还没来得及写。我就知道一个月完毕不了，暂时添加的工作总是拖后腿。

。。

MySQL集群 docker下安装MySQL Cluster报错了。是我image的包少了perl。老实装吧。image又小不了了。还须要安装numactl, net-tools

error: Failed dependencies:
/usr/bin/perl is needed by MySQL-Cluster-server-gpl-7.4.10-1.el7.x86_64
libnuma.so.1()(64bit) is needed by MySQL-Cluster-server-gpl-7.4.10-1.el7.x86_64

-- continue---

192.168.2.54    Management Node

192.168.2.55    Data Node

192.168.2.56    Sql Node

---安装 Data Node----

mysql $ sudo rpm -Uhv MySQL-Cluster-server-gpl-7.4.10-1.el7.x86_64.rpm

成功安装后ndbd和ndbmtd应在已经在/usr/sbin文件夹中

---安装 Sql Node----

mysql $ sudo rpm -Uhv MySQL-Cluster-server-gpl-7.4.10-1.el7.x86_64.rpm

成功安装后mysqld应在已经位于/usr/sbin文件夹中,/usr/share/mysql中有mysql.server

假设要管理Sql Node，须要安装client。安装后/usr/bin/中有mysql

mysql $ sudo rpm -Uvh MySQL-Cluster-client-gpl-7.4.10-1.el7.x86_64.rpm

假设安装过程报错，则须要安装

FATAL ERROR: please install the following Perl modules before executing /usr/bin/mysql_install_db:
Data::Dumper

mysql $ sudo yum install -y perl-Data-Dumper

---安装Management Node----

mysql $ sudo rpm -Uhv MySQL-Cluster-server-gpl-7.4.10-1.el7.x86_64.rpm

安装后ndb_mgmd已经安装在/usr/sbin中，ndb_mgm管理客户端也已经成功安装

====================================================================

---初始配置cluster----

MySQL Cluster7.3+提供了auto-install的gui安装方式。后面我们会试一下

编辑配置文件，每一个Data Node或sql Node须要编辑my.cnf，提供连接字符信息，告诉节点怎样找到管理节点。另外告诉mysql server提供NDBCluster引擎

管理节点须要配置config.ini文件。说明须要维护多少复制，在每一个数据节点上有多少内存分配给数据和索引，怎样找到数据节点。每一个数据节点的数据保存在磁盘什么位置，怎样查找SQL节点

---配置数据节点和SQL节点----

mysql $ sudo mkdir -p /usr/local/mysql/data

mysql $ sudo chown -R mysq:mysq /usr/local/mysql/

mysql $ sudo vi /etc/my.cnf

[mysqld]

ndbcluster
[mysql_cluster]
ndb-connectstring=192.168.2.54  # 管理节点地址，别忘了防火墙关闭，检測ping通

两个节点都进行配置

注意，假设你启动了配置ndbcluster的mysqld进程，集群没有启动是不能运行create table和alter table语句的，为了保持一致性

---配置管理节点----

mysql $ sudo mkdir /var/lib/mysql-cluster  创建个文件夹保存配置

mysql $ sudo chown -R mysq:mysq /var/lib/mysql-cluster/

mysql $ sudo mkdir /usr/mysql-cluster

mysql $ sudo chown -R mysq:mysq /usr/mysql-cluster

mysql $ sudo vi /var/lib/mysql-cluster/config.ini

[ndbd default]
# Options affecting ndbd processes on all data nodes:
NoOfReplicas=2    # Number of replicas
DataMemory=80M    # How much memory to allocate for data storage
IndexMemory=18M   # How much memory to allocate for index storage
                  # For DataMemory and IndexMemory, we have used the
                  # default values. Since the "world" database takes up
                  # only about 500KB, this should be more than enough for
                  # this example Cluster setup.

[tcp default]
# TCP/IP options:
portnumber=2202   # This the default; however, you can use any
                  # port that is free for all the hosts in the cluster
                  # Note: It is recommended that you do not specify the port
                  # number at all and simply allow the default value to be used
                  # instead

[ndb_mgmd]
# Management process options:
hostname=192.168.2.54           # Hostname or IP address of MGM node
datadir=/var/lib/mysql-cluster  # Directory for MGM node log files

[ndbd]
# Options for data node "A":
                                # (one [ndbd] section per data node)
hostname=192.168.2.55           # Hostname or IP address
datadir=/usr/local/mysql/data   # Directory for this data node‘s data files

#[ndbd]
# Options for data node "B":
#hostname=192.168.0.40           # Hostname or IP address
#datadir=/usr/local/mysql/data   # Directory for this data node‘s data files

[mysqld]
# SQL node options:
hostname=192.168.2.56           # Hostname or IP address
                                # (additional mysqld connections can be
                                # specified for this node for various
                                # purposes such as running ndb_restore)

================================================

---初始化启动集群----

在管理节点，运行命令启动管理节点进程

mysql $ ndb_mgmd -f /var/lib/mysql-cluster/config.ini

MySQL Cluster Management Server mysql-5.6.28 ndb-7.4.10

假设启动出错在/var/lib/mysql-cluster文件夹中查看日志排除错误

在数据节点。运行命令启动

mysql $ ndbd

[mysq@mysqlserver ~]$ ndbd
2016-04-21 10:01:37 [ndbd] INFO     -- Angel connected to ‘192.168.2.54:1186‘
2016-04-21 10:01:37 [ndbd] INFO     -- Angel allocated nodeid: 2

在管理节点上查看状态

mysql $ ndb_mgm

ndb_mgm> SHOW      查看节点状态，假设没有可用节点，则会每五秒尝试一次

[mysql ~]$ ndb_mgm
-- NDB Cluster -- Management Client --
ndb_mgm> show
Connected to Management Server at: localhost:1186
Cluster Configuration
---------------------
[ndbd(NDB)] 1 node(s)
id=2 @192.168.2.55  (mysql-5.6.28 ndb-7.4.10, Nodegroup: 0, *)


[ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.2.54  (mysql-5.6.28 ndb-7.4.10)


[mysqld(API)] 1 node(s)
id=3 (not connected, accepting connect from 192.168.2.56)

启动SQL节点

由于是新安装的，运行mysqld会报错

须要先installdb

mysql $ mysql_install_db --user=mysql

mysql $ mysqld &   使用你习惯的daemon方式运行 

============查看状态=============

Cluster Configuration
---------------------
[ndbd(NDB)] 1 node(s)
id=2 @192.168.2.55  (mysql-5.6.28 ndb-7.4.10, Nodegroup: 0, *)


[ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.2.54  (mysql-5.6.28 ndb-7.4.10)


[mysqld(API)] 1 node(s)
id=3 @192.168.2.56  (mysql-5.6.28 ndb-7.4.10)