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# Availability Zones | ||
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Availability Zones are the most arbitrary domain in a cloud. In a large-scale cloud, they could be mutliple datacenters in the same geographical area, while in a smaller cloud they could be separate data halls in the same datacenter or separate racks in the same data hall. | ||
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Ultimately, because it has no real physical analogue, an Availability Zone is a fancy way of defining a failure domain. What this allows you to do in your cloud design is define an Availability Zone to best suit how you want to separate resources for failure. | ||
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## Designing Services for Multiple Available Zones | ||
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!!! info "To Do" | ||
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Describe how to implement multiple AZs with the following OpenStack Services: | ||
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- Nova | ||
- Neutron | ||
- Cinder | ||
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## Sharing Services Across Availability Zones | ||
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!!! info "To Do" | ||
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Describe how to implement cross-AZ services with the following OpenStack Services: | ||
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- Keystone | ||
- Glance | ||
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... | ||
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## Host Aggregates | ||
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Host Aggregates are a way of grouping hosts in an OpenStack cloud. This allows you to create groups of certain types of hosts and then steer certain classes of VM instances to them. | ||
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## Designing Host Aggregates in OpenStack | ||
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!!! info "To Do" | ||
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Describe how to implement Host Aggregates using the following OpenStack Services: | ||
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- Nova | ||
- Placement | ||
- Glance | ||
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... |
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Original file line number | Diff line number | Diff line change |
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## Host Aggregates | ||
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Host Aggregates are a way of grouping hosts in an OpenStack cloud. This allows you to create groups of certain types of hosts and then steer certain classes of VM instances to them. | ||
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## Designing Host Aggregates in OpenStack | ||
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!!! info "To Do" | ||
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Describe how to implement Host Aggregates using the following OpenStack Services: | ||
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- Nova | ||
- Placement | ||
- Glance | ||
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||
... |
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# Regions | ||
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Regions are separate physical locations served by a single cloud. In OpenStack, a Region is defined as an independently deployed cloud excepting Keystone and Horizon or Skyline. | ||
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## Designing Services for Multiple Available Zones | ||
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!!! info "To Do" | ||
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Describe how to implement a multi-region cloud with the following OpenStack services: | ||
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- Keystone | ||
- Nova | ||
- Neutron | ||
- Cinder | ||
- Glance | ||
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... |