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Signed-off-by: Darren Shepherd <[email protected]>
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| package cli | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "os" | ||
| "os/exec" | ||
|
|
||
| cli "github.com/acorn-io/runtime/pkg/cli/builder" | ||
| "github.com/spf13/cobra" | ||
| ) | ||
|
|
||
| func NewKubectl(c CommandContext) *cobra.Command { | ||
| cmd := cli.Command(&Kube{client: c.ClientFactory}, cobra.Command{ | ||
| Use: "kube [flags]", | ||
| Args: cobra.MinimumNArgs(1), | ||
| Hidden: true, | ||
| SilenceUsage: true, | ||
| Short: "Run command with KUBECONFIG env set to a generated kubeconfig of the current project", | ||
| Example: ` | ||
| acorn -j acorn kube k9s | ||
| `}) | ||
| cmd.Flags().SetInterspersed(false) | ||
| return cmd | ||
| } | ||
|
|
||
| type Kube struct { | ||
| client ClientFactory | ||
| } | ||
|
|
||
| func (s *Kube) Run(cmd *cobra.Command, args []string) error { | ||
| c, err := s.client.CreateDefault() | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| ctx, cancel := context.WithCancel(cmd.Context()) | ||
| defer cancel() | ||
|
|
||
| server, err := c.KubeProxyAddress(ctx) | ||
| if err != nil { | ||
| return err | ||
| } | ||
|
|
||
| f, err := os.CreateTemp("", "acorn-kube") | ||
| if err != nil { | ||
| return err | ||
| } | ||
| defer func() { | ||
| _ = os.Remove(f.Name()) | ||
| }() | ||
|
|
||
| _, err = f.Write([]byte(fmt.Sprintf(` | ||
| apiVersion: v1 | ||
| clusters: | ||
| - cluster: | ||
| server: "%s" | ||
| name: default | ||
| contexts: | ||
| - context: | ||
| cluster: default | ||
| user: default | ||
| name: default | ||
| current-context: default | ||
| kind: Config | ||
| preferences: {} | ||
| users: | ||
| - name: default | ||
| `, server))) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| if err := f.Close(); err != nil { | ||
| return err | ||
| } | ||
|
|
||
| k := exec.Command(args[0], args[1:]...) | ||
| k.Env = append(os.Environ(), fmt.Sprintf("KUBECONFIG=%s", f.Name())) | ||
| k.Stdin = os.Stdin | ||
| k.Stdout = os.Stdout | ||
| k.Stderr = os.Stderr | ||
| return k.Run() | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,92 @@ | ||
| package proxy | ||
|
|
||
| import ( | ||
| "net/http" | ||
| "net/url" | ||
| "strings" | ||
|
|
||
| "k8s.io/apimachinery/pkg/util/proxy" | ||
| "k8s.io/client-go/rest" | ||
| "k8s.io/client-go/transport" | ||
| ) | ||
|
|
||
| var ( | ||
| er = &errorResponder{} | ||
| ) | ||
|
|
||
| type errorResponder struct { | ||
| } | ||
|
|
||
| func (e *errorResponder) Error(w http.ResponseWriter, req *http.Request, err error) { | ||
| w.WriteHeader(http.StatusInternalServerError) | ||
| _, _ = w.Write([]byte(err.Error())) | ||
| } | ||
|
|
||
| // Mostly copied from "kubectl proxy" code | ||
| func Handler(cfg *rest.Config) (http.Handler, error) { | ||
| host := cfg.Host | ||
| if !strings.HasSuffix(host, "/") { | ||
| host = host + "/" | ||
| } | ||
| target, err := url.Parse(host) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| transport, err := rest.TransportFor(cfg) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| upgradeTransport, err := makeUpgradeTransport(cfg, transport) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| proxy := proxy.NewUpgradeAwareHandler(target, transport, false, false, er) | ||
| proxy.UpgradeTransport = upgradeTransport | ||
| proxy.UseRequestLocation = true | ||
| proxy.UseLocationHost = true | ||
|
|
||
| handler := http.Handler(proxy) | ||
|
|
||
| if len(target.Path) > 1 { | ||
| handler = prependPath(target.Path[:len(target.Path)-1], handler) | ||
| } | ||
|
|
||
| return proxyHeaders(handler), nil | ||
| } | ||
|
|
||
| func proxyHeaders(handler http.Handler) http.Handler { | ||
| return http.HandlerFunc(func(rw http.ResponseWriter, req *http.Request) { | ||
| req.Header.Del("Authorization") | ||
| if req.Header.Get("X-Forwarded-Proto") == "" && req.TLS != nil { | ||
| req.Header.Set("X-Forwarded-Proto", "https") | ||
| } | ||
| handler.ServeHTTP(rw, req) | ||
| }) | ||
| } | ||
|
|
||
| func prependPath(prefix string, h http.Handler) http.Handler { | ||
| return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) { | ||
| if len(req.URL.Path) > 1 { | ||
| req.URL.Path = prefix + req.URL.Path | ||
| } else { | ||
| req.URL.Path = prefix | ||
| } | ||
| h.ServeHTTP(w, req) | ||
| }) | ||
| } | ||
|
|
||
| func makeUpgradeTransport(config *rest.Config, rt http.RoundTripper) (proxy.UpgradeRequestRoundTripper, error) { | ||
| transportConfig, err := config.TransportConfig() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| upgrader, err := transport.HTTPWrappersForConfig(transportConfig, proxy.MirrorRequest) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
|
|
||
| return proxy.NewUpgradeRequestRoundTripper(rt, upgrader), nil | ||
| } |