«Compute hosts» tab¶
Tab displays list of compute hosts and their load in the context of resources:
This list displays only those hosts that meet the following conditions:
- the host is computational;
- the host is active;
- balancing is allowed for the host aggregate.
Field name | Description |
---|---|
Hostname | Name of the hypervisor. It is set when it is added. It is also a link to go to detailed information about this hypervisor. Number at the end of the name indicates the number of instances located on the host. |
Host title | Title of the hypervisor. It is changed in the general list. |
Host Aggregates | Name of compute host aggregate. |
Reserved | Flag indicating that host belongs to the reserve list. Possible values are:
|
RAM | Percentage of load on the RAM of the compute host. |
vCPU | Percentage of load on the processor of the compute host. |
Disk | Percentage of load on the disk space of the compute host. |
Sorting and filtering tools are available for the list of compute hosts. Filtration is performed according to the following parameters:
- Hostname;
- Host title;
- Type;
- Host aggregates;
- Reserved.
N | Action | Description |
---|---|---|
1 | Automatic balancing | Automatic distribution of instances between selected compute hosts in order to optimize the use of RAM. Moving instances from one compute host to another is done by migration. |
Also on the page you can see list of instances located on the host, for this use the drop-down list:
Each field has sorting tool. By default, the list of instances is sorted by the amount of RAM.
N | Action | Description |
---|---|---|
1 | Balance | Live migration of instance to the optimal host. |
Features of working¶
Automatic balancing¶
Important
Automatic balancing is performed only if the value of the parameter enabled
is True
in the section balancing
of the configuration file CloudManager. Balancing is performed only for host located in the same Availability Zone.
Important
Action is available only for hosts that are not included in the nova availability zone, and for which aggregates where balancing is allowed: there is metadata allow_balancing =True.
Select required compute hosts and start group action «Automatic balancing»:
Confirm automatic balancing of selected hosts:
Balancing instances¶
Note
Balancing is available only for instances with the status «Active».
Function is available in the dropdown list of the compute host:
Select the required instance and balance they. During the balancing process, the instance will be moved to the optimal host.