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Move out VM generation

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This commit is contained in:
Mikhail Klementev 2018-07-15 19:08:28 +00:00
parent cb343c4506
commit 5f81e7ac3d
1 changed files with 35 additions and 31 deletions
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66
appvm.go
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@ -166,6 +166,39 @@ func prepareTemplates(appvmPath string) (err error) {
return return
} }
func generateVM(name string) (realpath, reginfo, qcow2 string, err error) {
stdout, stderr, ret, err := system.System("nix-build", "<nixpkgs/nixos>", "-A", "config.system.build.vm",
"-I", "nixos-config=nix/"+name+".nix", "-I", ".")
if err != nil {
log.Println(err, stdout, stderr, ret)
return
}
realpath, err = filepath.EvalSymlinks("result/system")
if err != nil {
return
}
// TODO: Use go regex
reginfo, _, _, err = system.System("sh", "-c", "cat result/bin/run-nixos-vm | grep -o 'regInfo=.*/registration'")
if err != nil {
return
}
syscall.Unlink("result")
qcow2 = "/tmp/.appvm.fake.qcow2"
if _, err = os.Stat(qcow2); os.IsNotExist(err) {
system.System("qemu-img", "create", "-f", "qcow2", qcow2, "512M")
err = os.Chmod(qcow2, 0400) // qemu run with -snapshot, we only need it for create /dev/vda
if err != nil {
return
}
}
return
}
func start(l *libvirt.Libvirt, name string) { func start(l *libvirt.Libvirt, name string) {
// Currently binary-only installation is not supported, because we need *.nix configurations // Currently binary-only installation is not supported, because we need *.nix configurations
gopath := os.Getenv("GOPATH") gopath := os.Getenv("GOPATH")
@ -176,48 +209,19 @@ func start(l *libvirt.Libvirt, name string) {
} }
// Copy templates // Copy templates
err := prepareTemplates(name) err = prepareTemplates(name)
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)
} }
stdout, stderr, ret, err := system.System("nix-build", "<nixpkgs/nixos>", "-A", "config.system.build.vm", realpath, reginfo, qcow2, err := generateVM(name)
"-I", "nixos-config=nix/"+name+".nix", "-I", ".")
if err != nil {
log.Fatalln(err, stdout, stderr, ret)
}
realpath, err := filepath.EvalSymlinks("result/system")
if err != nil { if err != nil {
log.Fatal(err) log.Fatal(err)
} }
// TODO: Use go regex
reginfo, _, _, err := system.System("sh", "-c", "cat result/bin/run-nixos-vm | grep -o 'regInfo=.*/registration'")
if err != nil {
log.Fatal(err)
}
syscall.Unlink("result")
qcow2 := "/tmp/.appvm.fake.qcow2"
if _, err := os.Stat(qcow2); os.IsNotExist(err) {
system.System("qemu-img", "create", "-f", "qcow2", qcow2, "512M")
err := os.Chmod(qcow2, 0400) // qemu run with -snapshot, we only need it for create /dev/vda
if err != nil {
log.Fatal(err)
}
}
sharedDir := fmt.Sprintf(os.Getenv("HOME") + "/appvm/" + name) sharedDir := fmt.Sprintf(os.Getenv("HOME") + "/appvm/" + name)
os.MkdirAll(sharedDir, 0700) os.MkdirAll(sharedDir, 0700)
// TODO: Search go libraries for manipulate ACL
_, _, _, err = system.System("setfacl", "-R", "-m", "u:qemu:rwx", os.Getenv("HOME")+"/appvm/")
if err != nil {
log.Fatal(err)
}
xml := generateXML(name, realpath, reginfo, qcow2, sharedDir) xml := generateXML(name, realpath, reginfo, qcow2, sharedDir)
_, err = l.DomainCreateXML(xml, libvirt.DomainStartValidate) _, err = l.DomainCreateXML(xml, libvirt.DomainStartValidate)
if err != nil { if err != nil {