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imgsrv/vendor/labix.org/v2/mgo/cluster_test.go

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// mgo - MongoDB driver for Go
//
// Copyright (c) 2010-2012 - Gustavo Niemeyer <gustavo@niemeyer.net>
//
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
// list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
// this list of conditions and the following disclaimer in the documentation
// and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
package mgo_test
import (
"fmt"
"io"
"labix.org/v2/mgo"
"labix.org/v2/mgo/bson"
. "launchpad.net/gocheck"
"net"
"strings"
"sync"
"time"
)
func (s *S) TestNewSession(c *C) {
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
// Do a dummy operation to wait for connection.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"_id": 1})
c.Assert(err, IsNil)
// Tweak safety and query settings to ensure other has copied those.
session.SetSafe(nil)
session.SetBatch(-1)
other := session.New()
defer other.Close()
session.SetSafe(&mgo.Safe{})
// Clone was copied while session was unsafe, so no errors.
otherColl := other.DB("mydb").C("mycoll")
err = otherColl.Insert(M{"_id": 1})
c.Assert(err, IsNil)
// Original session was made safe again.
err = coll.Insert(M{"_id": 1})
c.Assert(err, NotNil)
// With New(), each session has its own socket now.
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 2)
c.Assert(stats.SocketsInUse, Equals, 2)
// Ensure query parameters were cloned.
err = otherColl.Insert(M{"_id": 2})
c.Assert(err, IsNil)
// Ping the database to ensure the nonce has been received already.
c.Assert(other.Ping(), IsNil)
mgo.ResetStats()
iter := otherColl.Find(M{}).Iter()
c.Assert(err, IsNil)
m := M{}
ok := iter.Next(m)
c.Assert(ok, Equals, true)
err = iter.Close()
c.Assert(err, IsNil)
// If Batch(-1) is in effect, a single document must have been received.
stats = mgo.GetStats()
c.Assert(stats.ReceivedDocs, Equals, 1)
}
func (s *S) TestCloneSession(c *C) {
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
// Do a dummy operation to wait for connection.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"_id": 1})
c.Assert(err, IsNil)
// Tweak safety and query settings to ensure clone is copying those.
session.SetSafe(nil)
session.SetBatch(-1)
clone := session.Clone()
defer clone.Close()
session.SetSafe(&mgo.Safe{})
// Clone was copied while session was unsafe, so no errors.
cloneColl := clone.DB("mydb").C("mycoll")
err = cloneColl.Insert(M{"_id": 1})
c.Assert(err, IsNil)
// Original session was made safe again.
err = coll.Insert(M{"_id": 1})
c.Assert(err, NotNil)
// With Clone(), same socket is shared between sessions now.
stats := mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 1)
c.Assert(stats.SocketRefs, Equals, 2)
// Refreshing one of them should let the original socket go,
// while preserving the safety settings.
clone.Refresh()
err = cloneColl.Insert(M{"_id": 1})
c.Assert(err, IsNil)
// Must have used another connection now.
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 2)
c.Assert(stats.SocketRefs, Equals, 2)
// Ensure query parameters were cloned.
err = cloneColl.Insert(M{"_id": 2})
c.Assert(err, IsNil)
// Ping the database to ensure the nonce has been received already.
c.Assert(clone.Ping(), IsNil)
mgo.ResetStats()
iter := cloneColl.Find(M{}).Iter()
c.Assert(err, IsNil)
m := M{}
ok := iter.Next(m)
c.Assert(ok, Equals, true)
err = iter.Close()
c.Assert(err, IsNil)
// If Batch(-1) is in effect, a single document must have been received.
stats = mgo.GetStats()
c.Assert(stats.ReceivedDocs, Equals, 1)
}
func (s *S) TestSetModeStrong(c *C) {
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, false)
session.SetMode(mgo.Strong, false)
c.Assert(session.Mode(), Equals, mgo.Strong)
result := M{}
cmd := session.DB("admin").C("$cmd")
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 2)
c.Assert(stats.SocketsInUse, Equals, 1)
session.SetMode(mgo.Strong, true)
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestSetModeMonotonic(c *C) {
// Must necessarily connect to a slave, otherwise the
// master connection will be available first.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, false)
c.Assert(session.Mode(), Equals, mgo.Monotonic)
result := M{}
cmd := session.DB("admin").C("$cmd")
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, false)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
result = M{}
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 2)
c.Assert(stats.SocketsInUse, Equals, 2)
session.SetMode(mgo.Monotonic, true)
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestSetModeMonotonicAfterStrong(c *C) {
// Test that a strong session shifting to a monotonic
// one preserves the socket untouched.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
// Insert something to force a connection to the master.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
session.SetMode(mgo.Monotonic, false)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
// Master socket should still be reserved.
stats := mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 1)
// Confirm it's the master even though it's Monotonic by now.
result := M{}
cmd := session.DB("admin").C("$cmd")
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
}
func (s *S) TestSetModeStrongAfterMonotonic(c *C) {
// Test that shifting from Monotonic to Strong while
// using a slave socket will keep the socket reserved
// until the master socket is necessary, so that no
// switch over occurs unless it's actually necessary.
// Must necessarily connect to a slave, otherwise the
// master connection will be available first.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, false)
// Ensure we're talking to a slave, and reserve the socket.
result := M{}
err = session.Run("ismaster", &result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, false)
// Switch to a Strong session.
session.SetMode(mgo.Strong, false)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
// Slave socket should still be reserved.
stats := mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 1)
// But any operation will switch it to the master.
result = M{}
err = session.Run("ismaster", &result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
}
func (s *S) TestSetModeMonotonicWriteOnIteration(c *C) {
// Must necessarily connect to a slave, otherwise the
// master connection will be available first.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, false)
c.Assert(session.Mode(), Equals, mgo.Monotonic)
coll1 := session.DB("mydb").C("mycoll1")
coll2 := session.DB("mydb").C("mycoll2")
ns := []int{40, 41, 42, 43, 44, 45, 46}
for _, n := range ns {
err := coll1.Insert(M{"n": n})
c.Assert(err, IsNil)
}
// Release master so we can grab a slave again.
session.Refresh()
// Wait until synchronization is done.
for {
n, err := coll1.Count()
c.Assert(err, IsNil)
if n == len(ns) {
break
}
}
iter := coll1.Find(nil).Batch(2).Iter()
i := 0
m := M{}
for iter.Next(&m) {
i++
if i > 3 {
err := coll2.Insert(M{"n": 47 + i})
c.Assert(err, IsNil)
}
}
c.Assert(i, Equals, len(ns))
}
func (s *S) TestSetModeEventual(c *C) {
// Must necessarily connect to a slave, otherwise the
// master connection will be available first.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Eventual, false)
c.Assert(session.Mode(), Equals, mgo.Eventual)
result := M{}
err = session.Run("ismaster", &result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, false)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
result = M{}
err = session.Run("ismaster", &result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, false)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 2)
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestSetModeEventualAfterStrong(c *C) {
// Test that a strong session shifting to an eventual
// one preserves the socket untouched.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
// Insert something to force a connection to the master.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
session.SetMode(mgo.Eventual, false)
// Wait since the sync also uses sockets.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for cluster sync to finish...")
time.Sleep(5e8)
}
// Master socket should still be reserved.
stats := mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 1)
// Confirm it's the master even though it's Eventual by now.
result := M{}
cmd := session.DB("admin").C("$cmd")
err = cmd.Find(M{"ismaster": 1}).One(&result)
c.Assert(err, IsNil)
c.Assert(result["ismaster"], Equals, true)
session.SetMode(mgo.Eventual, true)
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestPrimaryShutdownStrong(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
// With strong consistency, this will open a socket to the master.
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
// Kill the master.
host := result.Host
s.Stop(host)
// This must fail, since the connection was broken.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// With strong consistency, it fails again until reset.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
session.Refresh()
// Now we should be able to talk to the new master.
// Increase the timeout since this may take quite a while.
session.SetSyncTimeout(3 * time.Minute)
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(result.Host, Not(Equals), host)
// Insert some data to confirm it's indeed a master.
err = session.DB("mydb").C("mycoll").Insert(M{"n": 42})
c.Assert(err, IsNil)
}
func (s *S) TestPrimaryHiccup(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
// With strong consistency, this will open a socket to the master.
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
// Establish a few extra sessions to create spare sockets to
// the master. This increases a bit the chances of getting an
// incorrect cached socket.
var sessions []*mgo.Session
for i := 0; i < 20; i++ {
sessions = append(sessions, session.Copy())
err = sessions[len(sessions)-1].Run("serverStatus", result)
c.Assert(err, IsNil)
}
for i := range sessions {
sessions[i].Close()
}
// Kill the master, but bring it back immediatelly.
host := result.Host
s.Stop(host)
s.StartAll()
// This must fail, since the connection was broken.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// With strong consistency, it fails again until reset.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
session.Refresh()
// Now we should be able to talk to the new master.
// Increase the timeout since this may take quite a while.
session.SetSyncTimeout(3 * time.Minute)
// Insert some data to confirm it's indeed a master.
err = session.DB("mydb").C("mycoll").Insert(M{"n": 42})
c.Assert(err, IsNil)
}
func (s *S) TestPrimaryShutdownMonotonic(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, true)
// Insert something to force a switch to the master.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
// Wait a bit for this to be synchronized to slaves.
time.Sleep(3 * time.Second)
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
// Kill the master.
host := result.Host
s.Stop(host)
// This must fail, since the connection was broken.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// With monotonic consistency, it fails again until reset.
err = session.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
session.Refresh()
// Now we should be able to talk to the new master.
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(result.Host, Not(Equals), host)
}
func (s *S) TestPrimaryShutdownMonotonicWithSlave(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
ssresult := &struct{ Host string }{}
imresult := &struct{ IsMaster bool }{}
// Figure the master while still using the strong session.
err = session.Run("serverStatus", ssresult)
c.Assert(err, IsNil)
err = session.Run("isMaster", imresult)
c.Assert(err, IsNil)
master := ssresult.Host
c.Assert(imresult.IsMaster, Equals, true, Commentf("%s is not the master", master))
// Create new monotonic session with an explicit address to ensure
// a slave is synchronized before the master, otherwise a connection
// with the master may be used below for lack of other options.
var addr string
switch {
case strings.HasSuffix(ssresult.Host, ":40021"):
addr = "localhost:40022"
case strings.HasSuffix(ssresult.Host, ":40022"):
addr = "localhost:40021"
case strings.HasSuffix(ssresult.Host, ":40023"):
addr = "localhost:40021"
default:
c.Fatal("Unknown host: ", ssresult.Host)
}
session, err = mgo.Dial(addr)
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, true)
// Check the address of the socket associated with the monotonic session.
c.Log("Running serverStatus and isMaster with monotonic session")
err = session.Run("serverStatus", ssresult)
c.Assert(err, IsNil)
err = session.Run("isMaster", imresult)
c.Assert(err, IsNil)
slave := ssresult.Host
c.Assert(imresult.IsMaster, Equals, false, Commentf("%s is not a slave", slave))
c.Assert(master, Not(Equals), slave)
// Kill the master.
s.Stop(master)
// Session must still be good, since we were talking to a slave.
err = session.Run("serverStatus", ssresult)
c.Assert(err, IsNil)
c.Assert(ssresult.Host, Equals, slave,
Commentf("Monotonic session moved from %s to %s", slave, ssresult.Host))
// If we try to insert something, it'll have to hold until the new
// master is available to move the connection, and work correctly.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
// Must now be talking to the new master.
err = session.Run("serverStatus", ssresult)
c.Assert(err, IsNil)
err = session.Run("isMaster", imresult)
c.Assert(err, IsNil)
c.Assert(imresult.IsMaster, Equals, true, Commentf("%s is not the master", master))
// ... which is not the old one, since it's still dead.
c.Assert(ssresult.Host, Not(Equals), master)
}
func (s *S) TestPrimaryShutdownEventual(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
master := result.Host
session.SetMode(mgo.Eventual, true)
// Should connect to the master when needed.
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
// Wait a bit for this to be synchronized to slaves.
time.Sleep(3 * time.Second)
// Kill the master.
s.Stop(master)
// Should still work, with the new master now.
coll = session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1})
c.Assert(err, IsNil)
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(result.Host, Not(Equals), master)
}
func (s *S) TestPreserveSocketCountOnSync(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
stats := mgo.GetStats()
for stats.MasterConns+stats.SlaveConns != 3 {
stats = mgo.GetStats()
c.Log("Waiting for all connections to be established...")
time.Sleep(5e8)
}
c.Assert(stats.SocketsAlive, Equals, 3)
// Kill the master (with rs1, 'a' is always the master).
s.Stop("localhost:40011")
// Wait for the logic to run for a bit and bring it back.
startedAll := make(chan bool)
go func() {
time.Sleep(5e9)
s.StartAll()
startedAll <- true
}()
// Do not allow the test to return before the goroutine above is done.
defer func() {
<-startedAll
}()
// Do an action to kick the resync logic in, and also to
// wait until the cluster recognizes the server is back.
result := struct{ Ok bool }{}
err = session.Run("getLastError", &result)
c.Assert(err, IsNil)
c.Assert(result.Ok, Equals, true)
for i := 0; i != 20; i++ {
stats = mgo.GetStats()
if stats.SocketsAlive == 3 {
break
}
c.Logf("Waiting for 3 sockets alive, have %d", stats.SocketsAlive)
time.Sleep(5e8)
}
// Ensure the number of sockets is preserved after syncing.
stats = mgo.GetStats()
c.Assert(stats.SocketsAlive, Equals, 3)
c.Assert(stats.SocketsInUse, Equals, 1)
c.Assert(stats.SocketRefs, Equals, 1)
}
// Connect to the master of a deployment with a single server,
// run an insert, and then ensure the insert worked and that a
// single connection was established.
func (s *S) TestTopologySyncWithSingleMaster(c *C) {
// Use hostname here rather than IP, to make things trickier.
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"a": 1, "b": 2})
c.Assert(err, IsNil)
// One connection used for discovery. Master socket recycled for
// insert. Socket is reserved after insert.
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 0)
c.Assert(stats.SocketsInUse, Equals, 1)
// Refresh session and socket must be released.
session.Refresh()
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestTopologySyncWithSlaveSeed(c *C) {
// That's supposed to be a slave. Must run discovery
// and find out master to insert successfully.
session, err := mgo.Dial("localhost:40012")
c.Assert(err, IsNil)
defer session.Close()
coll := session.DB("mydb").C("mycoll")
coll.Insert(M{"a": 1, "b": 2})
result := struct{ Ok bool }{}
err = session.Run("getLastError", &result)
c.Assert(err, IsNil)
c.Assert(result.Ok, Equals, true)
// One connection to each during discovery. Master
// socket recycled for insert.
stats := mgo.GetStats()
c.Assert(stats.MasterConns, Equals, 1)
c.Assert(stats.SlaveConns, Equals, 2)
// Only one socket reference alive, in the master socket owned
// by the above session.
c.Assert(stats.SocketsInUse, Equals, 1)
// Refresh it, and it must be gone.
session.Refresh()
stats = mgo.GetStats()
c.Assert(stats.SocketsInUse, Equals, 0)
}
func (s *S) TestSyncTimeout(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
s.Stop("localhost:40001")
timeout := 3 * time.Second
session.SetSyncTimeout(timeout)
started := time.Now()
// Do something.
result := struct{ Ok bool }{}
err = session.Run("getLastError", &result)
c.Assert(err, ErrorMatches, "no reachable servers")
c.Assert(started.Before(time.Now().Add(-timeout)), Equals, true)
c.Assert(started.After(time.Now().Add(-timeout*2)), Equals, true)
}
func (s *S) TestDialWithTimeout(c *C) {
if *fast {
c.Skip("-fast")
}
timeout := 2 * time.Second
started := time.Now()
// 40009 isn't used by the test servers.
session, err := mgo.DialWithTimeout("localhost:40009", timeout)
if session != nil {
session.Close()
}
c.Assert(err, ErrorMatches, "no reachable servers")
c.Assert(session, IsNil)
c.Assert(started.Before(time.Now().Add(-timeout)), Equals, true)
c.Assert(started.After(time.Now().Add(-timeout*2)), Equals, true)
}
func (s *S) TestSocketTimeout(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
s.Freeze("localhost:40001")
timeout := 3 * time.Second
session.SetSocketTimeout(timeout)
started := time.Now()
// Do something.
result := struct{ Ok bool }{}
err = session.Run("getLastError", &result)
c.Assert(err, ErrorMatches, ".*: i/o timeout")
c.Assert(started.Before(time.Now().Add(-timeout)), Equals, true)
c.Assert(started.After(time.Now().Add(-timeout*2)), Equals, true)
}
func (s *S) TestSocketTimeoutOnDial(c *C) {
if *fast {
c.Skip("-fast")
}
timeout := 1 * time.Second
defer mgo.HackSyncSocketTimeout(timeout)()
s.Freeze("localhost:40001")
started := time.Now()
session, err := mgo.DialWithTimeout("localhost:40001", timeout)
c.Assert(err, ErrorMatches, "no reachable servers")
c.Assert(session, IsNil)
c.Assert(started.Before(time.Now().Add(-timeout)), Equals, true)
c.Assert(started.After(time.Now().Add(-20*time.Second)), Equals, true)
}
func (s *S) TestSocketTimeoutOnInactiveSocket(c *C) {
if *fast {
c.Skip("-fast")
}
session, err := mgo.Dial("localhost:40001")
c.Assert(err, IsNil)
defer session.Close()
timeout := 2 * time.Second
session.SetSocketTimeout(timeout)
// Do something that relies on the timeout and works.
c.Assert(session.Ping(), IsNil)
// Freeze and wait for the timeout to go by.
s.Freeze("localhost:40001")
time.Sleep(timeout + 500*time.Millisecond)
s.Thaw("localhost:40001")
// Do something again. The timeout above should not have killed
// the socket as there was nothing to be done.
c.Assert(session.Ping(), IsNil)
}
func (s *S) TestDirect(c *C) {
session, err := mgo.Dial("localhost:40012?connect=direct")
c.Assert(err, IsNil)
defer session.Close()
// We know that server is a slave.
session.SetMode(mgo.Monotonic, true)
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40012"), Equals, true)
stats := mgo.GetStats()
c.Assert(stats.SocketsAlive, Equals, 1)
c.Assert(stats.SocketsInUse, Equals, 1)
c.Assert(stats.SocketRefs, Equals, 1)
// We've got no master, so it'll timeout.
session.SetSyncTimeout(5e8 * time.Nanosecond)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"test": 1})
c.Assert(err, ErrorMatches, "no reachable servers")
// Writing to the local database is okay.
coll = session.DB("local").C("mycoll")
defer coll.RemoveAll(nil)
id := bson.NewObjectId()
err = coll.Insert(M{"_id": id})
c.Assert(err, IsNil)
// Data was stored in the right server.
n, err := coll.Find(M{"_id": id}).Count()
c.Assert(err, IsNil)
c.Assert(n, Equals, 1)
// Server hasn't changed.
result.Host = ""
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40012"), Equals, true)
}
func (s *S) TestDirectToUnknownStateMember(c *C) {
session, err := mgo.Dial("localhost:40041?connect=direct")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Monotonic, true)
result := &struct{ Host string }{}
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40041"), Equals, true)
// We've got no master, so it'll timeout.
session.SetSyncTimeout(5e8 * time.Nanosecond)
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(M{"test": 1})
c.Assert(err, ErrorMatches, "no reachable servers")
// Slave is still reachable.
result.Host = ""
err = session.Run("serverStatus", result)
c.Assert(err, IsNil)
c.Assert(strings.HasSuffix(result.Host, ":40041"), Equals, true)
}
func (s *S) TestFailFast(c *C) {
info := mgo.DialInfo{
Addrs: []string{"localhost:99999"},
Timeout: 5 * time.Second,
FailFast: true,
}
started := time.Now()
_, err := mgo.DialWithInfo(&info)
c.Assert(err, ErrorMatches, "no reachable servers")
c.Assert(started.After(time.Now().Add(-time.Second)), Equals, true)
}
type OpCounters struct {
Insert int
Query int
Update int
Delete int
GetMore int
Command int
}
func getOpCounters(server string) (c *OpCounters, err error) {
session, err := mgo.Dial(server + "?connect=direct")
if err != nil {
return nil, err
}
defer session.Close()
session.SetMode(mgo.Monotonic, true)
result := struct{ OpCounters }{}
err = session.Run("serverStatus", &result)
return &result.OpCounters, err
}
func (s *S) TestMonotonicSlaveOkFlagWithMongos(c *C) {
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
ssresult := &struct{ Host string }{}
imresult := &struct{ IsMaster bool }{}
// Figure the master while still using the strong session.
err = session.Run("serverStatus", ssresult)
c.Assert(err, IsNil)
err = session.Run("isMaster", imresult)
c.Assert(err, IsNil)
master := ssresult.Host
c.Assert(imresult.IsMaster, Equals, true, Commentf("%s is not the master", master))
// Collect op counters for everyone.
opc21a, err := getOpCounters("localhost:40021")
c.Assert(err, IsNil)
opc22a, err := getOpCounters("localhost:40022")
c.Assert(err, IsNil)
opc23a, err := getOpCounters("localhost:40023")
c.Assert(err, IsNil)
// Do a SlaveOk query through MongoS
mongos, err := mgo.Dial("localhost:40202")
c.Assert(err, IsNil)
defer mongos.Close()
mongos.SetMode(mgo.Monotonic, true)
coll := mongos.DB("mydb").C("mycoll")
result := &struct{}{}
for i := 0; i != 5; i++ {
err := coll.Find(nil).One(result)
c.Assert(err, Equals, mgo.ErrNotFound)
}
// Collect op counters for everyone again.
opc21b, err := getOpCounters("localhost:40021")
c.Assert(err, IsNil)
opc22b, err := getOpCounters("localhost:40022")
c.Assert(err, IsNil)
opc23b, err := getOpCounters("localhost:40023")
c.Assert(err, IsNil)
masterPort := master[strings.Index(master, ":")+1:]
var masterDelta, slaveDelta int
switch masterPort {
case "40021":
masterDelta = opc21b.Query - opc21a.Query
slaveDelta = (opc22b.Query - opc22a.Query) + (opc23b.Query - opc23a.Query)
case "40022":
masterDelta = opc22b.Query - opc22a.Query
slaveDelta = (opc21b.Query - opc21a.Query) + (opc23b.Query - opc23a.Query)
case "40023":
masterDelta = opc23b.Query - opc23a.Query
slaveDelta = (opc21b.Query - opc21a.Query) + (opc22b.Query - opc22a.Query)
default:
c.Fatal("Uh?")
}
c.Check(masterDelta, Equals, 0) // Just the counting itself.
c.Check(slaveDelta, Equals, 5) // The counting for both, plus 5 queries above.
}
func (s *S) TestRemovalOfClusterMember(c *C) {
if *fast {
c.Skip("-fast")
}
master, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer master.Close()
// Wait for cluster to fully sync up.
for i := 0; i < 10; i++ {
if len(master.LiveServers()) == 3 {
break
}
time.Sleep(5e8)
}
if len(master.LiveServers()) != 3 {
c.Fatalf("Test started with bad cluster state: %v", master.LiveServers())
}
result := &struct {
IsMaster bool
Me string
}{}
slave := master.Copy()
slave.SetMode(mgo.Monotonic, true) // Monotonic can hold a non-master socket persistently.
err = slave.Run("isMaster", result)
c.Assert(err, IsNil)
c.Assert(result.IsMaster, Equals, false)
slaveAddr := result.Me
defer func() {
master.Refresh()
master.Run(bson.D{{"$eval", `rs.add("` + slaveAddr + `")`}}, nil)
master.Close()
slave.Close()
}()
c.Logf("========== Removing slave: %s ==========", slaveAddr)
master.Run(bson.D{{"$eval", `rs.remove("` + slaveAddr + `")`}}, nil)
err = master.Ping()
c.Assert(err, Equals, io.EOF)
master.Refresh()
// Give the cluster a moment to catch up by doing a roundtrip to the master.
err = master.Ping()
c.Assert(err, IsNil)
time.Sleep(3e9)
// This must fail since the slave has been taken off the cluster.
err = slave.Ping()
c.Assert(err, NotNil)
for i := 0; i < 15; i++ {
if len(master.LiveServers()) == 2 {
break
}
time.Sleep(time.Second)
}
live := master.LiveServers()
if len(live) != 2 {
c.Errorf("Removed server still considered live: %#s", live)
}
c.Log("========== Test succeeded. ==========")
}
func (s *S) TestSocketLimit(c *C) {
if *fast {
c.Skip("-fast")
}
const socketLimit = 64
restore := mgo.HackSocketsPerServer(socketLimit)
defer restore()
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
stats := mgo.GetStats()
for stats.MasterConns+stats.SlaveConns != 3 {
stats = mgo.GetStats()
c.Log("Waiting for all connections to be established...")
time.Sleep(5e8)
}
c.Assert(stats.SocketsAlive, Equals, 3)
// Consume the whole limit for the master.
var master []*mgo.Session
for i := 0; i < socketLimit; i++ {
s := session.Copy()
defer s.Close()
err := s.Ping()
c.Assert(err, IsNil)
master = append(master, s)
}
before := time.Now()
go func() {
time.Sleep(3e9)
master[0].Refresh()
}()
// Now a single ping must block, since it would need another
// connection to the master, over the limit. Once the goroutine
// above releases its socket, it should move on.
session.Ping()
delay := time.Now().Sub(before)
c.Assert(delay > 3e9, Equals, true)
c.Assert(delay < 6e9, Equals, true)
}
func (s *S) TestSetModeEventualIterBug(c *C) {
session1, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session1.Close()
session1.SetMode(mgo.Eventual, false)
coll1 := session1.DB("mydb").C("mycoll")
const N = 100
for i := 0; i < N; i++ {
err = coll1.Insert(M{"_id": i})
c.Assert(err, IsNil)
}
c.Logf("Waiting until secondary syncs")
for {
n, err := coll1.Count()
c.Assert(err, IsNil)
if n == N {
c.Logf("Found all")
break
}
}
session2, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session2.Close()
session2.SetMode(mgo.Eventual, false)
coll2 := session2.DB("mydb").C("mycoll")
i := 0
iter := coll2.Find(nil).Batch(10).Iter()
var result struct{}
for iter.Next(&result) {
i++
}
c.Assert(iter.Close(), Equals, nil)
c.Assert(i, Equals, N)
}
func (s *S) TestCustomDialOld(c *C) {
dials := make(chan bool, 16)
dial := func(addr net.Addr) (net.Conn, error) {
tcpaddr, ok := addr.(*net.TCPAddr)
if !ok {
return nil, fmt.Errorf("unexpected address type: %T", addr)
}
dials <- true
return net.DialTCP("tcp", nil, tcpaddr)
}
info := mgo.DialInfo{
Addrs: []string{"localhost:40012"},
Dial: dial,
}
// Use hostname here rather than IP, to make things trickier.
session, err := mgo.DialWithInfo(&info)
c.Assert(err, IsNil)
defer session.Close()
const N = 3
for i := 0; i < N; i++ {
select {
case <-dials:
case <-time.After(5 * time.Second):
c.Fatalf("expected %d dials, got %d", N, i)
}
}
select {
case <-dials:
c.Fatalf("got more dials than expected")
case <-time.After(100 * time.Millisecond):
}
}
func (s *S) TestCustomDialNew(c *C) {
dials := make(chan bool, 16)
dial := func(addr *mgo.ServerAddr) (net.Conn, error) {
dials <- true
if addr.TCPAddr().Port == 40012 {
c.Check(addr.String(), Equals, "localhost:40012")
}
return net.DialTCP("tcp", nil, addr.TCPAddr())
}
info := mgo.DialInfo{
Addrs: []string{"localhost:40012"},
DialServer: dial,
}
// Use hostname here rather than IP, to make things trickier.
session, err := mgo.DialWithInfo(&info)
c.Assert(err, IsNil)
defer session.Close()
const N = 3
for i := 0; i < N; i++ {
select {
case <-dials:
case <-time.After(5 * time.Second):
c.Fatalf("expected %d dials, got %d", N, i)
}
}
select {
case <-dials:
c.Fatalf("got more dials than expected")
case <-time.After(100 * time.Millisecond):
}
}
func (s *S) TestPrimaryShutdownOnAuthShard(c *C) {
if *fast {
c.Skip("-fast")
}
// Dial the shard.
session, err := mgo.Dial("localhost:40203")
c.Assert(err, IsNil)
defer session.Close()
// Login and insert something to make it more realistic.
session.DB("admin").Login("root", "rapadura")
coll := session.DB("mydb").C("mycoll")
err = coll.Insert(bson.M{"n": 1})
c.Assert(err, IsNil)
// Dial the replica set to figure the master out.
rs, err := mgo.Dial("root:rapadura@localhost:40031")
c.Assert(err, IsNil)
defer rs.Close()
// With strong consistency, this will open a socket to the master.
result := &struct{ Host string }{}
err = rs.Run("serverStatus", result)
c.Assert(err, IsNil)
// Kill the master.
host := result.Host
s.Stop(host)
// This must fail, since the connection was broken.
err = rs.Run("serverStatus", result)
c.Assert(err, Equals, io.EOF)
// This won't work because the master just died.
err = coll.Insert(bson.M{"n": 2})
c.Assert(err, NotNil)
// Refresh session and wait for re-election.
session.Refresh()
for i := 0; i < 60; i++ {
err = coll.Insert(bson.M{"n": 3})
if err == nil {
break
}
c.Logf("Waiting for replica set to elect a new master. Last error: %v", err)
time.Sleep(500 * time.Millisecond)
}
c.Assert(err, IsNil)
count, err := coll.Count()
c.Assert(count > 1, Equals, true)
}
func (s *S) TestNearestSecondary(c *C) {
defer mgo.HackPingDelay(3 * time.Second)()
rs1a := "127.0.0.1:40011"
rs1b := "127.0.0.1:40012"
rs1c := "127.0.0.1:40013"
s.Freeze(rs1b)
session, err := mgo.Dial(rs1a)
c.Assert(err, IsNil)
defer session.Close()
// Wait for the sync up to run through the first couple of servers.
for len(session.LiveServers()) != 2 {
c.Log("Waiting for two servers to be alive...")
time.Sleep(100 * time.Millisecond)
}
// Extra delay to ensure the third server gets penalized.
time.Sleep(500 * time.Millisecond)
// Release third server.
s.Thaw(rs1b)
// Wait for it to come up.
for len(session.LiveServers()) != 3 {
c.Log("Waiting for all servers to be alive...")
time.Sleep(100 * time.Millisecond)
}
session.SetMode(mgo.Monotonic, true)
var result struct{ Host string }
// See which slave picks the line, several times to avoid chance.
for i := 0; i < 10; i++ {
session.Refresh()
err = session.Run("serverStatus", &result)
c.Assert(err, IsNil)
c.Assert(hostPort(result.Host), Equals, hostPort(rs1c))
}
if *fast {
// Don't hold back for several seconds.
return
}
// Now hold the other server for long enough to penalize it.
s.Freeze(rs1c)
time.Sleep(5 * time.Second)
s.Thaw(rs1c)
// Wait for the ping to be processed.
time.Sleep(500 * time.Millisecond)
// Repeating the test should now pick the former server consistently.
for i := 0; i < 10; i++ {
session.Refresh()
err = session.Run("serverStatus", &result)
c.Assert(err, IsNil)
c.Assert(hostPort(result.Host), Equals, hostPort(rs1b))
}
}
func (s *S) TestConnectCloseConcurrency(c *C) {
restore := mgo.HackPingDelay(500 * time.Millisecond)
defer restore()
var wg sync.WaitGroup
const n = 500
wg.Add(n)
for i := 0; i < n; i++ {
go func() {
defer wg.Done()
session, err := mgo.Dial("localhost:40001")
if err != nil {
c.Fatal(err)
}
time.Sleep(1)
session.Close()
}()
}
wg.Wait()
}
func (s *S) TestSelectServers(c *C) {
if !s.versionAtLeast(2, 2) {
c.Skip("read preferences introduced in 2.2")
}
session, err := mgo.Dial("localhost:40011")
c.Assert(err, IsNil)
defer session.Close()
session.SetMode(mgo.Eventual, true)
var result struct{ Host string }
session.Refresh()
session.SelectServers(bson.D{{"rs1", "b"}})
err = session.Run("serverStatus", &result)
c.Assert(err, IsNil)
c.Assert(hostPort(result.Host), Equals, "40012")
session.Refresh()
session.SelectServers(bson.D{{"rs1", "c"}})
err = session.Run("serverStatus", &result)
c.Assert(err, IsNil)
c.Assert(hostPort(result.Host), Equals, "40013")
}
func (s *S) TestSelectServersWithMongos(c *C) {
if !s.versionAtLeast(2, 2) {
c.Skip("read preferences introduced in 2.2")
}
session, err := mgo.Dial("localhost:40021")
c.Assert(err, IsNil)
defer session.Close()
ssresult := &struct{ Host string }{}
imresult := &struct{ IsMaster bool }{}
// Figure the master while still using the strong session.
err = session.Run("serverStatus", ssresult)
c.Assert(err, IsNil)
err = session.Run("isMaster", imresult)
c.Assert(err, IsNil)
master := ssresult.Host
c.Assert(imresult.IsMaster, Equals, true, Commentf("%s is not the master", master))
var slave1, slave2 string
switch hostPort(master) {
case "40021":
slave1, slave2 = "b", "c"
case "40022":
slave1, slave2 = "a", "c"
case "40023":
slave1, slave2 = "a", "b"
}
// Collect op counters for everyone.
opc21a, err := getOpCounters("localhost:40021")
c.Assert(err, IsNil)
opc22a, err := getOpCounters("localhost:40022")
c.Assert(err, IsNil)
opc23a, err := getOpCounters("localhost:40023")
c.Assert(err, IsNil)
// Do a SlaveOk query through MongoS
mongos, err := mgo.Dial("localhost:40202")
c.Assert(err, IsNil)
defer mongos.Close()
mongos.SetMode(mgo.Monotonic, true)
mongos.Refresh()
mongos.SelectServers(bson.D{{"rs2", slave1}})
coll := mongos.DB("mydb").C("mycoll")
result := &struct{}{}
for i := 0; i != 5; i++ {
err := coll.Find(nil).One(result)
c.Assert(err, Equals, mgo.ErrNotFound)
}
mongos.Refresh()
mongos.SelectServers(bson.D{{"rs2", slave2}})
coll = mongos.DB("mydb").C("mycoll")
for i := 0; i != 7; i++ {
err := coll.Find(nil).One(result)
c.Assert(err, Equals, mgo.ErrNotFound)
}
// Collect op counters for everyone again.
opc21b, err := getOpCounters("localhost:40021")
c.Assert(err, IsNil)
opc22b, err := getOpCounters("localhost:40022")
c.Assert(err, IsNil)
opc23b, err := getOpCounters("localhost:40023")
c.Assert(err, IsNil)
switch hostPort(master) {
case "40021":
c.Check(opc21b.Query-opc21a.Query, Equals, 0)
c.Check(opc22b.Query-opc22a.Query, Equals, 5)
c.Check(opc23b.Query-opc23a.Query, Equals, 7)
case "40022":
c.Check(opc21b.Query-opc21a.Query, Equals, 5)
c.Check(opc22b.Query-opc22a.Query, Equals, 0)
c.Check(opc23b.Query-opc23a.Query, Equals, 7)
case "40023":
c.Check(opc21b.Query-opc21a.Query, Equals, 5)
c.Check(opc22b.Query-opc22a.Query, Equals, 7)
c.Check(opc23b.Query-opc23a.Query, Equals, 0)
default:
c.Fatal("Uh?")
}
}
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