Create a managed bare metal cluster

This section instructs you on how to configure and deploy a managed cluster that is based on the baremetal-based management cluster through the Mirantis Container Cloud web UI.

To create a managed cluster on bare metal:

  1. Log in to the Container Cloud web UI with the writer permissions.

  2. Switch to the required project using the Switch Project action icon located on top of the main left-side navigation panel.

    Caution

    Do not create a new managed cluster for MOSK in the default project (Kubernetes namespace), which is dedicated for the management cluster only. If no projects are defined, first create a new mosk project using Projects > Create in the Container Cloud web UI.

  3. In the SSH keys tab, click Add SSH Key to upload the public SSH key that will be used for the SSH access to VMs.

  4. Optional. In the Proxies tab, enable proxy access to the managed cluster:

    1. Click Add Proxy.

    2. In the Add New Proxy wizard, fill out the form with the following parameters:

      Proxy configuration

      Parameter

      Description

      Proxy Name

      Name of the proxy server to use during a managed cluster creation.

      Region Removed in MOSK 24.1

      From the drop-down list, select the required region.

      HTTP Proxy

      Add the HTTP proxy server domain name in the following format:

      • http://proxy.example.com:port - for anonymous access

      • http://user:password@proxy.example.com:port - for restricted access

      HTTPS Proxy

      Add the HTTPS proxy server domain name in the same format as for HTTP Proxy.

      No Proxy

      Comma-separated list of IP addresses or domain names.

    For the list of Mirantis resources and IP addresses to be accessible from the Container Cloud clusters, see Reference Architecture: Requirements.

  5. In the Clusters tab, click Create Cluster.

  6. Configure the new cluster in the Create New Cluster wizard that opens:

    1. Define general and Kubernetes parameters:

      Create new cluster: General, Provider, and Kubernetes

      Section

      Parameter name

      Description

      General settings

      Cluster name

      The cluster name.

      Provider

      Select Baremetal.

      Region Removed since MOSK 24.1

      From the drop-down list, select Baremetal.

      Release version

      Select a Container Cloud version with the OpenStack label tag. Otherwise, you will not be able to deploy MOSK on this managed cluster.

      Proxy

      Optional. From the drop-down list, select the proxy server name that you have previously created.

      SSH keys

      From the drop-down list, select the SSH key name that you have previously added for SSH access to the bare metal hosts.

      Provider

      LB host IP

      The IP address of the load balancer endpoint that will be used to access the Kubernetes API of the new cluster. This IP address must be in the LCM network if a separate LCM network is in use and if L2 (ARP) announcement of cluster API load balancer IP is in use.

      LB address range Removed in 24.3

      The range of IP addresses that can be assigned to load balancers for Kubernetes Services by MetalLB. For a more flexible MetalLB configuration, refer to Configure MetalLB.

      Note

      Since MOSK 24.3, MetalLB configuration must be added after cluster creation.

      Kubernetes

      Services CIDR blocks

      The Kubernetes Services CIDR blocks. For example, 10.233.0.0/18.

      Pods CIDR blocks

      The Kubernetes pods CIDR blocks. For example, 10.233.64.0/18.

    2. Configure StackLight:

      StackLight configuration

      Section

      Parameter name

      Description

      StackLight

      Enable Monitoring

      Selected by default. Deselect to skip StackLight deployment.

      Note

      You can also enable, disable, or configure StackLight parameters after deploying a managed cluster. For details, see Mirantis Container Cloud Operations Guide:

      Enable Logging

      Select to deploy the StackLight logging stack. For details about the logging components, see Deployment architecture.

      Note

      The logging mechanism performance depends on the cluster log load. In case of a high load, you may need to increase the default resource requests and limits for fluentdLogs. For details, see Mirantis Container Cloud Operations Guide: StackLight resource limits.

      HA Mode

      Select to enable StackLight monitoring in the HA mode. For the differences between HA and non-HA modes, see Deployment architecture.

      StackLight Default Logs Severity Level

      Log severity (verbosity) level for all StackLight components. The default value for this parameter is Default component log level that respects original defaults of each StackLight component. For details about severity levels, see Mirantis Container Cloud Operations Guide: StackLight log verbosity.

      StackLight Component Logs Severity Level

      The severity level of logs for a specific StackLight component that overrides the value of the StackLight Default Logs Severity Level parameter. For details about severity levels, see Mirantis Container Cloud Operations Guide: StackLight log verbosity.

      Expand the drop-down menu for a specific component to display its list of available log levels.

      OpenSearch

      Logstash Retention Time Removed in MOSK 24.1

      Available if you select Enable Logging. Specifies the logstash-* index retention time.

      Events Retention Time

      Available if you select Enable Logging. Specifies the kubernetes_events-* index retention time.

      Notifications Retention Time

      Available if you select Enable Logging. Specifies the notification-* index retention time.

      Persistent Volume Claim Size

      Available if you select Enable Logging. The OpenSearch persistent volume claim size.

      Collected Logs Severity Level

      Available if you select Enable Logging. The minimum severity of all Container Cloud components logs collected in OpenSearch. For details about severity levels, see Mirantis Container Cloud Operations Guide: StackLight logging.

      Prometheus

      Retention Time

      The Prometheus database retention period.

      Retention Size

      The Prometheus database retention size.

      Persistent Volume Claim Size

      The Prometheus persistent volume claim size.

      Enable Watchdog Alert

      Select to enable the Watchdog alert that fires as long as the entire alerting pipeline is functional.

      Custom Alerts

      Specify alerting rules for new custom alerts or upload a YAML file in the following exemplary format:

      - alert: HighErrorRate
  expr: job:request_latency_seconds:mean5m{job="myjob"} > 0.5
  for: 10m
  labels:
    severity: page
  annotations:
    summary: High request latency

      For details, see Official Prometheus documentation: Alerting rules. For the list of the predefined StackLight alerts, see Operations Guide: StackLight alerts.

      StackLight Email Alerts

      Enable Email Alerts

      Select to enable the StackLight email alerts.

      Send Resolved

      Select to enable notifications about resolved StackLight alerts.

      Require TLS

      Select to enable transmitting emails through TLS.

      Email alerts configuration for StackLight

      Fill out the following email alerts parameters as required:

      • To - the email address to send notifications to.

      • From - the sender address.

      • SmartHost - the SMTP host through which the emails are sent.

      • Authentication username - the SMTP user name.

      • Authentication password - the SMTP password.

      • Authentication identity - the SMTP identity.

      • Authentication secret - the SMTP secret.

      StackLight Slack Alerts

      Enable Slack alerts

      Select to enable the StackLight Slack alerts.

      Send Resolved

      Select to enable notifications about resolved StackLight alerts.

      Slack alerts configuration for StackLight

      Fill out the following Slack alerts parameters as required:

      • API URL - The Slack webhook URL.

      • Channel - The channel to send notifications to, for example, #channel-for-alerts.

  7. Click Create.

    To monitor cluster readiness, see Verify cluster status.

  8. Optional. Colocate the OpenStack control plane with the managed cluster Kubernetes manager nodes by adding the following field to the Cluster object spec:

    spec:
  providerSpec:
    value:
      dedicatedControlPlane: false

    Note

    This feature is available as technical preview. Use such configuration for testing and evaluation purposes only.

  9. Optional. Customize MetalLB speakers that are deployed on all Kubernetes nodes except master nodes by default. For details, see Configure the MetalLB speaker node selector.

  10. Configure the MetalLB parameters related to IP address allocation and announcement for load-balanced cluster services. For details, see Configure MetalLB.

  11. Proceed to Workflow of network interface naming.

Note

Once you have created a MOSK cluster, some StackLight alerts may raise as false-positive until you deploy the Mirantis OpenStack environment.