Browse Source

Clarify risks of not using shared storage

Make it clearer what the risks of not using shared storage are.
Information is based on:

  http://docs.openstack.org/user-guide-admin/cli_nova_evacuate.html

which says "The command rebuilds the instance from the original image or
volume" but later says that "To preserve the user disk data on the
evacuated server, deploy Compute with a shared file system" and then use
--on-shared-storage.

Change-Id: I09600414eb0d7fff1cf301b11b3fa9a76fc08c77
Adam Spiers 3 years ago
parent
commit
75dcff3b9d
2 changed files with 12 additions and 2 deletions
  1. 6
    1
      ocf/NovaCompute
  2. 6
    1
      ocf/NovaEvacuate

+ 6
- 1
ocf/NovaCompute View File

@@ -120,7 +120,12 @@ This option should be used with caution.
120 120
 
121 121
 <parameter name="no_shared_storage" unique="0" required="0">
122 122
 <longdesc lang="en">
123
-Disable shared storage recovery for instances. Use at your own risk!
123
+Indicate that nova storage for instances is not shared across compute
124
+nodes. This must match the reality of how nova storage is configured!
125
+Otherwise VMs could end up in error state upon evacuation. When
126
+storage is non-shared, instances on dead hypervisors will be rebuilt
127
+from their original image or volume, so anything on ephemeral storage
128
+will be lost.
124 129
 </longdesc>
125 130
 <shortdesc lang="en">Disable shared storage recovery for instances</shortdesc>
126 131
 <content type="boolean" default="0" />

+ 6
- 1
ocf/NovaEvacuate View File

@@ -120,7 +120,12 @@ This option should be used with caution.
120 120
 
121 121
 <parameter name="no_shared_storage" unique="0" required="0">
122 122
 <longdesc lang="en">
123
-Disable shared storage recovery for instances. Use at your own risk!
123
+Indicate that nova storage for instances is not shared across compute
124
+nodes. This must match the reality of how nova storage is configured!
125
+Otherwise VMs could end up in error state upon evacuation. When
126
+storage is non-shared, instances on dead hypervisors will be rebuilt
127
+from their original image or volume, so anything on ephemeral storage
128
+will be lost.
124 129
 </longdesc>
125 130
 <shortdesc lang="en">Disable shared storage recovery for instances</shortdesc>
126 131
 <content type="boolean" default="0" />

Loading…
Cancel
Save