Deploy an OpenStack cluster

Deploy an OpenStack cluster

This section instructs you on how to deploy OpenStack on top of Kubernetes using the OpenStack Controller and openstackdeployments.lcm.mirantis.com (OsDpl) CR.

To deploy an OpenStack cluster:

  1. Verify that you have pre-configured the networking according to MOS Reference Architecture: Networking.

  2. Verify that the TLS certificates that will be required for the OpenStack cluster deployment have been pre-generated.

    Note

    The Transport Layer Security (TLS) protocol is mandatory on public endpoints.

    Caution

    To avoid certificates renewal with subsequent OpenStack updates during which additional services with new public endpoints may appear, we recommend using wildcard SSL certificates for public endpoints. For example, *.it.just.works, where it.just.works is a cluster public domain.

    The sample code block below illustrates how to generate a self-signed certificate for the it.just.works domain. The procedure presumes the cfssl and cfssljson tools are installed on the machine.

    mkdir cert && cd cert
    
    tee ca-config.json << EOF
    {
      "signing": {
        "default": {
          "expiry": "8760h"
        },
        "profiles": {
          "kubernetes": {
            "usages": [
              "signing",
              "key encipherment",
              "server auth",
              "client auth"
            ],
            "expiry": "8760h"
          }
        }
      }
    }
    EOF
    
    tee ca-csr.json << EOF
    {
      "CN": "kubernetes",
      "key": {
        "algo": "rsa",
        "size": 2048
      },
      "names":[{
        "C": "<country>",
        "ST": "<state>",
        "L": "<city>",
        "O": "<organization>",
        "OU": "<organization unit>"
      }]
    }
    EOF
    
    cfssl gencert -initca ca-csr.json | cfssljson -bare ca
    
    tee server-csr.json << EOF
    {
        "CN": "*.it.just.works",
        "hosts":     [
            "*.it.just.works"
        ],
        "key":     {
            "algo": "rsa",
            "size": 2048
        },
        "names": [    {
            "C": "US",
            "L": "CA",
            "ST": "San Francisco"
        }]
    }
    EOF
    cfssl gencert -ca=ca.pem -ca-key=ca-key.pem --config=ca-config.json -profile=kubernetes server-csr.json | cfssljson -bare server
    
  3. Create the openstackdeployment.yaml file that will include the OpenStack cluster deployment configuration.

    Note

    The resource of kind OpenStackDeployment (OsDpl) is a custom resource defined by a resource of kind CustomResourceDefinition. The resource is validated with the help of the OpenAPI v3 schema.

  4. Configure the OsDpl resource depending on the needs of your deployment. For the configuration details, refer to MOS Reference Architecture: OpenStackDeployment resource.

    Example of an OsDpl CR of minimum configuration:

    apiVersion: lcm.mirantis.com/v1alpha1
    kind: OpenStackDeployment
    metadata:
      name: openstack-cluster
      namespace: openstack
    spec:
      openstack_version: ussuri
      preset: compute
      size: tiny
      internal_domain_name: cluster.local
      public_domain_name: it.just.works
      features:
        ssl:
          public_endpoints:
            api_cert: |-
              # Update server certificate content
            api_key: |-
              # Update server private key content
            ca_cert: |-
              # Update CA certificate content
        neutron:
          tunnel_interface: ens3
          external_networks:
            - physnet: physnet1
              interface: veth-phy
              bridge: br-ex
              network_types:
               - flat
              vlan_ranges: null
              mtu: null
          floating_network:
            enabled: False
        nova:
          live_migration_interface: ens3
          images:
            backend: local
    
  5. If required, enable DPDK, huge pages, and other supported Telco features as described in Advanced OpenStack configuration (optional).

  6. To the openstackdeployment object, add information about the TLS certificates:

    • ssl:public_endpoints:ca_cert - CA certificate content (ca.pem)

    • ssl:public_endpoints:api_cert - server certificate content (server.pem)

    • ssl:public_endpoints:api_key - server private key (server-key.pem)

  7. Verify that the Load Balancer network does not overlap your corporate or internal Kubernetes networks, for example, Calico IP pools. Also, verify that the pool of Load Balancer network is big enough to provide IP addresses for all Amphora VMs (loadbalancers).

    If required, reconfigure the Octavia network settings using the following sample structure:

    spec:
      services:
        load-balancer:
          octavia:
            values:
              octavia:
                settings:
                  lbmgmt_cidr: "10.255.0.0/16"
                  lbmgmt_subnet_start: "10.255.1.0"
                  lbmgmt_subnet_end: "10.255.255.254"
    
  8. Trigger the OpenStack deployment:

    kubectl apply -f openstackdeployment.yaml
    
  9. Monitor the status of your OpenStack deployment:

    kubectl -n openstack get pods
    kubectl -n openstack describe osdpl osh-dev
    
  10. Assess the current status of the OpenStack deployment using the status section output in the OsDpl resource:

    1. Get the OsDpl YAML file:

      kubectl -n openstack get osdpl osh-dev -o yaml
      
    2. Analyze the status output using the detailed description in MOS Reference Architecture: OpenStackDeployment resource: The Status elements.

  11. Verify that the OpenStack cluster has been deployed:

    clinet_pod_name=$(kubectl -n openstack get pods -l application=keystone,component=client  | grep keystone-client | head -1 | awk '{print $1}')
    kubectl -n openstack exec -it $clinet_pod_name -- openstack service list
    

    Example of a positive system response:

    +----------------------------------+---------------+----------------+
    | ID                               | Name          | Type           |
    +----------------------------------+---------------+----------------+
    | 159f5c7e59784179b589f933bf9fc6b0 | cinderv3      | volumev3       |
    | 6ad762f04eb64a31a9567c1c3e5a53b4 | keystone      | identity       |
    | 7e265e0f37e34971959ce2dd9eafb5dc | heat          | orchestration  |
    | 8bc263babe9944cdb51e3b5981a0096b | nova          | compute        |
    | 9571a49d1fdd4a9f9e33972751125f3f | placement     | placement      |
    | a3f9b25b7447436b85158946ca1c15e2 | neutron       | network        |
    | af20129d67a14cadbe8d33ebe4b147a8 | heat-cfn      | cloudformation |
    | b00b5ad18c324ac9b1c83d7eb58c76f5 | radosgw-swift | object-store   |
    | b28217da1116498fa70e5b8d1b1457e5 | cinderv2      | volumev2       |
    | e601c0749ce5425c8efb789278656dd4 | glance        | image          |
    +----------------------------------+---------------+----------------+