The Metacloud team uses specific patterns for hostnames and other equipment in a Metacloud installation. Understanding the pattern for a hostname helps you identify device attributes, such as its Availability Zones (AZ) or how it is used, which can be helpful in certain situations:
- Troubleshooting a machine, such as a hypervisor on which an instance is not loading
- Determining the URL for a Dashboard or API endpoint in a given Availability Zone (AZ)
- Labeling hardware in a data center
Hostname Patterns for Devices
Metacloud Administrators can see hostnames in various Dashboard views, such as System Info, or via command line by running the
openstack service list command. Refer to the following examples when looking at the table of hostname elements:
|mcp[N]||The device is a Metacloud Control Plane (MCP)*, as in the first example. The letters precede a numeral that distinguishes it from the other two MCPs. An installation includes three MCPs.|
|mhv[N]||The device is a Metacloud Hypervisor (MHV)*, as in the second example. The letters precede a numeral that distinguishes it from other MHVs. An installation may include up to 400 MHVs.|
|Availability Zone (AZ)[N]||An AZ abbreviation contains three to five letters preceding a numeral that distinguishes a given AZ from others in the same organization.|
|oob||This indicates an out-of-band network device.|
* If the hostname does not include the mcp or mhv element, the device is something else, such as a switch or router.
Dashboard and API endpoint URLs
The following conventions apply to URLs in Metacloud installations, unless your organization requests otherwise.
The only variable in a Dashboard URL is the availability zone, as in the following example:
The letters AZ precede a numeral that distinguishes it from other AZs in your organization.
API endpoint URLs include variables for port number, API version number, and project ID, in addition to the AZ:
TIP: For related information about Availability Zones (AZ) and Aggregates for Metacloud refer to the Metacloud Administrator Guide in the topic Capacity Planning for availability zones information, and in the topic Creating and Managing Host Aggregates for host aggregates information.