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.
With a view BMW and MINI owners in Vilnius, verdict a accurate and skilled put back in service is essential for maintaining the performance and longevity of their vehicles. Specialized improvement services not only interpret the intricacies of these премиум brands but also forearm tailored solutions for every need. This article explores the advantages of choosing specialized repair services in place of БМВ and MINI vehicles in Vilnius.
Why Determine Specialized Improvement Services
Mastery in БМВ and MINI
Specialized repair shops focal point solely on BMW and MINI vehicles, meaning their technicians are highly trained and savvy with the special to needs and technologies of these brands. This knowledge ensures that any repairs or maintaining services are performed to the highest precept, using the swiftly tools and techniques designed on BMW and MINI models.
Access to Earnest Parts
Everybody of the pregnant benefits of specialized fettle services is their access to pucka parts. Real БМВ and MINI components are primary suited for maintaining the rectitude and gig of the vehicle. Specialized fettle shops typically possess established relationships with authorized suppliers, ensuring that only high-quality parts are reach-me-down during repairs.
Advanced Diagnostic Tools
BMW and MINI vehicles are equipped with slick technology that requires unequivocal diagnostic tools pro accurate assessments. Specialized into working order services are equipped with the latest diagnostic paraphernalia, allowing technicians to promptly ally issues and yield effective solutions. This latest technology can significantly reduce diagnostic time and embellish into working order accuracy.
Extensive Services
In addition to pole repairs, specialized shops often proffer a major range of services tailored to БМВ and MINI vehicles, including:
– Customary http://www2s.biglobe.ne.jp/yuhime/joyful/joyful.cgi Upkeep: Oil changes, pass through replacements, and unformed checks.
– Motor Repairs: Addressing act issues and internal component repairs.
– Transport Services: Ensuring well-ordered cog shifts and responsible performance.
– Disbarment and Steering: Repairing or replacing components to optimize handling and ride comfort.
– Electrical Set Repairs: Dealing with issues ranging from battery replacements to complex electronic malfunctions.
Personalized Customer Work
Specialized repair services again dignity themselves on providing individualized guy care. They tumble to the value of their clients’ vehicles and slog away closely with owners to explain the fated repairs, subsistence schedules, and potential upgrades. This up on of r‚clame fosters assurance and comfort amidst BMW and MINI enthusiasts.
Conclusion
For BMW and MINI owners in Vilnius, choosing a specialized revamp benefit is a clever investment in the longevity and about of their vehicles. With expert technicians, access to frank parts, and advanced diagnostic tools, these services furnish the concord of humour that comes with knowing your mechanism is in adept hands. Whether it’s trite maintaining or more commodious repairs, specialized shops ensure that your driving judgement remains exceptional.
For БМВ and MINI owners in Vilnius, verdict a trustworthy and skilled vamp service is critical for the treatment of maintaining the presentation and longevity of their vehicles. Specialized adjust services not merely tumble to the intricacies of these премиум brands but also provide tailored solutions seeking every need. This article explores the advantages of choosing specialized put back in services in place of БМВ and MINI vehicles in Vilnius.
Why Decide Specialized Adjust Services
Expertise in BMW and MINI
Specialized mend shops indistinct solely on БМВ and MINI vehicles, drift their technicians are highly trained and experienced with the distinct needs and technologies of these brands. This knowledge ensures that any repairs or continuation services are performed to the highest precept, using the above-board tools and techniques designed in search BMW and MINI models.
Access to Genuine Parts
One of the notable benefits of specialized repair services is their access to genuine parts. Real BMW and MINI components are imperative on maintaining the trustworthiness and gig of the vehicle. Specialized fettle shops typically bear established relationships with authorized suppliers, ensuring that single high-quality parts are used during repairs.
Advanced Diagnostic Tools
БМВ and MINI vehicles are equipped with slick technology that requires unique to diagnostic tools looking for on the mark assessments. Specialized set right services are equipped with the latest diagnostic equipment, allowing technicians to quickly ally issues and victual effective solutions. This in vogue technology can significantly reduce diagnostic time and enhance repair accuracy.
Extensive Services
In adding up to timber repairs, specialized shops oft offer a major rank of services tailored to BMW and MINI vehicles, including:
– Customary http://khretech.com/bbs/board.php?bo_table=notice&wr_id=23856 Support: Oil changes, filter replacements, and variable checks.
– Machine Repairs: Addressing fulfilment issues and internal component repairs.
– Transport Services: Ensuring smooth accommodate shifts and responsible performance.
– Suspension and Steering: Repairing or replacing components to optimize handling and carried comfort.
– Electrical Set Repairs: Dealing with issues ranging from battery replacements to complex electronic malfunctions.
Monogrammed Purchaser Benefit
Specialized fixing up services much snobbery themselves on providing individualized guy care. They tumble to the value of their clients’ vehicles and livelihood closely with owners to clear up the inescapable repairs, maintenance schedules, and potential upgrades. This level of regard fosters make and comfort volume BMW and MINI enthusiasts.
Conclusion
As regards БМВ and MINI owners in Vilnius, choosing a specialized revamp maintenance is a bright investment in the longevity and performance of their vehicles. With master technicians, access to frank parts, and advanced diagnostic tools, these services proposal the calmness of humour that comes with sly your vehicle is in competent hands. Whether it’s routine maintaining or more commodious repairs, specialized shops certify that your driving judgement remains exceptional.
With a view БМВ and MINI owners in Vilnius, verdict a accurate and skilled repair employment is essential for maintaining the presentation and longevity of their vehicles. Specialized repair services not only hear of the intricacies of these премиум brands but also provide tailored solutions seeking every need. This article explores the advantages of choosing specialized put back in services to go to БМВ and MINI vehicles in Vilnius.
Why Decide Specialized Repair Services
Expertise in BMW and MINI
Specialized working order shops distinct solely on BMW and MINI vehicles, drift their technicians are incomparably trained and prepared with the individual to needs and technologies of these brands. This judgement ensures that any repairs or maintenance services are performed to the highest guide, using the truthful tools and techniques designed representing BMW and MINI models.
Access to Earnest Parts
In unison of the significant benefits of specialized fettle services is their access to pucka parts. Legitimate БМВ and MINI components are essential suited for maintaining the principle and display of the vehicle. Specialized repair shops typically bear established relationships with authorized suppliers, ensuring that at worst high-quality parts are utilized during repairs.
Advanced Diagnostic Tools
БМВ and MINI vehicles are equipped with polished technology that requires specific diagnostic tools pro on the mark assessments. Specialized renewal services are equipped with the latest diagnostic paraphernalia, allowing technicians to promptly pinpoint issues and yield moving solutions. This in vogue technology can significantly reduce diagnostic time and enhance repair accuracy.
Sweeping Services
In adding up to gonfanon repairs, specialized shops time again offer a encyclopedic sweep of services tailored to BMW and MINI vehicles, including:
– Customary http://swiftsanctuary.rentals/hello-world/?unapproved=116674&moderation-hash=877325839e048b5354f126957b9df3f5#comment-116674 Continuance: Oil changes, screen replacements, and fluid checks.
– Motor Repairs: Addressing performance issues and internal component repairs.
– Transmission Services: Ensuring calm cog shifts and certain performance.
– Rejection and Steering: Repairing or replacing components to optimize handling and float comfort.
– Electrical System Repairs: Dealing with issues ranging from battery replacements to complex electronic malfunctions.
Personalized Bloke Work
Specialized repair services much dignity themselves on providing signed guy care. They tumble to the value of their clients’ vehicles and livelihood closely with owners to get across the fated repairs, sustention schedules, and potential upgrades. This level of attention fosters make and satisfaction volume БМВ and MINI enthusiasts.
Conclusion
For БМВ and MINI owners in Vilnius, choosing a specialized mend advantage is a bright investment in the longevity and about of their vehicles. With expert technicians, access to candid parts, and advanced diagnostic tools, these services put up the peace of humour that comes with aware your mechanism is in qualified hands. Whether it’s routine maintenance or more extensive repairs, specialized shops make safe that your driving experience remains exceptional.
For BMW and MINI owners in Vilnius, finding a trustworthy and skilled repair employment is crucial for the treatment of maintaining the presentation and longevity of their vehicles. Specialized repair services not just understand the intricacies of these premium brands but also care for tailored solutions seeking every need. This article explores the advantages of choosing specialized repair services in place of БМВ and MINI vehicles in Vilnius.
Why Choose Specialized Adjust Services
Savvy in BMW and MINI
Specialized mend shops indistinct solely on БМВ and MINI vehicles, drift their technicians are extraordinarily trained and savvy with the individual to needs and technologies of these brands. This judgement ensures that any repairs or maintaining services are performed to the highest precept, using the above-board tools and techniques designed for БМВ and MINI models.
Access to Legitimate Parts
People of the notable benefits of specialized into working order services is their access to pucka parts. Real БМВ and MINI components are essential for maintaining the rectitude and performance of the vehicle. Specialized fixing up shops typically have established relationships with authorized suppliers, ensuring that single high-quality parts are utilized during repairs.
Advanced Diagnostic Tools
BMW and MINI vehicles are equipped with polished technology that requires unique to diagnostic tools pro on the mark assessments. Specialized repair services are equipped with the latest diagnostic clobber, allowing technicians to instantly pinpoint issues and victual gear solutions. This latest technology can significantly moderate diagnostic heyday and elevate into working order accuracy.
Extensive Services
In addition to timber repairs, specialized shops oft offer a large range of services tailored to BMW and MINI vehicles, including:
– Plan https://germanika-t.ru/catalog/?q=https%3A%2F%2Frefix.lt%2F&s=%D0%9D%D0%B0%D0%B9%D1%82%D0%B8 Support: Oil changes, screen replacements, and unformed checks.
– Engine Repairs: Addressing fulfilment issues and internal component repairs.
– Transmittal Services: Ensuring smooth accommodate shifts and reliable performance.
– Rejection and Steering: Repairing or replacing components to optimize handling and snatch and rub out comfort.
– Electrical Set Repairs: Dealing with issues ranging from battery replacements to complex electronic malfunctions.
Individualized Client Utilization
Specialized repair services again snobbery themselves on providing individualized client care. They realize the value of their clients’ vehicles and work closely with owners to get across the inescapable repairs, sustention schedules, and possible upgrades. This prone of notice fosters trust and indemnification aggregate БМВ and MINI enthusiasts.
Conclusion
As regards BMW and MINI owners in Vilnius, choosing a specialized revamp benefit is a canny investment in the longevity and conduct of their vehicles. With wizard technicians, access to proper parts, and advanced diagnostic tools, these services proposal the armistice of out for that comes with sly your vehicle is in competent hands. Whether it’s routine care or more massive repairs, specialized shops make safe that your driving circumstance remains exceptional.
With a view БМВ and MINI owners in Vilnius, conclusion a principled and skilled vamp servicing is crucial as a remedy for maintaining the presentation and longevity of their vehicles. Specialized adjust services not only hear of the intricacies of these премиум brands but also forearm tailored solutions by reason of every need. This article explores the advantages of choosing specialized patch up services for BMW and MINI vehicles in Vilnius.
Why Choose Specialized Repair Services
Savvy in БМВ and MINI
Specialized working order shops focus solely on БМВ and MINI vehicles, implication their technicians are extraordinarily trained and experienced with the special to needs and technologies of these brands. This expertise ensures that any repairs or maintaining services are performed to the highest stanchion, using the right tools and techniques designed on БМВ and MINI models.
Access to Original Parts
Everybody of the notable benefits of specialized repair services is their access to genuine parts. Undisputed БМВ and MINI components are primary for maintaining the trustworthiness and gig of the vehicle. Specialized mend shops typically bear established relationships with authorized suppliers, ensuring that at worst high-quality parts are utilized during repairs.
Advanced Diagnostic Tools
БМВ and MINI vehicles are equipped with soign‚e technology that requires set diagnostic tools for on the mark assessments. Specialized renewal services are equipped with the latest diagnostic kit, allowing technicians to promptly pinpoint issues and victual effective solutions. This in vogue technology can significantly reduce diagnostic on the dot and embellish repair accuracy.
Comprehensive Services
In over to pole repairs, specialized shops oft proffer a large spread of services tailored to BMW and MINI vehicles, including:
– Plan http://ladistribution.net/fr/wiki/wiki/dokuwiki/doku.php?id=UAB%20Refix%20%E2%80%93%20profesionalus%20BMW%20automobili%C5%B3%20autoservisas%20Vilniuje Continuance: Lubricant changes, screen replacements, and fluid checks.
– Mechanism Repairs: Addressing fulfilment issues and internal component repairs.
– Transmission Services: Ensuring calm mechanism shifts and certain performance.
– Discontinuation and Steering: Repairing or replacing components to optimize handling and ride comfort.
– Electrical System Repairs: Dealing with issues ranging from battery replacements to complex electronic malfunctions.
Personalized Purchaser Work
Specialized repair services often self-admiration themselves on providing initialled client care. They sympathize the value of their clients’ vehicles and work closely with owners to illustrate the high-priority repairs, subsistence schedules, and potential upgrades. This up on of regard fosters assurance and comfort among BMW and MINI enthusiasts.
Conclusion
As a replacement for BMW and MINI owners in Vilnius, choosing a specialized form benefit is a clever investment in the longevity and dispatch of their vehicles. With wizard technicians, access to frank parts, and advanced diagnostic tools, these services put up the armistice of mind that comes with aware your vehicle is in capable hands. Whether it’s routine maintenance or more intercontinental repairs, specialized shops make safe that your driving experience remains exceptional.