woodpecker/pipeline/backend/kubernetes/utils.go
Neil Hanlon a95a5b43bf
fix(backend/kubernetes): Ensure valid naming of name field (#1661)
- Kubernetes v1.26 on VKE causes error when creating persistent volume
claim because of uppercase characters in name field

This patch is trivial just in order to get it working - happy to
implement differently.

The error in question:

```
The PersistentVolumeClaim "wp-01G1131R63FWBSPMA4ZAZTKLE-0-clone-0" is invalid: metadata.name: Invalid value: "wp-01G1131R63FWBSPMA4ZAZTKLE-0-clone-0": a lowercase RFC 1123 subdomain must consist of lower case alphanumeric characters, '-' or '.', and must start and end with an alphanumeric character (e.g. 'example.com', regex used for validation is '[a-z0-9]([-a-z0-9]*[a-z0-9])?(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*')
```
2023-03-21 20:00:45 +01:00

66 lines
1.5 KiB
Go

package kubernetes
import (
"errors"
"os"
"regexp"
"strings"
v1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
)
var (
dnsPattern = regexp.MustCompile(`^[a-z0-9]([-a-z0-9]*[a-z0-9])?(\\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$`)
ErrDNSPatternInvalid = errors.New("name is not a valid kubernetes DNS name")
)
func dnsName(i string) (string, error) {
res := strings.Replace(i, "_", "-", -1)
if found := dnsPattern.FindStringIndex(res); found == nil {
return "", ErrDNSPatternInvalid
}
return res, nil
}
func isImagePullBackOffState(pod *v1.Pod) bool {
for _, containerState := range pod.Status.ContainerStatuses {
if containerState.State.Waiting != nil {
if containerState.State.Waiting.Reason == "ImagePullBackOff" {
return true
}
}
}
return false
}
// getClientOutOfCluster returns a k8s clientset to the request from outside of cluster
func getClientOutOfCluster() (kubernetes.Interface, error) {
kubeconfigPath := os.Getenv("KUBECONFIG")
if kubeconfigPath == "" {
kubeconfigPath = os.Getenv("HOME") + "/.kube/config"
}
// use the current context in kubeconfig
config, err := clientcmd.BuildConfigFromFlags("", kubeconfigPath)
if err != nil {
return nil, err
}
return kubernetes.NewForConfig(config)
}
// getClient returns a k8s clientset to the request from inside of cluster
func getClientInsideOfCluster() (kubernetes.Interface, error) {
config, err := rest.InClusterConfig()
if err != nil {
return nil, err
}
return kubernetes.NewForConfig(config)
}