Create a machine using web UI¶
After you add bare metal hosts and create a managed cluster as described in Create a managed cluster, proceed with associating Kubernetes machines of your cluster with the previously added bare metal hosts using the Mirantis Container Cloud web UI.
To add a Kubernetes machine to a baremetal-based managed cluster:
Log in to the Mirantis Container Cloud web UI with the
Switch to the required project using the Switch Project action icon located on top of the main left-side navigation panel.
In the Clusters tab, click the required cluster name. The cluster page with the Machines list opens.
Click Create Machine button.
Fill out the Create New Machine form as required:
Specify the number of machines to add.
Select Manager or Worker to create a Kubernetes manager or worker node. The required minimum number of machines is three for the manager nodes HA and two for the Container Cloud workloads.
- BareMetal Host Label
Assign the role to the new machine(s) to link the machine to a previously created bare metal host with the corresponding label. You can assign one role type per machine. The supported labels include:
The default role for any node in a managed cluster. Only the
kubeletservice is running on the machines of this type.
This node hosts the manager services of a managed cluster. For the reliability reasons, Container Cloud does not permit running end user workloads on the manager nodes or use them as storage nodes.
This node is a worker node that also hosts Ceph OSDs and provides its disk resources to Ceph. Container Cloud permits end users to run workloads on storage nodes by default.
- Node Labels
Select the required node labels for the worker machine to run certain components on a specific node. For example, for the StackLight nodes that run Elasticsearch and require more resources than a standard node, select the StackLight label. The list of available node labels is obtained from your current
If you deploy StackLight in the HA mode (recommended):
Add the StackLight label to minimum three worker nodes. Otherwise, StackLight will not be deployed until the required number of worker nodes is configured with the StackLight label.
Removal of the StackLight label from worker nodes along with removal of worker nodes with StackLight label can cause the StackLight components to become inaccessible. It is important to correctly maintain the worker nodes where the StackLight local volumes were provisioned. For details, see Delete a machine.
To obtain the list of nodes where StackLight is deployed, refer to Upgrade managed clusters with StackLight deployed in HA mode.
You can add node labels after deploying a worker machine. On the Machines page, click the More action icon in the last column of the required machine field and select Configure machine.
- L2 Template
From the drop-down list, select the previously created L2 template, if any. For details, see Create L2 templates. Otherwise, leave the default selection to use a preinstalled L2 template.
- BM Host Profile
From the drop-down list, select the previously created custom bare metal host profile, if any. For details, see Create a custom bare metal host profile. Otherwise, leave the default selection.
At this point, Container Cloud adds the new machine object to the specified managed cluster. And the Bare Metal Operator controller creates the relation to
BareMetalHostwith the labels matching the roles.
Provisioning of the newly created machine starts when the machine object is created and includes the following stages:
Creation of partitions on the local disks as required by the operating system and the Container Cloud architecture.
Configuration of the network interfaces on the host as required by the operating system and the Container Cloud architecture.
Installation and configuration of the Container Cloud LCM agent.
Repeat the steps above for the remaining machines.
Monitor the deploy or update live status of the machine:
- Quick status
On the Clusters page, in the Managers or Workers columns. The green status icon indicates that the machine is Ready, the orange status icon indicates that the machine is Updating.
- Detailed status
In the Machines section of a particular cluster page, in the Status column. Hover over a particular machine status icon to verify the deploy or update status of a specific machine component.
You can monitor the status of the following machine components:
Readiness of a node in a Kubernetes cluster, as reported by kubelet
Health and readiness of a node in a Docker Swarm cluster
LCM readiness status of a node
Readiness of a node in the underlying infrastructure (virtual or bare metal, depending on the provider type)
The machine creation starts with the Provision status. During provisioning, the machine is not expected to be accessible since its infrastructure (VM, network, and so on) is being created.
Other machine statuses are the same as the LCMMachine object states described in LCM controller.
Once the status changes to Ready, the deployment of the managed cluster components on this machine is complete.
Now, proceed to Add a Ceph cluster.