Comment 2 for bug 942865

This seems to be a general problem with essex and an image that has a kernel/ramdisk associated with it, and making that image public.

To demonstrate, on a local devstack, I did:

$ cloud-publish-tarball files/cirros-0.3.0-x86_64-uec.tar.gz sm-bucket
Wed Feb 29 09:28:28 EST 2012: ====== extracting image ======
kernel : cirros-0.3.0-x86_64-vmlinuz
ramdisk: cirros-0.3.0-x86_64-initrd
image : cirros-0.3.0-x86_64-blank.img
Wed Feb 29 09:28:28 EST 2012: ====== bundle/upload kernel ======
Wed Feb 29 09:28:30 EST 2012: ====== bundle/upload ramdisk ======
Wed Feb 29 09:28:33 EST 2012: ====== bundle/upload image ======
Wed Feb 29 09:28:37 EST 2012: ====== done ======
emi="ami-0000000a"; eri="ari-00000009"; eki="aki-00000008";

$ euca-describe-images ami-0000000a
IMAGE ami-0000000a sm-bucket/cirros-0.3.0-x86_64-blank.img.manifest.xml available private x86_64 machine aki-00000008 ari-00000009 instance-store

$ euca-run-instances --key mykey --instance-type m1.tiny ami-0000000a

the instance ran fine. Then, try to make it public.

$ euca-modify-image-attribute --launch-permission --add all aki-00000008
IMAGE aki-00000008
$ euca-modify-image-attribute --launch-permission --add all ari-00000009
IMAGE ari-00000009
$ euca-modify-image-attribute --launch-permission --add all ami-0000000a
IMAGE ami-0000000a

making it public changes the ami and aki in describe-images output

$ euca-describe-images | grep sm-bucket
IMAGE aki-00000008 sm-bucket/cirros-0.3.0-x86_64-vmlinuz.manifest.xml available public x86_64 kernel instance-store
IMAGE ari-00000009 sm-bucket/cirros-0.3.0-x86_64-initrd.manifest.xml available public x86_64 ramdisk instance-store
IMAGE ami-0000000a sm-bucket/cirros-0.3.0-x86_64-blank.img.manifest.xml available public x86_64 machine aki-0000000b ari-0000000c instance-store

Try to run it again.
$ euca-run-instances --key mykey --instance-type m1.tiny ami-0000000a
ImageNotFound: Image 8 could not be found.

To reduce the scope a bit, try using already-public kernel/ramdisk:
$ cloud-publish-tarball files/cirros-0.3.0-x86_64-uec.tar.gz --kernel aki-00000008 --ramdisk ari-00000009 sm-bucket2
Wed Feb 29 10:54:41 EST 2012: ====== extracting image ======
kernel : aki-00000008
ramdisk: ari-00000009
image : cirros-0.3.0-x86_64-blank.img
Wed Feb 29 10:54:42 EST 2012: ====== bundle/upload image ======
Wed Feb 29 10:54:45 EST 2012: ====== done ======
emi="ami-0000000d"; eri="ari-00000009"; eki="aki-00000008";

$ euca-run-instances --key mykey --instance-type m1.tiny ami-0000000d

The new instance runs fine as private.

$ euca-modify-image-attribute --launch-permission --add all ami-0000000d
$ euca-describe-images ami-0000000d
IMAGE ami-0000000d sm-bucket2/cirros-0.3.0-x86_64-blank.img.manifest.xml available public x86_64 machine aki-0000000b ari-0000000c instance-store

Note, again, the aki and ari changed.
And now...
$ euca-run-instances --key mykey --instance-type m1.tiny ami-0000000d
ImageNotFound: Image 8 could not be found.