summaryrefslogtreecommitdiff
path: root/pkg/machine
diff options
context:
space:
mode:
authorBrent Baude <bbaude@redhat.com>2022-03-28 13:30:48 -0500
committerBrent Baude <bbaude@redhat.com>2022-03-28 14:54:19 -0500
commit6e0e1cbddd5e1c5dff51215ad2b41a99d890fad8 (patch)
treee862c158d4bf7f67efeedf841466a4951fc2a7db /pkg/machine
parent9cfa9695a0e0e9e5d358f789c4d450d1388589b3 (diff)
downloadpodman-6e0e1cbddd5e1c5dff51215ad2b41a99d890fad8.tar.gz
podman-6e0e1cbddd5e1c5dff51215ad2b41a99d890fad8.tar.bz2
podman-6e0e1cbddd5e1c5dff51215ad2b41a99d890fad8.zip
Migrate machine configs
If podman detects a Machinev1 config, it will automatically migrate it to the new format. Signed-off-by: Brent Baude <bbaude@redhat.com> [NO NEW TESTS NEEDED]
Diffstat (limited to 'pkg/machine')
-rw-r--r--pkg/machine/qemu/config.go11
-rw-r--r--pkg/machine/qemu/machine.go87
2 files changed, 94 insertions, 4 deletions
diff --git a/pkg/machine/qemu/config.go b/pkg/machine/qemu/config.go
index 408b33a33..05a1d74d3 100644
--- a/pkg/machine/qemu/config.go
+++ b/pkg/machine/qemu/config.go
@@ -49,7 +49,7 @@ type MachineVMV1 struct {
// SSH port for user networking
Port int
// QMPMonitor is the qemu monitor object for sending commands
- QMPMonitor Monitor
+ QMPMonitor Monitorv1
// RemoteUsername of the vm user
RemoteUsername string
// Whether this machine should run in a rootful or rootless manner
@@ -134,6 +134,15 @@ type Mount struct {
ReadOnly bool
}
+type Monitorv1 struct {
+ // Address portion of the qmp monitor (/tmp/tmp.sock)
+ Address string
+ // Network portion of the qmp monitor (unix)
+ Network string
+ // Timeout in seconds for qmp monitor transactions
+ Timeout time.Duration
+}
+
type Monitor struct {
// Address portion of the qmp monitor (/tmp/tmp.sock)
Address MachineFile
diff --git a/pkg/machine/qemu/machine.go b/pkg/machine/qemu/machine.go
index ac8e7d75c..07155bbcf 100644
--- a/pkg/machine/qemu/machine.go
+++ b/pkg/machine/qemu/machine.go
@@ -131,6 +131,75 @@ func (p *Provider) NewMachine(opts machine.InitOptions) (machine.VM, error) {
return vm, nil
}
+// migrateVM takes the old configuration structure and migrates it
+// to the new structure and writes it to the filesystem
+func migrateVM(configPath string, config []byte, vm *MachineVM) error {
+ fmt.Printf("Migrating machine %q\n", vm.Name)
+ var old MachineVMV1
+ err := json.Unmarshal(config, &old)
+ if err != nil {
+ return err
+ }
+ // Looks like we loaded the older structure; now we need to migrate
+ // from the old structure to the new structure
+ _, pidFile, err := vm.getSocketandPid()
+ if err != nil {
+ return err
+ }
+
+ pidFilePath := MachineFile{Path: pidFile}
+ qmpMonitor := Monitor{
+ Address: MachineFile{Path: old.QMPMonitor.Address},
+ Network: old.QMPMonitor.Network,
+ Timeout: old.QMPMonitor.Timeout,
+ }
+ socketPath, err := getRuntimeDir()
+ if err != nil {
+ return err
+ }
+ virtualSocketPath := filepath.Join(socketPath, "podman", vm.Name+"_ready.sock")
+ readySocket := MachineFile{Path: virtualSocketPath}
+
+ vm.HostUser = HostUser{}
+ vm.ImageConfig = ImageConfig{}
+ vm.ResourceConfig = ResourceConfig{}
+ vm.SSHConfig = SSHConfig{}
+
+ vm.CPUs = old.CPUs
+ vm.CmdLine = old.CmdLine
+ vm.DiskSize = old.DiskSize
+ vm.IdentityPath = old.IdentityPath
+ vm.IgnitionFilePath = old.IgnitionFilePath
+ vm.ImagePath = old.ImagePath
+ vm.ImageStream = old.ImageStream
+ vm.Memory = old.Memory
+ vm.Mounts = old.Mounts
+ vm.Name = old.Name
+ vm.PidFilePath = pidFilePath
+ vm.Port = old.Port
+ vm.QMPMonitor = qmpMonitor
+ vm.ReadySocket = readySocket
+ vm.RemoteUsername = old.RemoteUsername
+ vm.Rootful = old.Rootful
+ vm.UID = old.UID
+
+ // Backup the original config file
+ if err := os.Rename(configPath, configPath+".orig"); err != nil {
+ return err
+ }
+ // Write the config file
+ if err := vm.writeConfig(); err != nil {
+ // If the config file fails to be written, put the origina
+ // config file back before erroring
+ if renameError := os.Rename(configPath+".orig", configPath); renameError != nil {
+ logrus.Warn(renameError)
+ }
+ return err
+ }
+ // Remove the backup file
+ return os.Remove(configPath + ".orig")
+}
+
// LoadByName reads a json file that describes a known qemu vm
// and returns a vm instance
func (p *Provider) LoadVMByName(name string) (machine.VM, error) {
@@ -140,7 +209,8 @@ func (p *Provider) LoadVMByName(name string) (machine.VM, error) {
if err != nil {
return nil, err
}
- b, err := ioutil.ReadFile(filepath.Join(vmConfigDir, name+".json"))
+ path := filepath.Join(vmConfigDir, name+".json")
+ b, err := ioutil.ReadFile(path)
if os.IsNotExist(err) {
return nil, errors.Wrap(machine.ErrNoSuchVM, name)
}
@@ -148,7 +218,13 @@ func (p *Provider) LoadVMByName(name string) (machine.VM, error) {
return nil, err
}
err = json.Unmarshal(b, vm)
-
+ if err != nil {
+ migrateErr := migrateVM(path, b, vm)
+ if migrateErr != nil {
+ return nil, migrateErr
+ }
+ err = migrateErr
+ }
// It is here for providing the ability to propagate
// proxy settings (e.g. HTTP_PROXY and others) on a start
// and avoid a need of re-creating/re-initiating a VM
@@ -911,7 +987,12 @@ func GetVMInfos() ([]*machine.ListResponse, error) {
}
err = json.Unmarshal(b, vm)
if err != nil {
- return err
+ // Checking if the file did not unmarshal because it is using
+ // the deprecated config file format.
+ migrateErr := migrateVM(fullPath, b, vm)
+ if migrateErr != nil {
+ return migrateErr
+ }
}
listEntry := new(machine.ListResponse)