mongodb3.6集群部署

MongoDB分片集群由mongos路由进程（轻量级且非持久化进程）、复制集组成的片shards（分片一般基于复制集故障转移和冗余备份功能）、一组配置服务器（存储元数据信息，一般冗余3台）构成。

分片：shard1、shard2、shard3

配置：configsvr1、configsvr2、configsvr3

路由：mongos1，mongos2,mongos3

各个服务分布情况如下：

192.168.111.203：20001（shard1主节点）/20002（shard2仲裁点）/20003（shard3从节点）/20004（configsvr1）/30000(mongos1)

192.168.111.204：20001（shard1从节点）/20002（shard2主节点）/20003（shard3仲裁点）/20004(configsvr2)/30000(mongos2)

192.168.111.205：20001（shard1仲裁点）/20002（shard2从节点）/20003（shard3主节点）/20004(configsvr3)/30000(mongos3)

一、配置复制集群分片

1、在三台机子上分别建立如下目录：

存放shard1配置、数据、log目录

mkdir -p /data/mongodb/shard1/config

mkdir -p /data/mongodb/shard1/data

mkdir -p /data/mongodb/shard1/logs

存在shard2配置、数据、log目录

mkdir -p /data/mongodb/shard2/config

mkdir -p /data/mongodb/shard2/data

mkdir -p /data/mongodb/shard3/logs

存放shard3配置、数据、log目录

mkdir -p /data/mongodb/shard3/config

mkdir -p /data/mongodb/shard3/data

mkdir -p /data/mongodb/shard3/logs

2、配置分片1

1）shard1配置文件mongoshard.conf如下:

#mongodb.conf

#where to store the data.
dbpath = /data/mongodb/shard1/data

pidfilepath = /data/mongodb/shard1/mongod.pid

#where to log
logpath = /data/mongodb/shard1/logs/mongodb.log
#record logs with appending
logappend = true

bind_ip = 127.0.0.1,192.168.111.203
port = 20001

fork = true
maxConns = 500

#enable journaling
journal = true

smallfiles = true

#enables periodic logging of CPU utilization and I/O wait
#cpu = true

#turn on/off security.off is currently the default
#noauth = true
#auth = true

#verbose logging output.
#verbose = true

#inspect all client data for validity on receipt (useful for developing drivers)
#objcheck = true

#enable db quota management
#quota = true

#set oplogging level where n is
# 0=off(default)
# 1=W
# 2=R
# 3=both
# 7=W+some reads
#oplog = 0

#diagnostic/debugging option
#nocursors = true

#ignore query hints
#nohints = true

#turns off server-side scripting.this will result in greatly limited functionality
#noscripting = true

#turns off table scans.any query that would do a table scan fails.
#notablescan = true

#disable data file preallocation.
#noprealloc = true

#specify .ns file size for new databases.
#nssize =
#account token for mongo monitoring server.
#mms-token =

#server name for mongo monitoring server.
#mms-name =

#ping interval for mongo monitoring server.
#mms-interval =

# replication options

shardsvr = true
replSet = myshard1

#in replicated mongo databases,specify here whether this is a slave or master
#slave = true
#source = master.example.com
#slave only:specify a single database to replicate
#only = master.example.com
#or
#master = true
#source = slave.example.com
#address of a server to pair with.
#pairwith =
#address of arbiter server.
#arbiter =
#automatically resync if slave data is stale
#autoresync
#custom size for replication operation log.
oplogSize =  4096
#size limit for in_memory storage of op ids.
#opIdMem =

#SSL options
#enable SSL on normal ports
#sslOnNormalPorts = true
#SSL key file and password
#sslPEMKeyFile = /etc/ssl/mongodb.pem

#sslPEMKeyPassword = pass

此配置文件分别放入三台机器对应的分片1目录中，注意修改绑定IP为实际IP

2）启动服务器初始化复制集primary节点

mongod --config /data/mongodb/shard1/config/mongoshard.conf

在192.168.111.203上连接mongod

mongo --host=192.168.111.203 --port=20001

MongoDB Enterprise > use admin

初始化主节点

MongoDB Enterprise > rs.initiate({_id:'myshard1',members:[{_id:1,host:'192.168.111.203:20001'}]});

添加从节点

MongoDB Enterprise >rs.add('192.168.111.204:20001')

添加仲裁点

MongoDB Enterprise >rs.addArb('192.168.111.205:20001')

到此复制集myshard1添加完毕，可以用rs.status()查看复制集状态

3、利用同样的方法分别配置复制集myshard2、myshard3

二、配置配置服务器

1、分别在三台机器上建立如下文件夹

mkdir -p /data/mongodb/config/config

mkdir -p /data/mongodb/config/data

mkdir -p /data/mongodb/config/logs

建立配置文件cfgserver.conf:

#mongodb.conf

#where to store the data.
dbpath = /data/mongodb/config/data

pidfilepath = /data/mongodb/config/cfgserver.pid

#where to log
logpath = /data/mongodb/config/logs/mongodb.log
#record logs with appending
logappend = true

bind_ip = 127.0.0.1,192.168.111.203
port = 20004

fork = true
maxConns = 500

#enable journaling
journal = true

smallfiles = true

#enables periodic logging of CPU utilization and I/O wait
#cpu = true

#turn on/off security.off is currently the default
#noauth = true
#auth = true

#verbose logging output.
#verbose = true

#inspect all client data for validity on receipt (useful for developing drivers)
#objcheck = true

#enable db quota management
#quota = true

#set oplogging level where n is
# 0=off(default)
# 1=W
# 2=R
# 3=both
# 7=W+some reads
#oplog = 0

#diagnostic/debugging option
#nocursors = true

#ignore query hints
#nohints = true

#turns off server-side scripting.this will result in greatly limited functionality
#noscripting = true

#turns off table scans.any query that would do a table scan fails.
#notablescan = true

#disable data file preallocation.
#noprealloc = true

#specify .ns file size for new databases.
#nssize =
#account token for mongo monitoring server.
#mms-token =

#server name for mongo monitoring server.
#mms-name =

#ping interval for mongo monitoring server.
#mms-interval =

# replication options
replSet = cfgsvr
configsvr = true

oplogSize =  4096

2、此配置文件分别放入三台机器对应的配置服务器目录中，注意修改绑定IP为实际IP

3、启动并初始化配置服务器

分别启动三台配置服务器

mongod --config /data/mongodb/config/cfgserver.conf

mongo --host=192.168.111.240 --port=20004

cfgset:PRIMARY>rs.initiate({_id:"cfgsvr",members:[{_id:1,host:"192.168.111.203:20004"},{_id:2,host:"192.168.111.204:20004"},{_id:3,host:"192.168.111.205:20005"}]})

三、配置路由服务

1、在服务器上建立如下文件夹

mkdir -p /data/mongodb/mongos/logs

mkdir -p /data/mongodb/mongos/config

cd /data/mongodb/mongos/config下建立路由配置文件mongos.conf:

#mongodb.conf

pidfilepath = /data/mongodb/mongos/yowifi_route.pid

#where to log
logpath = /data/mongodb/mongos/logs/mongodb.log
#record logs with appending
logappend = true

bind_ip = 127.0.0.1,192.168.111.203
port = 30000

fork = true
maxConns = 500

configdb = cfgset/192.168.111.203:20004,192.168.111.204:20004,192.168.111.205:20004

2、此配置分别同步到三台mongos服务器上，注意绑定IP修改为对应的IP地址

3、登录到各mongos服务器，分别进行以下操作添加分片集

mongo --host=192.168.111.203 --port=30000

mongos>sh.addShard("yowifishard1/192.168.111.203:20001,192.168.111.240:20001,192.168.111.205:20001")

mongos>sh.addShard("yowifishard2/192.168.111.203:20002,192.168.111.240:20002,192.168.111.205:20002")

mongos>sh.addShard("yowifishard3/192.168.111.203:20003,192.168.111.240:20003,192.168.111.205:20003")

4、通过sh.status()检查配置是否正确

mongos>sh.status()

--- Sharding Status ---
  sharding version: {
      "_id" : 1,
      "minCompatibleVersion" : 5,
      "currentVersion" : 6,
      "clusterId" : ObjectId("5a9d0f053f5b23cc7007399b")
  }
  shards:
        {  "_id" : "yowifishard1",  "host" : "yowifishard1/192.168.111.203:20001,192.168.111.204:20001",  "state" : 1 }
        {  "_id" : "yowifishard2",  "host" : "yowifishard2/192.168.111.204:20002,192.168.111.205:20002",  "state" : 1 }
        {  "_id" : "yowifishard3",  "host" : "yowifishard3/192.168.111.203:20003,192.168.111.205:20003",  "state" : 1 }
  active mongoses:
        "3.6.3" : 3
  autosplit:
        Currently enabled: yes
  balancer:
        Currently enabled:  yes
        Currently running:  no
        Failed balancer rounds in last 5 attempts:  5
        Last reported error:  Could not find host matching read preference { mode: "primary" } for set yowifishard1
        Time of Reported error:  Tue Mar 06 2018 15:18:15 GMT+0800 (CST)
        Migration Results for the last 24 hours:
                No recent migrations
  databases:
        {  "_id" : "chavin",  "primary" : "yowifishard3",  "partitioned" : true }
                chavin.users
                        shard key: { "city" : 1 }
                        unique: false
                        balancing: true
                        chunks:
                                yowifishard3    1
                        { "city" : { "$minKey" : 1 } } -->> { "city" : { "$maxKey" : 1 } } on : yowifishard3 Timestamp(1, 0)
        {  "_id" : "config",  "primary" : "config",  "partitioned" : true }
                config.system.sessions
                        shard key: { "_id" : 1 }
                        unique: false
                        balancing: true
                        chunks:
                                yowifishard1    1
                        { "_id" : { "$minKey" : 1 } } -->> { "_id" : { "$maxKey" : 1 } } on : yowifishard1 Timestamp(1, 0)

至此，mongodb分片集群已经部署完毕