I believe you're mistaken. GDPR allows you to record IP addresses for normal operation of a site, which specifically includes logging. No banner is required.
GDPR is not "vague" about this; perhaps you haven't read it (as laws go, it's pretty easy to read).
@adammartinetti : maybe you could consider developing a new product where you display a GDPR consent banner once, and then these settings apply to all Cloudflare-proxied websites (by passing this consent information as an additional header to the proxied site)
Sounds inferior to the "no cookies no banner" solution.
The GDPR does not mandate gratuitous and pointless personalised spying, which is the only case that requires consent. Normal operations (say a shop collecting payment details and shipping address to fulfil an order) do not require a consent banner.
