...

Once you have your Rancher and Kubernetes environment running on your Openstack environment, you will need to add raw volumes to each Kubernetes node from Openstack console.

<<TODO: screenshots or video on adding storage>>

...

In this document, we assume that the volumes were mounted on /dev/vdb.

(Openstack will tell you which device path your volume is mounted when you attach your volume to your instance).

Here's a quick video on how to add volumes to Openstack:

Adding a volume to Openstack - Demo

GlusterFS setup

Once you have your infrastructure running and your RAW volumes mounted to your kubernetes nodes, deploy your Heketi / GlusterFS infrastructure. You can use the scripts included in OOM to automate this in your lab. (Not recommended for production install).

Demo Video

You can watch the execution of the script as per below instructions here:
GlusterFS Script Demo Video

Downloading the scripts 

There are 2 scripts contained within OOM resources: deploy_glusterfs.bash, which will set up your initial GlusterFS infrastructure. This will also deploy a Heketi pod, which is the RestAPI interface to manage your GlusterFS cluster.

There is also a cleanup script that you can use to cleanup your GlusterFS infrastructure when you are done or would like to re-deploy a clean GlusterFS infrastructure.

Grab the OOM artifacts from Gerrit (we did this on the Rancher master node in our deployment).

Currently the scripts are available by cherry-picking the following changeset: https://gerrit.onap.org/r/#/c/67049/

e.g. Run this after downloading Cassandra OOM: 
git fetch https://gerrit.onap.org/r/oom refs/changes/49/67049/1 && git cherry-pick FETCH_HEAD

git clone http://gerrit.onap.org/r/oom
#git fetch https://gerrit.onap.org/r/oom refs/changes/49/67049/1 && git cherry-pick FETCH_HEAD
cd oom/kubernetes
cd contrib/resources/scripts
ls -l

 total 16
-rw-r--r-- 1 root root 1612 Sep 11 16:18 cleanup_gluster.bash
-rw-r--r-- 1 root root 9956 Sep 11 18:51 deploy_glusterfs.bash

bash deploy_glusterfs.bash

deploy_glusterfs.bash: usage: deploy_gluster.bash <dev path> namespace
e.g. deploy_glusterfs.bash /dev/vdb onap
This script deploys a GlusterFS kubernetes on OpenStack to be used as Persistent Volumes

bash deploy_glusterfs.bash /dev/vdb onap

The script will prompt you to hit "Enter" every once in a while to let you confirm there are no errors. There is minimal error checking in this script, so pay attention, especially when you are re-running the script after previously deploying GlusterFS.

The script will start off to direct you to run some commands manually on the other Kubernetes worker nodes (Openstack VMs):

iptables -N HEKETI
iptables -A HEKETI -p tcp -m state --state NEW -m tcp --dport 24007 -j ACCEPT
iptables -A HEKETI -p tcp -m state --state NEW -m tcp --dport 24008 -j ACCEPT
iptables -A HEKETI -p tcp -m state --state NEW -m tcp --dport 2222 -j ACCEPT
iptables -A HEKETI -p tcp -m state --state NEW -m multiport --dports 49152:49251 -j ACCEPT
service iptables save

modprobe dm_snapshot
modprobe dm_mirror
modprobe dm_thin_pool

lsmod |egrep 'dm_snapshot|dm_mirror|dm_thin_pool' 

Validation

Once the script is finished, check to make sure you have a valid StorageClass defined, and GlusterFS/Heketi Pods running on each Kubernetes node:

(Pod names and IP addresses will vary)

kubectl get pods --namespace onap
kubectl describe sc --namespace onap
kubectl get service --namespace onap

e.g

NAME READY STATUS RESTARTS AGE
glusterfs-cxqc2 1/1 Running 0 4d
glusterfs-djq4x 1/1 Running 0 4d
glusterfs-t7cj5 1/1 Running 0 4d
glusterfs-z4vk6 1/1 Running 0 4d
heketi-5876bd4875-hzw2d 1/1 Running 0 4d

Name: glusterfs-sc
IsDefaultClass: No
Annotations: <none>
Provisioner: kubernetes.io/glusterfs
Parameters: resturl=http://10.43.185.167:8080,restuser=,restuserkey=
Events: <none>

NAME                                                TYPE        CLUSTER-IP      EXTERNAL-IP   PORT(S)
heketi ClusterIP 10.43.185.167 <none> 8080/TCP 4d
heketi-storage-endpoints ClusterIP 10.43.227.203 <none> 1/TCP 4d

Deploy ONAP with OOM

You can choose any of the documented methods on this site or on onap.readthedocs.io, but here is a brief example of how you can deploy ONAP with GlusterFS.

Note: any persistent storage technology can be used in the example going forward, just make sure you have a storageClass already defined.

Edit / validate your values.yaml file

There is a custom values file in ~oom/kubernetes/onap/resources/environments called values_global_gluster.yaml that can be used, or you can edit the master values.yaml file at ~oom/kubernetes/onap/values.yaml.

We will assume that you are doing the former.

Ensure that you have your storageClass defined in the global section of your values file:

vim ~oom/kubernetes/onap/resources/environments/values_global_gluster.yaml

Ensure you have your storage class defined within global:persistence section:

global:
# Change to an unused port prefix range to prevent port conflicts


...snip...


# default mount path root directory referenced
# by persistent volumes and log files
persistence:
storageClass: glusterfs-sc
mountPath: /dockerdata-nfs

Enable any components you want to deploy. In the values_global_gluster.yaml file, they are disabled by default. E.g. to enable APPC:

aaf:
  enabled: false
  aaf-sms:
aai:
  enabled: false
appc:
  enabled: true
  config:
    openStackType: OpenStackProvider
    openStackName: OpenStack
    openStackKeyStoneUrl: http://localhost:8181/apidoc/explorer/index.html
    openStackServiceTenantName: default
    openStackDomain: default
    openStackUserName: admin
    openStackEncryptedPassword: admin
clamp:
  enabled: false
cli:
  enabled: false

Once you have properly edited your values file, deploy ONAP:

cd ~/oom/kubernetes
helm upgrade -i dev local/onap --namespace onap -f onap/resources/environments/values_global_gluster.yaml

Wait until components are up, and validate that your persistent volumes are using your persistent storageClass:

kubectl get pvc --namespace onap 

You should see "glusterfs-sc" (or whatever storageClass name you chose) under the STORAGECLASS column:

NAME                                 STATUS    VOLUME                                     CAPACITY   ACCESS MODES   STORAGECLASS   AGE
dev-appc-data-dev-appc-0 Bound pvc-472a9868-b5e7-11e8-ab3b-028b3e95b074 2Gi RWO glusterfs-sc 2h
dev-appc-db-mysql-dev-appc-db-0 Bound pvc-4724df2b-b5e7-11e8-ab3b-028b3e95b074 2Gi RWO glusterfs-sc 2h

Ensure your pods are running and bound to your persistent volume:

e.g.

kubectl describe pod dev-appc-db-0 --namespace onap

Make sure the pod is "Status: Running" and it is using the persistent volume that is associated with your storageClass:

 Name: dev-appc-db-0
Namespace: onap
Node: k8s-steve-1/10.0.0.29
Start Time: Tue, 11 Sep 2018 17:23:09 +0000
...snip... 
Status: Running
...snip...
Volumes:
dev-appc-db-mysql:
Type: PersistentVolumeClaim (a reference to a PersistentVolumeClaim in the same namespace)
ClaimName: dev-appc-db-mysql-dev-appc-db-0
ReadOnly: false
...snip....