/pbm"
)
type shard struct {
name string
cn *pbm.Mongo
}
type trxData struct {
Country string
UID int
}
const trxdb = "trx"
func (c *Cluster) DistributedTransactions(bcp Backuper, col string) {
const trxLimitT = 300
dbcol := trxdb + "." + col
ctx := context.Background()
conn := c.mongos.Conn()
log.Println("Updating transactionLifetimeLimitSeconds to", trxLimitT)
err := c.mongopbm.Conn().Database("admin").RunCommand(
ctx,
bson.D{{"setParameter", 1}, {"transactionLifetimeLimitSeconds", trxLimitT}},
).Err()
if err != nil {
log.Fatalln("ERROR: update transactionLifetimeLimitSeconds:", err)
}
for sname, cn := range c.shards {
log.Printf("Updating transactionLifetimeLimitSeconds for %s to %d", sname, trxLimitT)
err := cn.Conn().Database("admin").RunCommand(
ctx,
bson.D{{"setParameter", 1}, {"transactionLifetimeLimitSeconds", trxLimitT}},
).Err()
if err != nil {
log.Fatalf("ERROR: update transactionLifetimeLimitSeconds for shard %s: %v", sname, err)
}
}
c.setupTrxCollection(ctx, col)
c.moveChunk(ctx, col, 0, "rs1")
c.moveChunk(ctx, col, 30, "rs1")
c.moveChunk(ctx, col, 89, "rs1")
c.moveChunk(ctx, col, 99, "rs1")
c.moveChunk(ctx, col, 110, "rs1")
c.moveChunk(ctx, col, 130, "rs1")
c.moveChunk(ctx, col, 131, "rs1")
c.moveChunk(ctx, col, 630, "rs2")
c.moveChunk(ctx, col, 530, "rs2")
c.moveChunk(ctx, col, 631, "rs2")
c.moveChunk(ctx, col, 730, "rs2")
c.moveChunk(ctx, col, 3000, "rs2")
c.moveChunk(ctx, col, 3001, "rs2")
c.moveChunk(ctx, col, 180, "rs2")
c.moveChunk(ctx, col, 199, "rs2")
c.moveChunk(ctx, col, 2001, "rs2")
_, err = conn.Database(trxdb).Collection(col).DeleteMany(ctx, bson.M{})
if err != nil {
log.Fatalf("ERROR: delete data from %s: %v", dbcol, err)
}
err = c.mongos.GenData(trxdb, col, 5000)
if err != nil {
log.Fatalln("ERROR: GenData:", err)
}
sess, err := conn.StartSession(
options.Session().
SetDefaultReadPreference(readpref.Primary()).
SetCausalConsistency(true).
SetDefaultReadConcern(readconcern.Majority()).
SetDefaultWriteConcern(writeconcern.New(writeconcern.WMajority())),
)
if err != nil {
log.Fatalln("ERROR: start session:", err)
}
defer sess.EndSession(ctx)
err = conn.Database("admin").RunCommand(
ctx,
bson.D{
{"moveChunk", dbcol},
{"find", bson.M{"idx": 2000}},
{"to", "rs2"},
},
).Err()
if err != nil {
log.Printf("ERROR: moveChunk %s/idx:2000: %v", dbcol, err)
}
c.printBalancerStatus(ctx)
log.Println("Starting a backup")
go bcp.Backup()
// distributed transaction that commits before the backup ends
// should be visible after restore
log.Println("Run trx1")
sess.WithTransaction(ctx, func(sc mongo.SessionContext) (interface{}, error) {
c.trxSet(sc, 30, col)
c.trxSet(sc, 530, col)
bcp.WaitStarted()
c.trxSet(sc, 130, col)
c.trxSet(sc, 131, col)
c.trxSet(sc, 630, col)
c.trxSet(sc, 631, col)
bcp.WaitSnapshot()
c.trxSet(sc, 110, col)
c.trxSet(sc, 730, col)
c.trxSet(sc, 3000, col)
c.trxSet(sc, 3001, col)
return nil, nil
})
log.Println("Run trx2")
// distributed transaction that commits after the backup ends
// should NOT be visible after the restore
mongo.WithSession(ctx, sess, func(sc mongo.SessionContext) error {
err := sess.StartTransaction()
if err != nil {
log.Fatalln("ERROR: start transaction:", err)
}
defer func() {
if err != nil {
sess.AbortTransaction(sc)
log.Fatalln("ERROR: transaction:", err)
}
}()
c.trxSet(sc, 0, col)
c.trxSet(sc, 89, col)
c.trxSet(sc, 180, col)
c.printBalancerStatus(ctx)
log.Println("Waiting for the backup to done")
bcp.WaitDone()
log.Println("Backup done")
c.printBalancerStatus(ctx)
c.trxSet(sc, 99, col)
c.trxSet(sc, 199, col)
c.trxSet(sc, 2001, col)
log.Println("Commiting the transaction")
err = sess.CommitTransaction(sc)
if err != nil {
log.Fatalln("ERROR: commit in transaction:", err)
}
return nil
})
sess.EndSession(ctx)
c.printBalancerStatus(ctx)
c.checkTrxCollection(ctx, col, bcp)
}
func (c *Cluster) trxSet(ctx mongo.SessionContext, id int, col string) {
log.Print("\ttrx", id)
err := c.updateTrxRetry(ctx, col, bson.M{"idx": id}, bson.D{{"$set", bson.M{"changed": 1}}})
if err != nil {
log.Fatalf("ERROR: update in transaction trx%d: %v", id, err)
}
}
// updateTrxRetry tries to run an update operation and in case of the StaleConfig error
// it run flushRouterConfig and tries again
func (c *Cluster) updateTrxRetry(ctx mongo.SessionContext, col string, filter interface{}, update interface{}) error {
var err error
conn := c.mongos.Conn()
for i := 0; i < 3; i++ {
c.flushRouterConfig(context.Background())
_, err = conn.Database(trxdb).Collection(col).UpdateOne(ctx, filter, update)
if err == nil {
return nil
}
if !strings.Contains(err.Error(), "StaleConfig") {
return err
}
}
return err
}
func (c *Cluster) printBalancerStatus(ctx context.Context) {
br := c.mongos.Conn().Database("admin").RunCommand(
ctx,
bson.D{{"balancerStatus", 1}},
)
state, err := br.DecodeBytes()
if err != nil {
log.Fatalln("ERROR: balancerStatus:", err)
}
log.Println("Ballancer status:", state)
}
func (c *Cluster) flushRouterConfig(ctx context.Context) {
log.Println("flushRouterConfig")
err := c.mongos.Conn().Database("admin").RunCommand(
ctx,
bson.D{{"flushRouterConfig", 1}},
).Err()
if err != nil {
log.Fatalln("ERROR: flushRouterConfig:", err)
}
}
func (c *Cluster) deleteTrxData(ctx context.Context, col string, tout time.Duration) bool {
log.Printf("Deleting %s.%s data", trxdb, col)
timer := time.NewTimer(tout)
defer timer.Stop()
tk := time.NewTicker(time.Second * 1)
defer tk.Stop()
for {
select {
case <-timer.C:
log.Printf("Warning: unable to drop %s.%s. %v timeout exceeded", trxdb, col, tout)
return false
case <-tk.C:
err := c.mongos.Conn().Database(trxdb).Collection(col).Drop(ctx)
if err == nil {
return true
}
if err != nil && !strings.Contains(err.Error(), "LockBusy") {
log.Fatalf("ERROR: drop %s.%s collections: %v", trxdb, col, err)
}
}
}
}
func (c *Cluster) setupTrxCollection(ctx context.Context, col string) {
conn := c.mongos.Conn()
if ok := c.deleteTrxData(ctx, col, time.Minute*5); !ok {
_, err := conn.Database(trxdb).Collection(col).DeleteMany(ctx, bson.D{})
if err != nil {
log.Fatalf("ERROR: delete data from the old %s.%s collection: %v", trxdb, col, err)
}
}
log.Println("Creating a sharded collection")
err := conn.Database(trxdb).RunCommand(
ctx,
bson.D{{"create", col}},
).Err()
if err != nil {
log.Fatalf("ERROR: create %s.%s collections: %v", trxdb, col, err)
}
err = conn.Database("admin").RunCommand(
ctx,
bson.D{{"enableSharding", trxdb}},
).Err()
if err != nil {
log.Fatalln("ERROR: enableSharding on trx db:", err)
}
err = conn.Database("admin").RunCommand(
ctx,
bson.D{{"shardCollection", trxdb + "." + col}, {"key", bson.M{"idx": 1}}},
).Err()
if err != nil {
log.Fatalf("ERROR: shardCollection %s.%s: %v", trxdb, col, err)
}
err = conn.Database("admin").RunCommand(
ctx,
bson.D{{"addShardToZone", "rs1"}, {"zone", "R1"}},
).Err()
if err != nil {
log.Fatalln("ERROR: addShardToZone rs1:", err)
}
err = conn.Database("admin").RunCommand(
ctx,
bson.D{{"addShardToZone", "rs2"}, {"zone", "R2"}},
).Err()
if err != nil {
log.Fatalln("ERROR: addShardToZone rs2:", err)
}
err = conn.Database("admin").RunCommand(
ctx,
bson.D{{"updateZoneKeyRange", trxdb + "." + col}, {"min", bson.M{"idx": 0}}, {"max", bson.M{"idx": 151}}, {"zone", "R1"}},
).Err()
if err != nil {
log.Fatalf("ERROR: updateZoneKeyRange %s.%s./R1: %v", trxdb, col, err)
}
err = conn.Database("admin").RunCommand(
ctx,
bson.D{{"updateZoneKeyRange", trxdb + "." + col}, {"min", bson.M{"idx": 151}}, {"max", bson.M{"idx": 1000}}, {"zone", "R2"}},
).Err()
if err != nil {
log.Fatalf("ERROR: updateZoneKeyRange %s.%s./R2: %v", trxdb, col, err)
}
}
func (c *Cluster) moveChunk(ctx context.Context, col string, idx int, to string) {
log.Println("move chunk", idx, "to", to)
err := c.mongos.Conn().Database("admin").RunCommand(
ctx,
bson.D{
{"moveChunk", trxdb + "." + col},
{"find", bson.M{"idx": idx}},
{"to", to},
},
).Err()
if err != nil {
log.Printf("ERROR: moveChunk %s.%s/idx:2000: %v", trxdb, col, err)
}
}
func (c *Cluster) checkTrxCollection(ctx context.Context, col string, bcp Backuper) {
log.Println("Checking restored data")
c.DeleteBallast()
if ok := c.deleteTrxData(ctx, col, time.Minute*1); !ok {
c.zeroTrxDoc(ctx, col, 30)
c.zeroTrxDoc(ctx, col, 530)
c.zeroTrxDoc(ctx, col, 130)
c.zeroTrxDoc(ctx, col, 131)
c.zeroTrxDoc(ctx, col, 630)
c.zeroTrxDoc(ctx, col, 631)
c.zeroTrxDoc(ctx, col, 110)
c.zeroTrxDoc(ctx, col, 730)
c.zeroTrxDoc(ctx, col, 3000)
c.zeroTrxDoc(ctx, col, 3001)
c.zeroTrxDoc(ctx, col, 0)
c.zeroTrxDoc(ctx, col, 89)
c.zeroTrxDoc(ctx, col, 99)
c.zeroTrxDoc(ctx, col, 180)
c.zeroTrxDoc(ctx, col, 199)
c.zeroTrxDoc(ctx, col, 2001)
}
c.flushRouterConfig(ctx)
bcp.Restore()
log.Println("check commited transaction")
c.checkTrxDoc(ctx, col, 30, 1)
c.checkTrxDoc(ctx, col, 530, 1)
c.checkTrxDoc(ctx, col, 130, 1)
c.checkTrxDoc(ctx, col, 131, 1)
c.checkTrxDoc(ctx, col, 630, 1)
c.checkTrxDoc(ctx, col, 631, 1)
c.checkTrxDoc(ctx, col, 110, 1)
c.checkTrxDoc(ctx, col, 730, 1)
c.checkTrxDoc(ctx, col, 3000, 1)
c.checkTrxDoc(ctx, col, 3001, 1)
log.Println("check uncommited (commit wasn't dropped to backup) transaction")
c.checkTrxDoc(ctx, col, 0, -1)
c.checkTrxDoc(ctx, col, 89, -1)
c.checkTrxDoc(ctx, col, 99, -1)
c.checkTrxDoc(ctx, col, 180, -1)
c.checkTrxDoc(ctx, col, 199, -1)
c.checkTrxDoc(ctx, col, 2001, -1)
log.Println("check data that wasn't touched by transactions")
c.checkTrxDoc(ctx, col, 10, -1)
c.checkTrxDoc(ctx, col, 2000, -1)
}
func (c *Cluster) zeroTrxDoc(ctx context.Context, col string, id int) {
_, err := c.mongos.Conn().Database(trxdb).Collection(col).UpdateOne(ctx, bson.M{"idx": id}, bson.D{{"$set", bson.M{"changed": 0}}})
if err != nil {
log.Fatalf("ERROR: update idx %v: %v", id, err)
}
}
func (c *Cluster) checkTrxDoc(ctx context.Context, col string, id, expect int) {
log.Println("\tcheck", id, expect)
r1 := pbm.TestData{}
err := c.mongos.Conn().Database(trxdb).Collection(col).FindOne(ctx, bson.M{"idx": id}).Decode(&r1)
if err != nil {
log.Fatalf("ERROR: get %s.%s record `idx %v`: %v", trxdb, col, id, err)
}
if r1.C != expect {
log.Fatalf("ERROR: wrong %s.%s record `idx %v`. got: %v, expect: %v\n", trxdb, col, id, r1.C, expect)
}
}