Function hypervChecks

src/cmd/linuxkit/run_hyperv.go:191–229

Perform some sanity checks, and error if failing

()

// Perform some sanity checks, and error if failing
func hypervChecks() {
	powershell, _ = exec.LookPath("powershell.exe")
	if powershell == "" {
		log.Fatalf("Could not find powershell executable")
	}

	hvAdmin := false
	admin := false

	out, _, err := poshCmd(`@([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole("Hyper-V Administrators")`)
	if err != nil {
		log.Debugf("Check for Hyper-V Admin failed: %v", err)
	}
	res := splitLines(out)
	if res[0] == "True" {
		hvAdmin = true
	}

	out, _, err = poshCmd(`@([Security.Principal.WindowsPrincipal][Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")`)
	if err != nil {
		log.Debugf("Check for Admin failed: %v", err)
	}
	res = splitLines(out)
	if res[0] == "True" {
		admin = true
	}
	if !hvAdmin && !admin {
		log.Fatal("Must be run from an elevated prompt or user must be in the Hyper-V Administrator role")
	}

	out, _, err = poshCmd("@(Get-Command Get-VM).ModuleName")
	if err != nil {
		log.Fatalf("Check for Hyper-V powershell modules failed: %v", err)
	}
	res = splitLines(out)
	if res[0] != "Hyper-V" {
		log.Fatal("The Hyper-V powershell module does not seem to be installed")
	}
}

// Find a Hyper-V switch. Either check that the supplied switch exists
// or find the first external switch.