centos7下MongoDB3.4安装并解决告警

MongoDB官网下载安装包 3.6.8版本wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel62-3.6.8.tgz3.4.18版本wget https://fastdl.mongodb.org/linux/mongodb-linux-x86_64-rhel62-3.4.18.tgz解压tar zxf mongodb-linux-x86_64-rhel62-3.4.18.tgzmv mongodb-linux-x86_64-rhel62-3.4.18 /usr/local/mongodbecho 'export PATH=$PATH:/usr/local/mongodb/bin'>> /etc/profilesource /etc/profilegroupadd mongouseradd -g mongo mongomkdir -p /server/mongodb27017/datamkdir -p /server/mongodb27017/logchown -R mongo.mongo /server/mongodb27017/chown -R mongo.mongo   /usr/local/mongodbvim /server/mongodb27017/mongodb27017.cnf

配置文件

#SERVERfork = trueport = 27017quiet = true dbpath = /server/mongodb27017/datalogpath = /server/mongodb27017/log/mongod.loglogappend = truejournal = true#auth = true   #开启认证 # <=3.4nohttpinterface = truedirectoryperdb = true#SLOW_LOGprofile = 1slowms = 500#RSreplSet = rs01oplogSize = 4096# add for 3.4# shardsvr = true#SCO#cinfigsvr = true#configdb = MSCHOST#USER#keyFile=/#setParameter=enableLocalhostAuthBypass=1storageEngine=wiredTigerwiredTigerCacheSizeGB=1wiredTigerCollectionBlockCompressor=snappy#mongo_version=mongodb34

启动

sudo -u mongo mongod -f /server/mongodb27017/mongodb27017.cnf

进入命令行

mongo 127.0.0.1:27017

敲命令报错

"errmsg" : "not master and slaveOk=false",

初始化

rs.initiate({_id:'rs01',version:1,members:[{_id:0,host:'10.238.162.33:27017'}]}) ;

完成

安装完成后进入MongoDB的shell命令行后出现了很多报警如下，虽然都是一些warning，不影响使用，但是感觉就像是一个人处于亚健康状态，当数据库压力过大的时候这些warning有可能导致数据库出现error。所以下面挨着每个解决一下。

告警1

** WARNING: You are running this process as the root user, which is not recommended.

解决：启动MongoDB的时候使用普通用户，而不用root用户执行

sudo -u mongo mongod -f /server/mongodb27017/mongodb27017.cnf

告警2

2018-11-15T17:21:03.335+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/enabled is 'always'.2018-11-15T17:21:03.335+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'2018-11-15T17:21:03.335+0800 I CONTROL  [initandlisten]2018-11-15T17:21:03.335+0800 I CONTROL  [initandlisten] ** WARNING: /sys/kernel/mm/transparent_hugepage/defrag is 'always'.2018-11-15T17:21:03.335+0800 I CONTROL  [initandlisten] **        We suggest setting it to 'never'

解决

echo "never" >> /sys/kernel/mm/transparent_hugepage/enabled

echo "never" >> /sys/kernel/mm/transparent_hugepage/defrag

并添加到 /etc/rc.local

告警3

** WARNING: soft rlimits too low. rlimits set to 4096 processes, 65535 files. Number of processes should be at least 32767.5 : 0.5 times number of files.解决vim /etc/security/limits.confmongo soft nofile  65535mongo hard nofile  65535mongo soft nproc 65535mongo hard nproc  65535mongo soft stack 1024mongo hards tack 1024vim /etc/security/limits.d/90-nproc.confsoft nproc 65535

告警4

WARNING: Access control is not enabled for the database.2018-11-15T17:38:44.181+0800 I CONTROL  [initandlisten] **          Read and write access to data and configuration is unrestricted.use admindb.createUser({user: "root", //用户名pwd: "root", //密码roles: [ { role: "userAdminAnyDatabase", db: "admin" } ] //权限}在配置文件中添加auth = true

依次解决后进入shell命令行，真的干净！没有任何告警信息，简直是强迫症患者福音 O(∩_∩)O哈哈~

再见 各位~