woodpecker/pipeline/backend/kubernetes/utils.go

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// Copyright 2022 Woodpecker Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package kubernetes
import (
"errors"
"os"
"regexp"
"strings"
v1 "k8s.io/api/core/v1"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
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client_cmd "k8s.io/client-go/tools/clientcmd"
)
var (
dnsPattern = regexp.MustCompile(`^[a-z0-9]` + // must start with
`([-a-z0-9]*[a-z0-9])?` + // inside can als contain -
`(\.[a-z0-9]([-a-z0-9]*[a-z0-9])?)*$`, // allow the same pattern as before with dots in between but only one dot
)
dnsDisallowedCharacters = regexp.MustCompile(`[^-^.a-z0-9]+`)
ErrDNSPatternInvalid = errors.New("name is not a valid kubernetes DNS name")
)
func dnsName(i string) (string, error) {
res := strings.ToLower(strings.ReplaceAll(i, "_", "-"))
if found := dnsPattern.FindStringIndex(res); found == nil {
return "", ErrDNSPatternInvalid
}
return res, nil
}
func toDNSName(in string) (string, error) {
lower := strings.ToLower(in)
withoutUnderscores := strings.ReplaceAll(lower, "_", "-")
withoutSpaces := strings.ReplaceAll(withoutUnderscores, " ", "-")
almostDNS := dnsDisallowedCharacters.ReplaceAllString(withoutSpaces, "")
return dnsName(almostDNS)
}
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
}
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// getClientOutOfCluster returns a k8s client set to the request from outside of cluster.
func getClientOutOfCluster() (kubernetes.Interface, error) {
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kubeConfigPath := os.Getenv("KUBECONFIG") // cspell:words KUBECONFIG
if kubeConfigPath == "" {
kubeConfigPath = os.Getenv("HOME") + "/.kube/config"
}
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// use the current context in kube config
config, err := client_cmd.BuildConfigFromFlags("", kubeConfigPath)
if err != nil {
return nil, err
}
return kubernetes.NewForConfig(config)
}
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// getClient returns a k8s client set 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)
}
func newBool(val bool) *bool {
ptr := new(bool)
*ptr = val
return ptr
}
func newInt64(val int64) *int64 {
ptr := new(int64)
*ptr = val
return ptr
}