[root@NDB1 bin]# ./ndbd --initial
Unable to connect with connect string: nodeid=0,localhost:1186
Retrying every 5 seconds. Attempts left: 12 11 10 9 8 7 6 5 4 3 2 1, failed.
2016-04-03 06:33:35 [ndbd] ERROR -- Could not connect to management server, error: ''
MGM节点配置如下：
vi config.ini
[ndbd default]
NoOfReplicas=2
DataMemory=200M
IndexMemory=30M
[ndb_mgmd]
NodeId=1
hostname=192.168.137.102
datadir=/var/lib/mysql-cluster/_
[ndbd]
NodeId=2
hostname=192.168.137.101
datadir=/usr/local/mysql/data
[ndbd]
NodeId=3
hostname=192.168.137.103
datadir=/usr/local/mysql/data
[mysqld]
NodeId=4
hostname=192.168.137.104
[mysqld]
NodeId=5
hostname=192.168.137.105
[mysqld]
NodeId=6
MGM启动正常：
[root@MGM bin]# ./ndb_mgm
-- NDB Cluster -- Management Client --
ndb_mgm> show
Connected to Management Server at: localhost:1186
[ndbd(NDB)] 2 node(s)
id=2 (not connected, accepting connect from 192.168.137.101)
id=3 (not connected, accepting connect from 192.168.137.103)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.137.102 (mysql-5.6.28 ndb-7.4.10)
[mysqld(API)] 3 node(s)
id=4 (not connected, accepting connect from 192.168.137.104)
id=5 (not connected, accepting connect from 192.168.137.105)
id=6 (not connected, accepting connect from any host)
但启动数据节点报错：
[root@NDB1 bin]# ./ndbd --initial
Unable to connect with connect string: nodeid=0,localhost:1186
Retrying every 5 seconds. Attempts left: 12 11 10 9 8 7 6 5 4 3 2 1, failed.
2016-04-03 06:33:35 [ndbd] ERROR -- Could not connect to management server, error: ''
在数据节点connect管理节点没有问题：
[root@NDB1 bin]# ./ndb_mgm
-- NDB Cluster -- Management Client --
ndb_mgm> connect 192.168.137.102
Connected to Management Server at: 192.168.137.102:1186
ndb_mgm> show
[ndbd(NDB)] 2 node(s)
id=2 (not connected, accepting connect from 192.168.137.101)
id=3 (not connected, accepting connect from 192.168.137.103)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.137.102 (mysql-5.6.28 ndb-7.4.10)
[mysqld(API)] 3 node(s)
id=4 (not connected, accepting connect from 192.168.137.104)
id=5 (not connected, accepting connect from 192.168.137.105)
id=6 (not connected, accepting connect from any host)
补充： 防火墙都是关闭的
数据节点指定管理节点地址登录成功了，在管理端也能使用ndb_mgm工具做停止，但不能用ndb_mgm做启动，不知道为何
ndbd -c 192.168.137.102
2016-04-03 18:05:13 [ndbd] INFO -- Angel connected to '192.168.137.102:1186'
2016-04-03 18:05:13 [ndbd] INFO -- Angel allocated nodeid: 2
ndb_mgm> show
Connected to Management Server at: localhost:1186
[ndbd(NDB)] 2 node(s)
id=2 @192.168.137.101 (mysql-5.6.28 ndb-7.4.10, starting, Nodegroup: 0)
id=3 (not connected, accepting connect from 192.168.137.103)
[ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.137.102 (mysql-5.6.28 ndb-7.4.10)
[mysqld(API)] 3 node(s)
id=4 (not connected, accepting connect from 192.168.137.104)
id=5 (not connected, accepting connect from 192.168.137.105)
id=6 (not connected, accepting connect from any host)
ndb_mgm> 2 stop
Node 2: Node shutdown initiated
Node 2 has shutdown.
ndb_mgm> Node 2: Node shutdown completed.
ndb_mgm> 2 start
Start failed.