Deploy a machine to a specific bare metal host¶
Machine in a MOS cluster requires dedicated bare metal host for deployment.
The bare metal hosts are represented by the
in MCC management API. All
BareMetalHost objects must be labeled
upon creation with a label that will allow to identify the host and
assign it to a machine.
The labels may be unique, or applied to a group of hosts, based on similarities in their capacity, capabilities and hardware configuration, on their location, suitable role, or a combination of thereof.
In some cases, you may need to deploy a machine to a specific bare metal host. This is especially useful when some of your bare metal hosts have different hardware configuration than the rest.
To deploy a machine to a specific bare metal host:
Log in to the host where your management cluster
kubeconfigis located and where kubectl is installed.
Identify the bare metal host that you want to associate with the specific machine. For example, host
kubectl get baremetalhost host-1 -o yaml
Add a label that will uniquely identify this host, for example, by the name of the host and machine that you want to deploy on it.
Do not remove any existing labels from the
kubectl edit baremetalhost host-1
kind: BareMetalHost metadata: name: host-1 namespace: myProjectName labels: kaas.mirantis.com/baremetalhost-id: host-1-worker-HW11-cad5 ...
Open the text file with the YAML definition of the
Machineobject, created in Create a machine using CLI.
Add a host selector that matches the label you have added to the
BareMetalHostobject in the previous step.
kind: Machine metadata: name: worker-HW11-cad5 namespace: myProjectName spec: ... providerSpec: value: apiVersion: baremetal.k8s.io/v1alpha1 kind: BareMetalMachineProviderSpec ... hostSelector: matchLabels: kaas.mirantis.com/baremetalhost-id: host-1-worker-HW11-cad5 ...
Once created, this machine will be associated with the specified bare metal host, and you can return to Create a machine using CLI.