JDPFu.com 2025

My old backup method was a little cumbersome. To ensure a good backup set, I’d take down the virtual machine, mount the VM storage on the host (Xen), then perform an rdiff-backup of the entire file system, before bringing the VM back up again. This happened daily, automatically, around 3:30am. It has been working for over 3 years with very few hiccups. I’ve had to restore entire VMs and that has worked too. One day I needed to restore the Zimbra system ASAP. From the time I decided to do the restore until end-users could make use of the system was 20 minutes. That’s pretty sweet in my book.

There are some issues with the current setup.

• Backups are performed locally, to a different physical disk before being rsync’ed to the backup server. This is necessary because the backup tool versions are different and incompatible between Ubuntu 8.04 and 10.04 LTS servers.
• Each system is completely shutdown for some period of time during the backup process. It is usually 1-4 minutes, but still that is downtime.
• Most of the systems are still using 8.04 paravirtual machines under Xen. A migration of some type is needed to a newer OSes. I should use this opportunity to make things better.
• Some of the systems are running old versions of software which are not up to current patch levels. I guess this happens in all IT shops. None of that is available outside the VPN, so the risks are pretty low.

think I can do better.

Below is the 2nd of 6 questions from a reader. I definitely don’t have all the answers, but I’m not short on opinion. ;)

Part 1 – LVM+JFS+RAID | Part 2 – Service Virtualization | Part 3 – Virtualizing Media Storage | Part 4 – Hosting Email

duijf asks:

Q2: I read everywhere about Virtualisation, should I directly install packages to the base system to provide services, or should I virtualise all services? What are the advantages here?

Advantages of Virtualization

The list of advantages is long, but with those advantages comes a few disadvantages. I cannot hope to point out all the advantages, so I’ll limit it to just the main ones.

I like rdiff-backup to backup your HOME directories and Virtual Machines efficiently. Ok, that is a little understated, I LOVE rdiff-backup.

So, every 6 months or so, when it lets me down in some way, I have to recall all the good things that is actually does solve. Things like:

• Efficient backup times; just a few minutes to backup entire virtual machines
• Efficient backup storage; about 10% more storage for 30 days of backups than a mirror (rsync) uses.
• Easy recovery for 1 file from the latest backup (really it is trivial, just a file copy)
• Easy recovery of a complete backup set from X days ago (I’ve tested this more than I like)
• Easy to get information about backup increments and sizes for each.
• FLOSS software from GNU (not commercial)
• Backup failures get rolled back – you always get a complete, clean set.
• No screwing around with SQL databases or other less than easy to understand crap.

How to ask for help for Linux issues.

All of us need a little help now and again. Linux users aren’t any different than MS-Windows or Mac users in that regard. The difference is that to get help for Linux, you need to do a little more research first.

We’ll assume you don’t have a nearby Linux knowledgeable friend that knows everything. You’ll need to ask people you do not know for help. Or, perhaps you are the Linux guru in your circle of friends and your questions are more complex than most.

Below, I’ll suggest a few methods to use to get help and outline the data you should include in your requests to optimize the ability of others to actually be helpful to you.

Xen as a Dom0 is not supported in Ubuntu 10.04 (Lucid Lynx) by Canonical. Both Canonical and Redhat have decided to get behind the KVM virtualization method instead. I think this was a choice driven by the required maintenance effort, since KVM hooks have been in the baseline Linux Kernel for about a year and Xen inclusion into the Linux kernel doesn’t seem likely at any point in the future. Supporting Xen kernels is just too tough.

I use virtualization … a lot. I started writing an article entitled Converting WinXP from VirtualBox to KVM today, but couldn’t due to issues.

The latest thing I’m trying to accomplish is to migrate to KVM for all the current VM needs that I have. This may not be a good idea since we’re running Xen, VirtualBox and ESXi VM hosts. Today I attempted to convert a WindowsXP Professional install running under VirtualBox 3.x to KVM. I’ve attempted this conversion before, but it failed, badly. This time, I’m using VMware Converter and it failed before it even got started.

The last few days, I’ve been playing with Ubuntu Server 9.10. It hasn’t been perfect. There have been problems along the way. So everyone else knows the issues, I’ll list a few here with a little detail.

It all started during the Server 9.10 x64 installation.

Be certain to check out the comments for solutions to issues as I discover them.

Nothing really to report this week. Doing RMA stuff on an old Antec 550W PSU and getting an estimate to fix the Dell laptop.

This is a series of articles around building a new Intel Core i5 server for use in a small business. Please start with New Server Build Part 1

• Part 1 – Parts is Parts
• Part 2 – Build
• Part 3 – Burn In and OS
• Part 4 Conclusion

In Part 3, I ran a few tests. They all completed cleanly.

Lilo / XFS

I’ve needed to build a new server for about 6 months, but delayed spending the money as long as possible. I’ll be reusing many old components and have purchased the main new items listed below.

• Part 1 – Parts is Parts
• Part 2 – Build
• Part 3 – Burn In and OS
• Part 4 Conclusion

Server Purpose