Add volume to Kub master

Add Cinder volume to the master and configure Docker DeviceMapper to use it

Change-Id: I87a69175bae941d4e3bea95fce71fe3974b7cdc5
Related-Bug: #1500062

magnum/templates/kubernetes/fragments/configure-docker-storage.sh

@@ -26,3 +26,5 @@ vgcreate docker ${device_path}
 cat > /etc/sysconfig/docker-storage-setup << EOF
 VG=docker
 EOF
+
+sed -i '/^DOCKER_STORAGE_OPTIONS=/ s/=.*/=--storage-driver devicemapper --storage-opt dm.fs=xfs --storage-opt dm.thinpooldev=\/dev\/mapper\/docker-docker--pool --storage-opt dm.use_deferred_removal=true/' /etc/sysconfig/docker-storage

magnum/templates/kubernetes/fragments/configure-kubernetes-minion.sh

@@ -42,6 +42,4 @@ cat >> /etc/environment <<EOF
 KUBERNETES_MASTER=$KUBE_MASTER_URI
 EOF
 
-sed -i '/^DOCKER_STORAGE_OPTIONS=/ s/=.*/=--storage-driver devicemapper --storage-opt dm.fs=xfs --storage-opt dm.thinpooldev=\/dev\/mapper\/docker-docker--pool --storage-opt dm.use_deferred_removal=true/' /etc/sysconfig/docker-storage
-
 hostname `hostname | sed 's/.novalocal//'`

magnum/templates/kubernetes/fragments/write-heat-params-master.yaml

@@ -9,6 +9,7 @@ write_files:
       KUBE_API_PRIVATE_ADDRESS="$KUBE_API_PRIVATE_ADDRESS"
       KUBE_API_PORT="$KUBE_API_PORT"
       KUBE_ALLOW_PRIV="$KUBE_ALLOW_PRIV"
+      DOCKER_VOLUME="$DOCKER_VOLUME"
       NETWORK_DRIVER="$NETWORK_DRIVER"
       FLANNEL_NETWORK_CIDR="$FLANNEL_NETWORK_CIDR"
       FLANNEL_NETWORK_SUBNETLEN="$FLANNEL_NETWORK_SUBNETLEN"

magnum/templates/kubernetes/kubecluster.yaml

@@ -400,6 +400,7 @@ resources:
           master_flavor: {get_param: master_flavor}
           external_network: {get_param: external_network}
           kube_allow_priv: {get_param: kube_allow_priv}
+          docker_volume_size: {get_param: docker_volume_size}
           wait_condition_timeout: {get_param: wait_condition_timeout}
           network_driver: {get_param: network_driver}
           flannel_network_cidr: {get_param: flannel_network_cidr}

magnum/templates/kubernetes/kubemaster.yaml

@@ -39,6 +39,13 @@ parameters:
     constraints:
       - allowed_values: ["true", "false"]
 
+  docker_volume_size:
+    type: number
+    description: >
+      size of a cinder volume to allocate to docker for container/image
+      storage
+    default: 25
+
   flannel_network_cidr:
     type: string
     description: network range for flannel overlay network
@@ -178,6 +185,7 @@ resources:
             "$KUBE_API_PRIVATE_ADDRESS": {get_param: api_private_address}
             "$KUBE_API_PORT": {get_param: kubernetes_port}
             "$KUBE_ALLOW_PRIV": {get_param: kube_allow_priv}
+            "$DOCKER_VOLUME": {get_resource: docker_volume}
             "$NETWORK_DRIVER": {get_param: network_driver}
             "$FLANNEL_NETWORK_CIDR": {get_param: flannel_network_cidr}
             "$FLANNEL_NETWORK_SUBNETLEN": {get_param: flannel_network_subnetlen}
@@ -204,6 +212,12 @@ resources:
       group: ungrouped
       config: {get_file: fragments/make-cert.sh}
 
+  configure_docker_storage:
+    type: OS::Heat::SoftwareConfig
+    properties:
+      group: ungrouped
+      config: {get_file: fragments/configure-docker-storage.sh}
+
   configure_etcd:
     type: OS::Heat::SoftwareConfig
     properties:
@@ -316,6 +330,7 @@ resources:
         - config: {get_resource: kube_user}
         - config: {get_resource: write_kube_os_config}
         - config: {get_resource: make_cert}
+        - config: {get_resource: configure_docker_storage}
         - config: {get_resource: configure_kubernetes}
         - config: {get_resource: add_proxy}
         - config: {get_resource: enable_services}
@@ -376,6 +391,24 @@ resources:
       address: {get_attr: [kube_master_eth0, fixed_ips, 0, ip_address]}
       protocol_port: 2379
 
+  ######################################################################
+  #
+  # docker storage.  This allocates a cinder volume and attaches it
+  # to the minion.
+  #
+
+  docker_volume:
+    type: OS::Cinder::Volume
+    properties:
+      size: {get_param: docker_volume_size}
+
+  docker_volume_attach:
+    type: OS::Cinder::VolumeAttachment
+    properties:
+      instance_uuid: {get_resource: kube_master}
+      volume_id: {get_resource: docker_volume}
+      mountpoint: /dev/vdb
+
 outputs:
 
   kube_master_ip: