Tutorial: MongoDB em Docker No CentOS 7

Instalação e configuração e ajuste fino do MongoDB em Docker no Centos&

Procedimento de instalação e exposição de porta.

docker run –name mongoDB -p 27017:27017 -v /storage/mongoDB:/data/db -d mongo:3.0-wheezy

Conectar no mongo via terminal para criação de usuário

docker exec -it mongoDB mongo admin

Criação de usuário:

db.createUser({ user: ‘MyUser’, pwd: ‘MyPass’, roles: [ { role: “userAdminAnyDatabase”, db: “admin” } ] });

Ajuste findo de BlockSize para melhor otimização do Mongo DB, ao receber a seguinte mensagem proceda:

WARNING: Readahead for /data/db is set to 4096KB
We suggest setting it to 256KB (512 sectors) or less
http://dochub.mongodb.org/core/readahead

# vim /usr/lib/tuned/throughput-performance/tuned.conf

Localize e o readahead e altere seu valor para 256

Para os seguintes ajustes, proceda:

WARNING: /sys/kernel/mm/transparent_hugepage/enabled is ‘always’.
We suggest setting it to ‘never’

WARNING: /sys/kernel/mm/transparent_hugepage/defrag is ‘always’.
We suggest setting it to ‘never’

Create the init.d script.

Create the following file at /etc/init.d/disable-transparent-hugepages:

#!/bin/bash
### BEGIN INIT INFO
# Provides:          disable-transparent-hugepages
# Required-Start:    $local_fs
# Required-Stop:
# X-Start-Before:    mongod mongodb-mms-automation-agent
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Disable Linux transparent huge pages
# Description:       Disable Linux transparent huge pages, to improve
#                    database performance.
### END INIT INFO

case $1 in
  start)
    if [ -d /sys/kernel/mm/transparent_hugepage ]; then
      thp_path=/sys/kernel/mm/transparent_hugepage
    elif [ -d /sys/kernel/mm/redhat_transparent_hugepage ]; then
      thp_path=/sys/kernel/mm/redhat_transparent_hugepage
    else
      return 0
    fi

    echo 'never' > ${thp_path}/enabled
    echo 'never' > ${thp_path}/defrag

    re='^[0-1]+$'
    if [[ $(cat ${thp_path}/khugepaged/defrag) =~ $re ]]
    then
      # RHEL 7
      echo 0  > ${thp_path}/khugepaged/defrag
    else
      # RHEL 6
      echo 'no' > ${thp_path}/khugepaged/defrag
    fi

    unset re
    unset thp_path
    ;;
esac

Make it executable.

Run the following command to ensure that the init script can be used:

sudo chmod 755 /etc/init.d/disable-transparent-hugepages

Configure your operating system to run it on boot.¶

Use the appropriate command to configure the new init script on your Linux distribution.

Distribution	Command
Ubuntu and Debian	sudo update-rc.d disable-transparent-hugepages defaults
SUSE	sudo insserv /etc/init.d/disable-transparent-hugepages
Red Hat, CentOS, Amazon Linux, and derivatives	sudo chkconfig

Tutorial: MongoDB em Docker No CentOS 7