diff --git a/_config b/_config
new file mode 100644
index 0000000..03dc7f5
--- /dev/null
+++ b/_config
@@ -0,0 +1,40 @@
+Prefer: -libqpid-proton10 -python311-urllib3_1
+
+Macros:
+%__python3 /usr/bin/python3.11
+%img_repo %(echo registry.opensuse.org:%{_project}:images | tr ":" "/" | tr '[:upper:]' '[:lower:]')
+%chart_repo oci://%(echo registry.opensuse.org:%{_project}:charts | tr ":" "/" | tr '[:upper:]' '[:lower:]')
+:Macros
+
+%if "%_repository" == "images"
+Prefer: container:sles15-image
+Type: docker
+Repotype: none
+Patterntype: none
+BuildEngine: podman
+Prefer: sles-release
+BuildFlags: dockerarg:SLE_VERSION=15.6
+
+# Publish multi-arch container images only once all archs have been built
+PublishFlags: archsync
+%endif
+%if "%_repository" == "charts"
+Type: helm
+Repotype: helm
+Patterntype: none
+Required: perl-YAML-LibYAML
+%endif
+%if "%_repository" == "standard"
+# for build openstack-ironic-image
+BuildFlags: allowrootforbuild
+%endif
+
+# Enable reproducible builds
+# https://en.opensuse.org/openSUSE:Reproducible_Builds\#With_OBS
+Macros:
+%source_date_epoch_from_changelog Y
+%clamp_mtime_to_source_date_epoch Y
+%use_source_date_epoch_as_buildtime Y
+%_buildhost reproducible
+:Macros
+