fix: Persist /var/lib/cni between kubelet restarts (#64)

* fix: Persist /var/lib/cni between kubelet restarts

fix #60

Author: mumoshu

config/templates/cloud-config-controller

@@ -52,11 +52,14 @@ coreos:
         --mount volume=rkt,target=/usr/bin/rkt \
         --volume var-lib-rkt,kind=host,source=/var/lib/rkt \
         --mount volume=var-lib-rkt,target=/var/lib/rkt \
+        --volume var-lib-cni,kind=host,source=/var/lib/cni \
+        --mount volume=var-lib-cni,target=/var/lib/cni \
         --volume stage,kind=host,source=/tmp \
         --mount volume=stage,target=/tmp \
         --volume var-log,kind=host,source=/var/log \
         --mount volume=var-log,target=/var/log"
         ExecStartPre=/usr/bin/systemctl is-active flanneld.service
+        ExecStartPre=/usr/bin/mkdir -p /var/lib/cni
         ExecStartPre=/usr/bin/mkdir -p /var/log/containers
         ExecStart=/usr/lib/coreos/kubelet-wrapper \
         --api-servers=http://localhost:8080 \

config/templates/cloud-config-worker

@@ -45,11 +45,14 @@ coreos:
         --mount volume=rkt,target=/usr/bin/rkt \
         --volume var-lib-rkt,kind=host,source=/var/lib/rkt \
         --mount volume=var-lib-rkt,target=/var/lib/rkt \
+        --volume var-lib-cni,kind=host,source=/var/lib/cni \
+        --mount volume=var-lib-cni,target=/var/lib/cni \
         --volume stage,kind=host,source=/tmp \
         --mount volume=stage,target=/tmp \
         --volume var-log,kind=host,source=/var/log \
         --mount volume=var-log,target=/var/log"
         ExecStartPre=/usr/bin/systemctl is-active flanneld.service
+        ExecStartPre=/usr/bin/mkdir -p /var/lib/cni
         ExecStartPre=/usr/bin/mkdir -p /var/log/containers
         ExecStart=/usr/lib/coreos/kubelet-wrapper \
         --api-servers={{.APIServerEndpoint}} \