deb-murano/doc/source/image_builders/linux.rst

Linux Image

Create a VM

This section describes steps required to build an image of Linux Virtual Machine which could be used with Murano. There are two possible ways to create it - from CLI or using GUI tools. We describe both in this section.

Note

Run all commands as root.

Way 1: Using CLI Tools

This section describes the required step to launch a VM using CLI tools only.

1. Preallocate disk image

   ># qemu-img create -f qcow2 /var/lib/libvirt/images/cloud-linux.img 10G

2. Start the VM

   ># virt-install --connect qemu:///system --hvm --name cloud-linux \
     --ram 2048 --vcpus 2 --cdrom /PATH_TO_YOUR_LINUX.ISO \
     --disk path=/var/lib/libvirt/images/cloud-linux.img, \
     format=qcow2,bus=virtio,cache=none \
     --network network=default,model=virtio \
     --memballoon model=virtio --vnc --os-type=linux \
     --accelerate --noapic --keymap=en-us --video=cirrus --force

Way 2: Using virt-manager UI

A VM also could be lauched via GUI tools like virt-manager.

1. Launch virt-manager from shell as root
2. Set a name for VM and select Local install media
3. Add one cdrom and attach your linux ISO image to it
4. Select OS type Linux and it's version choose yours
5. Set CPU and RAM amount
6. Deselect option Enable storage for this virtual machine
7. Select option Customize configuration before install
8. Add (or create new) HDD image with Disk bus VirtIO and storage format QCOW2
9. Set network device model VirtIO
10. Start installation process and open guest vm screen through Console button

Guest VM Linux OS preparation

Ubuntu 12.04 LTS x86_64

># for action in update upgrade dist-upgrade;do apt-get -y $action;done
># apt-get install -y git unzip make cmake gcc python-dev python-pip openssh-server sudo

CentOS 6.4 x86_64

># rpm -ivh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
># for action in update upgrade;do yum -y $action; done
># yum install -y git unzip make cmake gcc python-devel python-pip openssh-server openssh-clients sudo

murano-agent installation steps

># mkdir -p /opt/git
># cd /opt/git
># git clone https://github.com/stackforge/murano-agent.git
># cd murano-agent/python-agent
># git checkout release-0.5
># chmod a+x setup*.sh

# To install Murano Agent on run the following command:
-  **Ubuntu**
   ># ./setup.sh install
-  **CentOS**
   ># ./setup-centos.sh install

cloud-init installation steps

• Ubuntu

  ># apt-get install -y cloud-init cloud-initramfs-growroot

• CentOS

  ># yum install -y cloud-init
  
  
  **Note**
  
  **Ubuntu only**
  
  ::
  
      ># dpkg-reconfigure cloud-init
  
  
  Mark **EC2** data source support, save and exit or add manualy
  **Ec2** to the datasource\_list variable in the
  /etc/cloud/cloud.cfg.d/90\_dfkg.cfg

• Minimal cloud-init configuration options

  ># vi /etc/cloud/cloud.cfg:
      user: ec2-user
      disable_root: 1
      preserve_hostname: False

Security setup

Create user and make it able to run commands through sudo without password prompt.

• Ubuntu

  ># useradd -m -G sudo -s /bin/bash ec2-user
  ># passwd ec2-user

• CentOS

  ># useradd -m -G wheel -s /bin/bash ec2-user
  ># passwd ec2-user

• Sudo

  ># echo "ec2-user   ALL=(ALL)  NOPASSWD: ALL" > /etc/sudoers.d/ec2-user
  ># chmod 440 /etc/sudoers.d/ec2-user

Disable SSH password-based logins in the /etc/ssh/sshd_config.

...
GSSAPIAuthentication no
PasswordAuthentication no
PermitRootLogin no
...

</itemizedlist> </para> Network handling

• Ubuntu

  ># rm -rf /etc/udev/rules.d/70-persistent-net.rules

• CentOS Remove or comment out HWADDR and UUID in /etc/sysconfig/network-scripts/ifcfg-eth*

  ># rm -rf /etc/udev/rules.d/70-persistent-net.rules

Shutdown VM

Convert the image from RAW to QCOW2 format if you made it as RAW.

The image must be converted from RAW format to QCOW2 before being imorted into Glance.

># qemu-img convert -O qcow2 /var/lib/libvirt/images/cloud-linux.img \
/var/lib/libvirt/images/cloud-linux.img.qcow2