I’m verifying my backup process via a bare metal recovery to identical hardware so I thought I’d take some notes…<\/p>\n
I got started on my ubuntu xen xcp\/xapi setup with this excellent guide:
http:\/\/francispereira.com\/blog\/step-by-step-guide-to-setting-up-xen-and-xenapi-xcp-on-ubuntu-12-04-and-managing-it-with-xencenter\/<\/p>\n
Booted a usb based rescue disk to partition my disks the same as oringinal dom0, then rsync over the stuff from my dom0 rsnapshot, created \/dev \/proc and \/sys directories, mounted them with –bind and then chrooted on to the actual partition to rebuild grub<\/p>\n
sudo grub-install \/dev\/sdb<\/pre>\n\nsudo grub-install --recheck \/dev\/sdb<\/pre>\n\nsudo update-grub<\/pre>\nThen umounted things and rebooted, and volia… but networking wasn’t happy… after some banging around I discovered my old nemesis the udev persistent crap, who ever thought of this has some explaining to do, how could this have ever been worth it? Maybe I’m just not in the use case where it’s good for my network adapter to seemingly randomly stop working. None the less, a quick<\/p>\n
rm of \/etc\/udev\/rules.d\/70-persistent-net.rules<\/pre>\nand a reboot and things were back to the way they should be. (also updated my rsnapshot exclude list so I can forget about udev for a while).<\/p>\n
UPDATE<\/strong>(9\/3\/12): just booted the box and realized that it was unhappy about UUIDs of the new filesystems (\/dev\/sda1 (root) and \/dev\/sda2 (swap) in my case so some grub editing was needed to boot, and then also updating of \/etc\/fstab and running update-grub.<\/p>\n
With xen xcp-xapi on ubuntu we’re pretty much off book so for this portion of the restore I’m planning to clean things out, create a new LVM, and then import from basic generic vxa images, and then restore domU data\/settings from rsnapshot.<\/p>\n
I cleaned out the xe setup with a number of commands including xe sr-forget, xe vm-destroy, xe pbd-unplug, xe pdb-destroy, xe vdi-destroy, and xe vbd-destroy, also the -list version of the above helps to identify what to destroy.<\/p>\n
I recreated the LVM (synopsis of steps from above guide).<\/p>\n
fdisk, n, p, 3, , t, 8e, W. #(use the rest of the disk)<\/pre>\n\npvcreate \/dev\/sda3<\/pre>\n\nvgcreate VolumeGroup \/dev\/sda3<\/pre>\n\npvdisplay #(get size from here)<\/pre>\n\nlvcreate --size G -n LocalStorage VolumeGroup<\/pre>\n\nxe sr-create type=ext name-label=Local Storage device-config:device=\/dev\/mapper\/VolumeGroup-LocalStorage<\/pre>\nNext I set the recently created sr as the default SR and imported a vxa. then used nmap to find it, as that’s faster way to find it than logging in to my wrt.<\/p>\n
xe sr-list<\/pre>\n\nxe pool-list<\/pre>\n\nxe pool-param-set uuid= default-SR=<\/pre>\n\nxe vm-import filename=.vxa<\/pre>\n\nxe vm-start vm=<\/pre>\n\nnmap -PN -sS 10.0.0.0\/24 192.168.1.0\/24<\/pre>\nI then rsync’ed the domU settings\/data back and rebooted. I use the -anv in order to see what it’s going to do before it mucks things up…<\/p>\n
rsync -anv --delete --exclude-from= . host:\/|less<\/pre>\nrsync -a -delete --exclude-from= . host:\/<\/pre>\nupdate<\/strong>(9\/3\/12): also snapshots weren’t working as I needed to specify the default SR<\/p>\n
xe sr-list<\/pre>\n\nxe pool-list<\/pre>\n\nxe pool-param-set suspend-image-SR= uuid=<\/pre>\nThings I learned:<\/p>\n
\n
- good to have the output of fdisk<\/li>\n
- I still really hate the udev permanent ethernet crap<\/li>\n
- bunch of xe commands<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"
I’m verifying my backup process via a bare metal recovery to identical hardware so I thought I’d take some notes… I got started on my ubuntu xen xcp\/xapi setup with this excellent guide: http:\/\/francispereira.com\/blog\/step-by-step-guide-to-setting-up-xen-and-xenapi-xcp-on-ubuntu-12-04-and-managing-it-with-xencenter\/ Booted a usb based rescue disk to partition my disks the same as oringinal dom0, then […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[2],"tags":[114,119,139,154,155,158],"class_list":["post-26","post","type-post","status-publish","format-standard","hentry","category-rln","tag-recovery","tag-rsnapshot","tag-ubuntu","tag-xapi","tag-xcp","tag-xen"],"_links":{"self":[{"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=\/wp\/v2\/posts\/26","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=26"}],"version-history":[{"count":0,"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=\/wp\/v2\/posts\/26\/revisions"}],"wp:attachment":[{"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=26"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=26"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/randomlinuxnotes.d13.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=26"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}