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Commit 57f89da6 authored by Michael Schmidt's avatar Michael Schmidt
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Fix to detect unformatted volumes in CoreOS

The `file` command used here to check whether a device is formatted is not available for CoreOS. The effect is that the mounter tries to mount an unformatted volume which fails. This makes it quite tedious to use persistent volumes in CoreOS. This patch replaces the `file` command with `lsblk` which is available in CoreOS. I checked that it's also available on RHEL, Debian, Ubuntu and SLES.
parent 81d3bd9a
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Showing with 9 additions and 8 deletions
pkg/util/mount/mount.go
View file @ 57f89da6
......@@ -98,9 +98,10 @@ func (mounter *SafeFormatAndMount) formatAndMount(source string, target string,
// diskLooksUnformatted uses 'file' to see if the given disk is unformated
func (mounter *SafeFormatAndMount) diskLooksUnformatted(disk string) (bool, error) {
args := []string{"-L", "--special-files", disk}
cmd := mounter.Runner.Command("file", args...)
args := []string{"-nd", "-o", "FSTYPE", disk}
cmd := mounter.Runner.Command("lsblk", args...)
dataOut, err := cmd.CombinedOutput()
output := strings.TrimSpace(string(dataOut))
// TODO (#13212): check if this disk has partitions and return false, and
// an error if so.
......@@ -109,7 +110,7 @@ func (mounter *SafeFormatAndMount) diskLooksUnformatted(disk string) (bool, erro
return false, err
}
return !strings.Contains(string(dataOut), "filesystem"), nil
return output == "", nil
}
// New returns a mount.Interface for the current system.
......
pkg/util/mount/safe_format_and_mount_test.go
View file @ 57f89da6
......@@ -65,7 +65,7 @@ func TestSafeFormatAndMount(t *testing.T) {
fstype: "ext4",
mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'")},
execScripts: []ExecArgs{
{"file", []string{"-L", "--special-files", "/dev/foo"}, "ext4 filesystem", nil},
{"lsblk", []string{"-nd", "-o", "FSTYPE", "/dev/foo"}, "ext4", nil},
},
expectedError: fmt.Errorf("unknown filesystem type '(null)'"),
},
......@@ -73,7 +73,7 @@ func TestSafeFormatAndMount(t *testing.T) {
fstype: "ext4",
mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'")},
execScripts: []ExecArgs{
{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
{"lsblk", []string{"-nd", "-o", "FSTYPE", "/dev/foo"}, "", nil},
{"mkfs.ext4", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", fmt.Errorf("formatting failed")},
},
expectedError: fmt.Errorf("formatting failed"),
......@@ -82,7 +82,7 @@ func TestSafeFormatAndMount(t *testing.T) {
fstype: "ext4",
mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), fmt.Errorf("Still cannot mount")},
execScripts: []ExecArgs{
{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
{"lsblk", []string{"-nd", "-o", "FSTYPE", "/dev/foo"}, "", nil},
{"mkfs.ext4", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", nil},
},
expectedError: fmt.Errorf("Still cannot mount"),
......@@ -91,7 +91,7 @@ func TestSafeFormatAndMount(t *testing.T) {
fstype: "ext4",
mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
execScripts: []ExecArgs{
{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
{"lsblk", []string{"-nd", "-o", "FSTYPE", "/dev/foo"}, "", nil},
{"mkfs.ext4", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", nil},
},
expectedError: nil,
......@@ -100,7 +100,7 @@ func TestSafeFormatAndMount(t *testing.T) {
fstype: "ext3",
mountErrs: []error{fmt.Errorf("unknown filesystem type '(null)'"), nil},
execScripts: []ExecArgs{
{"file", []string{"-L", "--special-files", "/dev/foo"}, "data", nil},
{"lsblk", []string{"-nd", "-o", "FSTYPE", "/dev/foo"}, "", nil},
{"mkfs.ext3", []string{"-E", "lazy_itable_init=0,lazy_journal_init=0", "-F", "/dev/foo"}, "", nil},
},
expectedError: nil,
......
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