Golang mgo.Dial函數代碼示例

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:[email protected]: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) 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) 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) 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) 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) 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")

	// Slave is still reachable.
	result.Host = ""
	err = session.Run("serverStatus", result)
	c.Assert(err, IsNil)
	c.Assert(strings.HasSuffix(result.Host, ":40012"), Equals, true)
}

func (s *S) TestAuthAddUserReplaces(c *C) {
	session, err := mgo.Dial("localhost:40002")
	c.Assert(err, IsNil)
	defer session.Close()

	admindb := session.DB("admin")
	err = admindb.Login("root", "rapadura")
	c.Assert(err, IsNil)

	mydb := session.DB("mydb")
	err = mydb.AddUser("myuser", "myoldpass", false)
	c.Assert(err, IsNil)
	err = mydb.AddUser("myuser", "mynewpass", true)
	c.Assert(err, IsNil)

	admindb.Logout()

	err = mydb.Login("myuser", "myoldpass")
	c.Assert(err, ErrorMatches, "auth fails")
	err = mydb.Login("myuser", "mynewpass")
	c.Assert(err, IsNil)

	// ReadOnly flag was changed too.
	err = mydb.C("mycoll").Insert(M{"n": 1})
	c.Assert(err, ErrorMatches, "unauthorized")
}

func (s *S) TestAuthAddUser(c *C) {
	session, err := mgo.Dial("localhost:40002")
	c.Assert(err, IsNil)
	defer session.Close()

	admindb := session.DB("admin")
	err = admindb.Login("root", "rapadura")
	c.Assert(err, IsNil)

	mydb := session.DB("mydb")
	err = mydb.AddUser("myruser", "mypass", true)
	c.Assert(err, IsNil)
	err = mydb.AddUser("mywuser", "mypass", false)
	c.Assert(err, IsNil)

	err = mydb.Login("myruser", "mypass")
	c.Assert(err, IsNil)

	admindb.Logout()

	coll := session.DB("mydb").C("mycoll")
	err = coll.Insert(M{"n": 1})
	c.Assert(err, ErrorMatches, "unauthorized")

	err = mydb.Login("mywuser", "mypass")
	c.Assert(err, IsNil)

	err = coll.Insert(M{"n": 1})
	c.Assert(err, IsNil)
}

func (s *S) TestAuthLoginSwitchUser(c *C) {
	session, err := mgo.Dial("localhost:40002")
	c.Assert(err, IsNil)
	defer session.Close()

	admindb := session.DB("admin")
	err = admindb.Login("root", "rapadura")
	c.Assert(err, IsNil)

	coll := session.DB("mydb").C("mycoll")
	err = coll.Insert(M{"n": 1})
	c.Assert(err, IsNil)

	err = admindb.Login("reader", "rapadura")
	c.Assert(err, IsNil)

	// Can't write.
	err = coll.Insert(M{"n": 1})
	c.Assert(err, ErrorMatches, "unauthorized")

	// But can read.
	result := struct{ N int }{}
	err = coll.Find(nil).One(&result)
	c.Assert(err, IsNil)
	c.Assert(result.N, Equals, 1)
}

func (s *S) TestAuthLoginLogout(c *C) {
	// Test both with a normal database and with an authenticated shard.
	for _, addr := range []string{"localhost:40002", "localhost:40203"} {
		session, err := mgo.Dial(addr)
		c.Assert(err, IsNil)
		defer session.Close()

		admindb := session.DB("admin")
		err = admindb.Login("root", "rapadura")
		c.Assert(err, IsNil)

		admindb.Logout()

		coll := session.DB("mydb").C("mycoll")
		err = coll.Insert(M{"n": 1})
		c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized .*")

		// Must have dropped auth from the session too.
		session = session.Copy()
		defer session.Close()

		coll = session.DB("mydb").C("mycoll")
		err = coll.Insert(M{"n": 1})
		c.Assert(err, ErrorMatches, "unauthorized|need to login|not authorized .*")
	}
}

func (s *S) TestAuthUpserUserOtherDBRoles(c *C) {
	if !s.versionAtLeast(2, 4) {
		c.Skip("UpsertUser only works on 2.4+")
	}
	session, err := mgo.Dial("localhost:40002")
	c.Assert(err, IsNil)
	defer session.Close()

	admindb := session.DB("admin")
	err = admindb.Login("root", "rapadura")
	c.Assert(err, IsNil)

	ruser := &mgo.User{
		Username:     "myruser",
		Password:     "mypass",
		OtherDBRoles: map[string][]mgo.Role{"mydb": []mgo.Role{mgo.RoleRead}},
	}

	err = admindb.UpsertUser(ruser)
	c.Assert(err, IsNil)
	defer admindb.RemoveUser("myruser")

	admindb.Logout()
	err = admindb.Login("myruser", "mypass")

	coll := session.DB("mydb").C("mycoll")
	err = coll.Insert(M{"n": 1})
	c.Assert(err, ErrorMatches, "unauthorized|not authorized .*")

	err = coll.Find(nil).One(nil)
	c.Assert(err, Equals, mgo.ErrNotFound)
}

func (s *S) TestAuthLoginChangePassword(c *C) {
	session, err := mgo.Dial("localhost:40002")
	c.Assert(err, IsNil)
	defer session.Close()

	admindb := session.DB("admin")
	err = admindb.Login("root", "rapadura")
	c.Assert(err, IsNil)

	mydb := session.DB("mydb")
	err = mydb.AddUser("myuser", "myoldpass", false)
	c.Assert(err, IsNil)

	err = mydb.Login("myuser", "myoldpass")
	c.Assert(err, IsNil)

	err = mydb.AddUser("myuser", "mynewpass", true)
	c.Assert(err, IsNil)

	err = mydb.Login("myuser", "mynewpass")
	c.Assert(err, IsNil)

	admindb.Logout()

	// The second login must be in effect, which means read-only.
	err = mydb.C("mycoll").Insert(M{"n": 1})
	c.Assert(err, ErrorMatches, "unauthorized")
}

func (s *S) TestGridFSRemove(c *C) {
	session, err := mgo.Dial("localhost:40011")
	c.Assert(err, IsNil)
	defer session.Close()

	db := session.DB("mydb")

	gfs := db.GridFS("fs")

	file, err := gfs.Create("myfile.txt")
	c.Assert(err, IsNil)
	file.Write([]byte{'1'})
	file.Close()

	file, err = gfs.Create("myfile.txt")
	c.Assert(err, IsNil)
	file.Write([]byte{'2'})
	file.Close()

	err = gfs.Remove("myfile.txt")
	c.Assert(err, IsNil)

	_, err = gfs.Open("myfile.txt")
	c.Assert(err == mgo.ErrNotFound, Equals, true)

	n, err := db.C("fs.chunks").Find(nil).Count()
	c.Assert(err, IsNil)
	c.Assert(n, Equals, 0)
}

func (s *S) TestGridFSOpen(c *C) {
	session, err := mgo.Dial("localhost:40011")
	c.Assert(err, IsNil)
	defer session.Close()

	db := session.DB("mydb")

	gfs := db.GridFS("fs")

	file, err := gfs.Create("myfile.txt")
	c.Assert(err, IsNil)
	file.Write([]byte{'1'})
	file.Close()

	file, err = gfs.Create("myfile.txt")
	c.Assert(err, IsNil)
	file.Write([]byte{'2'})
	file.Close()

	file, err = gfs.Open("myfile.txt")
	c.Assert(err, IsNil)
	defer file.Close()

	var b [1]byte

	_, err = file.Read(b[:])
	c.Assert(err, IsNil)
	c.Assert(string(b[:]), Equals, "2")
}

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)

	// 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)
}