It’s been close to a year since I updated our cluster; I was going to do it over Christmas, but never quite got around to it. The period of social distancing (and procrastinating on my research) is a great time, right? The cluster is running Centos 7. The biggest issue with upgrading it is the Lustre file system. These are all my notes on the upgrade process. I’m hoping by writing them down here, my life will be somewhat easier the next time I need to do this. Learning how Lustre works all over again every time I do an update is an involved process!
Lustre is very picky about the version of the Linux kernel. This means we can’t just do a blanket “sudo yum update” on the system. We need to upgrade to the specific kernel version that is required by the new version of Lustre we will be installing.
On wyeast, the Lustre server is installed across three different nodes: wyeast-lustre01, wyeast-lustre02, and wyeast-lustre03. The metadata server is on the first node, and the object storage targets are stored on lustre02 and lustre03.
First, update the list of updates that yum knows about:
sudo yum makecache
Next, look at the lustre-server repo and find the current version of the Lustre server and the Linux kernel it uses.
sudo yum repo-pkgs lustre-server list
From this, I found that the current Lustre server version is 2.12.4. I checked the changelog on lustre.org to determine the kernel version needed:
http://wiki.lustre.org/Lustre_2.12.4_Changelog
The Linux kernel needed is actually available in the Lustre-server repo:
kernel-3.10.0-1062.9.1.el7_lustre
So I needed to make sure to install that particular version and not the most up-to-date kernel.
sudo yum repo-pkgs lustre-server update kernel-3.10.0-1062.9.1.el7_lustre kernel-devel-3.10.0-1062.9.1.el7_lustre kernel-headers-3.10.0-1062.9.1.el7_lustre
After that, I checked the current list of other updates available in the Lustre server repository.
sudo yum repo-pkgs lustre-server list
Next, I updated all the Lustre packages that were already installed:
sudo yum repo-pkgs lustre-server update kmod-lustre.x86_64 kmod-lustre-osd-ldiskfs.x86_64 libnvpair1.x86_64 libuutil1.x86_64 libzfs2.x86_64 libzpool2.x86_64 lustre.x86_64 lustre-osd-ldiskfs-mount.x86_64 lustre-osd-zfs-mount.x86_64 lustre-resource-agents.x86_64 lustre-zfs-dkms.noarch spl.x86_64 spl-dkms.noarch zfs.x86_64 zfs-dkms.noarch
Finally, I’ll update all the other system software, carefully excluding the Linux kernel packages:
sudo yum -x kernel,kernel-headers,kernel-debug-devel,kernel-tools,kernel-tools-libs,kmod-lustre.x86_64,kmod-lustre-osd-ldiskfs.x86_64,libnvpair1.x86_64,libuutil1.x86_64,libzfs2.x86_64,libzpool2.x86_64,lustre.x86_64,lustre-osd-ldiskfs-mount.x86_64,lustre-osd-zfs-mount.x86_64,lustre-resource-agents.x86_64,lustre-zfs-dkms.noarch,spl.x86_64,spl-dkms.noarch,spl-dkms.noarch,zfs.x86_64,zfs-dkms.noarch,kernel-devel update
That completes all the software upgrades. The same process needs to be done on wyeast-lustre02 and wyeast-lustre03. I probably should have umounted Lustre mounts before this process, but I didn’t. So after the reboot, Lustre wasn’t quite working. I had to fix it.
First, I had to fix the firewall again on the Lustre machines:
sudo iptables -F
Next, zfs (the file system used by Lustre) was messed up on wyeast-lustre01 and wyeast-lustre02.
The command:
zfs list
wasn’t working. It showed that zfs wasn’t loaded. So the first step is to do:
modprobe zfs
This loaded zfs. However, our zfs pools are missing. This command fixed that:
zpool import
This finds the zpools and allows them to be imported:
zpool import lustre-ost0/ost0
zpool import lustre-ost0/ost0
This loads the zfs pools, but I still need to remount the Lustre file system. This needs to be done on the object storage targets first (lustre02 and lustre03) before it is done on the metadata server (lustre01).
sudo mount -t lustre lustre-ost0/ost0 /lustre-ost0/ost0
sudo mount -t lustre lustre-ost1/ost1 /lustre-ost1/ost1
Lustre actually automounted correctly on Lustre03, so I didn’t have to fix anything. With the targets working, it was time to fix Lustre01:
mount -t lustre lustre-mgsmdt/mgsmdt /lustre-mgsmdt/mgsmdt
Mounting the Lustre file system starts the Lustre service and we are off to the races.
Back on the compute nodes, it wasn’t finding the Lustre mount on the head node. So I had to unmount and then remount Lustre.
First, when I tried to unmount Lustre, the file system was reported as busy. So I ran the following command the find the guilty processes:
sudo lsof +f -- /lustre
This gives me a list of processes that I was then able to kill off. After that:
sudo umount /lustre
Followed by:
sudo mount -t lustre 192.168.1.11@tcp:/lustre /lustre
Which worked! Although I hadn’t yet updated the Lustre client, it was still able to handle the updated Lustre server. The other nodes that didn’t have active shells attached to them didn’t have any trouble with the change; I didn’t even have to remount them; the file system just showed up without any trouble.
Next step is to update the software on the compute nodes. Similar process except somewhat easier since we don’t have to deal with zfs. I still want to limit the install to the particular Linux kernel and the “Lustre-client” repo. In this case, I had to download the rpms from rpmfind:
https://rpmfind.net/linux/rpm2html/search.php?query=kernel%28×86-64%29&submit=Search+…&system=&arch=
I downloaded RPMs for kernel, kernel-debug-devel, kernel-headers, kernel-tools, and kernel-tools-libs. This time, I remembered to unmount /lustre first. Then I installed the new kernel modules:
Then, to install them:
sudo yum localinstall kernel-3.10.0-1062.9.1.el7.x86_64.rpm kernel-debug-devel-3.10.0-1062.9.1.el7.x86_64.rpm kernel-headers-3.10.0-1062.9.1.el7.x86_64.rpm kernel-tools-3.10.0-1062.9.1.el7.x86_64.rpm kernel-tools-libs-3.10.0-1062.9.1.el7.x86_64.rpm
Next, update the Lustre client:
sudo yum repo-pkgs lustre-client update kmod-lustre-client.x86_64 lustre-client.x86_64
Then update everything else, excluding the kernel stuff:
sudo yum update -x kernel,kernel-debug-devel,kernel-headers,kernel-tools,kernel-tools-libs
Finally, reboot and then remount Lustre:
sudo mount -t lustre 192.168.1.11@tcp:/lustre /lustre
Unlike with the Lustre server, I didn’t encounter any trouble with the reboot. The Lustre partition survived the update just fine, and I was able to successfully update all the rest of the installed software on the system.
Exploring Hellcase in France: A Comprehensive Pilot to CS:TOUR Skins and More
Counter-Strike: International Disgusting (CS:BE DISMISSED) has continued to nab the hearts of gamers worldwide since its liberating in 2012. Magnitude the many ways players embark on with the game is finished with the in demand case-opening locale, Hellcase. In this article, we thinks fitting search Hellcase, specifically in the surround of the French gaming community, discussing its features, benefits, and the intricacies of acquiring and trading CS:GO skins.
What is Hellcase?
Hellcase is a prominent husk gambling and case-opening platform tailored suited for CS:SET UPON E SET ONE’S SIGHTS ON players. It allows users to purchase essential cases containing unplanned in-game skins, which can change in scarcity and value. Players can capitalize on truthful currency or effective credits earned from gameplay to come by these cases and potentially be relevant rare and valuable skins.
Why Hellcase is Understandable in France
Thriving Gaming Community
France has a vibrant gaming community, with a great information of eSports and FPS games. CS:GIVE ACCESS TO has a critical following in the country, bolstered not later than the self-possession of well-known teams and typical tournaments. Hellcase provides an astounding scheme for the treatment of French gamers to enhance their gameplay experience during acquiring unique skins that can sketch their personality or favorite teams.
Distinct Hide Gleaning
One of the most appealing aspects of Hellcase is the wide compass of CS:LEAVE skins available. From conventional items to rare collectibles, players comprise the chance to be in vogue skins that not exclusive look extraordinary but also take real-world value. Some players in France representation these skins as investments, while others austerely derive pleasure the aesthetic appeal.
Appealing Features
Hellcase offers a few features that oblige it take the side of out from other case-opening sites. These classify:
– Available Cases: Users can earn unrestricted cases with unfailing limitations, allowing trendy players to seek their luck without spending money.
– Constantly Bonuses: Unvarying users can profit from daily bonuses, encouraging them to return to the orientation and increasing their chances of pleasant valuable skins.
– Upgrades and Trading: Hellcase provides options to players to upgrade their skins or employment them with others, fostering a sense of community among users.
Legality and Protection Concerns
When open Hellcase Promo Code Free Money with sites like Hellcase, French players should be aware of the legit and safeness aspects bordering online gambling and trading. The French management has strict regulations in reference to online gambling, and it is crucial to confirm that any platform used is legitimate and adheres to these regulations.
Furthermore, players should prioritize their online safety close using two-factor authentication and keeping bosom information restricted while trading or purchasing skins. Hellcase has established a noted representing being proper and solid, but players should continually exercise caution.
Settled Thoughts
Hellcase has carved a slot for itself within the CS:GO community in France, providing an engaging stand for the benefit of integument enthusiasts and gamers alike. With its assorted orbit of features, everyday bonuses, and community engagement, it’s no mind-blower that players assembly to this site.
As the CS:GO community continues to broaden, platforms like Hellcase resolution play an necessary role in shaping the gaming experience. Whether you’re a acclimatized musician or principled starting your tour in CS:BRAVE B BE ACCEPTED, Hellcase offers an intoxicating avenue to review the coterie of skins and increase your gameplay.
If you’re in France and looking to dive into the the human race of CS:GO skins, Hellcase is clearly importance checking out. Nothing but think back on to depict responsibly and press nonsense!