{"id":3260,"date":"2021-09-25T09:49:14","date_gmt":"2021-09-25T08:49:14","guid":{"rendered":"https:\/\/kudzia.eu\/b\/?p=3260"},"modified":"2021-12-25T19:14:42","modified_gmt":"2021-12-25T18:14:42","slug":"booting-kvm-vm-from-an-iso-image","status":"publish","type":"post","link":"https:\/\/kudzia.eu\/b\/2021\/09\/booting-kvm-vm-from-an-iso-image\/","title":{"rendered":"booting KVM VM from an iso image"},"content":{"rendered":"

let’s say you have a vm, maybe with debian. and that vm stopped booting, maybe because of grub corruption. what do you do?<\/p>\n

\r\nvirsh destroy nameOfVM\r\nvirsh edit nameOfVM\r\n<\/pre>\n
add under devices – for pc-i440fx arch:<\/p>\n
\r\n <disk type='file' device='cdrom'>\r\n   <driver name='qemu' type='raw'\/>\r\n   <source file='\/mnt\/storage0\/iso\/debian-10.8.0-amd64-netinst.iso'\/>\r\n   <target dev='hdc' bus='ide'\/>\r\n   <readonly\/>\r\n   <address type='drive' controller='0' bus='1' target='0' unit='0'\/>\r\n <\/disk>\r\n<\/pre>\n
and for pc-q35-3.1:<\/p>\n
\r\n <disk type='file' device='cdrom'>\r\n  <driver name='qemu' type='raw'\/>\r\n  <source file='\/mnt\/storage0\/iso\/debian-10.11.0-amd64-netinst.iso'\/>\r\n  <backingStore\/>\r\n  <target dev='sdb' bus='sata'\/>\r\n  <readonly\/>\r\n  <address type='drive' controller='0' bus='0' target='0' unit='1'\/>\r\n <\/disk>\r\n<\/pre>\n
then in the os section change boot from dev=’hd’ to dev=’cdrom’:<\/p>\n
\r\n<os>\r\n  <type arch='x86_64' machine='pc-i440fx-3.1'>hvm<\/type>\r\n  <boot dev='hd'\/>\r\n<\/os>\r\n<\/pre>\n
then <\/p>\n
\r\nvirsh define \/etc\/libvirt\/qemu\/nameOfVM.xml\r\nvirsh start nameOfVM\r\n<\/pre>\n
also – this article<\/a> describes how to go back from gpt to mbr \/ msdos disk partition definition. i hope this one ends my endless problems with GRUB on KVM VMs occasionally getting stuck and preventing VM boot.<\/p>\n","protected":false},"excerpt":{"rendered":"
let’s say you have a vm, maybe with debian. and that vm stopped booting, maybe because of grub corruption. what do you do? virsh destroy nameOfVM virsh edit nameOfVM add under devices – for pc-i440fx arch: <disk type=’file’ device=’cdrom’> <driver name=’qemu’ type=’raw’\/> <source file=’\/mnt\/storage0\/iso\/debian-10.8.0-amd64-netinst.iso’\/> <target dev=’hdc’ bus=’ide’\/> <readonly\/> <address type=’drive’ controller=’0′ bus=’1′ target=’0′ unit=’0’\/> <\/disk> […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17,51],"tags":[49],"class_list":["post-3260","post","type-post","status-publish","format-standard","hentry","category-tech","category-unimportant","tag-kvm"],"_links":{"self":[{"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/posts\/3260","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/comments?post=3260"}],"version-history":[{"count":4,"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/posts\/3260\/revisions"}],"predecessor-version":[{"id":3287,"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/posts\/3260\/revisions\/3287"}],"wp:attachment":[{"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/media?parent=3260"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/categories?post=3260"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/kudzia.eu\/b\/wp-json\/wp\/v2\/tags?post=3260"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}