Merge pull request #61633 from briantopping/feature/61632

Automatic merge from submit-queue (batch tested with PRs 62694, 62569, 62646, 61633, 62433). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Patch for #61632, add `/etc/sysconfig/kublet` and supporting wiring. **What this PR does / why we need it**: These are just simple config structure changes to better meet expectations for RHEL users. Helps `KUBELET_EXTRA_ARGS` parameters more easily survive across version upgrades without requiring manual merge of the service file. **Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*: Fixes #61632 **Special notes for your reviewer**: It may be beneficial to give this treatment to other `systemd`-based systems, but I do not have the intellectual authority to do so. **Release note**: ```NONE ```

Merge pull request #61633 from briantopping/feature/61632
5ee45a26 · Kubernetes Submit Queue · GitHub · b758341a · eefe8cbf · 5ee45a26
Unverified Commit 5ee45a26 authored Apr 18, 2018 by Kubernetes Submit Queue Committed by GitHub Apr 18, 2018
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10-kubeadm.conf build/rpms/10-kubeadm.conf +1 -0

kubeadm.spec build/rpms/kubeadm.spec +1 -0

kubelet build/rpms/kubelet +1 -0

No files found.
--- a/build/rpms/10-kubeadm.conf
+++ b/build/rpms/10-kubeadm.conf
 [Service]
+EnvironmentFile=-/etc/sysconfig/kubelet
 Environment="KUBELET_KUBECONFIG_ARGS=--bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf"
 Environment="KUBELET_SYSTEM_PODS_ARGS=--pod-manifest-path=/etc/kubernetes/manifests --allow-privileged=true"
 Environment="KUBELET_NETWORK_ARGS=--network-plugin=cni --cni-conf-dir=/etc/cni/net.d --cni-bin-dir=/opt/cni/bin"

--- a/build/rpms/kubeadm.spec
+++ b/build/rpms/kubeadm.spec
@@ -18,6 +18,7 @@ install -m 755 -d %{buildroot}%{_sysconfdir}/systemd/system/
 install -m 755 -d %{buildroot}%{_sysconfdir}/systemd/system/kubelet.service.d/
 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 %{buildroot}%{_sysconfdir}/sysconfig/ kubelet

 %files
 %{_bindir}/kubeadm

--- a/build/rpms/kubelet
+++ b/build/rpms/kubelet
+KUBELET_EXTRA_ARGS=