Errors are being reported during this step:
df: /home/ubuntu/discourse/public/uploads: No such file or directory
There definitely is a directory there:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/xvda1 32888828 10808136 20639128 35% /
so I'm not sure what - if anything - can be done about that error.
jhead worker: `jhead` not found; please provide proper binary or disable this worker (--no-jhead argument or `:jhead => false` through options)
Do I need to install the jhead package?
svgo worker: `svgo` not found; please provide proper binary or disable this worker (--no-svgo argument or `:svgo => false` through options)
I'm not sure if there is an Ubuntu package for svgo, so that might need to be installed manually?
convert: unable to open image `/home/ubuntu/discourse/public/uploads/default/9/1234567890123456.png': No such file or directory @ error/blob.c/OpenBlob/2712.
This might be because jhead and svgo are missing, I guess.
Does it matter if autospec has problems? Presumably it is running a series of test?