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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-users] create C7 domU from C6 dom0 using kickstart (trick)
If you want your C7 domU on the ext4 filesys, you will run into trouble using the pygrub bootloader or trying to e2fsck your domU partition from C6 dom0. The reason is 2 fold: in the above tinyURL you can see the patch where RHEL7 drank the kool-aid and added a mke2fs flag used by no other Linux distro. They are singular in this setting. The other reason is C6 doesn't have this flag available. So C6 ext4 is limited to 16TB partition size. To workaround this, you need to coax the C7 installer to drop this `64bit` flag. You can do it in a ks pre-install script. At the top of your ks script add: ------------- c7-ks.cfg ----------- %pre #!/bin/bash alias mkfs.ext4='mkfs.ext4 -O ^64bit' sed -i -e 's/,64bit$//' /etc/mke2fs.conf %end #version=RHEL7 install text cdrom ------------ snip ------- Here's the xl cfg I used to do the pv install cat tackc7.cfg ------------- tackc7.cfg ------------ name="tackc7" memory=1012 maxmem=1012 vcpus=2 uuid="6e01d05d-83a9-4740-8d3d-e075de502acc" vif=['bridge=br0,mac=00:16:3E:23:1E:11'] disk=['file:/data4/cent7/CentOS-7.0-x86_64-Minimal.iso,xvdc:cdrom,r', 'phy:/dev/maxvm/tackc7,xvda,w' ] #disk=[ 'phy:/dev/maxvm/tackc7,xvda,w' ] kernel='/home/tlviewer/junkc7/vmlinuz' ramdisk='/home/tlviewer/junkc7/initrd.img' #vfb=[ "type=vnc,vncunused=1,keymap=en-us" ] #bootloader="pygrub" #bootloader_args=['-q'] extra=" rd_NO_LUKS rd.lvm=0 rd_NO_MD rd_NO_DM nodmraid net.ifnames=0 biosdevname=0 ipv6.disable=1 ks=http://192.168.1.224/public/c7-ks.cfg text console=hvc0" #extra = " root=/dev/xvda1 console=hvc0 " on_reboot = 'restart' ---------------- snip cfg ----------- Now your C6 e2fsprogs tools will work on the C7 device! ]$sudo kpartx -a -v /dev/maxvm/tackc7 add map maxvm-tackc7p1 (253:58): 0 8386560 linear /dev/maxvm/tackc7 2048 // now the 64bit flag is gone from `features` ]$ sudo dumpe2fs -h /dev/mapper/maxvm-tackc7p1 dumpe2fs 1.41.12 (17-May-2010) Filesystem volume name: <none> Last mounted on: / Filesystem UUID: 9d55016f-7604-4271-92bd-09c7ecbc1ae7 Filesystem magic number: 0xEF53 Filesystem revision #: 1 (dynamic) Filesystem features: has_journal ext_attr resize_inode dir_index filetype extent flex_bg sparse_super large_file huge_file uninit_bg dir_nlink extra_isize Filesystem flags: signed_directory_hash Default mount options: user_xattr acl Filesystem state: clean Errors behavior: Continue Filesystem OS type: Linux Inode count: 262144 Block count: 1048320 Reserved block count: 52416 Free blocks: 801713 Free inodes: 237716 First block: 0 Block size: 4096 Fragment size: 4096 Reserved GDT blocks: 255 Blocks per group: 32768 Fragments per group: 32768 Inodes per group: 8192 Inode blocks per group: 512 Flex block group size: 16 Filesystem created: Thu Feb 12 20:50:17 2015 Last mount time: Thu Feb 12 21:03:17 2015 Last write time: Thu Feb 12 21:03:16 2015 Mount count: 2 Maximum mount count: -1 Last checked: Thu Feb 12 20:50:17 2015 Check interval: 0 (<none>) Lifetime writes: 1443 MB Reserved blocks uid: 0 (user root) Reserved blocks gid: 0 (group root) First inode: 11 Inode size: 256 Required extra isize: 28 Desired extra isize: 28 Journal inode: 8 Default directory hash: half_md4 Directory Hash Seed: 313f65e5-f4ad-4096-8219-65a00631729d Journal backup: inode blocks Journal features: journal_incompat_revoke Journal size: 64M Journal length: 16384 Journal sequence: 0x000007e6 Journal start: 0 ]$ sudo e2fsck /dev/mapper/maxvm-tackc7p1 e2fsck 1.41.12 (17-May-2010) /dev/mapper/maxvm-tackc7p1: clean, 24428/262144 files, 246607/1048320 blocks ]$ sudo kpartx -d -v /dev/maxvm/tackc7 del devmap : maxvm-tackc7p1 _______________________________________________ Xen-users mailing list Xen-users@xxxxxxxxxxxxx http://lists.xen.org/xen-users
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