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kubernetes.go
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kubernetes.go
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package platform
import (
"errors"
"fmt"
"os"
"path/filepath"
"time"
"github.com/AlexsJones/kubebuilder/src/data"
"github.com/AlexsJones/kubebuilder/src/log"
"k8s.io/api/core/v1"
beta "k8s.io/api/extensions/v1beta1"
meta "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime/serializer"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/kubernetes/scheme"
clientsetscheme "k8s.io/client-go/kubernetes/scheme"
_ "k8s.io/client-go/plugin/pkg/client/auth/gcp"
"k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
//This is required for gcp auth provider scope
)
//Kubernetes ...
type Kubernetes struct {
clientset *kubernetes.Clientset
config *rest.Config
}
//NewKubernetes object
func NewKubernetes(masterURL string, inclusterConfig bool) (*Kubernetes, error) {
//InCluster...
var config *rest.Config
var err error
if inclusterConfig {
logger.GetInstance().Log("Using in cluster configuration")
config, err = rest.InClusterConfig()
if err != nil {
return nil, err
}
} else {
logger.GetInstance().Log("Using out of cluster configuration")
kubeconfig := filepath.Join(func() string {
if h := os.Getenv("HOME"); h != "" {
return h
}
return os.Getenv("USERPROFILE")
}(), ".kube", "config")
// use the current context in kubeconfig
config, err = clientcmd.BuildConfigFromFlags(masterURL, kubeconfig)
if err != nil {
panic(err.Error())
}
}
// creates the clientset
clientset, err := kubernetes.NewForConfig(config)
if err != nil {
return nil, err
}
return &Kubernetes{clientset: clientset, config: config}, nil
}
//ValidateService from deserialisation of YAML
func (k *Kubernetes) ValidateService(build *data.BuildDefinition) (bool, error) {
//TODO: NEEDS some proper checks here not just deserialisation
logger.GetInstance().Log("Attempting deserialisation of YAML")
d := scheme.Codecs.UniversalDeserializer()
_, _, err := d.Decode([]byte(build.Kubernetes.Service), nil, nil)
if err != nil {
logger.GetInstance().Log(fmt.Sprintf("could not decode yaml: %s\n%s", build.Kubernetes.Service, err))
return false, err
}
logger.GetInstance().Log("Service YAML okay")
return true, nil
}
//ValidateDeployment from deserialisation of YAML
func (k *Kubernetes) ValidateDeployment(build *data.BuildDefinition) (bool, error) {
//TODO: NEEDS some proper checks here not just deserialisation
logger.GetInstance().Log("Attempting deserialisation of YAML")
d := scheme.Codecs.UniversalDeserializer()
_, _, err := d.Decode([]byte(build.Kubernetes.Deployment), nil, nil)
if err != nil {
logger.GetInstance().Log(fmt.Sprintf("could not decode yaml: %s\n%s", build.Kubernetes.Deployment, err))
return false, err
}
logger.GetInstance().Log("Deployment YAML okay")
return true, nil
}
//ValidateIngress from deserialisation of YAML
func (k *Kubernetes) ValidateIngress(build *data.BuildDefinition) (bool, error) {
//TODO: NEEDS some proper checks here not just deserialisation
logger.GetInstance().Log("Attempting deserialisation of YAML")
d := scheme.Codecs.UniversalDeserializer()
_, _, err := d.Decode([]byte(build.Kubernetes.Ingress), nil, nil)
if err != nil {
logger.GetInstance().Log(fmt.Sprintf("could not decode yaml: %s\n%s", build.Kubernetes.Ingress, err))
return false, err
}
logger.GetInstance().Log("Ingress YAML okay")
return true, nil
}
//CreateNamespace within kubernetes
func (k *Kubernetes) CreateNamespace(namespace string) (*v1.Namespace, error) {
if ns, err := k.GetNamespace(namespace); err == nil {
logger.GetInstance().Log("Found existing namespace")
return ns, err
}
ns := &v1.Namespace{}
ns.SetName(namespace)
ns, err := k.clientset.CoreV1().Namespaces().Create(ns)
return ns, err
}
//GetNamespace within kubernetes
func (k *Kubernetes) GetNamespace(namespace string) (*v1.Namespace, error) {
ns, err := k.clientset.CoreV1().Namespaces().Get(namespace, meta.GetOptions{})
return ns, err
}
//CreateDeployment ...
func (k *Kubernetes) CreateDeployment(build *data.BuildDefinition) (*beta.Deployment, error) {
deserializer := serializer.NewCodecFactory(clientsetscheme.Scheme).UniversalDeserializer()
obj, _, err := deserializer.Decode([]byte(build.Kubernetes.Deployment), nil, nil)
if err != nil {
logger.GetInstance().Log(fmt.Sprintf("could not decode yaml: %s\n%s", build.Kubernetes.Deployment, err))
return nil, err
}
deploymentClient := k.clientset.ExtensionsV1beta1().Deployments(build.Kubernetes.Namespace)
deployment, err := deploymentClient.Create(obj.(*beta.Deployment))
if err != nil {
logger.GetInstance().Log("Trying to update existing deployment....")
deployment, err = deploymentClient.Update(obj.(*beta.Deployment))
if err == nil {
logger.GetInstance().Log("Updated existing deployment")
return deployment, nil
}
return nil, err
}
return deployment, nil
}
//CreateService ...
func (k *Kubernetes) CreateService(build *data.BuildDefinition) (*v1.Service, error) {
deserializer := serializer.NewCodecFactory(clientsetscheme.Scheme).UniversalDeserializer()
obj, _, err := deserializer.Decode([]byte(build.Kubernetes.Service), nil, nil)
if err != nil {
logger.GetInstance().Log(fmt.Sprintf("could not decode yaml: %s\n%s", build.Kubernetes.Service, err))
return nil, err
}
serviceClient := k.clientset.CoreV1().Services(build.Kubernetes.Namespace)
service, err := serviceClient.Create(obj.(*v1.Service))
if err != nil {
logger.GetInstance().Log("Trying to update existing service....")
service, err = serviceClient.Update(obj.(*v1.Service))
if err == nil {
logger.GetInstance().Log("Updated existing service")
return service, nil
}
return nil, err
}
return service, nil
}
//CreateIngress ...
func (k *Kubernetes) CreateIngress(build *data.BuildDefinition) (*beta.Ingress, error) {
deserializer := serializer.NewCodecFactory(clientsetscheme.Scheme).UniversalDeserializer()
obj, _, err := deserializer.Decode([]byte(build.Kubernetes.Ingress), nil, nil)
if err != nil {
logger.GetInstance().Log(fmt.Sprintf("could not decode yaml: %s\n%s", build.Kubernetes.Ingress, err))
return nil, err
}
ingressClient := k.clientset.ExtensionsV1beta1().Ingresses(build.Kubernetes.Namespace)
ingress, err := ingressClient.Create(obj.(*beta.Ingress))
if err != nil {
logger.GetInstance().Log("Trying to update existing ingress....")
ingress, err = ingressClient.Update(obj.(*beta.Ingress))
if err == nil {
logger.GetInstance().Log("Updated existing ingess")
return ingress, nil
}
return nil, err
}
return ingress, nil
}
//GetIngressLoadBalancerIPAddress ...
func (k *Kubernetes) GetIngressLoadBalancerIPAddress(ingress *beta.Ingress, t time.Duration) (string, error) {
start := time.Now()
for {
elapsed := time.Since(start)
if elapsed > t {
return "", errors.New("Too much time has elapsed waiting for load balancer")
}
if len(ingress.Status.LoadBalancer.Ingress) > 0 {
if ingress.Status.LoadBalancer.Ingress[0].IP != "" || len(ingress.Status.LoadBalancer.Ingress[0].IP) > 0 {
return ingress.Status.LoadBalancer.Ingress[0].IP, nil
}
}
time.Sleep(time.Second)
logger.GetInstance().Log("Waiting...")
}
}