Disable Cache

[folson-csi]

I have a project that is retrieving images from my S3 bucket where the images update about every 10 minutes. With the current implementation of this docker image, I am not able to find any way to disable the caching. Currently I am seeing the images only being update every hour or so. Is there a way to disable the cache completely? I've tried setting the PROXY_CACHE_VALID_OK to 1m. It would be useful if I could disable caching as a whole via an ENV variable.

[gimse]

I also need this function. The cache works bad with using byte range.

[4141done]

Thank you for bringing this up and I apologize for the delay in my response. I just tested and it appears that you can set PROXY_CACHE_VALID_OK to 0 and you will effectively turn off the cache although it's not well documented in the docs.

I tested by setting this and uncommenting add_header X-Cache-Status $upstream_cache_status; in my build of the s3 gateway image. It'll show X-Cache-Status: MISS for all previously uncached requests. For previously cached requests you'll have to wait for the TTL to expire. Please let me know if this fits your need or if I am misunderstanding.

I think also we can consider other solutions to this when looking at #188 but I would really like to avoid adding more env var settings unnecessarily. If setting that value to 0 works for you then we can improve the documentation.