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====== Creating new instance ======

Creating new instances in OpenStack fall into 3 categories

  * Independent isolated instances
  * An IDMS Cluster
  * An RDF Cluster


===== Some notes/warnings =====

====== Adding a volume to an instance ======
Reference Material [[https://www.darwinbiler.com/openstack-creating-and-attaching-a-volume-into-an-instance/]]

When adding a volume to an instance, for example on a MySQL DB Instance you must manually edit the **/etc/fstab**

For example, as of now, the IDMS Ironman cluster has a DB instance - IronmanDB1.err

Volumes Attached 
  * Attached To 7ce1bcf3-a494-4902-9c8b-42765d3c1a12 on /dev/vda
  * Attached To os4db1 on /dev/vdb

The os4db1 volume is defined as
  * Name        os4db1
  * ID          db6be9ca-b8c1-454e-973d-b55f4d75693b
  * Description snapshot created from or20-idmsdb1
  * Project ID  4cd57af0ccdc4827a7ffa979678943d5
  * Status      In-use 
  * Group.      -
  * Size        650 GiB

The /etc/fstab is
[scotty@ironmandb1 ~]$ cat /etc/fstab

  * #
  * # /etc/fstab
  * # Created by anaconda on Mon Jan 28 20:51:49 2019
  * #
  * # Accessible filesystems, by reference, are maintained under '/dev/disk'
  * # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info
  * #
  * UUID=f41e390f-835b-4223-a9bb-9b45984ddf8d /                       xfs     defaults        0 0
  * #/dev/vdb	none	swap	sw,comment=cloudconfig	0	0
  * **UUID=51b68e38-676f-40c6-b690-c81b09c099c0 /mysql xfs defaults 0 1
  * **

The UUID is established on 
  * [scotty@ironmandb1 ~]$ sudo blkid
  * [sudo] password for scotty: 
  * /dev/vda1: UUID="f41e390f-835b-4223-a9bb-9b45984ddf8d" TYPE="xfs" 
  * /dev/vdb1: **UUID="51b68e38-676f-40c6-b690-c81b09c099c0"** TYPE="xfs" 

===== Troubleshooting =====

If volumes are stuck in a state i.e. deleting or creating, the cinder services may need a restart. Deleting or creating a volume should output to the /var/log/cinder/cinder-scheduler.log and /var/log/cinder/cinder-volume.log logs. If this is halted or slow, restart the cinder services.

<code>
sudo service cinder-scheduler restart
sudo service cinder-volume restart
</code>
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