We have a requirement to log all the errors/warnings on to Azure Blog Storage in JSON format (with specific structure) including the sitecore generated ones.
This will enable us to use any third party log analyzer such as sumo logic.
I had a look at this Sitecore Logging (Log4Net) Log to Database as Well as Text Files which is specific to SQL Database.
Would be good if you could share the solutions that's been implemented in production as there were performance issues with storing logs on to blog storage a while ago (2 years).