pv creation for openshift

pv creation

on the bastion host :

* Create 100 directory exports as persistent volumes:
mkdir -p /var/export/pvs/pv{1..100}
chown -R nfsnobody:nfsnobody /var/export/pvs/
chmod -R 700 /var/export/pvs/


* add a line for each export directory to  /et/exports
for volume in pv{1..100} ; do echo Creating export for volume $volume; echo "/var/export/pvs/${volume} 192.168.0.0/24(rw,sync,all_squash)" >> /etc/exports; done;

* enable and start nfs services:
systemctl enable rpcbind nfs-server
systemctl start rpcbind nfs-server nfs-lock nfs-idmap
systemctl stop firewalld
systemctl disable firewalld

* Run the following to allow containers to write to NFS-mounted directories on all the nodes where the pod could land (that is, all of them):
for node in hdbsalx00004 hdbsalx00005 hdbsalx00006 hdbsalx00007 hdbsalx00008 hdbsalx00009;
do echo "Setting SElinux Policy on $node " ;   ssh $node " setsebool -P virt_use_nfs=true;"
done



* To ensure NFS access, connect to a node a and verify that you can mount a volume from the bastion 
ssh hdbsalx00005
mkdir /tmp/test
mount -v bastion:/var/export/pvs/pv98 /tmp/test
umount /tmp/test

Create Definition Files for Volumes

* create directory to host pv and pvc definition
mkdir /root/pvs

* create 25 instances of PV (pv1 to pv25) with a size of 5GB

$ cat pvtype1.sh
export volsize="5Gi";
export SERVERNAME="192.168.0.254"
export NFS_PATH="/var/export/pvs"
export LOCAL_PATH="/root/pvs"
for volume in pv{1..25} ; do cat << EOF > $LOCAL_PATH/${volume}
{  "apiVersion": "v1",
  "kind": "PersistentVolume",
   "metadata":
   {    "name": "${volume}"  },
    "spec": {
    "capacity": {        "storage": "${volsize}"    },
        "accessModes": [ "ReadWriteOnce" ],
           "nfs": {        "path": $NFS_PATH/${volume}",
                   "server": $SERVERNAME    },
                      "persistentVolumeReclaimPolicy": "Recycle"  }}
EOF
echo "Created def file for ${volume}"; done;


* Create 25 more instances of PersistentVolume (pv26 to pv50) with a size of 10 GB:
$ cat pvtype2.sh
export volsize="10Gi";
export SERVERNAME="192.168.0.254"
export NFS_PATH="/var/export/pvs"
export LOCAL_PATH="/root/pvs"
for volume in pv{26..50} ; do cat << EOF > $LOCAL_PATH/${volume}
{  "apiVersion": "v1",
  "kind": "PersistentVolume",
   "metadata":
   {    "name": "${volume}"  },
    "spec": {
    "capacity": {        "storage": "${volsize}"    },
        "accessModes": [ "ReadWriteOnce" ],
           "nfs": {        "path": $NFS_PATH/${volume}",
                   "server": $SERVERNAME    },
                      "persistentVolumeReclaimPolicy": "Recycle"  }}
EOF
echo "Created def file for ${volume}"; done;


* Create 50 more instances of PersistentVolume (pv51 to pv100) with a size of 1 GB:
$ cat pvtype3.sh
export volsize="1Gi";
export SERVERNAME="192.168.0.254"
export NFS_PATH="/var/export/pvs"
export LOCAL_PATH="/root/pvs"
for volume in pv{51..100} ; do cat << EOF > $LOCAL_PATH/${volume}
{  "apiVersion": "v1",
  "kind": "PersistentVolume",
   "metadata":
   {    "name": "${volume}"  },
    "spec": {
    "capacity": {        "storage": "${volsize}"    },
        "accessModes": [ "ReadWriteOnce" ],
           "nfs": {        "path": $NFS_PATH/${volume}",
                   "server": $SERVERNAME    },
                      "persistentVolumeReclaimPolicy": "Recycle"  }}
EOF
echo "Created def file for ${volume}"; done;

* Allocate three of the 5-GB volumes--pv21, pv22, and pv23--to the default project:

cd /root/pvs
cat pv21 pv22 pv23 | oc create -f - -n default