UPSTREAM: <carry>: RPM: Split apiserver, scheduler, k-c-m, kubelet in…

…to subpackages

This change should allow us to install a much smaller set of binaries
into RHCOS while preserving functional compatibility with with anyone
who installs `openshift-hyperkube` today as it requires all sub packages.
Those wishing to have just the kubelet can begin installing
`openshift-hyperkube-kubelet`

-rwxr-xr-x. 2 root root 129M Jan  1  1970 /usr/bin/kube-apiserver
-rwxr-xr-x. 2 root root 114M Jan  1  1970 /usr/bin/kube-controller-manager
-rwxr-xr-x. 2 root root  54M Jan  1  1970 /usr/bin/kube-scheduler
-rwxr-xr-x. 2 root root 105M Jan  1  1970 /usr/bin/kubelet
-rwxr-xr-x. 2 root root 3.5K Jan  1  1970 /usr/bin/kubensenter

Should save about 297M or 74% in most environments where the kubelet is
all that's desired.

It's not clear to me why these were ever in the RPM since OCP 4.x but this
packaging should remain compatible as openshift-hyperkube depends on
 - openshift-kubelet
 - openshift-kube-apiserver
 - openshift-kube-scheduler
 - openshift-kube-controller-manager

openshift.spec

@@ -69,17 +69,49 @@ Kubernetes allowing you to safely host many different applications and workloads
 on a unified cluster.
 
 %package hyperkube
-Summary:        OpenShift Kubernetes server commands
-Requires:       util-linux
-Requires:       socat
-Requires:       iptables
+Summary:        OpenShift Kubernetes server commands, via deps
+Requires:       kube-scheduler = %{version}
+Requires:       kube-kubelet = %{version}
+Requires:       kube-controller-manager = %{version}
+Requires:       kube-apiserver = %{version}
 Provides:       hyperkube = %{version}
 Obsoletes:      atomic-openshift-hyperkube <= %{version}
 Obsoletes:      atomic-openshift-node <= %{version}
 
+%package kube-scheduler
+Summary:        OpenShift Kubernetes Scheduler
+Provides:       kube-scheduler = %{version}
+
+%package kubelet
+Summary:        OpenShift Kubernetes Kubelet
+Requires:       util-linux
+Requires:       socat
+Requires:       iptables
+Provides:       kube-kubelet = %{version}
+
+%package kube-controller-manager
+Summary:        OpenShift Kubernetes Controller Manager
+Provides:       kube-controller-manager = %{version}
+
+%package kube-apiserver
+Summary:        OpenShift Kubernetes API Server
+Provides:       kube-apiserver = %{version}
+
 %description hyperkube
 %{summary}
 
+%description kube-scheduler
+%{summary}
+
+%description kubelet
+%{summary}
+
+%description kube-controller-manager
+%{summary}
+
+%description kube-apiserver
+%{summary}
+
 %prep
 %if 0%{do_prep}
 %setup -q
@@ -120,18 +152,29 @@ install -p -m 755 openshift-hack/images/hyperkube/hyperkube %{buildroot}%{_bindi
 install -p -m 755 openshift-hack/images/hyperkube/kubensenter %{buildroot}%{_bindir}/kubensenter
 install -p -m 755 openshift-hack/sysctls/50-kubelet.conf %{buildroot}%{_sysctldir}/50-kubelet.conf
 
-%post
+%post kubelet
 %sysctl_apply 50-kubelet.conf
 
 %files hyperkube
 %license LICENSE
 %{_bindir}/hyperkube
-%{_bindir}/kube-apiserver
-%{_bindir}/kube-controller-manager
-%{_bindir}/kube-scheduler
+%defattr(-,root,root,0700)
+
+%files kubelet
 %{_bindir}/kubelet
 %{_bindir}/kubensenter
 %{_sysctldir}/50-kubelet.conf
 %defattr(-,root,root,0700)
 
+%files kube-scheduler
+%{_bindir}/kube-scheduler
+
+%files kube-controller-manager
+%{_bindir}/kube-controller-manager
+
+%files kube-apiserver
+%{_bindir}/kube-apiserver
+
+
+
 %changelog