Merge branch '18941-arv-prefetch' refs #18941

[arvados.git] / doc / api / keep-s3.html.textile.liquid

diff --git a/doc/api/keep-s3.html.textile.liquid b/doc/api/keep-s3.html.textile.liquid
index d5ad1dc60269cab69b45cd9f7b756904ce644fac..bee91516bc12fc61e87a51b603361372ad64e358 100644 (file)
--- a/doc/api/keep-s3.html.textile.liquid
+++ b/doc/api/keep-s3.html.textile.liquid
@@ -74,5 +74,16 @@ h3. Authorization mechanisms
 
 Keep-web accepts AWS Signature Version 4 (AWS4-HMAC-SHA256) as well as the older V2 AWS signature.
 
-* If your client uses V4 signatures exclusively: use the Arvados token's UUID part as AccessKey, and its secret part as SecretKey.  This is preferred.
-* If your client uses V2 signatures, or a combination of V2 and V4, or the Arvados token UUID is unknown: use the secret part of the Arvados token for both AccessKey and SecretKey.
+If your client uses V4 signatures exclusively _and_ your Arvados token was issued by the same cluster you are connecting to, you can use the Arvados token's UUID part as your S3 Access Key, and its secret part as your S3 Secret Key. This is preferred, where applicable.
+
+Example using cluster @zzzzz@:
+* Arvados token: @v2/zzzzz-gj3su-yyyyyyyyyyyyyyy/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@
+* Access Key: @zzzzz-gj3su-yyyyyyyyyyyyyyy@
+* Secret Key: @xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@
+
+In all other cases, replace every @/@ character in your Arvados token with @_@, and use the resulting string as both Access Key and Secret Key.
+
+Example using a cluster other than @zzzzz@ _or_ an S3 client that uses V2 signatures:
+* Arvados token: @v2/zzzzz-gj3su-yyyyyyyyyyyyyyy/xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@
+* Access Key: @v2_zzzzz-gj3su-yyyyyyyyyyyyyyy_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@
+* Secret Key: @v2_zzzzz-gj3su-yyyyyyyyyyyyyyy_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx@