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100 lines
2.4 KiB
100 lines
2.4 KiB
package main
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import (
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"fmt"
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"net"
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"net/http"
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"os"
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"github.com/kubernetes/helm/cmd/tiller/environment"
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"github.com/spf13/cobra"
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"google.golang.org/grpc"
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)
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// rootServer is the root gRPC server.
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//
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// Each gRPC service registers itself to this server during init().
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var rootServer = grpc.NewServer()
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// env is the default environment.
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//
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// Any changes to env should be done before rootServer.Serve() is called.
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var env = environment.New()
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var addr = ":44134"
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var probe = ":44135"
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var namespace = ""
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const globalUsage = `The Kubernetes Helm server.
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Tiller is the server for Helm. It provides in-cluster resource management.
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By default, Tiller listens for gRPC connections on port 44134.
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`
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var rootCommand = &cobra.Command{
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Use: "tiller",
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Short: "The Kubernetes Helm server.",
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Long: globalUsage,
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Run: start,
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}
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func main() {
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pf := rootCommand.PersistentFlags()
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pf.StringVarP(&addr, "listen", "l", ":44134", "The address:port to listen on")
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pf.StringVarP(&namespace, "namespace", "n", "", "The namespace Tiller calls home")
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rootCommand.Execute()
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}
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func start(c *cobra.Command, args []string) {
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setNamespace()
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lstn, err := net.Listen("tcp", addr)
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if err != nil {
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fmt.Fprintf(os.Stderr, "Server died: %s\n", err)
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os.Exit(1)
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}
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fmt.Printf("Tiller is running on %s\n", addr)
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fmt.Printf("Tiller probes server is running on %s\n", probe)
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srvErrCh := make(chan error)
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probeErrCh := make(chan error)
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go func() {
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if err := rootServer.Serve(lstn); err != nil {
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srvErrCh <- err
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}
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}()
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go func() {
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mux := newProbesMux()
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if err := http.ListenAndServe(addr, mux); err != nil {
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probeErrCh <- err
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}
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}()
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select {
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case err := <-srvErrCh:
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fmt.Fprintf(os.Stderr, "Server died: %s\n", err)
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os.Exit(1)
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case err := <-probeErrCh:
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fmt.Fprintf(os.Stderr, "Probes server died: %s\n", err)
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}
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}
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// setNamespace sets the namespace.
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//
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// It checks for the --namespace flag first, then checks the environment
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// (set by Downward API), then goes to default.
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func setNamespace() {
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if len(namespace) != 0 {
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fmt.Printf("Setting namespace to %q\n", namespace)
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srv.env.Namespace = namespace
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} else if ns := os.Getenv("DEFAULT_NAMESPACE"); len(ns) != 0 {
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fmt.Printf("Inhereting namespace %q from Downward API\n", ns)
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srv.env.Namespace = ns
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} else {
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fmt.Printf("Using default namespace %q\n", environment.DefaultNamespace)
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srv.env.Namespace = environment.DefaultNamespace
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}
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}
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