osd: add namespace in vault client

If the KMS connection details for Vault have a VAULT_NAMESPACE we must
use it when building the vault client to auto-detect the KV internal
version.

Signed-off-by: Sébastien Han <seb@redhat.com>

pkg/daemon/ceph/osd/kms/vault_api.go

@@ -84,6 +84,11 @@ func newVaultClient(clusterdContext *clusterd.Context, namespace string, secretC
 		return nil, err
 	}
 
+	// Set the namespace if the config has a namespace
+	if backendPath := GetParam(secretConfig, api.EnvVaultNamespace); backendPath != "" {
+		client.SetNamespace(secretConfig[api.EnvVaultNamespace])
+	}
+
 	// Configure the authentication method, either Token or Kubernetes.
 	// Both return a token
 	token, _, err := utils.Authenticate(client, c)