AWS S3 Plugin 
This plugin queries files on AWS S3 using S3 Select API
Installation
To install, download zip file from release page (for stable version) or download repository as zip file (for installing from git master)
grafana-cli --pluginUrl <path_to_zip_file> plugins install tvarit-s3-datasource
The plugin is not signed. To enable this plugin, change the following
[plugins]
...
# Enter a comma-separated list of plugin identifiers to identify plugins that are allowed to be loaded even if they lack a valid signature.
allow_loading_unsigned_plugins =
to
[plugins]
...
# Enter a comma-separated list of plugin identifiers to identify plugins that are allowed to be loaded even if they lack a valid signature.
allow_loading_unsigned_plugins = tvarit-s3-datasource
File Upload
To allow file upload from inbuilt file browser, add the following CORS policy in the bucket permissions (replace <<>> with the url in your browser)
<?xml version="1.0" encoding="UTF-8"?>
<CORSConfiguration xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
<CORSRule>
<AllowedOrigin><<<URL>>></AllowedOrigin>
<AllowedMethod>PUT</AllowedMethod>
<AllowedMethod>POST</AllowedMethod>
<AllowedMethod>DELETE</AllowedMethod>
<ExposeHeader>ETag</ExposeHeader>
<AllowedHeader>*</AllowedHeader>
</CORSRule>
<CORSRule>
<AllowedOrigin>*</AllowedOrigin>
<AllowedMethod>GET</AllowedMethod>
</CORSRule>
</CORSConfiguration>
Reference Links
S3 Select API Reference: https://docs.aws.amazon.com/AmazonS3/latest/API/API_SelectObjectContent.html
Query Reference: https://docs.aws.amazon.com/AmazonS3/latest/dev/s3-glacier-select-sql-reference.html