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https://github.com/linuxkit/linuxkit.git
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79ea045be8
Separating command line option parsing from executing hyperkit makes the code awkward with many parameters passed between functions. Having everything in one function makes the code simpler. Signed-off-by: Rolf Neugebauer <rolf.neugebauer@docker.com>
64 lines
1.6 KiB
Go
64 lines
1.6 KiB
Go
package main
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import (
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"flag"
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"fmt"
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"io/ioutil"
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"os"
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log "github.com/Sirupsen/logrus"
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"github.com/docker/hyperkit/go"
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)
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// Process the run arguments and execute run
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func runHyperKit(args []string) {
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hyperkitCmd := flag.NewFlagSet("hyperkit", flag.ExitOnError)
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hyperkitCmd.Usage = func() {
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fmt.Printf("USAGE: %s run hyperkit [options] prefix\n\n", os.Args[0])
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fmt.Printf("'prefix' specifies the path to the VM image.\n")
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fmt.Printf("\n")
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fmt.Printf("Options:\n")
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hyperkitCmd.PrintDefaults()
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}
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hyperkitPath := hyperkitCmd.String("hyperkit", "", "Path to hyperkit binary (if not in default location)")
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cpus := hyperkitCmd.Int("cpus", 1, "Number of CPUs")
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mem := hyperkitCmd.Int("mem", 1024, "Amount of memory in MB")
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diskSz := hyperkitCmd.Int("disk-size", 0, "Size of Disk in MB")
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disk := hyperkitCmd.String("disk", "", "Path to disk image to used")
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hyperkitCmd.Parse(args)
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remArgs := hyperkitCmd.Args()
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if len(remArgs) == 0 {
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fmt.Println("Please specify the prefix to the image to boot\n")
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hyperkitCmd.Usage()
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os.Exit(1)
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}
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prefix := remArgs[0]
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// Run
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cmdline, err := ioutil.ReadFile(prefix + "-cmdline")
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if err != nil {
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log.Fatalf("Cannot open cmdline file: %v", err)
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}
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if *diskSz != 0 && *disk == "" {
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*disk = prefix + "-disk.img"
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}
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h, err := hyperkit.New(*hyperkitPath, "", "auto", *disk)
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if err != nil {
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log.Fatalln("Error creating hyperkit: ", err)
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}
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h.Kernel = prefix + "-bzImage"
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h.Initrd = prefix + "-initrd.img"
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h.CPUs = *cpus
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h.Memory = *mem
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h.DiskSize = *diskSz
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err = h.Run(string(cmdline))
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if err != nil {
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log.Fatalf("Cannot run hyperkit: %v", err)
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}
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}
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