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Michael Brown
d146b28b50
The CopyImage API call does work, but is unacceptably slow due to rate
limiting. Importing a full set of images to all regions can take
several hours (and is likely to fail at some point due to transient
errors in making API calls).
Resort to a mixture of strategies to get images imported to all
regions:
- For regions with working OSS that are not blocked by Chinese state
censorship laws, upload the image files to an OSS bucket and then
import the images.
- For regions with working OSS that are blocked by Chinese state
censorship laws but that have working FC, use a temporary FC
function to copy the image files from the uncensored OSS buckets
and then import the images. Attempt downloads from a variety of
uncensored buckets, since cross-region OSS traffic tends to
experience a failure rate of around 10% of requests.
- For regions that have working OSS but are blocked by Chinese state
censorship laws and do not have working FC, or for regions that
don't even have working OSS, resort to using CopyImage to copy the
previously imported images from another region. Spread the
imports across as many source regions as possible to minimise the
effect of the CopyImage rate limiting.
Signed-off-by: Michael Brown <mcb30@ipxe.org>