Managing your cloud resources with OpenStack: Difference between revisions

An example of a CIDR rule is <code>192.168.1.1/24</code>. This looks just like a normal IP address with a <code>/24</code> appended to it. IP addresses are made up of 4, 1-byte (8 bit) numbers ranging from 0 to 255. What this <code>/24</code> means is that this CIDR rule will match the first left most 24 bits (3 bytes) of an IP address. In this case, any IP address starting with <code>192.168.1</code> will match this CIDR rule. If <code>/32</code> is appended, the full 32 bits of the IP address must match exactly; if a <code>/0</code> is appended, no bits must match and therefore any IP address will match it.

A '''volume''' provides storage which is not destroyed when a VM is terminated. On the Compute Canada cloud resources, volumes use [https://en.wikipedia.org/wiki/Ceph_(software) Ceph] storage with a 3-fold replication factor to provide safety against hardware failure. More documentation about OpenStack volumes can be found [https://docs.openstack.org/cinder/latest/cli/cli-manage-volumes.html here].