127 lines
3.0 KiB
Go
127 lines
3.0 KiB
Go
//go:build darwin
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package vfkit
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import (
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"bytes"
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"encoding/json"
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"errors"
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"fmt"
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"io"
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"net/http"
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"time"
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"github.com/containers/podman/v4/pkg/machine/define"
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"github.com/crc-org/vfkit/pkg/config"
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rest "github.com/crc-org/vfkit/pkg/rest/define"
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"github.com/sirupsen/logrus"
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"golang.org/x/sys/unix"
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)
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const (
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inspect = "/vm/inspect"
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state = "/vm/state"
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version = "/version"
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)
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func (vf *VfkitHelper) get(endpoint string, payload io.Reader) (*http.Response, error) {
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client := &http.Client{}
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req, err := http.NewRequest(http.MethodGet, endpoint, payload)
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if err != nil {
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return nil, err
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}
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return client.Do(req)
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}
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func (vf *VfkitHelper) post(endpoint string, payload io.Reader) (*http.Response, error) {
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client := &http.Client{}
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req, err := http.NewRequest(http.MethodPost, endpoint, payload)
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if err != nil {
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return nil, err
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}
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return client.Do(req)
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}
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// getRawState asks vfkit for virtual machine state unmodified (see state())
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func (vf *VfkitHelper) getRawState() (define.Status, error) {
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var response rest.VMState
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endPoint := vf.Endpoint + state
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serverResponse, err := vf.get(endPoint, nil)
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if err != nil {
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if errors.Is(err, unix.ECONNREFUSED) {
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logrus.Debugf("connection refused: %s", endPoint)
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}
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return "", err
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}
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err = json.NewDecoder(serverResponse.Body).Decode(&response)
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if err != nil {
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return "", err
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}
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if err := serverResponse.Body.Close(); err != nil {
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logrus.Error(err)
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}
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return ToMachineStatus(response.State)
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}
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// state asks vfkit for the virtual machine state. in case the vfkit
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// service is not responding, we assume the service is not running
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// and return a stopped status
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func (vf *VfkitHelper) State() (define.Status, error) {
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vmState, err := vf.getRawState()
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if err == nil {
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return vmState, nil
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}
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if errors.Is(err, unix.ECONNREFUSED) {
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return define.Stopped, nil
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}
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return "", err
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}
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func (vf *VfkitHelper) stateChange(newState rest.StateChange) error {
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b, err := json.Marshal(rest.VMState{State: string(newState)})
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if err != nil {
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return err
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}
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payload := bytes.NewReader(b)
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_, err = vf.post(vf.Endpoint+state, payload)
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return err
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}
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func (vf *VfkitHelper) Stop(force, wait bool) error {
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waitDuration := time.Millisecond * 10
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// TODO Add ability to wait until stopped
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if force {
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if err := vf.stateChange(rest.HardStop); err != nil {
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return err
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}
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} else {
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if err := vf.stateChange(rest.Stop); err != nil {
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return err
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}
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}
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if !wait {
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return nil
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}
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waitErr := fmt.Errorf("failed waiting for vm to stop")
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// Backoff to wait on the machine shutdown
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for i := 0; i < 11; i++ {
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_, err := vf.getRawState()
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if err != nil || errors.Is(err, unix.ECONNREFUSED) {
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waitErr = nil
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break
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}
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waitDuration *= 2
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logrus.Debugf("backoff wait time: %s", waitDuration.String())
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time.Sleep(waitDuration)
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}
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return waitErr
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}
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// VfkitHelper describes the use of vfkit: cmdline and endpoint
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type VfkitHelper struct {
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LogLevel logrus.Level
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Endpoint string
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VfkitBinaryPath *define.VMFile
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VirtualMachine *config.VirtualMachine
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}
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