** Description changed: + == Begin SRU Information == + [General Description] + Amazon's EC2 is a xen based cloud platform, the bootloader that is used is 'pvgrub'. pvgrub runs inside a xen instance, reads a /boot/grub/menu.lst file, and loads the kernels specified there. It does not support grub2 style configuration (/boot/grub/grub.cfg). Thus, we have installed inside cloud-images, a package named 'grub-legacy-ec2' that maintains /boot/grub/menu.lst. + + grub-legacy-ec2 does not simply assume all kernels are candidates for + inclusion in /boot/grub/menu.lst. Instead, it has some very basic + whitelist metrics. Those previously required a kernel to end in + '-virtual'. + + In the development cycle of 12.10, the -virtual kernel went away. It is + now simply a -generic kernel with a subset of modules. + + [Impact] + In 12.04, it is now supported to run a 12.10 "backports kernel". These new kernels will be named in the newer fashion, and will end in '-generic', rather than '-virtual'. As a result, grub-legacy-ec2's whitelist will not write entries for these kernels to /boot/grub/menu.lst. + + The end result is that the user who installs these kernels will not be + able to easily boot them on EC2 (or other xen guest). + + [Test Case] + * Boot a cloud instance or cloud image + * install a backports kernel + * verify that kernel new kernel is included in /boot/grub/menu.lst + Previously the kernel would not be included there. + + [Regression Potential] + The biggest potential for regression would be in writing an entry to /boot/grub/menu.lst for a kernel that would not boot. There is protection against this in the included patch by checking the version number as well as the name. + + That amounts to: + dpkg --compare-versions ${ver_flavor%-generic} ge 3.4.0-3 && return 0;; + where 'ver_flavor' is the version as found in the file name of the kernel (ie, /boot/vmlinux-2.6.35-13-generic). + == End SRU Information == + Quantal stopped booting on EC2 around 2012-05-25. ben@padfoot:~$ ec2-get-console-output -i i-75727213 Required parameter 'INSTANCE' missing (-h for usage) ben@padfoot:~$ ec2-get-console-output i-75727213 i-75727213 2012-05-28T14:17:49+0000 Xen Minimal OS! - start_info: 0xb10000(VA) - nr_pages: 0x6a400 - shared_inf: 0x001a5000(MA) - pt_base: 0xb13000(VA) + start_info: 0xb10000(VA) + nr_pages: 0x6a400 + shared_inf: 0x001a5000(MA) + pt_base: 0xb13000(VA) nr_pt_frames: 0x9 - mfn_list: 0x967000(VA) - mod_start: 0x0(VA) - mod_len: 0 - flags: 0x0 - cmd_line: root=/dev/sda1 ro 4 - stack: 0x946780-0x966780 + mfn_list: 0x967000(VA) + mod_start: 0x0(VA) + mod_len: 0 + flags: 0x0 + cmd_line: root=/dev/sda1 ro 4 + stack: 0x946780-0x966780 MM: Init - _text: 0x0(VA) - _etext: 0x61e65(VA) - _erodata: 0x76000(VA) - _edata: 0x7b6d4(VA) + _text: 0x0(VA) + _etext: 0x61e65(VA) + _erodata: 0x76000(VA) + _edata: 0x7b6d4(VA) stack start: 0x946780(VA) - _end: 0x966d34(VA) - start_pfn: b1f - max_pfn: 6a400 + _end: 0x966d34(VA) + start_pfn: b1f + max_pfn: 6a400 Mapping memory range 0xc00000 - 0x6a400000 setting 0x0-0x76000 readonly skipped 0x1000 MM: Initialise page allocator for e6c000(e6c000)-0(6a400000) MM: done Demand map pfns at 6a401000-7a401000. Heap resides at 7a402000-ba402000. Initialising timer interface Initialising console ... done. gnttab_table mapped at 0x6a401000. Initialising scheduler Thread "Idle": pointer: 0x7a402008, stack: 0x6a030000 Initialising xenbus Thread "xenstore": pointer: 0x7a402478, stack: 0x6a040000 Dummy main: start_info=0x966880 Thread "main": pointer: 0x7a4028e8, stack: 0x6a050000 - "main" "root=/dev/sda1" "ro" "4" + "main" "root=/dev/sda1" "ro" "4" vbd 2049 is hd0 ******************* BLKFRONT for device/vbd/2049 ********** - backend at /local/domain/0/backend/vbd/126/2049 Failed to read /local/domain/0/backend/vbd/126/2049/feature-barrier. Failed to read /local/domain/0/backend/vbd/126/2049/feature-flush-cache. 16777216 sectors of 0 bytes ************************** vbd 2050 is hd1 ******************* BLKFRONT for device/vbd/2050 ********** - backend at /local/domain/0/backend/vbd/126/2050 Failed to read /local/domain/0/backend/vbd/126/2050/feature-barrier. Failed to read /local/domain/0/backend/vbd/126/2050/feature-flush-cache. 312705024 sectors of 0 bytes ************************** vbd 2051 is hd2 ******************* BLKFRONT for device/vbd/2051 ********** - backend at /local/domain/0/backend/vbd/126/2051 Failed to read /local/domain/0/backend/vbd/126/2051/feature-barrier. Failed to read /local/domain/0/backend/vbd/126/2051/feature-flush-cache. 1835008 sectors of 0 bytes ************************** [H[J Booting 'Ubuntu quantal (development branch), memtest86+' root (hd0) - Filesystem type is ext2fs, using whole disk + Filesystem type is ext2fs, using whole disk kernel /boot/memtest86+.bin xc_dom_probe_bzimage_kernel: kernel is not a bzImage ERROR Invalid kernel: xc_dom_find_loader: no loader found xc_dom_core.c:536: panic: xc_dom_find_loader: no loader found xc_dom_parse_image returned -1 Error 9: Unknown boot failure Press any key to continue...
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