s390x: Add builder config for RHCOS

Add the builder config for the s390x RHCOS builder.

Signed-off-by: Jan Schintag <[email protected]>

multi-arch-builders/coreos-s390x-rhcos-builder.bu

@@ -0,0 +1,32 @@
+# This butane config will do the following:
+#
+# - Merge in the builder-common.ign Ignition file
+# - Allow the builder user to log in with the associated ssh key
+# - Set a hostname
+#
+variant: fcos
+version: 1.4.0
+ignition:
+  config:
+    merge:
+      - source: http://foo/bar/builder-common.ign
+passwd:
+  users:
+    - name: builder
+      ssh_authorized_keys:
+        - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIBYuN4Crt4kwszp25BPpNGc8xPiVyXwXAGILQmBOOvCq builder@fcos-pipeline-s390x
+        - ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIEA9fEPuFwffqoqOFa9R0mIbUCaeHB03ql/QcTQ5Bqlx builder@rhcos-pipeline-s390x
+    - name: core
+      ssh_authorized_keys:
+        - ssh-rsa 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 [email protected]
+kernel_arguments:
+  should_exist:
+    # enables Secure Execution Host
+    - prot_virt=1
+storage:
+  files:
+    - path: /etc/hostname
+      mode: 0644
+      overwrite: true
+      contents:
+        inline: rdu-z15-l21