Package fixes for enabling br_netfilter & ip_forward with kubeadm (kubeadm#1062)

build/rpms/50-kubeadm.conf

+# The file is provided as part of the kubeadm package
+net.ipv4.ip_forward = 1

build/rpms/kubeadm.conf

+# Load br_netfilter module at boot
+br_netfilter

build/rpms/kubeadm.spec

@@ -21,8 +21,15 @@ install -m 755 -d %{buildroot}%{_sysconfdir}/sysconfig/
 install -p -m 755 -t %{buildroot}%{_bindir} {kubeadm}
 install -p -m 755 -t %{buildroot}%{_sysconfdir}/systemd/system/kubelet.service.d/ {10-kubeadm.conf}
 install -p -m 755 -T {kubelet.env} %{buildroot}%{_sysconfdir}/sysconfig/kubelet
+mkdir -p %{buildroot}%{_libexecdir}/modules-load.d
+mkdir -p %{buildroot}%{_sysctldir}
+install -p -m 0644 -t %{buildroot}%{_libexecdir}/modules-load.d/ {kubeadm.conf}
+install -p -m 0644 -t %{buildroot}%{_sysctldir} %{50-kubeadm.conf}
 
 %files
 %{_bindir}/kubeadm
 %{_sysconfdir}/systemd/system/kubelet.service.d/10-kubeadm.conf
 %{_sysconfdir}/sysconfig/kubelet
+%dir %{_libexecdir}/modules-load.d
+%{_libexecdir}/modules-load.d/kubeadm.conf
+%{_sysctldir}/50-kubeadm.conf