etcd: Manually create the data dir

With etcd 3.4.10, this data dir should have permissions 0700. If
anything else is found then the daemon fails.

Signed-off-by: Suraj Deshmukh <suraj@kinvolk.io>

assets/lokomotive-kubernetes/aws/flatcar-linux/kubernetes/cl/controller.yaml.tmpl

@@ -161,6 +161,12 @@ storage:
             --net=host \
             --dns=host \
             --exec=/bootkube -- start --asset-dir=/assets "$@"
+    - path: /etc/tmpfiles.d/etcd-wrapper.conf
+      filesystem: root
+      mode: 0644
+      contents:
+        inline: |
+          d    /var/lib/etcd 0700 etcd etcd - -
     - path: /opt/etcd-rejoin
       filesystem: root
       mode: 0555

assets/lokomotive-kubernetes/bare-metal/flatcar-linux/kubernetes/cl/controller.yaml.tmpl

@@ -189,6 +189,12 @@ storage:
           kind: KubeletConfiguration
           cgroupDriver: "$${docker_cgroup_driver}"
           EOF
+    - path: /etc/tmpfiles.d/etcd-wrapper.conf
+      filesystem: root
+      mode: 0644
+      contents:
+        inline: |
+          d    /var/lib/etcd 0700 etcd etcd - -
 passwd:
   users:
     - name: core

assets/lokomotive-kubernetes/packet/flatcar-linux/kubernetes/cl/controller.yaml.tmpl

@@ -211,6 +211,12 @@ storage:
             --net=host \
             --dns=host \
             --exec=/bootkube -- start --asset-dir=/assets "$@"
+    - path: /etc/tmpfiles.d/etcd-wrapper.conf
+      filesystem: root
+      mode: 0644
+      contents:
+        inline: |
+          d    /var/lib/etcd 0700 etcd etcd - -
     - path: /opt/etcd-rejoin
       filesystem: root
       mode: 0555