概述：
在启动mongod和mongos时可以通过配置文件来启动控制实例。
该配置文件包含的设置同等于mongod和mongos命令选项。
使用配置文件管理mongod和mongos更容易，特别是对于大规模部署。
还可以在配置文件中添加注释来解释服务器设置选项。
使用配置文件：
要启动mongod和mongos时使用配置文件，通过–config或者-f选项指定配置文件。
例：
mongod –config /etc/mongod.conf //–config可以用-f替代
mongos –config /etc/mongos.conf
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文件格式：
Mongodb的配置文件使用YAML格式。
注意：YAML不接受tab，请使用空格代替。
官方地址介绍：点击跳转。
#此处为配置文件可配置的内容
#Mongod config file
#MongoDB configuration files use the YAML format.
#The following example configuration file contains several mongod settings.
#
########Example Start########
#systemLog:
# destination: file
# path: "/var/log/mongodb/mongodb.log"
# logAppend: true
#storage:
# journal:
# enabled: true
#processManagement:
# fork: true
#net:
# bindIp: 127.0.0.1
# port: 27017
#setParameter:
# enableLocalhostAuthBypass: false
#
########Example End########
#
########Core Options
systemLog:
# verbosity: 0 #Default: 0; 1 to 5 increases the verbosity level to include Debug messages.
# quiet:
# traceAllException:
# syslogFacility: user
path: "/usr/local/mongodb/log/mongod.log"
logAppend: true
# logRotate: #rename or reopen
destination: file
# timeStampFormat: iso8601-local
# component:
# accessControl:
# verbosity: 0
# command:
# verbosity: 0
# # COMMENT additional component verbosity settings omitted for brevity
# storage:
# verbosity: 0
# journal:
# verbosity:
# write:
# verbosity: 0
#
#
########ProcessManagement Options
processManagement:
fork: true
pidFilePath: "/usr/local/mongodb/log/mongod.pid"
#
#
#########Net Options
net:
port: 27017
# bindIp: #Default All interfaces.
# maxIncomingConnections: 65536
# wireObjectCheck: true
# ipv6: false
# unixDomainSocket:
# enabled: true
# pathPrefix: "/tmp"
# filePermissions: 0700
# http:
# enabled: false
# JSONPEnabled: false
# RESTInterfaceEnabled: false
# ssl:
# sslOnNormalPorts: # deprecated since 2.6
# mode:
# PEMKeyFile:
# PEMKeyPassword:
# clusterFile:
# clusterPassword:
# CAFile:
# CRLFile:
# allowConnectionsWithoutCertificates:
# allowInvalidCertificates:
# allowInvalidHostnames: false
# FIPSMode:
#
#
########security Options
#security:
# keyFile:
# clusterAuthMode: keyFile
# authorization: disable
# javascriptEnabled: true
########security.sasl Options
# sasl:
# hostName:
# serviceName:
# saslauthdSocketPath:
#
#
#########setParameter Option
setParameter:
enableLocalhostAuthBypass: false
# :
# :
#
#
#########storage Options
storage:
dbPath: "/data/db"
# indexBuildRetry: true
# repairPath: "/data/db/_tmp"
# journal:
# enabled: true
# directoryPerDB: false
# syncPeriodSecs: 60
engine: "mmapv1" #Valid options include mmapv1 and wiredTiger.
#########storage.mmapv1 Options
# mmapv1:
# preallocDataFiles: true
# nsSize: 16
# quota:
# enforced: false
# maxFilesPerDB: 8
# smallFiles: false
# journal:
# debugFlags:
# commitIntervalMs: 100 # 100 or 30
#########storage.wiredTiger Options
# wiredTiger:
# engineConfig:
# cacheSizeGB: #Default: the maximum of half of physical RAM or 1 gigabyte
# statisticsLogDelaySecs: 0
# journalCompressor: "snappy"
# directoryForIndexes: false
# collectionConfig:
# blockCompressor: "snappy"
# indexConfig:
# prefixCompression: true
#
#
##########operationProfiling Options
#operationProfiling:
# slowOpThresholdMs: 100
# mode: "off"
#
#
##########replication Options
#replication:
# oplogSizeMB:
# replSetName:
# secondaryIndexPrefetch: all
#
#
##########sharding Options
#sharding:
# clusterRole: #configsvr or shardsvr
# archiveMovedChunks: True
#
#
#########auditLog Options
#auditLog:
# destination: #syslog/console/file
# format: #JSON/BSON
# path:
# filter:
#
#
#########snmp Options
#snmp:
# subagent:
# master:
#
#
########mongos-only Options
#replication:
# localPingThresholdMs: 15
#
#sharding:
# autoSplit: true
# configDB:
# chunkSize: 64
#
#
########Windows Service Options
#processManagement:
# windowsService:
# serviceName:
# displayName:
# description:
# serviceUser:
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