[5.334548] Waiting 300 sec before mounting root device...
This is not a kernel issue, but an emergent bug from the combination of
us specifying rootdelay=300 in azure images, and the fact that the
minimal image boots initramfsless. The kernel interprets 'rootdelay'
differently than Ubuntu
Myself and @kamalmostafa spoke and the issue is not obvious especially
as linux-azure is installed in the base image too which does not exhibit
the issue.
Although not obvious @kamalmostafa did suspect the issue to lie
somewhere with random number generation and a related package/kernel
patch.
@kamalmostafa @mhcerri
I noticed that linux-azure 4.18.0.1003.3 was uploaded to cosmic-proposed
so I built a new test image.
For convenience I have imported your SSH keys to 'ssh
ubuntu@51.140.217.58'.
All logs and VHD etc. have been uploaded to https://private-
** Tags added: id-5baa9659e21d6e6664eaed37
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https://bugs.launchpad.net/bugs/1795017
Title:
linux-azure on cosmic minimal image boot speed
Status in linux-azure
On request on IRC I have tried a new image with linux-azure
4.18.0.1002.2 from cosmic-proposed.
This too exhibited the slow boot
5min 19.070s (kernel) + 41.724s (userspace) = 6min 794ms
Full logs @ https://private-fileshare.canonical.com/~philroche/azure-
cosmic-20181001/
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** Attachment added: "cosmic minimal image with linux-azure 4.18.0.1002.2 (from
cosmic-proposed) boot log"
https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1795017/+attachment/5195337/+files/chohv4Va7Ahx7-vm-imagedebug-boot.log
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