x/development-proposals
Code Issues Proposed changes

Merge "declare data center / region failures out of scope"

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2016-06-06 15:02:10 +00:00
committed by Gerrit Code Review
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user-stories/proposed/ha_vm.rst
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@@ -64,7 +64,19 @@ can be detected and recovered by the system. Possible failure events include:
* Attached Cinder volume failure * Attached Cinder volume failure
* Availability Zone/Data Center/Region failure * Availability Zone failure
* Data Center / Region failure
Failure of a whole region or data center is obviously much more severe,
requiring recovery of not just compute nodes but also OpenStack services in
the control plane. It needs to be covered by a Disaster Recovery plan,
which will vary greatly for each cloud depending on its architecture,
supported workloads, required SLAs, and organizational structure. As such,
a general solution to Disaster Recovery is a problem of considerable
complexity, therefore it makes sense to keep it out of scope for this user
story, which should instead be viewed as a necessary and manageable step on
the long road to that solution.
N.B. This user story concerns high availability, not 100% availability. N.B. This user story concerns high availability, not 100% availability.
Therefore some service interruption is usually expected when failures occur. Therefore some service interruption is usually expected when failures occur.