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Add a VM in plain disk:

gnt-instance add plain --disk 0:size=20G --disk 1:size=200M \
-B memory=2G,vcpus=2 -o debootstrap+jessie --no-ip-check \ 
--no-name-check vm.domain.com

Add a VM in DRBD (fully-sharred between two servers) :

gnt-instance add drbd --disk 0:size=20G --disk 1:size=200M \
-B memory=2G,vcpus=2 -o debootstrap+jessie --no-ip-check \

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HOW-TO Install Ganeti/Xen/DRBD ?

You need a Volum Group on your server (LVM) named "vgganeti" for store VMs.

apt-get update && apt-get dist-upgrade
apt-get install git vim aptitude sudo htop screen curl openssh-server locales
apt-get -y install xen-linux-system xen-tools
dpkg-divert --divert /etc/grub.d/08_linux_xen --rename /etc/grub.d/20_linux_xen
sed -i '/TOOLSTACK/s/=.*/=xl/' /etc/default/xen
echo 'GRUB_CMDLINE_XEN_DEFAULT="dom0_mem=1024M,max:1024M \
  dom0_max_vcpus=1 dom0_vcpus_pin"' > /etc/default/grub

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#! /bin/bash
domain=your-domain.com
[email protected]
apt-get update; apt-get install git openssl
cd /srv
git clone https://github.com/letsencrypt/letsencrypt ; cd letsencrypt
mkdir -p live-ecdsa/$domain/lemp
cd live-ecdsa/$domain/
openssl ecparam -genkey -name secp384r1 > privkey-p384.pem
openssl req -new -sha256 -key privkey-p384.pem -subj "/CN=$domain" -reqexts SAN -config <(cat /etc/ssl/openssl.cnf <(printf "[SAN]\nsubjectAltName=DNS:$domain")) -outform der -out >

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wget -q -O- "http://debian.saltstack.com/debian-salt-team-joehealy.gpg.key" | apt-key add -
echo "deb http://debian.saltstack.com/debian jessie-saltstack main" > /etc/apt/sources.list.d/salt.list
apt-get update ; apt-get -y install salt-master

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apt-get install -y apt-transport-https ca-certificates python-pip
apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
echo "deb https://apt.dockerproject.org/repo debian-jessie main" > /etc/apt/sources.list.d/docker.list
apt-get update ; apt-get -y install docker-engine
pip install docker-compose

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FROM php:7.0.5-fpm

RUN apt-get update && apt-get install -y libpng12-dev libjpeg-dev && rm -rf /var/lib/apt/lists/* \
	&& docker-php-ext-configure gd --with-png-dir=/usr --with-jpeg-dir=/usr \
	&& docker-php-ext-install gd mysqli opcache

RUN { \
		echo 'opcache.memory_consumption=128'; \
		echo 'opcache.interned_strings_buffer=8'; \
		echo 'opcache.max_accelerated_files=4000'; \

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web_db:
   image: mariadb:latest
   restart: always
   volumes:
    - ./var/mysql:/var/lib/mysql
   environment:
    MYSQL_ROOT_PASSWORD: @Str0NgP@Ssw0rd

web_front:
  image: nginx

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# Composition of the containers

owncloud:
  image: owncloud
  ports:
   - 80:80
  volumes_from:
    - owncloud-data
  links:
   - postgres:owncloud-db

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worker_processes  1;
 
 
events {
    worker_connections  1024;
}
 
http {
    include       mime.types;
 

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worker_processes  1;
 
 
events {
    worker_connections  1024;
}
 
http {
    include       mime.types;