check this exists before modifying it

Author: owenjones

etc/kayobe/kolla.yml

@@ -256,9 +256,9 @@ stackhpc_rocky_10_additional_repos:
   - url: "{{ stackhpc_repo_centos_stream_10_nfv_openvswitch_url }}"
     file: "CentOS-NFV-OpenvSwitch.repo"
     tag: "centos-nfv-openvswitch"
-  # - url: "{{ stackhpc_repo_centos_stream_10_openstack_epoxy_url }}"
-  #   file: "CentOS-OpenStack-epoxy.repo"
-  #   tag: "centos-openstack-epoxy"
+  - url: "{{ stackhpc_repo_centos_stream_10_openstack_epoxy_url }}"
+    file: "CentOS-OpenStack-epoxy.repo"
+    tag: "centos-openstack-epoxy"
   - url: "{{ stackhpc_repo_rocky_10_crb_url }}"
     file: "rocky.repo"
     tag: "crb"
@@ -398,7 +398,9 @@ kolla_build_blocks:
         # https://git.centos.org/rpms/rdo-openvswitch/blob/c9s-sig-cloud-openstack-epoxy/f/SPECS/rdo-openvswitch.spec#L10),
         # which would replace our NFV OVS and OVN 24.03 LTS with 24.09. Hence exclude RDO OVN/OVS.
         && \
-        sed -i '/^\[centos-openstack-epoxy\]/a excludepkgs=*rdo-ovn*,*rdo-openvswitch*' /etc/yum.repos.d/CentOS-OpenStack-epoxy.repo \
+        if [ -f /etc/yum.repos.d/CentOS-OpenStack-epoxy.repo ]; then \
+          sed -i '/^\[centos-openstack-epoxy\]/a excludepkgs=*rdo-ovn*,*rdo-openvswitch*' /etc/yum.repos.d/CentOS-OpenStack-epoxy.repo; \
+        fi \
     {% endif %}
   # With the UCA keyring installed we can now add all repos.
   base_ubuntu_package_sources_list: |