update openstack documentation

docs/tutorial/openstack.md

@@ -3,13 +3,16 @@
 **WARNING**: OpenStack support on kops is currently **alpha** meaning it is in the early stages of development and subject to change, please use with caution.
 
 ## Source your openstack RC
-The Cloud Config used by the kubernetes API server and kubelet will be constructed from environment variables in the openstack RC file.
+The Cloud Config used by the kubernetes API server and kubelet will be constructed from environment variables in the openstack RC file. The openrc.sh file is usually located under `API access`.
+
 ```bash
 source openstack.rc
 ```
+
 **--OR--**
 ## Create config file
 The config file contains the OpenStack credentials required to create a cluster. The config file has the following format:
+
 ```ini
 [Default]
 identity=<OS_AUTH_URL>
@@ -38,6 +41,7 @@ region=<OS_REGION_NAME>
 ## Environment Variables
 
 It is important to set the following environment variables:
+
 ```bash
 export OPENSTACK_CREDENTIAL_FILE=<config-file> # where <config-file> is the path of the config file
 export KOPS_STATE_STORE=swift://<bucket-name> # where <bucket-name> is the name of the Swift container to use for kops state
@@ -46,6 +50,8 @@ export KOPS_STATE_STORE=swift://<bucket-name> # where <bucket-name> is the name
 export KOPS_FEATURE_FLAGS="AlphaAllowOpenStack"
 ```
 
+If your OpenStack does not have Swift you can use any other VFS store, such as S3.
+
 ## Creating a Cluster
 
 ```bash
@@ -56,31 +62,28 @@ openstack volume type list
 kops create cluster \
   --cloud openstack \
   --name my-cluster.k8s.local \
-  --state swift://my-cluster \
+  --state ${KOPS_STATE_STORE} \
   --zones nova \
   --network-cidr 10.0.0.0/24 \
-  --image CentOS \
+  --image <imagename> \
   --master-count=3 \
   --node-count=1 \
-  --node-size 2vCPUx8GB \
-  --master-size 2vCPUx8GB \
-  --etcd-storage-type CBS \
-   --api-loadbalancer-type public \
+  --node-size <flavorname> \
+  --master-size <flavorname> \
+  --etcd-storage-type <volumetype> \
+  --api-loadbalancer-type public \
   --topology private \
   --bastion \
   --ssh-public-key ~/.ssh/id_rsa.pub \
-  --networking weave
+  --networking weave \
+  --os-ext-net <externalnetworkname>
 
 # to update a cluster
-kops update cluster my-cluster.k8s.local --state swift://my-cluster --yes
+kops update cluster my-cluster.k8s.local --state ${KOPS_STATE_STORE} --yes
 
 # to delete a cluster
-# Not implemented yet...
-# kops delete cluster my-cluster.k8s.local --yes
+kops delete cluster my-cluster.k8s.local --yes
 ```
 
-## Features Still in Development
-
-kops for OpenStack currently does not support these features:
-* cluster delete
-
+#### Optional flags
+* `--os-kubelet-ignore-az=true` Nova and Cinder have different availability zones, more information [Kubernetes docs](https://kubernetes.io/docs/concepts/cluster-administration/cloud-providers/#block-storage)