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new fffd87d hypervisor/host capabilities (#240)
fffd87d is described below
commit fffd87dbe90c301a92be2103d094f5641b0d2890
Author: Abhishek Kumar <[email protected]>
AuthorDate: Mon Nov 15 14:30:07 2021 +0530
hypervisor/host capabilities (#240)
* hypervisor/host capabilities
Signed-off-by: Abhishek Kumar <[email protected]>
* format
Signed-off-by: Abhishek Kumar <[email protected]>
* fix
* api note
Signed-off-by: Abhishek Kumar <[email protected]>
---
source/adminguide/hosts.rst | 21 +++++++++++++++++++--
1 file changed, 19 insertions(+), 2 deletions(-)
diff --git a/source/adminguide/hosts.rst b/source/adminguide/hosts.rst
index 467370f..9a593fd 100644
--- a/source/adminguide/hosts.rst
+++ b/source/adminguide/hosts.rst
@@ -207,6 +207,23 @@ any system that is not up to date with patches.
<http://docs.cloudstack.org/Knowledge_Base/Possible_VM_corruption_if_XenServer_Hotfix_is_not_Applied/Highly_Recommended_Hotfixes_for_XenServer_5.6_SP2>`_.
+Hypervisor Capabilities
+-----------------------
+For different hypervisors and their versions, various capabilities such as
maximum number of guest VMs per host, maximum number of volumes per VM,
security group support, etc are considered by CloudStack. These capabilities
are stored in the **cloud.hypervisor_capabilities** table in the database. If a
specific hypervisor version is not available in the database, values against
the *default* version for the hypervisor will be used.
+These capabilities can be listed using API - ``listHypervisorCapabilities``.
Some of the hypervisor capabilities can also be updated for a hypervisor type
and version combination using API - ``updateHypervisorCapabilities``.
+
+Following hypervisor-specific documentations can be referred for different
maximums for a particular hypervisor host:
+
+- VMware: `VMware Configuration Maximum tool
<https://configmax.vmware.com/guest?vmwareproduct=vSphere&release=vSphere%207.0&categories=1-0,2-0>`_.
+
+- Citrix Hypervisor/Xenserver/XCP-ng: `Configuration limits | Citrix
Hypervisor 8.2
<https://docs.citrix.com/en-us/citrix-hypervisor/system-requirements/configuration-limits.html>`_.
+
+
+.. note::
+ Guest VM limit check is not done while deploying a VM on a KVM hypervisor
host.
+
+
+
Changing Host Password
----------------------
@@ -366,8 +383,8 @@ administrator must set CONFIG\_VIRTIO\_BALLOON=y in the
virtio
configuration.
-Hypervisor capabilities
-^^^^^^^^^^^^^^^^^^^^^^^
+Hypervisor capability
+^^^^^^^^^^^^^^^^^^^^^
The hypervisor must be capable of using the memory ballooning.
