constellation/bootstrapper/internal/kubernetes/cloud_provider.go
Otto Bittner 52ceced223 AB#2255: Fix kubeadm version incompatibility (#293)
* Update image version
* Introduce 'ValidK8sVersion' type. Ensures that consumers
of the k8sVersion receive a valid version, without
having to do their own validation.
* Add testcase to check that kubeadm accepts the currently provided
version.
2022-07-22 15:05:04 +02:00

232 lines
8.2 KiB
Go

package kubernetes
import (
"context"
"github.com/edgelesssys/constellation/bootstrapper/internal/kubernetes/k8sapi/resources"
"github.com/edgelesssys/constellation/internal/cloud/metadata"
"github.com/edgelesssys/constellation/internal/versions"
k8s "k8s.io/api/core/v1"
)
// ProviderMetadata implementers read/write cloud provider metadata.
type ProviderMetadata interface {
// List retrieves all instances belonging to the current Constellation.
List(ctx context.Context) ([]metadata.InstanceMetadata, error)
// Self retrieves the current instance.
Self(ctx context.Context) (metadata.InstanceMetadata, error)
// GetSubnetworkCIDR retrieves the subnetwork CIDR for the current instance.
GetSubnetworkCIDR(ctx context.Context) (string, error)
// SupportsLoadBalancer returns true if the cloud provider supports load balancers.
SupportsLoadBalancer() bool
// GetLoadBalancerIP retrieves the load balancer IP.
GetLoadBalancerIP(ctx context.Context) (string, error)
// GetInstance retrieves an instance using its providerID.
GetInstance(ctx context.Context, providerID string) (metadata.InstanceMetadata, error)
// Supported is used to determine if metadata API is implemented for this cloud provider.
Supported() bool
}
// CloudControllerManager implementers provide configuration for the k8s cloud-controller-manager.
type CloudControllerManager interface {
// Image returns the container image used to provide cloud-controller-manager for the cloud-provider.
Image(k8sVersion versions.ValidK8sVersion) (string, error)
// Path returns the path used by cloud-controller-manager executable within the container image.
Path() string
// Name returns the cloud-provider name as used by k8s cloud-controller-manager (k8s.gcr.io/cloud-controller-manager).
Name() string
// ExtraArgs returns a list of arguments to append to the cloud-controller-manager command.
ExtraArgs() []string
// ConfigMaps returns a list of ConfigMaps to deploy together with the k8s cloud-controller-manager
// Reference: https://kubernetes.io/docs/concepts/configuration/configmap/ .
ConfigMaps(instance metadata.InstanceMetadata) (resources.ConfigMaps, error)
// Secrets returns a list of secrets to deploy together with the k8s cloud-controller-manager.
// Reference: https://kubernetes.io/docs/concepts/configuration/secret/ .
Secrets(ctx context.Context, providerID, cloudServiceAccountURI string) (resources.Secrets, error)
// Volumes returns a list of volumes to deploy together with the k8s cloud-controller-manager.
// Reference: https://kubernetes.io/docs/concepts/storage/volumes/ .
Volumes() []k8s.Volume
// VolumeMounts a list of of volume mounts to deploy together with the k8s cloud-controller-manager.
VolumeMounts() []k8s.VolumeMount
// Env returns a list of k8s environment key-value pairs to deploy together with the k8s cloud-controller-manager.
Env() []k8s.EnvVar
// Supported is used to determine if cloud controller manager is implemented for this cloud provider.
Supported() bool
}
// CloudNodeManager implementers provide configuration for the k8s cloud-node-manager.
type CloudNodeManager interface {
// Image returns the container image used to provide cloud-node-manager for the cloud-provider.
Image(k8sVersion versions.ValidK8sVersion) (string, error)
// Path returns the path used by cloud-node-manager executable within the container image.
Path() string
// ExtraArgs returns a list of arguments to append to the cloud-node-manager command.
ExtraArgs() []string
// Supported is used to determine if cloud node manager is implemented for this cloud provider.
Supported() bool
}
// ClusterAutoscaler implementers provide configuration for the k8s cluster-autoscaler.
type ClusterAutoscaler interface {
// Name returns the cloud-provider name as used by k8s cluster-autoscaler.
Name() string
// Secrets returns a list of secrets to deploy together with the k8s cluster-autoscaler.
Secrets(providerID, cloudServiceAccountURI string) (resources.Secrets, error)
// Volumes returns a list of volumes to deploy together with the k8s cluster-autoscaler.
Volumes() []k8s.Volume
// VolumeMounts returns a list of volume mounts to deploy together with the k8s cluster-autoscaler.
VolumeMounts() []k8s.VolumeMount
// Env returns a list of k8s environment key-value pairs to deploy together with the k8s cluster-autoscaler.
Env() []k8s.EnvVar
// Supported is used to determine if cluster autoscaler is implemented for this cloud provider.
Supported() bool
}
type stubProviderMetadata struct {
GetLoadBalancerIPErr error
GetLoadBalancerIPResp string
GetSubnetworkCIDRErr error
GetSubnetworkCIDRResp string
ListErr error
ListResp []metadata.InstanceMetadata
SelfErr error
SelfResp metadata.InstanceMetadata
GetInstanceErr error
GetInstanceResp metadata.InstanceMetadata
SupportedResp bool
SupportsLoadBalancerResp bool
}
func (m *stubProviderMetadata) GetLoadBalancerIP(ctx context.Context) (string, error) {
return m.GetLoadBalancerIPResp, m.GetLoadBalancerIPErr
}
func (m *stubProviderMetadata) GetSubnetworkCIDR(ctx context.Context) (string, error) {
return m.GetSubnetworkCIDRResp, m.GetSubnetworkCIDRErr
}
func (m *stubProviderMetadata) List(ctx context.Context) ([]metadata.InstanceMetadata, error) {
return m.ListResp, m.ListErr
}
func (m *stubProviderMetadata) Self(ctx context.Context) (metadata.InstanceMetadata, error) {
return m.SelfResp, m.SelfErr
}
func (m *stubProviderMetadata) GetInstance(ctx context.Context, providerID string) (metadata.InstanceMetadata, error) {
return m.GetInstanceResp, m.GetInstanceErr
}
func (m *stubProviderMetadata) Supported() bool {
return m.SupportedResp
}
func (m *stubProviderMetadata) SupportsLoadBalancer() bool {
return m.SupportsLoadBalancerResp
}
type stubCloudControllerManager struct {
SupportedResp bool
}
func (m *stubCloudControllerManager) Image(k8sVersion versions.ValidK8sVersion) (string, error) {
return "stub-image:latest", nil
}
func (m *stubCloudControllerManager) Path() string {
return "/stub-controller-manager"
}
func (m *stubCloudControllerManager) Name() string {
return "stub"
}
func (m *stubCloudControllerManager) ExtraArgs() []string {
return []string{}
}
func (m *stubCloudControllerManager) ConfigMaps(instance metadata.InstanceMetadata) (resources.ConfigMaps, error) {
return []*k8s.ConfigMap{}, nil
}
func (m *stubCloudControllerManager) Secrets(ctx context.Context, instance, cloudServiceAccountURI string) (resources.Secrets, error) {
return []*k8s.Secret{}, nil
}
func (m *stubCloudControllerManager) Volumes() []k8s.Volume {
return []k8s.Volume{}
}
func (m *stubCloudControllerManager) VolumeMounts() []k8s.VolumeMount {
return []k8s.VolumeMount{}
}
func (m *stubCloudControllerManager) Env() []k8s.EnvVar {
return []k8s.EnvVar{}
}
func (m *stubCloudControllerManager) Supported() bool {
return m.SupportedResp
}
type stubCloudNodeManager struct {
SupportedResp bool
ImageResp string
PathResp string
ExtraArgsResp []string
}
func (m *stubCloudNodeManager) Image(k8sVersion versions.ValidK8sVersion) (string, error) {
return m.ImageResp, nil
}
func (m *stubCloudNodeManager) Path() string {
return m.PathResp
}
func (m *stubCloudNodeManager) ExtraArgs() []string {
return m.ExtraArgsResp
}
func (m *stubCloudNodeManager) Supported() bool {
return m.SupportedResp
}
type stubClusterAutoscaler struct {
SupportedResp bool
}
func (a *stubClusterAutoscaler) Name() string {
return "stub"
}
// Secrets returns a list of secrets to deploy together with the k8s cluster-autoscaler.
func (a *stubClusterAutoscaler) Secrets(instance, cloudServiceAccountURI string) (resources.Secrets, error) {
return resources.Secrets{}, nil
}
// Volumes returns a list of volumes to deploy together with the k8s cluster-autoscaler.
func (a *stubClusterAutoscaler) Volumes() []k8s.Volume {
return []k8s.Volume{}
}
// VolumeMounts returns a list of volume mounts to deploy together with the k8s cluster-autoscaler.
func (a *stubClusterAutoscaler) VolumeMounts() []k8s.VolumeMount {
return []k8s.VolumeMount{}
}
// Env returns a list of k8s environment key-value pairs to deploy together with the k8s cluster-autoscaler.
func (a *stubClusterAutoscaler) Env() []k8s.EnvVar {
return []k8s.EnvVar{}
}
func (a *stubClusterAutoscaler) Supported() bool {
return a.SupportedResp
}