Bootstrap a management cluster

After you complete the prerequisite steps described in Prerequisites, proceed with bootstrapping your OpenStack-based Mirantis Container Cloud management cluster.

To bootstrap an OpenStack-based management cluster:

  1. Log in to the bootstrap node running Ubuntu 20.04 that is configured as described in Prerequisites.

  2. Prepare the bootstrap script:

    1. Download and run the Container Cloud bootstrap script:

      apt install wget
wget https://binary.mirantis.com/releases/get_container_cloud.sh
chmod 0755 get_container_cloud.sh
./get_container_cloud.sh

    2. Change the directory to the kaas-bootstrap folder created by the script.

  3. Obtain your license file that will be required during the bootstrap:

    1. Create a user account at www.mirantis.com.

    2. Log in to your account and download the mirantis.lic license file.

    3. Save the license file as mirantis.lic under the kaas-bootstrap directory on the bootstrap node.

    4. Verify that mirantis.lic contains the exact Container Cloud license previously downloaded from www.mirantis.com by decoding the license JWT token, for example, using jwt.io.

      Example of a valid decoded Container Cloud license data with the mandatory license field:

      {
    "exp": 1652304773,
    "iat": 1636669973,
    "sub": "demo",
    "license": {
        "dev": false,
        "limits": {
            "clusters": 10,
            "workers_per_cluster": 10
        },
        "openstack": null
    }
}

      Warning

      The MKE license does not apply to mirantis.lic. For details about MKE license, see MKE documentation.

  4. Prepare the OpenStack configuration for a new cluster:

    1. Log in to the OpenStack Horizon.

    2. In the Project section, select API Access.

    3. In the right-side drop-down menu Download OpenStack RC File, select OpenStack clouds.yaml File.

    4. Save the downloaded clouds.yaml file in the kaas-bootstrap folder created by the get_container_cloud.sh script.

    5. In clouds.yaml, add the password field with your OpenStack password under the clouds/openstack/auth section.

      Example:

      clouds:
  openstack:
    auth:
      auth_url: https://auth.openstack.example.com/v3
      username: your_username
      password: your_secret_password
      project_id: your_project_id
      user_domain_name: your_user_domain_name
    region_name: RegionOne
    interface: public
    identity_api_version: 3

    6. Available since Container Cloud 2.17.0. If you deploy Container Cloud on top of MOSK Victoria with Tungsten Fabric and use the default security group for newly created load balancers, add the following rules for Kubernetes API server endpoint, Container Cloud application endpoint, and for MKE web UI and API using the OpenStack CLI:

      • direction='ingress'

      • ethertype='IPv4'

      • protocol='tcp'

      • remote_ip_prefix='0.0.0.0/0'

      • port_range_max and port_range_min:

        • '443' for Kubernetes API and Container Cloud application endpoints

        • '6443' for MKE web UI and API

    7. Verify access to the target cloud endpoint from Docker. For example:

      docker run --rm alpine sh -c "apk add --no-cache curl; \
curl https://auth.openstack.example.com/v3"

      The system output must contain no error records.

    In case of issues, follow the steps provided in Troubleshooting.

  5. Configure the cluster and machines metadata:

    1. In templates/machines.yaml.template, modify the spec:providerSpec:value section for 3 control plane nodes marked with the cluster.sigs.k8s.io/control-plane label by substituting the flavor and image parameters with the corresponding values of the control plane nodes in the related OpenStack cluster. For example:

      spec: &cp_spec
  providerSpec:
    value:
      apiVersion: "openstackproviderconfig.k8s.io/v1alpha1"
      kind: "OpenstackMachineProviderSpec"
      flavor: kaas.minimal
      image: bionic-server-cloudimg-amd64-20190612

      Note

      The flavor parameter value provided in the example above is cloud-specific and must meet the Container Cloud requirements.

      Also, modify other parameters as required.

    2. Modify the templates/cluster.yaml.template parameters to fit your deployment. For example, add the corresponding values for cidrBlocks in the spec::clusterNetwork::services section.

  6. Optional. Available since Container Cloud 2.18.0 as TechPreview. To boot cluster machines from a block storage volume, define the following parameter in the spec:providerSpec section of templates/machines.yaml.template:

    bootFromVolume:
  enabled: true
  volumeSize: 120

    Note

    The minimal storage requirement is 120 GB per node. For details, see Requirements for an OpenStack-based cluster.

    To boot the Bastion node from a volume, add the same parameter to templates/cluster.yaml.template in the spec:providerSpec section for Bastion. The default amount of storage 80 is enough.

  7. Optional. Configure backups for the MariaDB database as described in Configure periodic backups of MariaDB for AWS and OpenStack providers.

  8. Optional if servers from the Ubuntu NTP pool (*.ubuntu.pool.ntp.org) are accessible from the node where the management cluster is being provisioned. Otherwise, this step is mandatory.

    Configure the regional NTP server parameters to be applied to all machines of regional and managed clusters in the specified region.

    In templates/cluster.yaml.template, add the ntp:servers section with the list of required servers names:

    spec:
  ...
  providerSpec:
    value:
      kaas:
      ...
        regional:
          - helmReleases:
            - name: openstack-provider
              values:
                config:
                  lcm:
                    ...
                    ntp:
                      servers:
                      - 0.pool.ntp.org
                      ...
            provider: openstack
            ...

  9. Optional. If you require all Internet access to go through a proxy server, in bootstrap.env, add the following environment variables to bootstrap the management and regional cluster using proxy:

    • HTTP_PROXY

    • HTTPS_PROXY

    • NO_PROXY

    • PROXY_CA_CERTIFICATE_PATH

    Example snippet:

    export HTTP_PROXY=http://proxy.example.com:3128
export HTTPS_PROXY=http://user:pass@proxy.example.com:3128
export NO_PROXY=172.18.10.0,registry.internal.lan
export PROXY_CA_CERTIFICATE_PATH="/home/ubuntu/.mitmproxy/mitmproxy-ca-cert.cer"

    The following formats of variables are accepted:

    Proxy configuration data

    Variable

    Format
    HTTP_PROXY
    HTTPS_PROXY

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

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

    NO_PROXY

    Comma-separated list of IP addresses or domain names

    PROXY_CA_CERTIFICATE_PATH Available since 2.20.0 as GA

    Optional. Path to the proxy CA certificate for man-in-the-middle (MITM) proxies. Must be placed on the bootstrap node to be trusted. For details, see Install a CA certificate for a MITM proxy on a bootstrap node.

    Warning

    If you require Internet access to go through a MITM proxy, ensure that the proxy has streaming enabled as described in Enable streaming for MITM.

    Note

    • Since Container Cloud 2.20.0, this parameter is generally available for the OpenStack, bare metal, Equinix Metal with private networking, AWS, and vSphere providers

    • For MOSK-based deployments, the feature support is available since MOSK 22.4

    • Since Container Cloud 2.18.0, this parameter is available as TechPreview for the OpenStack and bare metal providers only

    • For Azure and Equinix Metal with public networking, the feature is not supported

    For implementation details, see Proxy and cache support.

    For the list of Mirantis resources and IP addresses to be accessible from the Container Cloud clusters, see Requirements for an OpenStack-based cluster.

  10. Optional. Configure external identity provider for IAM.

  11. Optional, Technology Preview in Container Cloud 2.18.0. Removed in Container Cloud 2.19.0 for compatibility reasons, currently not supported. Enables encryption for the Kubernetes workloads network using the following field to the Cluster object spec:

     spec:
   providerSpec:
     value:
       secureOverlay: true

    For more details, see MKE documentation: Kubernetes network encryption.

    • When the option is enabled, Calico networking is configured to use IP-in-IP overlay and BGP routing.

    • When the option is disabled, Calico networking is configured to use VXLAN overlay (no BGP).

  12. Run the bootstrap script:

    ./bootstrap.sh all

    • In case of deployment issues, refer to Troubleshooting and inspect logs.

    • If the script fails for an unknown reason:

      1. Run the cleanup script:

        ./bootstrap.sh cleanup

      2. Rerun the bootstrap script.

  13. When the bootstrap is complete, collect and save the following management cluster details in a secure location:

    • The kubeconfig file located in the same directory as the bootstrap script. This file contains the admin credentials for the management cluster.

    • The private ssh_key for access to the management cluster nodes that is located in the same directory as the bootstrap script.

      Note

      If the initial version of your Container Cloud management cluster was earlier than 2.6.0, ssh_key is named openstack_tmp and is located at ~/.ssh/.

    • The URL for the Container Cloud web UI.

      To create users with permissions required for accessing the Container Cloud web UI, see Create initial users after a management cluster bootstrap.

    • The StackLight endpoints. For details, see Access StackLight web UIs.

    • The Keycloak URL that the system outputs when the bootstrap completes. The admin password for Keycloak is located in kaas-bootstrap/passwords.yml along with other IAM passwords.

    Note

    The Container Cloud web UI and StackLight endpoints are available through Transport Layer Security (TLS) and communicate with Keycloak to authenticate users. Keycloak is exposed using HTTPS and self-signed TLS certificates that are not trusted by web browsers.

    To use your own TLS certificates for Keycloak, refer to Configure TLS certificates for cluster applications.

    Note

    When the bootstrap is complete, the bootstrap cluster resources are freed up.

  14. Optional. Deploy an additional regional cluster as described in Deploy an additional regional cluster (optional).

Now, you can proceed with operating your management cluster using the Container Cloud web UI and deploying managed clusters as described in Create and operate an OpenStack-based managed cluster.

See also