mirror of
https://github.com/hanzoai/visor.git
synced 2026-09-24 17:04:14 +00:00
Etienne PerotandgVisor bot
a6f64111fc
This adds a command-line tool named `gvisor_k8s_tool` that allows running the
`runsc` installer image as a DaemonSet in a Kubernetes cluster, either through
GKE or through `kubectl` configuration.
Example:
```shell
# Install using default kubectl context:
$ ./gvisor_k8s_tool install --cluster=kube: --image=my-runsc-installer
# Install using custom kubectl config and context:
$ KUBECONFIG=/tmp/myconfig ./gvisor_k8s_tool \
install --cluster=kube:mycontext --image=my-runsc-installer
# Install in a GKE cluster:
$ ./gvisor_k8s_tool install \
--cluster=gke:projects/myproject/locations/us-central1-a/clusters/mylittlecluster \
--image=my-runsc-installer
```
PiperOrigin-RevId: 557945316
64 lines
2.1 KiB
Go
64 lines
2.1 KiB
Go
// Copyright 2023 The gVisor 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 kubectl contains functions to interact with Kubernetes clusters
|
|
// controlled using kubectl configurations.
|
|
package kubectl
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"os/user"
|
|
"path"
|
|
|
|
"gvisor.dev/gvisor/pkg/log"
|
|
"gvisor.dev/gvisor/tools/gvisor_k8s_tool/cluster"
|
|
"k8s.io/client-go/tools/clientcmd"
|
|
)
|
|
|
|
// getKubeConfigPath returns the path to the kubectl config.
|
|
func getKubeConfigPath() (string, error) {
|
|
if envPath, ok := os.LookupEnv("KUBECONFIG"); ok {
|
|
return envPath, nil
|
|
}
|
|
me, err := user.Current()
|
|
if err != nil {
|
|
return "", fmt.Errorf("cannot get current user information: %w", err)
|
|
}
|
|
return path.Join(me.HomeDir, ".kube/config"), nil
|
|
}
|
|
|
|
// NewCluster creates a new cluster client for the given context name and
|
|
// using the kubectl config defined in the KUBECONFIG environment variable.
|
|
// If the context name is empty, the default ("current") context is used.
|
|
func NewCluster(contextName string) (*cluster.Cluster, error) {
|
|
cfgPath, err := getKubeConfigPath()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
cfg, err := clientcmd.LoadFromFile(cfgPath)
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot load kubectl config at %q: %w", cfgPath, err)
|
|
}
|
|
if contextName == "" {
|
|
contextName = cfg.CurrentContext
|
|
log.Infof("Using default kubectl context: %q", contextName)
|
|
}
|
|
restClient, err := clientcmd.NewNonInteractiveClientConfig(*cfg, contextName, nil, clientcmd.NewDefaultClientConfigLoadingRules()).ClientConfig()
|
|
if err != nil {
|
|
return nil, fmt.Errorf("cannot create REST client: %w", err)
|
|
}
|
|
return cluster.New(restClient)
|
|
}
|