Can not intergrate API node with NDB Management

[quan nguyen]

2 have 3 machines and their role in cluster are:
- node 1: installed ndb cluster management and mysqld service.
- node 2 and node 3 are installed ndbd.

After manual configuration I can start ndbd and ndbd_mgm successfully, but when I start mysqld, I got an error like this:

Job for mysqld.service failed because the control process exited with error code. See "systemctl status mysqld.service" and "journalctl -xe" for details.

Sep 06 17:36:27 mnp-db01 mysqld_pre_systemd[12376]: 2017-09-06T10:36:27.048217Z 0 [Warning] TIMESTAMP with implicit DEFAULT value is deprecated. Please use --explicit_defaults_f...e details).
Sep 06 17:36:27 mnp-db01 mysqld_pre_systemd[12376]: 2017-09-06T10:36:27.050446Z 0 [ERROR] --initialize specified but the data directory has files in it. Aborting.
Sep 06 17:36:27 mnp-db01 mysqld_pre_systemd[12376]: 2017-09-06T10:36:27.050469Z 0 [ERROR] Aborting

Those are configurations of ndbd and mysqld on node 01.

>>>>> NDBD:

[ndbd default]
NoOfReplicas=2
DataMemory=80M
IndexMemory=18M
ServerPort=2202
[ndb_mgmd]
HostName=mnp-db01
DataDir=/mysql/cluster
[ndbd]
HostName=mnp-db02
NodeId=2
DataDir=/mysql/data
[ndbd]
HostName=mnp-db03
NodeId=3
DataDir=/mysql/data
[mysqld]
HostName=mnp-db01


>>>>> MYSQLD:

[mysqld]
ndbcluster
socket=/mysql/node/mysql.sock
log-error=/mysql/node/log/mysqld.log
pid-file=/mysql/run/mysqld/mysqld.pid

[mysql_cluster]
ndb-connectstring=mnp-db01