mongoDB 启动与停止

MongoDB是一个基于分布式文件存储的数据库。由C++语言编写。旨在为WEB应用提供可扩展的高性能数据存储解决方案。它以高性能、易部署、易使用，存储数据非常方便等优点被广泛使用。其安装配置相当简单，有如轻量级的mysql，但功能丝毫不差。本文主要描述mongoDB的启动与停止。

一、准备环境

1、当前环境 # more /etc/redhat-release  CentOS release 6.7 (Final)

2、安装mongod # which mongod /var/lib/mongodb/bin/mongod

3、创建数据目录 # mkdir -pv /data/mongodata/{rs1,rs2,rs3} # mkdir -pv /var/lib/mongodb/conf

二、启动mongodb

1、基于命令行方式启动mongodb # mongod --dbpath=/data/mongodata/rs1 --logpath=/data/mongodata/rs1/rs1.log & 缺省端口为 [root@node3 rs1]# netstat -nltp|grep mongod tcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN 5062/mongod 2、基于配置文件的命令行启动 vi /var/lib/mongodb/conf/rs2.conf port = 27000 dbpath = /data/mongodata/rs2 logpath = /data/mongodata/rs2/rs2.log smallfiles = true fork = true pidfilepath = /var/run/mongo.pid # mongod --config /var/lib/mongodb/conf/rs2.conf &  Author : Leshami  Blog : http://blog.csdn.net/leshami # netstat -nltp|grep 27000 tcp 0 0 0.0.0.0:27000 0.0.0.0:* LISTEN 5356/mongod 3、以守护进程方式启动mongodb # mongod --dbpath=/data/mongodata/rs3 --logpath=/data/mongodata/rs1/rs3.log --fork --port 28000 # netstat -nltp|grep mongod tcp 0 0 0.0.0.0:28000 0.0.0.0:* LISTEN 5465/mongod tcp 0 0 0.0.0.0:27017 0.0.0.0:* LISTEN 5435/mongod tcp 0 0 0.0.0.0:27000 0.0.0.0:* LISTEN 5448/mongod 4、使用系统服务的方式启动mogodb 启动脚本 # vi /etc/init.d/mongod #!/bin/sh  # chkconfig: 2345 93 18  #MogoDB home directory  MONGODB_HOME=/var/lib/mongodb #mongodb command  MONGODB_BIN=$MONGODB_HOME/bin/mongod #mongodb config file MONGODB_CONF=$MONGODB_HOME/conf/mongodb.conf #mongodb PID MONGODB_PID=/var/run/mongo.pid #set open file limit SYSTEM_MAXFD=65535 MONGODB_NAME="mongodb" . /etc/rc.d/init.d/functions if [ ! -f $MONGODB_BIN ] then echo "$MONGODB_NAME startup: $MONGODB_BIN not exists! " exit fi start(){ ulimit -HSn $SYSTEM_MAXFD $MONGODB_BIN --config="$MONGODB_CONF" --fork added @ ret=$? if [ $ret -eq 0 ]; then action $"Starting $MONGODB_NAME: " /bin/true else action $"Starting $MONGODB_NAME: " /bin/false fi } stop(){ PID=$(ps aux |grep "$MONGODB_NAME" |grep "$MONGODB_CONF" |grep -v grep |wc -l) if [[ $PID -eq 0 ]];then action $"Stopping $MONGODB_NAME: " /bin/false exit fi kill -HUP `cat $MONGODB_PID` ret=$? if [ $ret -eq 0 ]; then action $"Stopping $MONGODB_NAME: " /bin/true rm -f $MONGODB_PID else action $"Stopping $MONGODB_NAME: " /bin/false fi } restart() { stop sleep 2 start } case "$1" in start) start ;; stop) stop ;; status) status $prog ;; restart) restart ;; *) echo $"Usage: $0 {start|stop|status|restart}" esac # chmod u+x /etc/init.d/mongod # service mongod start about to fork child process, waiting until server is ready for connections. forked process: 5543 child process started successfully, parent exiting Starting mongodb: [ OK ]

三、停止mongoDB

1、向mongod进程发送信号 SIGINT信号 # ps -ef|grep mongod|grep rs1 root 5435 4914 1 19:13 pts/2 00:00:14 mongod --dbpath=/data/mongodata/rs1 --logpath=/data/mongodata/rs1/rs1.log # kill -2 5435 2016-08-30T17:02:00.528+0800 I CONTROL[signalProcessingThread] got signal 2(Interrupt), will terminate after current cmd ends 2016-08-30T17:02:00.530+0800 I REPL [signalProcessingThread] Stopping replication applier threads 2016-08-30T17:02:00.554+0800 I STORAGE [conn1253] got request after shutdown() 2016-08-30T17:02:00.774+0800 I CONTROL [signalProcessingThread] now exiting 2016-08-30T17:02:00.774+0800 I NETWORK [signalProcessingThread] shutdown: going to close listening sockets... 2016-08-30T17:02:00.774+0800 I NETWORK [signalProcessingThread] closing listening socket: 6 2016-08-30T17:02:00.775+0800 I NETWORK [signalProcessingThread] closing listening socket: 7 2016-08-30T17:02:00.775+0800 I NETWORK [signalProcessingThread] removing socket file: /tmp/mongodb-27017.sock 2016-08-30T17:02:00.775+0800 I NETWORK [signalProcessingThread] shutdown: going to flush diaglog... 2016-08-30T17:02:00.775+0800 I NETWORK [signalProcessingThread] shutdown: going to close sockets... 2016-08-30T17:02:00.775+0800 I STORAGE [signalProcessingThread] shutdown: waiting for fs preallocator... 2016-08-30T17:02:00.775+0800 I STORAGE [signalProcessingThread] shutdown: final commit... 2016-08-30T17:02:00.775+0800 I JOURNAL [signalProcessingThread] journalCleanup... 2016-08-30T17:02:00.775+0800 I JOURNAL [signalProcessingThread] removeJournalFiles 2016-08-30T17:02:00.777+0800 I NETWORK [conn1254] end connection 192.168.1.247:58349 (0 connections now open) 2016-08-30T17:02:00.779+0800 I JOURNAL [signalProcessingThread] Terminating durability thread ... 2016-08-30T17:02:00.881+0800 I JOURNAL [journal writer] Journal writer thread stopped 2016-08-30T17:02:00.882+0800 I JOURNAL [durability] Durability thread stopped 2016-08-30T17:02:00.882+0800 I STORAGE [signalProcessingThread] shutdown: closing all files... 2016-08-30T17:02:00.884+0800 I STORAGE [signalProcessingThread] closeAllFiles() finished 2016-08-30T17:02:00.884+0800 I STORAGE [signalProcessingThread] shutdown: removing fs lock... 2016-08-30T17:02:00.885+0800 I CONTROL [signalProcessingThread] dbexit: rc: 0 SIGTERM信号 # ps -ef|grep mongod|grep rs3 # ps -ef|grep mongod|grep rs3 root 5465 1 1 19:14 ? 00:00:13 mongod --dbpath=/data/mongodata/rs3 --logpath=/data/mongodata/rs1/rs3.log --fork --port 28000 # kill -4 5465 信号 产生方式 sigint 通过ctrl+c将会对当进程发送此信号 sigterm kill命令不加参数就是发送这个信号 对进程的影响 sigint 信号被当前进程树接收到，也就是说，不仅当前进程会收到信号，它的子进程也会收到 sigterm只有当前进程收到信号，子进程不会收到。如果当前进程被kill了，那么它的子进程的父进程将会是init，也就是pid为1的进程 上述信号在发出后 不再接受新的连接请求 等待现有的连接处理完毕 关闭所有打开的连接 将内存的数据写出到磁盘 安全停止 2、使用系统服务脚本方式停止mongod # ps -ef|grep mongod root 5675 1 3 19:33 ? 00:00:00 /var/lib/mongodb/bin/mongod --config=/var/lib/mongodb/conf/rs2.conf root 5689 4950 0 19:33 pts/3 00:00:00 grep mongod [root@node3 conf]#  [root@node3 conf]# service mongod stop Stopping mongodb: [ OK ] 3、db.shutdownServer()方式 # mongo localhost:27000 > use admin > db.shutdownServer() 4、使用命令行方式关闭(补充@) # mongod -f /etc/mongo-m.conf --shutdown 5、强制关闭mongod # kill -9 5675 缺点： 数据库直接关闭 数据丢失 数据文件容易损坏(需要进行修复)