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Steps to create minimal CentOS 6 container template:

1.Create a directory where the template files will be created

mkdir -p /var/lib/libvirt/lxc/centos-6-x86_64

2. Create yum repo folder within container root

mkdir -p /var/lib/libvirt/lxc/centos-6-x86_64/etc/yum.repos.d/

3. Create CentOS repo 

cat /etc/yum.repos.d/CentOS-Base.repo |sed s/'$releasever'/6/g > /var/lib/libvirt/lxc/centos-6-x86_64/etc/yum.repos.d/CentOS-Base.repo

4. Install core packages. --installroot param will install these packages into container root folder

yum groupinstall core --installroot=/var/lib/libvirt/lxc/centos-6-x86_64/ --nogpgcheck -y

5. Install any additional packages if required: 

yum install plymouth libselinux-python --installroot=/var/lib/libvirt/lxc/centos-6-x86_64/ --nogpgcheck -y

6. Container can be configured further using chroot

chroot /var/lib/libvirt/lxc/centos-6-x86_64/

7. CloudStack requires template in tar.gz format. Create a tar.gz from container root /var/lib/libvirt/lxc/centos-6-x86_64/ 

cd /var/lib/libvirt/lxc/centos-6-x86_64/

tar -cvzf centos-6-x86_64.tar.gz *

8. centos-6-x86_64.tar.gz can be registered as a template in CloudStack

 

 

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