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env.go
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env.go
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package k8s
import (
"strings"
"github.com/pkg/errors"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/clientcmd/api"
)
type Env string
const (
EnvUnknown Env = "unknown"
EnvGKE Env = "gke"
EnvMinikube Env = "minikube"
EnvDockerDesktop Env = "docker-for-desktop"
EnvMicroK8s Env = "microk8s"
EnvKIND Env = "kind"
EnvNone Env = "none" // k8s not running (not neces. a problem, e.g. if using Tilt x Docker Compose)
)
func (e Env) IsLocalCluster() bool {
return e == EnvMinikube || e == EnvDockerDesktop || e == EnvMicroK8s
}
func ProvideEnv(kubeConfig *api.Config) Env {
return EnvFromConfig(kubeConfig)
}
func ProvideKubeContext(config *api.Config) (KubeContext, error) {
return KubeContext(config.CurrentContext), nil
}
func ProvideKubeConfig(clientLoader clientcmd.ClientConfig) (*api.Config, error) {
access := clientLoader.ConfigAccess()
config, err := access.GetStartingConfig()
if err != nil {
return nil, errors.Wrap(err, "Loading Kubernetes current-context")
}
return config, nil
}
func EnvFromString(s string) Env {
if Env(s) == EnvMinikube {
return EnvMinikube
} else if Env(s) == EnvDockerDesktop || s == "docker-desktop" {
return EnvDockerDesktop
} else if Env(s) == EnvMicroK8s {
return EnvMicroK8s
} else if strings.HasPrefix(s, "kubernetes-admin@kind") {
return EnvKIND
} else if Env(s) == EnvNone {
return EnvNone
} else if strings.HasPrefix(s, string(EnvGKE)) {
// GKE context strings look like:
// gke_blorg-dev_us-central1-b_blorg
return EnvGKE
}
return EnvUnknown
}
func EnvFromConfig(config *api.Config) Env {
n := config.CurrentContext
c, ok := config.Contexts[n]
if !ok {
return EnvUnknown
}
cn := c.Cluster
if Env(cn) == EnvMinikube {
return EnvMinikube
} else if cn == "docker-for-desktop-cluster" || cn == "docker-desktop" {
return EnvDockerDesktop
} else if strings.HasPrefix(cn, string(EnvGKE)) {
// GKE cluster strings look like:
// gke_blorg-dev_us-central1-b_blorg
return EnvGKE
} else if Env(cn) == EnvKIND {
return EnvKIND
} else if cn == "microk8s-cluster" {
return EnvMicroK8s
}
return EnvUnknown
}