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https://github.com/ceph/ceph-csi.git
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526ff95f10
Previously in ControllerExpandVolume() we had a check for encrypted volumes and we use to fail for all expand requests on an encrypted volume. Also for Block VolumeMode PVCs NodeExpandVolume used to be ignored/skipped. With these changes, we add support for the expansion of encrypted volumes. Also for raw Block VolumeMode PVCs with Encryption we call NodeExpandVolume. That said, With LUKS1, cryptsetup utility doesn't prompt for a passphrase on resizing the crypto mapper device. This is because LUKS1 devices don't use kernel keyring for volume keys. Whereas, LUKS2 devices use kernel keyring for volume key by default, i.e. cryptsetup utility asks for a passphrase if it detects volume key was previously passed to dm-crypt via kernel keyring service, we are overriding the default by --disable-keyring option during cryptsetup open command. So that at the time of crypto mapper device resize we will not be prompted for any passphrase. Fixes: #1469 Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
/*
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Copyright 2019 The Ceph-CSI Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package util
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import (
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"bytes"
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"fmt"
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"os/exec"
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"strings"
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)
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// LuksFormat sets up volume as an encrypted LUKS partition.
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func LuksFormat(devicePath, passphrase string) (stdout, stderr []byte, err error) {
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return execCryptsetupCommand(
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&passphrase,
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"-q",
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"luksFormat",
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"--type",
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"luks2",
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"--hash",
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"sha256",
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devicePath,
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"-d",
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"/dev/stdin")
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}
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// LuksOpen opens LUKS encrypted partition and sets up a mapping.
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func LuksOpen(devicePath, mapperFile, passphrase string) (stdout, stderr []byte, err error) {
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// cryptsetup option --disable-keyring (introduced with cryptsetup v2.0.0)
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// will be ignored with luks1
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return execCryptsetupCommand(&passphrase, "luksOpen", devicePath, mapperFile, "--disable-keyring", "-d", "/dev/stdin")
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}
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// LuksResize resizes LUKS encrypted partition.
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func LuksResize(mapperFile string) (stdout, stderr []byte, err error) {
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return execCryptsetupCommand(nil, "resize", mapperFile)
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}
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// LuksClose removes existing mapping.
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func LuksClose(mapperFile string) (stdout, stderr []byte, err error) {
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return execCryptsetupCommand(nil, "luksClose", mapperFile)
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}
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// LuksStatus returns encryption status of a provided device.
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func LuksStatus(mapperFile string) (stdout, stderr []byte, err error) {
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return execCryptsetupCommand(nil, "status", mapperFile)
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}
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func execCryptsetupCommand(stdin *string, args ...string) (stdout, stderr []byte, err error) {
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var (
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program = "cryptsetup"
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cmd = exec.Command(program, args...) // #nosec:G204, commands executing not vulnerable.
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sanitizedArgs = StripSecretInArgs(args)
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stdoutBuf bytes.Buffer
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stderrBuf bytes.Buffer
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)
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cmd.Stdout = &stdoutBuf
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cmd.Stderr = &stderrBuf
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if stdin != nil {
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cmd.Stdin = strings.NewReader(*stdin)
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}
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if err := cmd.Run(); err != nil {
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return stdoutBuf.Bytes(), stderrBuf.Bytes(), fmt.Errorf("an error (%v)"+
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" occurred while running %s args: %v", err, program, sanitizedArgs)
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}
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return stdoutBuf.Bytes(), nil, nil
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}
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