Ubuntu 22.04

 Triviality  Comments Off on Ubuntu 22.04
Apr 262022

Ubuntu 22.04 was just released, I managed to upgrade my WordPress site (running on VM and only publish static site), it was not as smooth as I thought, there were quite some small problems here and there, but eventually it worked after like 4 hours of troubleshooting, and so on.

As a side note, I no longer running Parallels since I found it tricked me to subscription which involves $79.99 per year, luckily I noticed the weird charge on my credit card so was able to cancel it the same day. I’m running my VM on UTM now, I didn’t notice performance difference between UTM and Parallels, though Parallels does provide more convenient features like desktop integration, snapshot, etc.

I think I’ve been running Ubuntu since 10.04, but I’m seriously thinking of moving away from it now due to snap, there are more and more applications over Ubuntu dropped deb support and are solely on snap only, I don’t mind a distro changes its package management tool like yum to dnf, but I just don’t want to have 2 package management mechanism at the same time.

I may not run Fedora as I need LTS, I cannot choose Rocky as it (actually RHEL) lacks of aarch64 support. Most likely I’m going to play with Debian or Arch.

Aug 072012

Time to play with Virutalization again, this time I’m using kvm on CentOS 6, which has pretty many documentation but do need to pay more attention on details – I was locked out of the box last night after changing the network setting (with mistakes for sure 🙁 ), this should be avoided for anyone who’s going to do this. Again, stay beside your machine whenever you are to do the initial setup.

After network setup is done, everything else is pretty smoothy, just need to read lots of man pages to know syntax of those qemu and virt-* commands. I repeated several times by virt-install, then virsh destroy and virsh undefine, etc., then virt-install again. There should be some better way to change configuration for existing VMs but for me, it’s much more easier to run from scratch.

Now I have 4 VMs running on a 8-cores/32G box, it seems everything’s OK so far, but I need to do some more tests – especially performance test – before carrying on.

BTW, a VNC viewer plus ssh tunnel is a must to do the setup, since I still haven’t figure out how to auto-installation, i.e. touchless, or installation without manually involve the process.

Jan 172010

Just found that I didn’t do any research to compare Xen and kvm, obviously two are both announcing they perform much better than VMWare, which I believe that’s true, but I haven’t read anything about xen vs. kvm yet.

Will post something here – but I won’t do my own comparison as it will be too much to me.

Nov 202009

I recently spent lot of time on reading articles from Linux Magazine, as it always introduce pretty new (or not new, but less known) technology and products, this time it is Proxmox, an open source virtualization product.

I’m running VMWare Go at home at this moment, but I failed to solve the license issue and every 60 days I have to re-install everything. I guess I got the wrong ISO, so what I installed was actually for vSphere, but I just don’t want to spend too much time on digging it out as obviously VMWare does not want people get the right solution easily.

Xen is another story, at least to me it is not easy to use, maybe next version will be easier (I should take a try either but I lack of machines …). Also, I still have this impression that running Ubuntu with Xen is painful as it is, kind of, tightly bundled with RedHat distro.

Now here comes Proxmox which seems promising, I will take a try today (may be weekend as well) and then if it works I will stick with it, but if not … I will try out Xen.

Let’s see.

Nov 182009

I used to run 4 VMs on my dual core machine but actually was running nothing seriousely. A while back I read an article from Ubuntu about its cloud setup, mentioning you should not run VMs more than number of cores you have, I was laughing at the article at that time, since it sounds ridiclous – as long as CPU can handle the load, we should run as many VMs as possible and – the bottleneck seems coming freom memory to me.

Obviously I was wrong. Once I started testing Casasandra, I got lots of timeouts from 4 VMs, I checked memory, there was no problem at all, i.e. every VM’s memory is in physical memory. I was also doubt Ubuntu is not doing as good as Fedore, obviously Iwas wrong either, then I recalled the article, shut down 2 VMs and … you know, things work like a chime.

There could be saomew thesis telling why CPU is the bottleneck, but I don’t have time to dig it out, the most important lesson I took from this case is, don’t take anythingn in granted, respect preofessional advices