Lightweight Kubernetes
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package cloudprovider
import (
"context"
"fmt"
"github.com/sirupsen/logrus"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
cloudprovider "k8s.io/cloud-provider"
)
const (
InternalIPLabel = "k3s.io/internal-ip"
ExternalIPLabel = "k3s.io/external-ip"
HostnameLabel = "k3s.io/hostname"
)
func (k *k3s) AddSSHKeyToAllInstances(ctx context.Context, user string, keyData []byte) error {
return cloudprovider.NotImplemented
}
func (k *k3s) CurrentNodeName(ctx context.Context, hostname string) (types.NodeName, error) {
return types.NodeName(hostname), nil
}
func (k *k3s) InstanceExistsByProviderID(ctx context.Context, providerID string) (bool, error) {
return true, nil
}
func (k *k3s) InstanceID(ctx context.Context, nodeName types.NodeName) (string, error) {
_, err := k.NodeCache.Get(string(nodeName))
if err != nil {
return "", fmt.Errorf("Failed to find node %s: %v", nodeName, err)
}
return string(nodeName), nil
}
func (k *k3s) InstanceShutdownByProviderID(ctx context.Context, providerID string) (bool, error) {
return true, cloudprovider.NotImplemented
}
func (k *k3s) InstanceType(ctx context.Context, name types.NodeName) (string, error) {
_, err := k.InstanceID(ctx, name)
if err != nil {
return "", err
}
return "k3s", nil
}
func (k *k3s) InstanceTypeByProviderID(ctx context.Context, providerID string) (string, error) {
return "", cloudprovider.NotImplemented
}
func (k *k3s) NodeAddresses(ctx context.Context, name types.NodeName) ([]corev1.NodeAddress, error) {
addresses := []corev1.NodeAddress{}
node, err := k.NodeCache.Get(string(name))
if err != nil {
return nil, fmt.Errorf("Failed to find node %s: %v", name, err)
}
// check internal address
if node.Labels[InternalIPLabel] != "" {
addresses = append(addresses, corev1.NodeAddress{Type: corev1.NodeInternalIP, Address: node.Labels[InternalIPLabel]})
} else {
logrus.Infof("couldn't find node internal ip label on node %s", name)
}
// check external address
if node.Labels[ExternalIPLabel] != "" {
addresses = append(addresses, corev1.NodeAddress{Type: corev1.NodeExternalIP, Address: node.Labels[ExternalIPLabel]})
}
// check hostname
if node.Labels[HostnameLabel] != "" {
addresses = append(addresses, corev1.NodeAddress{Type: corev1.NodeHostName, Address: node.Labels[HostnameLabel]})
} else {
logrus.Infof("couldn't find node hostname label on node %s", name)
}
return addresses, nil
}
func (k *k3s) NodeAddressesByProviderID(ctx context.Context, providerID string) ([]corev1.NodeAddress, error) {
return nil, cloudprovider.NotImplemented
}