一、yum安装
1、到阿里云源下载最新rpm安装包到服务器安装
#wget https://mirrors.aliyun.com/mongodb/yum/redhat/7/mongodb-org/4.0/x86_64/RPMS/mongodb-org-server-4.0.1-1.el7.x86_64.rpm
#rpm -ivh mongodb-org-*.rpm
#systemctl start mongod #启动mongod服务
#systemctl enable mongod #设置开机启动
相关文件路径
二、二进制安装
1、下载二进制安装包解压安装
#wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel70-4.0.1.tgz
#tar -zxvf mongodb-linux-x86_64-rhel70-4.0.1.tgz
#mv mongodb-linux-x86_64-rhel70-4.0.1 /usr/local/mongodb
#cd /usr/local/mongodb
#mkdir -pv {conf,log,data/db1} #创建配置文件、日志、数据目录
# echo "export PATH=$PATH:/usr/local/mongodb/bin" > /etc/profile.d/mongodb.sh #设置环境变量
#source /etc/profile #让环境变量生效
#useradd mongod -s /bin/false #新建MongoDB运行账户
#chown -R mongod:mongod /usr/local/mongodb/ #更改mongod目录用户和属组
2、新建配置文件mongodb.conf
#vim /usr/local/mongodb/conf/mongodb.conf
# mongod.conf
# for documentation of all options, see:
# http://docs.mongodb.org/manual/reference/configuration-options/
# where to write logging data.
systemLog:
destination: file
logAppend: true
path: /usr/local/mongodb/log/mongod-log-1.log
# Where and how to store data.
storage:
dbPath: /usr/local/mongodb/data/db1
journal:
enabled: true
# engine:
# mmapv1:
# wiredTiger:
# how the process runs
processManagement:
fork: true # fork and run in background
pidFilePath: /usr/local/mongodb/mongod.pid # location of pidfile
timeZoneInfo: /usr/share/zoneinfo
# network interfaces
net:
port: 27017
bindIp: master # Enter 0.0.0.0,:: to bind to all IPv4 and IPv6 addresses or, alternatively, use the net.bindIpAll setting.
#security:
#operationProfiling:
#replication:
#sharding:
## Enterprise-Only Options
#auditLog:
#snmp:
3、新建service服务文件
#vim /usr/lib/systemd/system/mongod.service
[Unit]
Description=MongoDB Database Server
After=network.target
Documentation=https://docs.mongodb.org/manual
[Service]
User=mongod
Group=mongod
Environment="OPTIONS=-f /usr/local/mongodb/conf/mongodb.conf"
ExecStart=/usr/local/mongodb/bin/mongod $OPTIONS
PermissionsStartOnly=true
PIDFile=/usr/local/mongodb/mongod.pid
Type=forking
# file size
LimitFSIZE=infinity
# cpu time
LimitCPU=infinity
# virtual memory size
LimitAS=infinity
# open files
LimitNOFILE=64000
# processes/threads
LimitNPROC=64000
# locked memory
LimitMEMLOCK=infinity
# total threads (user+kernel)
TasksMax=infinity
TasksAccounting=false
# Recommended limits for for mongod as specified in
# http://docs.mongodb.org/manual/reference/ulimit/#recommended-settings
[Install]
WantedBy=multi-user.target
4、设置内核参数
#echo 0 > /proc/sys/vm/zone_reclaim_mode
#sysctl -w vm.zone_reclaim_mode=0 #永久设置
#echo never > /sys/kernel/mm/transparent_hugepage/enabled
#echo never > /sys/kernel/mm/transparent_hugepage/defrag
5、启动测试
#systemctl start mongod #启动服务
#systemctl enable mongod #设置开机启动
三、副本集配置
Master 192.168.133.128
Node1 192.168.133.129
Node2 192.168.133.130
1、三节点分别设置hosts
#cat <<EOF >> /etc/hosts
192.168.133.128 master
192.168.133.129 node1
192.168.133.130 node2
EOF
2、编辑配置文件
#Vim /etc/mongod.conf #所有节点配置文件添加如下两行
replication:
replSetName: rs1
#systemctl restart mongod #重启服务让配置生效
3、连接master节点MongoDB
# mongo --host=master
>use admin
>rs.initiate() #初始化副本集
>rs.conf() #确认设定
>rs.add(‘node1:27017’) #添加node1到rs1副本集
>rs.add({host:’node2:27017’,priority:5}) #添加node2到rs1副本集,并设置priority优先级为5
>rs.conf() #确认设定
>rs.status() #查看状态
设置priority优先级
>var config = rs.config()
>config.members[0].priority=6
>rs.reconfig(config) //重新更新配置
删除节点
>rs.remove(‘node1:27017’)
4、数据同步测试
a. 在主库插入数据
rs1:PRIMARY> db.user.insert({"姓名":"张三","年龄":20,"性别":"男"})
rs1:PRIMARY> db.user.find()
{ "_id" : ObjectId("5b7bca2a40d8bd576c4e3c54"), "姓名" : "张三", "年龄" : 20, "性别" : "男" }
b.登陆从节点查询数据
# mongo --host=node1
rs1:SECONDARY>use admin
rs1:SECONDARY>rs.slaveOk() #开启从库读取
rs1:SECONDARY> db.user.find()
{ "_id" : ObjectId("5b7bca2a40d8bd576c4e3c54"), "姓名" : "张三", "年龄" : 20, "性别" : "男" }
5、故障转移测试
a.关闭master MongoDB服务
# systemctl stop mongod
b.登陆任意从节点数据库，查看状态
# mongo --host=node2
>use admin
>rs.status()
可以看到priority优先级为5的节点已经变成了主节点。
c.在新的主节点添加数据。
rs1:PRIMARY> db.user2.insert({"姓名":"李四","年龄":25,"性别":"女"})
WriteResult({ "nInserted" : 1 })
rs1:PRIMARY> db.user2.find()
{ "_id" : ObjectId("5b7bd44c6129560c71cc22e0"), "姓名" : "李四", "年龄" : 25, "性别" : "女" }
d.启动故障节点的MongoD服务
#systemctl start mongod
#mongo --host=master
> use admin
>rs.stauts()
可以看到故障服务器上线以后，又变成了主库。
> db.user2.find() #查询刚才添加的数据
{ "_id" : ObjectId("5b7bd44c6129560c71cc22e0"), "姓名" : "李四", "年龄" : 25, "性别" : "女" }
