InhibitWhenLuks: allow upgrades for LUKS2 bound to Clevis TPM2 token

So far, upgrades with encrypted drives were not supported. Encrypted drives require interactively typing unlock passphrases, which is not suitable for automatic upgrades using Leapp. We add a feature, where systems with all drives configured with automatic unlock method can be upgraded. Currently, we only support drives configured with Clevis/TPM2 token, because networking is not configured during Leapp upgrade (excluding NBDE). We consume LuksDumps message to decide whether the upgrade process should be inhibited. If there is at least one LUKS2 device without Clevis TPM2 binding, we inhibit the upgrade because we cannot tell if the device is not a part of a more complex storage stack and the failure to unlock the device migt cause boot problem. Co-authored-by: Petr Stodůlka <[email protected]>
oamg · Aug 6, 2024 · 93b48ca · 93b48ca
1 parent 467d2bc
commit 93b48ca
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diff --git a/repos/system_upgrade/common/actors/inhibitwhenluks/actor.py b/repos/system_upgrade/common/actors/inhibitwhenluks/actor.py
@@ -1,7 +1,7 @@
-from leapp import reporting
 from leapp.actors import Actor
-from leapp.models import CephInfo, StorageInfo
-from leapp.reporting import create_report, Report
+from leapp.libraries.actor.inhibitwhenluks import check_invalid_luks_devices
+from leapp.models import CephInfo, LuksDumps, StorageInfo, TargetUserSpaceUpgradeTasks
+from leapp.reporting import Report
 from leapp.tags import ChecksPhaseTag, IPUWorkflowTag
 
 
@@ -13,28 +13,9 @@ class InhibitWhenLuks(Actor):
     """
 
     name = 'check_luks_and_inhibit'
-    consumes = (StorageInfo, CephInfo)
-    produces = (Report,)
+    consumes = (CephInfo, LuksDumps, StorageInfo)
+    produces = (Report, TargetUserSpaceUpgradeTasks)
     tags = (ChecksPhaseTag, IPUWorkflowTag)
 
     def process(self):
-        # If encrypted Ceph volumes present, check if there are more encrypted disk in lsblk than Ceph vol
-        ceph_vol = []
-        try:
-            ceph_info = next(self.consume(CephInfo))
-            if ceph_info:
-                ceph_vol = ceph_info.encrypted_volumes[:]
-        except StopIteration:
-            pass
-
-        for storage_info in self.consume(StorageInfo):
-            for blk in storage_info.lsblk:
-                if blk.tp == 'crypt' and blk.name not in ceph_vol:
-                    create_report([
-                        reporting.Title('LUKS encrypted partition detected'),
-                        reporting.Summary('Upgrading system with encrypted partitions is not supported'),
-                        reporting.Severity(reporting.Severity.HIGH),
-                        reporting.Groups([reporting.Groups.BOOT, reporting.Groups.ENCRYPTION]),
-                        reporting.Groups([reporting.Groups.INHIBITOR]),
-                    ])
-                    break
+        check_invalid_luks_devices()
diff --git a/repos/system_upgrade/common/actors/inhibitwhenluks/libraries/inhibitwhenluks.py b/repos/system_upgrade/common/actors/inhibitwhenluks/libraries/inhibitwhenluks.py
@@ -0,0 +1,168 @@
+from leapp import reporting
+from leapp.libraries.common.config.version import get_source_major_version
+from leapp.libraries.stdlib import api
+from leapp.models import (
+    CephInfo,
+    DracutModule,
+    LuksDumps,
+    StorageInfo,
+    TargetUserSpaceUpgradeTasks,
+    UpgradeInitramfsTasks
+)
+from leapp.reporting import create_report
+
+
+# https://red.ht/clevis-tpm2-luks-auto-unlock-rhel8
+# https://red.ht/clevis-tpm2-luks-auto-unlock-rhel9
+# https://red.ht/convert-to-luks2-rhel8
+# https://red.ht/convert-to-luks2-rhel9
+CLEVIS_DOC_URL_FMT = 'https://red.ht/clevis-tpm2-luks-auto-unlock-rhel{}'
+LUKS2_CONVERT_DOC_URL_FMT = 'https://red.ht/convert-to-luks2-rhel{}'
+
+FMT_LIST_SEPARATOR = '\n    - '
+
+
+def _formatted_list_output(input_list, sep=FMT_LIST_SEPARATOR):
+    return ['{}{}'.format(sep, item) for item in input_list]
+
+
+def _at_least_one_tpm_token(luks_dump):
+    return any([token.token_type == "clevis-tpm2" for token in luks_dump.tokens])
+
+
+def _get_ceph_volumes():
+    ceph_info = next(api.consume(CephInfo), None)
+    return ceph_info.encrypted_volumes[:] if ceph_info else []
+
+
+def apply_obsoleted_check_ipu_7_8():
+    ceph_vol = _get_ceph_volumes()
+    for storage_info in api.consume(StorageInfo):
+        for blk in storage_info.lsblk:
+            if blk.tp == 'crypt' and blk.name not in ceph_vol:
+                create_report([
+                    reporting.Title('LUKS encrypted partition detected'),
+                    reporting.Summary('Upgrading system with encrypted partitions is not supported'),
+                    reporting.Severity(reporting.Severity.HIGH),
+                    reporting.Groups([reporting.Groups.BOOT, reporting.Groups.ENCRYPTION]),
+                    reporting.Groups([reporting.Groups.INHIBITOR]),
+                ])
+                break
+
+
+def report_inhibitor(luks1_partitions, no_tpm2_partitions):
+    source_major_version = get_source_major_version()
+    clevis_doc_url =  CLEVIS_DOC_URL_FMT.format(source_major_version)
+    luks2_convert_doc_url = LUKS2_CONVERT_DOC_URL_FMT.format(source_major_version)
+    summary = (
+        'We have detected LUKS encrypted volumes that do not meet current'
+        ' criteria to be able to proceed the in-place upgrade process.'
+        ' Right now the upgrade process requires for encrypted storage to be'
+        ' in LUKS2 format configured with Clevis TPM 2.0.'
+    )
+
+    report_hints = []
+
+    if luks1_partitions:
+
+        summary += (
+            '\n\nSince RHEL 8 the default format for LUKS encryption is LUKS2.'
+            ' Despite the old LUKS1 format is still supported on RHEL systems'
+            ' it has some limitations in comparison to LUKS2 and during initial'
+            ' investigation we have decided to support for upgrades only LUKS2'
+            ' format.'
+            ' The following LUKS1 partitions have been discovered on your system:{}'
+            .format(_formatted_list_output(luks1_partitions))
+        )
+        report_hints.append(reporting.Remediation(
+            hint=(
+                'Convert your LUKS1 encrypted devices to LUKS2 and bind it to TPM2 using clevis.'
+                ' If this is not possible in your case consider clean installation'
+                ' of the target RHEL system instead.'
+            )
+        ))
+        report_hints.append(reporting.ExternalLink(
+            url=luks2_convert_doc_url,
+            title='LUKS versions in RHEL: Conversion'
+        ))
+
+    if no_tpm2_partitions:
+        summary += (
+            '\n\nCurrently we require the process to be non-interactive and'
+            ' offline. For this reason we require automatic unlock of'
+            ' encrypted devices during the upgrade process.'
+            ' Currently we support automatic unlocking during the upgrade only'
+            ' for volumes bound to Clevis TPM2 token.'
+            ' The following LUKS2 devices without Clevis TPM2 token '
+            ' have been discovered on your system: {}'
+            .format(_formatted_list_output(no_tpm2_partitions))
+        )
+
+        report_hints.append(reporting.Remediation(
+            hint=(
+                'Add Clevis TPM2 binding to LUKS devices.'
+                ' If some LUKS devices use still the old LUKS1 format, convert'
+                ' them to LUKS2 prior to binding.'
+            )
+        ))
+        report_hints.append(reporting.ExternalLink(
+                url=clevis_doc_url,
+                title='Configuring manual enrollment of LUKS-encrypted volumes by using a TPM 2.0 policy'
+            )
+        )
+    create_report([
+        reporting.Title('Detected LUKS devices unsuitable for in-place upgrade.'),
+        reporting.Summary(summary),
+        reporting.Severity(reporting.Severity.HIGH),
+        reporting.Groups([reporting.Groups.BOOT, reporting.Groups.ENCRYPTION]),
+        reporting.Groups([reporting.Groups.INHIBITOR]),
+    ] + report_hints)
+
+
+def check_invalid_luks_devices():
+    if get_source_major_version() == '7':
+        # NOTE: keeping unchanged behaviour for IPU 7 -> 8
+        apply_obsoleted_check_ipu_7_8()
+        return
+
+
+    luks_dumps = next(api.consume(LuksDumps), None)
+    if not luks_dumps:
+        api.current_logger().debug('No LUKS volumes detected. Skipping.')
+        return
+
+    luks1_partitions = []
+    no_tpm2_partitions = []
+    ceph_vol = _get_ceph_volumes()
+    for luks_dump in luks_dumps.dumps:
+        # if the device is managed by ceph, don't inhibit
+        if luks_dump.device_name in ceph_vol:
+            api.current_logger().debug('Skipping LUKS CEPH volume: {}'.format(luks_dump.device_name))
+            continue
+
+
+        if luks_dump.version == 1:
+            luks1_partitions.append(luks_dump.device_name)
+        elif luks_dump.version == 2 and not _at_least_one_tpm_token(luks_dump):
+            no_tpm2_partitions.append(luks_dump.device_name)
+
+        if luks1_partitions or no_tpm2_partitions:
+            report_inhibitor(luks1_partitions, no_tpm2_partitions)
+        else:
+            required_crypt_rpms = [
+                'clevis',
+                'clevis-dracut',
+                'clevis-systemd',
+                'clevis-udisks2',
+                'clevis-luks',
+                'cryptsetup',
+                'tpm2-tss',
+                'tpm2-tools',
+                'tpm2-abrmd'
+            ]
+            api.produce(TargetUserSpaceUpgradeTasks(install_rpms=required_crypt_rpms))
+            api.produce(UpgradeInitramfsTasks(include_dracut_modules=[
+                    DracutModule(name='clevis'),
+                    DracutModule(name='clevis-pin-tpm2')
+                ])
+            )
diff --git a/repos/system_upgrade/common/actors/inhibitwhenluks/tests/test_inhibitwhenluks.py b/repos/system_upgrade/common/actors/inhibitwhenluks/tests/test_inhibitwhenluks.py
@@ -1,34 +1,117 @@
-from leapp.models import CephInfo, LsblkEntry, StorageInfo
+from leapp.libraries.common.config import version
+from leapp.models import CephInfo, LuksDump, LuksDumps, LuksToken, TargetUserSpaceUpgradeTasks
 from leapp.reporting import Report
 from leapp.snactor.fixture import current_actor_context
 from leapp.utils.report import is_inhibitor
 
 
-def test_actor_with_luks(current_actor_context):
-    with_luks = [LsblkEntry(name='luks-132', kname='kname1', maj_min='253:0', rm='0', size='10G', bsize=10*(1 << 39),
-                            ro='0', tp='crypt', mountpoint='', parent_name='', parent_path='')]
+def test_actor_with_luks1(monkeypatch, current_actor_context):
+    monkeypatch.setattr(version, 'get_target_major_version', lambda: '8')
+    current_actor_context.feed(CephInfo(encrypted_volumes=[]))
+    luks_dump = LuksDump(
+        version=1,
+        uuid="dd09e6d4-b595-4f1c-80b8-fd47540e6464",
+        device_path="/dev/sda",
+        device_name="sda")
+    luks_dumps = LuksDumps(dumps=[luks_dump])
+    current_actor_context.feed(luks_dumps)
+    current_actor_context.run()
+    assert current_actor_context.consume(Report)
+    report_fields = current_actor_context.consume(Report)[0].report
+    assert is_inhibitor(report_fields)
+    assert not current_actor_context.consume(TargetUserSpaceUpgradeTasks)
+
+    assert report_fields['title'].startswith("Invalid LUKS encrypted partition detected")
+    assert "LUKS1 partitions have been discovered on your system" in report_fields['summary']
+    assert luks_dump.device_name in report_fields['summary']
 
-    current_actor_context.feed(StorageInfo(lsblk=with_luks))
+
+def test_actor_with_luks2(monkeypatch, current_actor_context):
+    monkeypatch.setattr(version, 'get_target_major_version', lambda: '8')
+    current_actor_context.feed(CephInfo(encrypted_volumes=[]))
+    luks_dump = LuksDump(
+        version=2,
+        uuid="27b57c75-9adf-4744-ab04-9eb99726a301",
+        device_path="/dev/sda",
+        device_name="sda")
+    luks_dumps = LuksDumps(dumps=[luks_dump])
+    current_actor_context.feed(luks_dumps)
     current_actor_context.run()
     assert current_actor_context.consume(Report)
     report_fields = current_actor_context.consume(Report)[0].report
     assert is_inhibitor(report_fields)
+    assert not current_actor_context.consume(TargetUserSpaceUpgradeTasks)
 
+    assert report_fields['title'].startswith("Invalid LUKS encrypted partition detected")
+    assert "LUKS2 devices without clevis TPM2 token have been discovered on your system" in report_fields['summary']
+    assert luks_dump.device_name in report_fields['summary']
 
-def test_actor_with_luks_ceph_only(current_actor_context):
-    with_luks = [LsblkEntry(name='luks-132', kname='kname1', maj_min='253:0', rm='0', size='10G', bsize=10*(1 << 39),
-                            ro='0', tp='crypt', mountpoint='', parent_name='', parent_path='')]
-    ceph_volume = ['luks-132']
-    current_actor_context.feed(StorageInfo(lsblk=with_luks))
-    current_actor_context.feed(CephInfo(encrypted_volumes=ceph_volume))
+
+def test_actor_with_luks2_invalid_token(monkeypatch, current_actor_context):
+    monkeypatch.setattr(version, 'get_target_major_version', lambda: '8')
+    current_actor_context.feed(CephInfo(encrypted_volumes=[]))
+    luks_dump = LuksDump(
+        version=2,
+        uuid="dc1dbe37-6644-4094-9839-8fc5dcbec0c6",
+        device_path="/dev/sda",
+        device_name="sda",
+        tokens=[LuksToken(token_id=0, keyslot=1, token_type="clevis")])
+    luks_dumps = LuksDumps(dumps=[luks_dump])
+    current_actor_context.feed(luks_dumps)
+    current_actor_context.run()
+    assert current_actor_context.consume(Report)
+    report_fields = current_actor_context.consume(Report)[0].report
+    assert is_inhibitor(report_fields)
+
+    assert report_fields['title'].startswith("Invalid LUKS encrypted partition detected")
+    assert "LUKS2 devices without clevis TPM2 token have been discovered on your system" in report_fields['summary']
+    assert luks_dump.device_name in report_fields['summary']
+    assert not current_actor_context.consume(TargetUserSpaceUpgradeTasks)
+
+
+def test_actor_with_luks2_clevis_tpm_token(monkeypatch, current_actor_context):
+    monkeypatch.setattr(version, 'get_target_major_version', lambda: '8')
+    current_actor_context.feed(CephInfo(encrypted_volumes=[]))
+    luks_dump = LuksDump(
+        version=2,
+        uuid="83050bd9-61c6-4ff0-846f-bfd3ac9bfc67",
+        device_path="/dev/sda",
+        device_name="sda",
+        tokens=[LuksToken(token_id=0, keyslot=1, token_type="clevis-tpm2")])
+    luks_dumps = LuksDumps(dumps=[luks_dump])
+    current_actor_context.feed(luks_dumps)
     current_actor_context.run()
     assert not current_actor_context.consume(Report)
 
+    upgrade_tasks = current_actor_context.consume(TargetUserSpaceUpgradeTasks)
+    assert len(upgrade_tasks) == 1
+    assert set(upgrade_tasks[0].install_rpms) == set([
+                'clevis',
+                'clevis-dracut',
+                'clevis-systemd',
+                'clevis-udisks2',
+                'clevis-luks',
+                'cryptsetup',
+                'tpm2-tss',
+                'tpm2-tools',
+                'tpm2-abrmd'
+            ])
 
-def test_actor_without_luks(current_actor_context):
-    without_luks = [LsblkEntry(name='sda1', kname='sda1', maj_min='8:0', rm='0', size='10G', bsize=10*(1 << 39),
-                               ro='0', tp='part', mountpoint='/boot', parent_name='', parent_path='')]
 
-    current_actor_context.feed(StorageInfo(lsblk=without_luks))
+def test_actor_with_luks2_ceph(monkeypatch, current_actor_context):
+    monkeypatch.setattr(version, 'get_target_major_version', lambda: '8')
+    ceph_volume = ['sda']
+    current_actor_context.feed(CephInfo(encrypted_volumes=ceph_volume))
+    luks_dump = LuksDump(
+        version=2,
+        uuid="0edb8c11-1a04-4abd-a12d-93433ee7b8d8",
+        device_path="/dev/sda",
+        device_name="sda",
+        tokens=[LuksToken(token_id=0, keyslot=1, token_type="clevis")])
+    luks_dumps = LuksDumps(dumps=[luks_dump])
+    current_actor_context.feed(luks_dumps)
     current_actor_context.run()
     assert not current_actor_context.consume(Report)
+
+    # make sure we don't needlessly include clevis packages, when there is no clevis token
+    assert not current_actor_context.consume(TargetUserSpaceUpgradeTasks)