Back to xfs (#145)

* Use xfs instead of ext4 for CentOS 7

People have complained that libaio requires xfs.

* Don't remove e2fstools and btrfstools from c7

* c7: use dd instead of fallocate to create the swap file

Author: lpancescu

vagrant/centos7.ks

@@ -16,7 +16,7 @@ services --enabled=vmtoolsd
 bootloader --timeout=1 --append="no_timer_check console=tty0 console=ttyS0,115200n8 net.ifnames=0 biosdevname=0 elevator=noop"
 zerombr
 clearpart --all --drives=vda
-part / --fstype=ext4 --asprimary --size=1024 --grow --ondisk=vda
+part / --fstype=xfs --asprimary --size=1024 --grow --ondisk=vda
 
 user --name=vagrant --password=vagrant
 
@@ -34,8 +34,6 @@ chrony
 yum-utils
 hyperv-daemons
 open-vm-tools
--e2fsprogs
--btrfs-progs
 # Vagrant boxes aren't normally visible, no need for Plymouth
 -plymouth
 # Microcode updates cannot work in a VM
@@ -76,9 +74,8 @@ open-vm-tools
 #%end
 
 %post
-
-# configure swap to a file
-fallocate -l 2G /swapfile
+# configure swap to a file (fallocate doesn't work with c7 xfs)
+dd if=/dev/zero of=/swapfile bs=1M count=2048
 chmod 600 /swapfile
 mkswap /swapfile
 echo "/swapfile none swap defaults 0 0" >> /etc/fstab