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util: make ExecComand return stdout and stderr as string

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Most consumers of util.ExecCommand() need to convert the returned []byte
format of stdout and/or stderr to string. By having util.ExecCommand()
return strings instead, the code gets a little simpler.

A few commands return JSON that needs to be parsed. These commands will
be replaced by go-ceph implementations later on. For now, convert the
strings back to []byte when needed.

Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos
2020-07-22 14:53:22 +02:00
committed by mergify[bot]
parent ddac66d76b
commit 36469b87e2
6 changed files with 31 additions and 28 deletions
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16
internal/rbd/rbd_attach.go
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@ -90,9 +90,9 @@ func rbdGetDeviceList(ctx context.Context, accessType string) ([]rbdDeviceInfo,
}
if accessType == accessTypeKRbd {
err = json.Unmarshal(stdout, &rbdDeviceList)
err = json.Unmarshal([]byte(stdout), &rbdDeviceList)
} else {
err = json.Unmarshal(stdout, &nbdDeviceList)
err = json.Unmarshal([]byte(stdout), &nbdDeviceList)
}
if err != nil {
return nil, fmt.Errorf("error to parse JSON output of device list for devices of type (%s): (%v)", accessType, err)
@ -231,7 +231,7 @@ func createPath(ctx context.Context, volOpt *rbdVolume, cr *util.Credentials) (s
// Execute map
stdout, stderr, err := util.ExecCommand(ctx, rbd, mapOptions...)
if err != nil {
klog.Warningf(util.Log(ctx, "rbd: map error %v, rbd output: %s"), err, string(stderr))
klog.Warningf(util.Log(ctx, "rbd: map error %v, rbd output: %s"), err, stderr)
// unmap rbd image if connection timeout
if strings.Contains(err.Error(), rbdMapConnectionTimeout) {
detErr := detachRBDImageOrDeviceSpec(ctx, imagePath, true, isNbd, volOpt.Encrypted, volOpt.VolID)
@ -239,9 +239,9 @@ func createPath(ctx context.Context, volOpt *rbdVolume, cr *util.Credentials) (s
klog.Warningf(util.Log(ctx, "rbd: %s unmap error %v"), imagePath, detErr)
}
}
return "", fmt.Errorf("rbd: map failed %v, rbd output: %s", err, string(stderr))
return "", fmt.Errorf("rbd: map failed with error %v, rbd error output: %s", err, stderr)
}
devicePath := strings.TrimSuffix(string(stdout), "\n")
devicePath := strings.TrimSuffix(stdout, "\n")
return devicePath, nil
}
@ -311,13 +311,13 @@ func detachRBDImageOrDeviceSpec(ctx context.Context, imageOrDeviceSpec string, i
// Messages for krbd and nbd differ, hence checking either of them for missing mapping
// This is not applicable when a device path is passed in
if isImageSpec &&
(strings.Contains(string(stderr), fmt.Sprintf(rbdUnmapCmdkRbdMissingMap, imageOrDeviceSpec)) ||
strings.Contains(string(stderr), fmt.Sprintf(rbdUnmapCmdNbdMissingMap, imageOrDeviceSpec))) {
(strings.Contains(stderr, fmt.Sprintf(rbdUnmapCmdkRbdMissingMap, imageOrDeviceSpec)) ||
strings.Contains(stderr, fmt.Sprintf(rbdUnmapCmdNbdMissingMap, imageOrDeviceSpec))) {
// Devices found not to be mapped are treated as a successful detach
util.TraceLog(ctx, "image or device spec (%s) not mapped", imageOrDeviceSpec)
return nil
}
return fmt.Errorf("rbd: unmap for spec (%s) failed (%v): (%s)", imageOrDeviceSpec, err, string(stderr))
return fmt.Errorf("rbd: unmap for spec (%s) failed (%v): (%s)", imageOrDeviceSpec, err, stderr)
}
return nil