/
clientcmd.go
118 lines (102 loc) · 2.95 KB
/
clientcmd.go
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package clientcmd
import (
"bufio"
"context"
"io"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/client-go/kubernetes/scheme"
corev1client "k8s.io/client-go/kubernetes/typed/core/v1"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/clientcmd"
"k8s.io/client-go/tools/remotecommand"
)
type Client struct {
client corev1client.CoreV1Interface
restconfig *restclient.Config
}
func NewClient() (*Client, error) {
// Instantiate loader for kubeconfig file.
kubeconfig := clientcmd.NewNonInteractiveDeferredLoadingClientConfig(
clientcmd.NewDefaultClientConfigLoadingRules(),
&clientcmd.ConfigOverrides{
Timeout: "10s",
},
)
// Get a rest.Config from the kubeconfig file. This will be passed into all
// the client objects we create.
restconfig, err := kubeconfig.ClientConfig()
if err != nil {
return nil, err
}
// Create a Kubernetes core/v1 client.
cl, err := corev1client.NewForConfig(restconfig)
if err != nil {
return nil, err
}
return &Client{
client: cl,
restconfig: restconfig,
}, nil
}
func (c *Client) PodLogs(namespace, podName string, opts *corev1.PodLogOptions) ([]string, error) {
logs, err := c.client.Pods(namespace).GetLogs(podName, opts).Stream(context.TODO())
if err != nil {
return nil, errors.Wrap(err, "get pod logs stream")
}
defer logs.Close()
logArr := make([]string, 0)
sc := bufio.NewScanner(logs)
for sc.Scan() {
logArr = append(logArr, sc.Text())
}
return logArr, errors.Wrap(sc.Err(), "reading logs stream")
}
func (c *Client) IsPodRunning(namespace, podName string) (bool, error) {
pod, err := c.client.Pods(namespace).Get(context.TODO(), podName, metav1.GetOptions{})
if err != nil {
return false, err
}
if pod.Status.Phase != corev1.PodRunning {
return false, nil
}
for _, v := range pod.Status.Conditions {
if v.Type == corev1.ContainersReady && v.Status == corev1.ConditionTrue {
return true, nil
}
}
return false, nil
}
func (c *Client) Exec(pod *corev1.Pod, containerName string, command []string, stdin io.Reader, stdout, stderr io.Writer, tty bool) error {
// Prepare the API URL used to execute another process within the Pod. In
// this case, we'll run a remote shell.
req := c.client.RESTClient().
Post().
Namespace(pod.Namespace).
Resource("pods").
Name(pod.Name).
SubResource("exec").
VersionedParams(&corev1.PodExecOptions{
Container: containerName,
Command: command,
Stdin: stdin != nil,
Stdout: stdout != nil,
Stderr: stderr != nil,
TTY: tty,
}, scheme.ParameterCodec)
exec, err := remotecommand.NewSPDYExecutor(c.restconfig, "POST", req.URL())
if err != nil {
return err
}
// Connect this process' std{in,out,err} to the remote shell process.
return exec.Stream(remotecommand.StreamOptions{
Stdin: stdin,
Stdout: stdout,
Stderr: stderr,
Tty: tty,
})
}
func (c *Client) REST() restclient.Interface {
return c.client.RESTClient()
}