diff --git a/metal/group_vars/all.yml b/metal/group_vars/all.yml
index b5a71cb8..e3b44678 100644
--- a/metal/group_vars/all.yml
+++ b/metal/group_vars/all.yml
@@ -1,3 +1,5 @@
+ansible_ssh_private_key_file: '~/.ssh/id_rsa'
+
 iso_url: "https://mirrors.nhanhoa.com/centos/8.3.2011/isos/x86_64/CentOS-8.3.2011-x86_64-dvd1.iso"
 iso_checksum: "sha256:aaf9d4b3071c16dbbda01dfe06085e5d0fdac76df323e3bbe87cce4318052247"