For many years now I've been using VirtualBox.
In fact, I've been using it for so long it was a Sun Microsystems
product whenever I started using it. It is incredibly easy to get
started with, you can have a working virtualization environment on top
of Ubuntu Linux in minutes. As a platform for experimentation and
development, it is very difficult to beat. It is actually open source
but most of the features that are make it a modern virtualization
platform are closed source. As far as I am concerned it is closed source
platform that happens to be free for my personal use.
I've never really been happy with VirtualBox as a host for virtual machines that are in someway critical to infrastructure. I do lot of tinkering with things, but once I am satisfied with a solution I'd prefer to never touch it again. The ease of use that comes with the graphical user interface is starkly contrasted by the command-line
The real thing that has pushed me away from VirtualBox as a production environment is that on several occasions I've had multiple virtual machines simply abort with no explanation. There are no logs of any kind to indicate a problem. The worse part is that when I restarted them they just worked. There was not even an appearance of them being broken. So I have been searching for a replacement for a while. My requirements are straightforward.
Proxmox is an attractive solution because it is a linux distribution designed for virtualization but is still just a basic Debian machine. If it is easy enough to get it running, I should be able to customize it to fit my needs. I downloaded Proxmox VE 3.2.
You'll be prompted for a username and password. Use
To enable the backports add the following line to
Adding the repository just makes the packages available. To mark them for installation you'll need to pin them. Create the file
Now you can install
Once
This file should be easy to understand. If it is not I suggest looking at the documentation for
I have a certificate authority that I used locally to sign the certificate for my machine. If you don't have your own CA setup, I highly recommend using easy-rsa3. You'll need to generate your own.
You enable this new proxy definition by creating a symbolic link in
I disabled the default site by deleting the symbolic link for it
Then do
In the OS tab you'll need to select the operating system type you are installing. I selected "Linux 3.x/2.6 Kernel(I26)".
The first problem you'll run into is that you have no ISO images to use as a boot medium. You can
For the hard drive I created a 24 gigabyte image using the "SATA" Bus type. I used the default
If you want to make more processing power available to the guest operating system add more cores. Adding more sockets could make the kernel think it is running in a NUMA environment of some sort. For memory I chose 1024 megabytes. The CPU and memory can both easily be changed later on.
For networking select the default of "Brigded mode" and use the bridge
After that the machine can be booted by selecting it from the list on the left hand side and clicking the "Start" button near the upper right. It will begin the boot sequence. In order to install CentOS 7, you can connect to the terminal by clicking on the "Console" button that is nearby. The VNC terminal worked fine for me in Firefox. It is Java based, and I barely noticed that I was using a web based piece of software. I'm not going to go through the steps I performed to install CentOS 7 here because there is plenty of literature on that topic already.
As you can see, a bridge is configured instead of using
My DHCP server is authoritative for the domain
The syntax
Now any device on my network using a VLAN of 14 will get an IP address in the
The same syntax used above for declaring the vlan is used in the
No further action was necessary. Now whenever I create virtual machines I have the option of
The
In my case this is on a 2 terabyte hard drive I have in the machine.
This physical volume is added to a single volume group and three logical
volumes are created
I really have no idea how the installer decided on a 7 gigabyte swap
given that I have 8 gigabytes of memory in the machine. Also if you have
a virtualization host that is aggressively swapping, the experience is
going to be miserable. The logical volume
Once in the Debian LiveCD environment you can switch from the default user named
With LVM up and running I added my second disk directly to LVM. You
can partition it if you'd like, but there is generally no reason to.
The first thing to do is to convert the swap volume to be mirrored.
This warrants additional explanation. I found a great reference explaining why the defaults of LVM do not work for a two disk setup. Here is an explanation of the above
Now lets reduce the size of the data fileystem. In my case I am going to reduce it down to 256 gigabytes in size. Even with several virtual machine templates I wound up with 243 gigabytes of free space after doing this. The
The filesystem must be checked with
On a new filesystem this step should complete quickly since few blocks are in use. After
(B∗N)/E=S
The above variables are
- The block size of the filesystem
N
- The length of the filesystem in blocks
E
- The size of the extents used by LVM
S
S
is calculated you will likely wind up with a number that has a fractional remainder. This number must be rounded up to the next integer value. You can call this numberT
S<T
The logical volume can now be resized to free up the physical extents in the volume group.
This step should complete almost instantly. Next we can create a mirrored logical volume for
The syntax of
Now that the copy of the old
To change
Now that we're in the
The UUID will not be the same. Replace
Grub can be reinstalled and updated automatically. There is a good explanation of this process here.
I got the error
Again,
Now just type
Once Proxmox boots back up, SSH in as root. You'll want to start a
After adding the volume group you'll have the option of using logical volumes as the storage for virtual machines. You can add a logical volume to an existing virtual machine by clicking it in the left hand pane, clicking the "Hardware" tab and clicking "Add". From the drop down menu select "Hard Disk". The "Storage" option in the modal dialog has the LVM volume group as an option.
The created logical volume has a predictable name. But it is not mirrored
The logical volume can be made mirrored by using the same
from http://www.hydrogen18.com/blog/proxmox-home-virtualization.html
I've never really been happy with VirtualBox as a host for virtual machines that are in someway critical to infrastructure. I do lot of tinkering with things, but once I am satisfied with a solution I'd prefer to never touch it again. The ease of use that comes with the graphical user interface is starkly contrasted by the command-line
VirtualBox
tool. Literally, everything is available through the command-line tool.
My usual usage pattern involves creating a linked-clone of an existing
machine, changing the NIC's MAC address and then customizing the machine
for the purpose at hand. I can do all this with the GUI and then use VirtualBox startvm 'somevm' --type=headless
to start it from an SSH session. The actual GUI is perfectly usable through X11 forwarded via SSH.The real thing that has pushed me away from VirtualBox as a production environment is that on several occasions I've had multiple virtual machines simply abort with no explanation. There are no logs of any kind to indicate a problem. The worse part is that when I restarted them they just worked. There was not even an appearance of them being broken. So I have been searching for a replacement for a while. My requirements are straightforward.
- Installable without large amounts of effort on my part
- Installable on a single physical piece of consumer-grade hardware
- Have a GUI interface that is usable remotely
- Have a command line interface that is usable remotely
- Support guest templates
- Allow for redundant storage of at least the virtual machine images
- Zero-cost
Proxmox is an attractive solution because it is a linux distribution designed for virtualization but is still just a basic Debian machine. If it is easy enough to get it running, I should be able to customize it to fit my needs. I downloaded Proxmox VE 3.2.
Installation
Installation of Proxmox is done through a linux live cd. By default you'll get a system using theext3
filesystem but if you type linux ext4
at the first prompt the installed system uses the ext4
filesystem. After that you'll have to accept the license agreement. In the next few screens you configure the root
user, the time zone, and country. The installer gets an address from
the local DHCP server if available and then prompts you to accept it. It
is a little strange because it actually statically configures the
network interface to use this IP address. This could cause problems in
some environments. Just make sure you put an IP address in the
configuration screen that is something out side of your DHCP pool. If
you have multiple hard drives Proxmox asks you to select a single one
for installation. After that installation is automatic.The Web Interface
After installation you can jump directly into the web interface. The web interface for Proxmox runs by default on port 8006 serving HTTPS. I'm not really sure how this decision was made. The process is calledpveproxy
and there is no immediately obvious way to reconfigure it. You can
access it directly using the IP address of the box and specifying the
HTTPS protocol succh as https://192.168.1.1:8006/
. However,
most browsers are not thrilled with HTTPS running on non-standard
ports. Chrome on Ubuntu 14.04 was not suitable for using this interface.
The console of each VM is accessed using a VNC client that is Java
based which Chrome did not like. It works very well with Firefox
however.You'll be prompted for a username and password. Use
root
and the password you entered during installation. There is a nag screen
reminding you that you aren't subscribed each time you log in.HTTPS support using nginx
It is much simpler to just installnginx
to handle the HTTPS duties. This is strictly optional. The web interface uses web sockets to support VNC. The version of nginx
that is installed is too old to support this. A newer version is available from the debian wheezy backports. To enable the backports add the following line to
/etc/apt/sources.list
deb http://ftp.debian.org/debian wheezy-backports main contrib non-free
/etc/apt/preferences.d/nginx-backports
and give it the following contentPackage: nginx* Pin: release n=wheezy-backports Pin-Priority: 900
nginx
with aptitude install nginx
. You should get a 1.6.x version from the backports repository. Check this by doing the following.# nginx -v nginx version: nginx/1.6.2
nginx
is installed you'll need to configure it to act as a proxy to the pveproxy
process running on the machine. I created the file /etc/nginx/sites-available/proxmox
.upstream proxmox { #proxy to the locally running instance of pveproxy server 127.0.0.1:8006; keepalive 1; } server { listen 80; server_name proxmox.your.domain; #Do not redirect to something like $host$1 here because it can #send clients using the IP address to something like https://192.168.1.1 rewrite ^(.*) https://proxmox.your.domain permanent; } server { listen 443; server_name proxmox.your.domain; ssl on; #The server certificate and any intermediaries concatenated in order ssl_certificate /etc/nginx/proxmox.your.domain.crt; #The private key to the server certificate ssl_certificate_key /etc/nginx/proxmox.your.domain.key; #Only use TLS 1.2 #comment this out if you have very old devices ssl_protocols TLSv1.2; #Forward everything SSL to the pveproxy process proxy_redirect off; location ~ ^.+websocket$ { proxy_pass https://proxmox; proxy_http_version 1.1; proxy_set_header Upgrade $http_upgrade; proxy_set_header Connection "upgrade"; } location / { proxy_pass https://proxmox; proxy_http_version 1.1; } }
nginx
here, here, and here.I have a certificate authority that I used locally to sign the certificate for my machine. If you don't have your own CA setup, I highly recommend using easy-rsa3. You'll need to generate your own.
You enable this new proxy definition by creating a symbolic link in
/etc/nginx/sites-enabled
.ln -v -s /etc/nginx/sites-available/proxmox /etc/nginx/sites-enabled/proxmox
rm -v /etc/nginx/sites-enabled/default
service nginx restart
. After that you can access the machine like any other HTTPS enabled site.Creating a CentOS 7 VM
To create your first VM pick the "Create VM" in the upper right. This starts a wizard that takes you through the initial configuration as a series of tabs. The "VM ID" is automatically assigned but you should give the VM a meaningful name.In the OS tab you'll need to select the operating system type you are installing. I selected "Linux 3.x/2.6 Kernel(I26)".
The first problem you'll run into is that you have no ISO images to use as a boot medium. You can
rsync
ISO images to /var/lib/vz/templates/iso
and they'll become available momentarily. I downloaded and copied over CentOS-7.0-1406-x86_64-DVD.iso
. The netinstall
version of CentOS 7.0.1406 is problematic in that it does not know what software repositories to use. For the hard drive I created a 24 gigabyte image using the "SATA" Bus type. I used the default
qcow2
image type. These appear to be dynamically sized and grow on disk as needed. I also checked "No backup". ( 1/11/15 - You should use the hard disk type "VIRTIO" here, it has the best KVM performance)If you want to make more processing power available to the guest operating system add more cores. Adding more sockets could make the kernel think it is running in a NUMA environment of some sort. For memory I chose 1024 megabytes. The CPU and memory can both easily be changed later on.
For networking select the default of "Brigded mode" and use the bridge
vmbr0
. This is the default bridge that is created automatically on installation. I have not explored the use of "NAT mode".After that the machine can be booted by selecting it from the list on the left hand side and clicking the "Start" button near the upper right. It will begin the boot sequence. In order to install CentOS 7, you can connect to the terminal by clicking on the "Console" button that is nearby. The VNC terminal worked fine for me in Firefox. It is Java based, and I barely noticed that I was using a web based piece of software. I'm not going to go through the steps I performed to install CentOS 7 here because there is plenty of literature on that topic already.
Create a VM template
You can create a template by converting an existing virtual machine to a template. This process is one-way: a template cannot be converted back into a virtual machine. To make CentOS 7 into a template I did the following.- Install CentOS 7 from the DVD ISO image
- Only set the
root
password during install - Delete the SSH host keys in
/etc/ssh
on boot - Run
sys-unconfig
The Debian Within
The system that gets installed is just Debian. You can SSH into the machine asroot
with the password you gave the installer. Customization
Since the installed system is just a Debian machine you can customize it to do just about anything. I installed thesudo
package, created a user for myself and added the user to the sudo
group. I then edited /etc/ssh/sshd_config
with a line of PermitRootLogin no
. I consider this mandatory, even on machines not exposed to the internet. I also configure apt
to use the instance of apt-cacher-ng
running on my local network.Network configuration
In my case I am using a Realtek integrated NIC that identifies as "Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller". I've used this motherboard under linux exclusively since I purchased it so I did not anticipate any problems. The default network configuration entered during installation is reflected in/etc/network/interfaces
.# cat /etc/network/interfaces auto lo iface lo inet loopback auto vmbr0 iface vmbr0 inet static address 192.168.12.12 netmask 255.255.255.0 gateway 192.168.12.2 bridge_ports eth0 bridge_stp off bridge_fd 0
eth0
directly. This bridge is used as the NIC for the virtual machines,
effectively making them appear like they are plugged into your network.Setting up a second bridge
My goal is to have all of my virtual machines to be on a different subnet than other devices on my network. I also need to avoid manual configuration of IP addresses on the virtual machines. On my DHCP server I added an additional DHCP pool for the192.168.14.0/24
subnet. I use dhcpd
so I added the following to /etc/dhcp/dhcpd.conf
subnet 192.168.14.0 netmask 255.255.255.0 { #30 minutes default-lease-time 1800; #the proxmox host option routers 192.168.14.12; option broadcast-address 192.168.14.255; option subnet-mask 255.255.255.0; option domain-name-servers 192.168.14.95; option domain-name "home.hydrogen18.com"; pool { range 192.168.14.129 192.168.14.254; allow unknown-clients; } }
home.hydrogen18.com
. If you add an interface with an IP address matching one of the pools, dhcpd
automatically starts providing DHCP on that interface. Since I have
plenty of physical bandwidth on my home network I wanted to use VLANs to
keep the VMs separate from other devices. On the machine acting as my
DHCP server I added to /etc/network/interfaces
.auth eth0.14 iface eth0.14 inet static address 192.168.14.95 netmask 255.255.255.0
eth0.X
automatically indicates that the
interface should use a VLAN. This works, but requires that you have the
kernel module for it loaded. You can do that with the following.# modprobe 8021q # echo '8021q' >> /etc/modules
192.168.14.0/24
range. But I still needed a way to place all of the virtual machines on
VLAN 14. To do this I added a bridge for VLAN 14 on the proxmox host.auto vmbr14 iface vmbr14 inet static address 192.168.14.12 netmask 255.255.255.0 bridge_ports eth0.14 bridge_stp off bridge_fd 0
bridge_ports
option of the bridge declaration. In order to get the hosts on 192.168.14.0/24
subnet to intercommunicate with my existing hosts, I needed a device to
act as an IP router. The logical machine for this is the proxmox host.
This is done by turning on IP forwarding in the networking stack of the
linux kernel. It turns out this is already enabled# cat /proc/sys/net/ipv4/ip_forward 1
vmbr0
or vmbr14
. Selecting vmbr14
causes them to receive a DHCP assigned address in the 192.168.14.0/24
subnet.Storage & Filesystem
The installer created 3 partitions on the drive#lsblk /dev/sdb NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sdb 8:16 0 1.8T 0 disk ├─sdb1 8:17 0 1M 0 part ├─sdb2 8:18 0 510M 0 part /boot └─sdb3 8:19 0 1.8T 0 part ├─pve-root (dm-0) 253:0 0 96G 0 lvm / ├─pve-swap (dm-1) 253:1 0 7G 0 lvm [SWAP] └─pve-data (dm-2) 253:2 0 1.7T 0 lvm /var/lib/vz
/boot
filesystem is placed directly on the physical disk. My suspicion is that /boot
was placed on its own partition to support some older systems that needed /boot
to be near the beggining of the disk. Almost any modern linux system can boot off a /boot
partition that is placed anywhere. Furthermore, you can place /boot
in LVM so that it can be mirrored and relocated. The 1 megabyte partition is marked as bios_grub
. The third partition is used as a single physical volume for LVM.--- Physical volume --- PV Name /dev/sdb3 VG Name pve PV Size 1.82 TiB / not usable 0 Allocatable yes PE Size 4.00 MiB Total PE 476804 Free PE 4095 Allocated PE 472709 PV UUID zqLFMd-gsud-dmDD-xyNV-hduA-Lnu2-B1ZF6v
--- Logical volume --- LV Path /dev/pve/swap LV Name swap VG Name pve LV UUID df3swz-RUho-dOzK-XQcm-YjDF-gVXa-fLXo7d LV Write Access read/write LV Creation host, time proxmox, 2015-01-01 10:55:19 -0600 LV Status available # open 1 LV Size 7.00 GiB Current LE 1792 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 --- Logical volume --- LV Path /dev/pve/root LV Name root VG Name pve LV UUID GdPhWd-Dydo-2QY5-UJFd-qp5G-jnMe-A5gMbC LV Write Access read/write LV Creation host, time proxmox, 2015-01-01 10:55:19 -0600 LV Status available # open 1 LV Size 96.00 GiB Current LE 24576 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0 --- Logical volume --- LV Path /dev/pve/data LV Name data VG Name pve LV UUID 3tulMK-XLKM-JcCp-DIBW-1jT5-RBt2-JFHDUL LV Write Access read/write LV Creation host, time proxmox, 2015-01-01 10:55:19 -0600 LV Status available # open 1 LV Size 1.70 TiB Current LE 446341 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2
/dev/pve/data
is mounted as /var/lib/vz
. This is where everything for the virtual machines is stored. The installer gave the majority of the available space to /data
which is a good decision. However, I don't want to use all of my
available space as a filesystem. I want to use logical volumes directly
for some virtual machines.Migrating to mirrored LVM
There are a few things I need to change about the base installation- All the filesystems should be on logical volumes.
- The logical volumes in LVM should be mirrored.
- I should be able to use logical volumes directly for virtual machines
Once in the Debian LiveCD environment you can switch from the default user named
user
to root
with sudo su
. After that you'll need to get LVM started since the LiveCD does not by default.aptitude install lvm2 #Install the LVM modules service lvm2 restart #Restart LVM service udev restart #Restart udev vgmknodes #Map devices for any existing logical volumes
pvcreate /dev/sdx #Change sdx to your second hard drive vgextend pve /dev/sdx #Extend the existing volume group
lvconvert --mirrors 1 --mirrorlog mirrored --alloc anywhere /dev/pve/swap
--mirrors 1
Keep one copy of the data--mirrorlog mirrored
Mirror the log of the logical volume--alloc anywhere
Place the log of the logical volume anywhere
--mirrorlog mirrored
two copies of this metadata are stored on disk.Now lets reduce the size of the data fileystem. In my case I am going to reduce it down to 256 gigabytes in size. Even with several virtual machine templates I wound up with 243 gigabytes of free space after doing this. The
ext4
filesystem already on the logical
volume uses 4096 byte blocks. This means I need to reduce the size to
67108864 blocks. You can check the current number of blocks and the
block size with dumpe2fs
.#Show block size information dumpe2fs -h /dev/pve/root | grep Block
e2fsck
and then resized with resize2fs
#Check the existing filesystem e2fsck -f /dev/pve/data resize2fs -p /dev/pve/data N #Replace 'N' with the number of blocks for the filesystem
resize2fs
is complete the size of the file system has been shrunk but the
physical volume has not. The LVM volume group created by the installer
used 4 megabyte extents. In order to determine how many extents the
physical volume is some calculation must done. If this is done wrong,
the filesystem is destroyed.The above variables are
B
- - The number of extents needed by the logical volume
is calculated you will likely wind up with a number that has a fractional remainder. This number must be rounded up to the next integer value. You can call this number
The logical volume can now be resized to free up the physical extents in the volume group.
lvresize --extents T /dev/pve/data
/boot
. We can't convert the existing /boot
since it is a partition on the physical disk. lvcreate --extents 128 --mirrors 1 --mirrorlog mirrored --nosync --alloc anywhere --name 'boot' pve mkfs.ext4 /dev/pve/boot #Format the block device as ext4
lvcreate
is similar to the syntax used for lvconvert
above. The only thing new is --nosync
.
This tells LVM to create the logical volume as mirrored but not to
synchronize. Since the next step is to create a filesystem on the
logical volume, this is not an issue. The newly created filesystem is
empty. To get the contents of /boot
we need to mount both the old and new filesystems and copy everything over.#mount the old boot filesystem mkdir /mnt/oldboot mount -t ext4 /dev/sdx /mnt/oldboot #replace sdx with old boot partition #mount the new boot filesystem mkdir /mnt/newboot mount -t ext4 /dev/pve/boot /mnt/newboot #copy oldboot to newboot cp -a -P -v -R /mnt/oldboot/* /mnt/newboot/ #unmount the filesystems umount /mnt/oldboot umount /mnt/newboot #wipe the old '/boot' FS dd bs=512 count=4 if=/dev/zero of=/dev/sdx #replace sdx with the old boot partition
/boot
filesystem has been copied over, we need to instruct grub
to boot using the new one. The file /etc/fstab
must be updated to reference the new /boot
as well. This filesystem is mounted by UUID, so use dumpe2fs
to determine the UUID of the new filesytem.#show just the UUID of the filesystem dumpe2fs -h /dev/mapper/boot | grep -i uuid
/etc/fstab
and grub a chroot
environment is used. The /
filesystem of the installation needs to be mounted. You can't mount it to /
however because the live CD environment already mounts a filesystem there. This is why the chroot
is needed. You also need to mount /boot
. This still isn't quite enough. The mount command is used with --bind
to expose the /sys
,/proc
, and /dev
filesystems of the live CD environment to the chroot
.#mount the root filesystem mkdir /mnt/root mount -t ext4 /dev/pve/root /mnt/root #mount newboot in root mount -t ext /dev/pve/boot /mnt/root/boot #bind filesystems into /mnt/root mount --bind /dev /mnt/root/dev mount --bind /sys /mnt/root/sys mount --bind /proc /mnt/root/proc chroot /mnt/root
chroot
environment we can edit /etc/fstab
. You should be able to find a line that looks like this.#Find the line for '/boot/' looks like UUID=1949701c-da21-4aa4-ac9b-9023d11db7c5 /boot ext4 defaults 0 1
UUID=1949701c...
with UUID=xxx
where xxx
is the UUID of the /boot
filesystem we found using dumpe2fs
above.Grub can be reinstalled and updated automatically. There is a good explanation of this process here.
#install grub to the disk grub-install /dev/sdx #device you selected during proxmox install #update the grub configuration update-grub
error: physical volume pv0 not found.
about 30 times when I did this. It doesn't seem to matter. To verify that everything has been updated we can check /boot/grub/grub.cfg
.#verify the UUID set in /boot is now in the configuration grep -m 1 xxx /boot/grub/grub.cfg
xxx
is the UUID of the /boot
filesystem. At least one line should match.Now just type
exit
to leave the chroot
. At this point /data
and /
logical volumes are still unmirrored. LVM can be manipulated while
systems are in use, so there isn't much point in staying the in the
LiveCD environment. Reboot the machine with shutdown -h -r now
and remove the CD when prompted.Once Proxmox boots back up, SSH in as root. You'll want to start a
screen
session before upgrading the logical to mirrored because it can be very time consuming.#upgrade data logical volume to mirrored lvconvert --mirrors 1 --mirrorlog mirrored --alloc anywhere /dev/pve/data #upgrade root filesystem to mirrored lvconvert --mirrors 1 --mirrorlog mirrored --alloc anywhere /dev/pve/root
Enable LVM in the Web Interface
To use LVM volumes from the web interface you must enable LVM as a storage option. This is done by selecting "Server View" then the "Storage" tab. Click the "Add" button and a drop down appears, select the LVM option. You'll need select the volume group you want to use, in my case that is "pve".After adding the volume group you'll have the option of using logical volumes as the storage for virtual machines. You can add a logical volume to an existing virtual machine by clicking it in the left hand pane, clicking the "Hardware" tab and clicking "Add". From the drop down menu select "Hard Disk". The "Storage" option in the modal dialog has the LVM volume group as an option.
The created logical volume has a predictable name. But it is not mirrored
--- Logical volume --- LV Path /dev/pve/vm-103-disk-1 LV Name vm-103-disk-1 VG Name pve LV UUID ib3q66-BY38-bagH-k1Z2-FDsV-kTMt-OKjlMH LV Write Access read/write LV Creation host, time basov, 2015-01-08 19:47:54 -0600 LV Status available # open 0 LV Size 32.00 GiB Current LE 8192 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:36
lvconvert
commands as used to make /dev/pve/root
mirrored.Conclusion
At this point I am still trial running Proxmox. I have a couple things on it but have not moved all of my home infrastructure over. So far I have been happy with it.from http://www.hydrogen18.com/blog/proxmox-home-virtualization.html
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