Configuration

This page lists the custom configuration options available, including their default values and if they are optional. The following example shows how these variables can be used inside the cluster.yaml file under spec.topology.variables.

Example

apiVersion: cluster.x-k8s.io/v1beta1
kind: Cluster
metadata:
  name:
  namespace:
  labels:
    managed-secret: cloud-config
spec:
  clusterNetwork:
    pods:
      cidrBlocks:
        - 192.168.0.0/16
    serviceDomain: cluster.local
    services:
      cidrBlocks:
        - 10.96.0.0/12
  topology:
    variables: // <-- variables from the table can be set here
      - name: controller_flavor
        value: "SCS-4V-8-20"
      - name: worker_flavor
        value: "SCS-4V-8-20"
      - name: external_id
        value: "ebfe5546-f09f-4f42-ab54-094e457d42ec"
    class: openstack-alpha-1-29-v2
    controlPlane:
      replicas: 2
    version: v1.29.3
    workers:
      machineDeployments:
        - class: openstack-alpha-1-29-v2
          failureDomain: nova
          name: openstack-alpha-1-29-v2
          replicas: 4

Variables from the table containing a . are to be used in an object with the part before the dot being the object name and the part behind the dot being the value names. The following example demonstrates this with oidc_config.

---
topology:
  variables:
    - name: oidc_config
      value:
        issuer_url: "https://dex.k8s.scs.community"
        client_id: "kubectl"

Available variables

Name	Type	Default	Example	Description	Required
external_id	string	""	"ebfe5546-f09f-4f42-ab54-094e457d42ec"	ExternalNetworkID is the ID of an external OpenStack Network. This is necessary to get public internet to the VMs.	False
controller_flavor	string	"SCS-2V-4-20s"	"SCS-2V-4-20s"	OpenStack instance flavor for control-plane nodes.	False
worker_flavor	string	"SCS-2V-4"	"SCS-2V-4"	OpenStack instance flavor for worker nodes.	False
controller_root_disk	integer		25	Root disk size in GiB for control-plane nodes. OpenStack volume will be created and used instead of an ephemeral disk defined in flavor. Should only be used for the diskless flavors.	False
worker_root_disk	integer	25	25	Root disk size in GiB for worker nodes. OpenStack volume will be created and used instead of an ephemeral disk defined in flavor. Should be used for the diskless flavors.	False
openstack_security_groups	array	[]	['security-group-1']	The names of the security groups to assign to the instance	False
cloud_name	string	"openstack"	"openstack"	The name of the cloud to use from the clouds secret	False
secret_name	string	"openstack"	"openstack"	The name of the clouds secret	False
controller_server_group_id	string	""	"3adf4e92-bb33-4e44-8ad3-afda9dfe8ec3"	The server group to assign the control plane nodes to.	False
worker_server_group_id	string	""	"869fe071-1e56-46a9-9166-47c9f228e297"	The server group to assign the worker nodes to.	False
ssh_key	string	""	"capi-keypair"	The ssh key to inject in the nodes.	False
apiserver_loadbalancer	string	"octavia-amphora"	"none, octavia-amphora, octavia-ovn"	"In this cluster-stack we have two kind of loadbalancers. Each of them has its own configuration variable. This setting here is to configure the loadbalancer that is placed in front of the apiserver. You can choose from 2 options: none: No loadbalancer solution will be deployed octavia-amphora: (default) Uses openstack's loadbalancer service (provider:amphora) octavia-ovn: Uses openstack's loadbalancer service (provider:ovn)	False
dns_nameservers	array	['5.1.66.255', '185.150.99.255']	['5.1.66.255', '185.150.99.255']	"DNSNameservers is the list of nameservers for the OpenStack Subnet being created. Set this value when you need to create a new network/subnet while the access through DNS is required.	False
node_cidr	string	"10.8.0.0/20"	"10.8.0.0/20"	"NodeCIDR is the OpenStack Subnet to be created. Cluster actuator will create a network, a subnet with NodeCIDR, and a router connected to this subnet. If you leave this empty, no network will be created.	False
certSANs	array	[]	['mydomain.example']	CertSANs sets extra Subject Alternative Names for the API Server signing cert.	False
oidc_config.client_id	string		kubectl	A client id that all tokens must be issued for.
oidc_config.issuer_url	string		https://dex.example.com	URL of the provider that allows the API server to dis cover public signing keys. Only URLs that use the https:// scheme are acc epted. This is typically the provider's discovery URL, changed to have an emp ty path
oidc_config.username_claim	string	preferred_username	preferred_username	JWT claim to use as the user name. By default sub, whi ch is expected to be a unique identifier of the end user. Admins can choose oth er claims, such as email or name, depending on their provider. However, cla ims other than email will be prefixed with the issuer URL to prevent naming cla shes with other plugins.
oidc_config.groups_claim	string	groups	groups	JWT claim to use as the user's group. If the claim is present it must be an array of strings.
oidc_config.username_prefix	string	oidc:	oidc:	Prefix prepended to username claims to prevent cla shes with existing names (such as system: users). For example, the value oid c: will create usernames like oidc:jane.doe. If this flag isn't provided and --o idc-username-claim is a value other than email the prefix defaults to ( Iss uer URL )# where ( Issuer URL ) is the value of --oidc-issuer-url. The value - c an be used to disable all prefixing.
oidc_config.groups_prefix	string	oidc:	oidc:	Prefix prepended to group claims to prevent clashes wit h existing names (such as system: groups). For example, the value oidc: will cre ate group names like oidc:engineering and oidc:infra.
network_mtu	integer		1500	NetworkMTU sets the maximum transmission unit (MTU) value to address fragmentation for the private network ID.	False
controlPlaneAvailabilityZones	array		['nova']	ControlPlaneAvailabilityZones is the set of availability zones which control plane machines may be deployed to.	False
controlPlaneOmitAvailabilityZone	boolean		True	ControlPlaneOmitAvailabilityZone causes availability zone to be omitted when creating control plane nodes, allowing the Nova scheduler to make a decision on which availability zone to use based on other scheduling constraints.	False