Add a line about the format of key for clusterctl config

Signed-off-by: Kotaro Inoue <inoue.kotaro@linecorp.com> Update docs/book/src/clusterctl/configuration.md Co-authored-by: killianmuldoon <47175296+killianmuldoon@users.noreply.github.com>
kubernetes-sigs · Oct 2, 2023 · a4ca183 · a4ca183
1 parent b685b09
commit a4ca183
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/docs/book/src/clusterctl/configuration.md b/docs/book/src/clusterctl/configuration.md
@@ -59,6 +59,9 @@ variables in the `clusterctl` config file:
 AWS_B64ENCODED_CREDENTIALS: XXXXXXXX
 ```
 
+The format of keys should always be `UPPERCASE_WITH_UNDERSCORE` for both OS environment variables and in the  `clusterctl`
+config file.
+
 In case a variable is defined both in the config file and as an OS environment variable,
 the environment variable takes precedence.