// List all volumes.
func (c *Driver) List(lo storage.ListOptions) ([]storage.Volume, error) {
poolName := lo.Params["pool"]
retry:
er, err := executor.NewCapture(exec.Command("rbd", "ls", poolName, "--format", "json")).Run(context.Background())
if err != nil {
return nil, err
}
if er.ExitStatus != 0 {
return nil, errored.Errorf("Listing pool %q: %v", poolName, er)
}
textList := []string{}
if err := json.Unmarshal([]byte(er.Stdout), &textList); err != nil {
logrus.Errorf("Unmarshalling ls for pool %q: %v. Retrying.", poolName, err)
time.Sleep(100 * time.Millisecond)
goto retry
}
list := []storage.Volume{}
for _, name := range textList {
list = append(list, storage.Volume{Name: c.externalName(strings.TrimSpace(name)), Params: storage.Params{"pool": poolName}})
}
return list, nil
}
// ListSnapshots returns an array of snapshot names provided a maximum number
// of snapshots to be returned. Any error will be returned.
func (c *Driver) ListSnapshots(do storage.DriverOptions) ([]string, error) {
intName, err := c.internalName(do.Volume.Name)
if err != nil {
return nil, err
}
poolName := do.Volume.Params["pool"]
cmd := exec.Command("rbd", "snap", "ls", mkpool(poolName, intName))
ctx, _ := context.WithTimeout(context.Background(), do.Timeout)
er, err := executor.NewCapture(cmd).Run(ctx)
if err != nil {
return nil, err
}
if er.ExitStatus != 0 {
return nil, errored.Errorf("Listing snapshots for (volume %q): %v", intName, er)
}
names := []string{}
lines := strings.Split(er.Stdout, "\n")
if len(lines) > 1 {
for _, line := range lines[1:] {
parts := spaceSplitRegex.Split(line, -1)
if len(parts) < 3 {
continue
}
names = append(names, parts[2])
}
}
return names, nil
}
func (c *Driver) showMapped(timeout time.Duration) (rbdMap, error) {
var (
er *executor.ExecResult
err error
)
retry:
rbdmap := rbdMap{}
cmd := exec.Command("rbd", "showmapped", "--format", "json")
ctx, _ := context.WithTimeout(context.Background(), timeout)
er, err = executor.NewCapture(cmd).Run(ctx)
if err != nil || er.ExitStatus != 0 || er.Stdout == "" {
logrus.Warnf("Could not show mapped volumes. Retrying: %v", er.Stderr)
time.Sleep(100 * time.Millisecond)
goto retry
}
if err := json.Unmarshal([]byte(er.Stdout), &rbdmap); err != nil {
logrus.Errorf("Could not parse RBD showmapped output, retrying: %s", er.Stderr)
time.Sleep(100 * time.Millisecond)
goto retry
}
return rbdmap, nil
}
func runWithTimeout(cmd *exec.Cmd, timeout time.Duration) (*executor.ExecResult, error) {
ctx, _ := context.WithTimeout(context.Background(), timeout)
return executor.NewCapture(cmd).Run(ctx)
}