XenServer7.0创建本地ISO库
在6.5版本上创建ISO仓库不会牵扯到创建lvm时权限错误，但是再7.0版本却会出现这种错误，如下：1
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# lvcreate -L 20G -n local_iso `vgs|awk 'NR==2{print $1}'`
lvcreate -L 20G -n local_iso VG_XenStorage-8e812398-6d55-b06a-2907-ac95c4c12533: Command not permitted while global/metadata_read_only is set.
提示为全局只读，不给创建。查官方资料，需要添加一个全局配置选项“--config global{metadata_read_only=0}”
在xenserver7上如下按如下步骤添加本地ISO仓库：
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# lvcreate -L 20G -n local_iso `vgs|awk 'NR==2{print $1}'`--config global{metadata_read_only=0}
Logical volume "local_iso" created.
# mkfs.ext4 /dev/`vgs|awk 'NR==2{print $1}'`/local_iso
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
1310720 inodes, 5242880 blocks
262144 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2153775104
160 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
# blkid /dev/`vgs|awk 'NR==2{print $1}'`/local_iso
/dev/VG_XenStorage-8e812398-6d55-b06a-2907-ac95c4c12533/local_iso: UUID="70674e3f-2d08-4623-b348-2f8bb6482c4d" TYPE="ext4"
# echo 'UUID=70674e3f-2d08-4623-b348-2f8bb6482c4d/iso_storageext4defaults 0 0' >>/etc/fstab
# mkdir /iso_storage
# mount -a
# df -hP
Filesystem SizeUsed Avail Use% Mounted on
/dev/sda1 18G1.8G 16G11% /
devtmpfs 2.0G 02.0G 0% /dev
tmpfs 2.0G 84K2.0G 1% /dev/shm
tmpfs 2.0G1.6M2.0G 1% /run
tmpfs 2.0G 02.0G 0% /sys/fs/cgroup
xenstore 2.0G 02.0G 0% /var/lib/xenstored
/dev/loop0 55M 55M 0 100% /var/xen/xc-install
/dev/sda4 512M2.0M510M 1% /boot/efi
/dev/sda5 4.0G140M3.7G 4% /var/log
tmpfs 393M 0393M 0% /run/user/0
/dev/VG_XenStorage-8e812398-6d55-b06a-2907-ac95c4c12533/local_iso 20G 45M 19G 1% /iso_storage
# xe sr-create name-label=iso_storage type=iso device-config:location=/iso_storage device-config:legacy_mode=true content-type=iso
xe-mount-iso-sr /iso_storage
在管理界面查看ISO仓库：
https://s1.iyunv.com/wyfs02/M01/8D/DF/wKioL1itk3uwi15pAADMle_AJ3c982.png
至此，本地仓库创建成功。
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