Create a managed cluster

Create a managed cluster

This section describes how to create an OpenStack-based managed cluster using the Mirantis Container Cloud web UI of the OpenStack-based management cluster.

To create an OpenStack-based managed cluster:

  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.

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

  4. In the Credentials tab:

    1. Click Add Credential to add your OpenStack credentials. You can either upload your OpenStack clouds.yaml configuration file or fill in the fields manually.

    2. Verify that the new credentials status is Ready. If the status is Error, hover over the status to determine the reason of the issue.

  5. In the Clusters tab, click Create Cluster and fill out the form with the following parameters as required:

    1. Configure general settings and the Kubernetes parameters:

      Managed cluster configuration




      General settings


      Cluster name


      Select OpenStack

      Provider credential

      From the drop-down list, select the OpenStack credentials name that you created in the previous step.

      Release version

      The Container Cloud version.

      SSH keys

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


      External network

      Type of the external network in the OpenStack cloud provider.

      DNS name servers

      Comma-separated list of the DNS hosts IPs for the OpenStack VMs configuration.


      Node CIDR

      The Kubernetes nodes CIDR block. For example,

      Services CIDR blocks

      The Kubernetes Services CIDR block. For example,

      Pods CIDR blocks

      The Kubernetes Pods CIDR block. For example,

    2. Configure StackLight:

      StackLight configuration


      Parameter name



      Enable Monitoring

      Selected by default. Deselect to skip StackLight deployment.


      You can also enable, disable, or configure StackLight parameters after deploying a managed cluster. For details, see Change a cluster configuration or Configure StackLight.

      Enable Logging

      Select to deploy the StackLight logging stack. For details about the logging components, see Reference Architecture: StackLight deployment architecture.

      HA Mode

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


      Retention Time

      The Elasticsearch logs retention period in Logstash.

      Persistent Volume Claim Size

      The Elasticsearch persistent volume claim size.


      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
          severity: page
          summary: High request latency

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

  6. Click Create.

    To view the deployment status, verify the cluster status on the Clusters page. Once the orange blinking dot near the cluster name disappears, the deployment is complete.

  7. Proceed with Add a machine.