Chapter 2. MTC release notes

Support for KubeVirt Virtual Machines with DirectVolumeMigration

MTC 1.8.4 adds support for KubeVirt Virtual Machines (VMs) with Direct Volume Migration (DVM).

Ansible Operator is broken when OpenShift Virtualization is installed

There is a bug in the python3-openshift package that installing OpenShift Virtualization exposes, with an exception, ValueError: too many values to unpack, returned during the task. Earlier versions of MTC are impacted, while MTC 1.8.4 has implemented a workaround. Updating to MTC 1.8.4 means you are no longer affected by this issue. (OCPBUGS-38116)

UI stuck at Namespaces while creating a migration plan

When trying to create a migration plan from the MTC UI, the migration plan wizard becomes stuck at the Namespaces step. This issue has been resolved in MTC 1.8.4. (MIG-1597)

Migration fails with error of no matches for kind Virtual machine in version kubevirt/v1

During the migration of an application, all the necessary steps, including the backup, DVM, and restore, are successfully completed. However, the migration is marked as unsuccessful with the error message no matches for kind Virtual machine in version kubevirt/v1. (MIG-1594)

Direct Volume Migration fails when migrating to a namespace different from the source namespace

On performing a migration from source cluster to target cluster, with the target namespace different from the source namespace, the DVM fails. (MIG-1592)

Direct Image Migration does not respect label selector on migplan

When using Direct Image Migration (DIM), if a label selector is set on the migration plan, DIM does not respect it and attempts to migrate all imagestreams in the namespace. (MIG-1533)

The associated SCC for service account cannot be migrated in OpenShift Container Platform 4.12

The associated Security Context Constraints (SCCs) for service accounts in OpenShift Container Platform 4.12 cannot be migrated. This issue is planned to be resolved in a future release of MTC. (MIG-1454).

Rsync pod fails to start causing the DVM phase to fail

The DVM phase fails due to the Rsync pod failing to start, because of a permission issue.

Migrated builder pod fails to push to image registry

When migrating an application including BuildConfig from source to target cluster, the builder pod results in error, failing to push the image to the image registry.

Conflict condition gets cleared briefly after it is created

When creating a new state migration plan that results in a conflict error, that error is cleared shorty after it is displayed.

PvCapacityAdjustmentRequired Warning Not Displayed After Setting pv_resizing_threshold

The PvCapacityAdjustmentRequired warning fails to appear in the migration plan after the pv_resizing_threshold is adjusted.

OADP 1.3 is now supported

MTC 1.8.3 adds support to OpenShift API for Data Protection (OADP) as a dependency of MTC 1.8.z.

CVE-2024-24786: Flaw in Golang protobuf module causes unmarshal function to enter infinite loop

In previous releases of MTC, a vulnerability was found in Golang’s protobuf module, where the unmarshal function entered an infinite loop while processing certain invalid inputs. Consequently, an attacker provided carefully constructed invalid inputs, which caused the function to enter an infinite loop.

CVE-2023-45857: Axios Cross-Site Request Forgery Vulnerability

In previous releases of MTC, a vulnerability was discovered in Axios 1.5.1 that inadvertently revealed a confidential XSRF-TOKEN stored in cookies by including it in the HTTP header X-XSRF-TOKEN for every request made to the host, allowing attackers to view sensitive information.

Restic backup does not work properly when the source workload is not quiesced

In previous releases of MTC, some files did not migrate when deploying an application with a route. The Restic backup did not function as expected when the quiesce option was unchecked for the source workload.

The Migration Controller fails to install due to an unsupported value error in Velero

The MigrationController failed to install due to an unsupported value error in Velero. Updating OADP 1.3.0 to OADP 1.3.1 resolves this problem. For more information, see BZ#2267018.

Ansible Operator is broken when OpenShift Virtualization is installed

There is a bug in the python3-openshift package that installing OpenShift Virtualization exposes, with an exception, ValueError: too many values to unpack, returned during the task. MTC 1.8.4 has implemented a workaround. Updating to MTC 1.8.4 means you are no longer affected by this issue. (OCPBUGS-38116)

The associated SCC for service account cannot be migrated in OpenShift Container Platform 4.12

The associated Security Context Constraints (SCCs) for service accounts in OpenShift Container Platform version 4.12 cannot be migrated. This issue is planned to be resolved in a future release of MTC. (MIG-1454).

Backup phase fails after setting custom CA replication repository

In previous releases of Migration Toolkit for Containers (MTC), after editing the replication repository, adding a custom CA certificate, successfully connecting the repository, and triggering a migration, a failure occurred during the backup phase.

CVE-2023-26136: tough-cookie package before 4.1.3 are vulnerable to Prototype Pollution

In previous releases of (MTC), versions before 4.1.3 of the tough-cookie package used in MTC were vulnerable to prototype pollution. This vulnerability occurred because CookieJar did not handle cookies properly when the value of the rejectPublicSuffixes was set to false.

CVE-2022-25883 openshift-migration-ui-container: nodejs-semver: Regular expression denial of service

In previous releases of (MTC), versions of the semver package before 7.5.2, used in MTC, were vulnerable to Regular Expression Denial of Service (ReDoS) from the function newRange, when untrusted user data was provided as a range.

Ansible Operator is broken when OpenShift Virtualization is installed

There is a bug in the python3-openshift package that installing OpenShift Virtualization exposes, with an exception, ValueError: too many values to unpack, returned during the task. MTC 1.8.4 has implemented a workaround. Updating to MTC 1.8.4 means you are no longer affected by this issue. (OCPBUGS-38116)

CVE-2023-39325: golang: net/http, x/net/http2: rapid stream resets can cause excessive work

A flaw was found in handling multiplexed streams in the HTTP/2 protocol, which is used by Migration Toolkit for Containers (MTC). A client could repeatedly make a request for a new multiplex stream and immediately send an RST_STREAM frame to cancel it. This creates additional workload for the server in terms of setting up and dismantling streams, while avoiding any server-side limitations on the maximum number of active streams per connection, resulting in a denial of service due to server resource consumption. (BZ#2245079)

Ansible Operator is broken when OpenShift Virtualization is installed

There is a bug in the python3-openshift package that installing OpenShift Virtualization exposes. An exception, ValueError: too many values to unpack, is returned during the task. MTC 1.8.4 has implemented a workaround. Updating to MTC 1.8.4 means you are no longer affected by this issue. (OCPBUGS-38116)

Indirect migration is stuck on backup stage

In previous releases, an indirect migration became stuck at the backup stage, due to InvalidImageName error. ((BZ#2233097))

PodVolumeRestore remain In Progress keeping the migration stuck at Stage Restore

In previous releases, on performing an indirect migration, the migration became stuck at the Stage Restore step, waiting for the podvolumerestore to be completed. ((BZ#2233868))

Migrated application unable to pull image from internal registry on target cluster

In previous releases, on migrating an application to the target cluster, the migrated application failed to pull the image from the internal image registry resulting in an application failure. ((BZ#2233103))

Migration failing on Azure due to authorization issue

In previous releases, on an Azure cluster, when backing up to Azure storage, the migration failed at the Backup stage. ((BZ#2238974))

Ansible Operator is broken when OpenShift Virtualization is installed

There is a bug in the python3-openshift package that installing OpenShift Virtualization exposes, with an exception ValueError: too many values to unpack returned during the task. MTC 1.8.4 has implemented a workaround. Updating to MTC 1.8.4 means you are no longer affected by this issue. (OCPBUGS-38116)

Old Restic pods are not getting removed on upgrading MTC 1.7.x 1.8.x

In this release, on upgrading the MTC Operator from 1.7.x to 1.8.x, the old Restic pods are not being removed. Therefore after the upgrade, both Restic and node-agent pods are visible in the namespace. ((BZ#2236829))

Migrated builder pod fails to push to image registry

In this release, on migrating an application including a BuildConfig from a source to target cluster, builder pod results in error, failing to push the image to the image registry. ((BZ#2234781))

[UI] CA bundle file field is not properly cleared

In this release, after enabling Require SSL verification and adding content to the CA bundle file for an MCG NooBaa bucket in MigStorage, the connection fails as expected. However, when reverting these changes by removing the CA bundle content and clearing Require SSL verification, the connection still fails. The issue is only resolved by deleting and re-adding the repository. ((BZ#2240052))

Backup phase fails after setting custom CA replication repository

In (MTC), after editing the replication repository, adding a custom CA certificate, successfully connecting the repository, and triggering a migration, a failure occurs during the backup phase.

CVE-2023-26136: tough-cookie package before 4.1.3 are vulnerable to Prototype Pollution

Versions before 4.1.3 of the tough-cookie package, used in MTC, are vulnerable to prototype pollution. This vulnerability occurs because CookieJar does not handle cookies properly when the value of the rejectPublicSuffixes is set to false.

CVE-2022-25883 openshift-migration-ui-container: nodejs-semver: Regular expression denial of service

In previous releases of (MTC), versions of the semver package before 7.5.2, used in MTC, are vulnerable to Regular Expression Denial of Service (ReDoS) from the function newRange, when untrusted user data is provided as a range.

CVE-2023-45290: Golang: net/http: Memory exhaustion in the Request.ParseMultipartForm method

A flaw was found in the net/http Golang standard library package, which impacts earlier versions of MTC. When parsing a multipart form, either explicitly with Request.ParseMultipartForm or implicitly with Request.FormValue, Request.PostFormValue, or Request.FormFile methods, limits on the total size of the parsed form are not applied to the memory consumed while reading a single form line. This permits a maliciously crafted input containing long lines to cause the allocation of arbitrarily large amounts of memory, potentially leading to memory exhaustion.

CVE-2024-24783: Golang: crypto/x509: Verify panics on certificates with an unknown public key algorithm

A flaw was found in the crypto/x509 Golang standard library package, which impacts earlier versions of MTC. Verifying a certificate chain that contains a certificate with an unknown public key algorithm causes Certificate.Verify to panic. This affects all crypto/tls clients and servers that set Config.ClientAuth to VerifyClientCertIfGiven or RequireAndVerifyClientCert. The default behavior is for TLS servers to not verify client certificates.

CVE-2024-24784: Golang: net/mail: Comments in display names are incorrectly handled

A flaw was found in the net/mail Golang standard library package, which impacts earlier versions of MTC. The ParseAddressList function incorrectly handles comments, text in parentheses, and display names. As this is a misalignment with conforming address parsers, it can result in different trust decisions being made by programs using different parsers.

CVE-2024-24785: Golang: html/template: Errors returned from MarshalJSON methods may break template escaping

A flaw was found in the html/template Golang standard library package, which impacts earlier versions of MTC. If errors returned from MarshalJSON methods contain user-controlled data, they could be used to break the contextual auto-escaping behavior of the html/template package, allowing subsequent actions to inject unexpected content into templates.

CVE-2024-29180: webpack-dev-middleware: Lack of URL validation may lead to file leak

A flaw was found in the webpack-dev-middleware package, which impacts earlier versions of MTC. This flaw fails to validate the supplied URL address sufficiently before returning local files, which could allow an attacker to craft URLs to return arbitrary local files from the developer’s machine.

CVE-2024-30255: envoy: HTTP/2 CPU exhaustion due to CONTINUATION frame flood

A flaw was found in how the envoy proxy implements the HTTP/2 codec, which impacts earlier versions of MTC. There are insufficient limitations placed on the number of CONTINUATION frames that can be sent within a single stream, even after exceeding the header map limits of envoy. This flaw could allow an unauthenticated remote attacker to send packets to vulnerable servers. These packets could consume compute resources and cause a denial of service (DoS).

Direct Volume Migration is failing as the Rsync pod on the source cluster goes into an Error state

On migrating any application with a Persistent Volume Claim (PVC), the Stage migration operation succeeds with warnings, but the Direct Volume Migration (DVM) fails with the rsync pod on the source namespace moving into an error state. (BZ#2256141)

The conflict condition is briefly cleared after it is created

When creating a new state migration plan that returns a conflict error message, the error message is cleared very shortly after it is displayed. (BZ#2144299)

Migration fails when there are multiple Volume Snapshot Locations of different provider types configured in a cluster

When there are multiple Volume Snapshot Locations (VSLs) in a cluster with different provider types, but you have not set any of them as the default VSL, Velero results in a validation error that causes migration operations to fail. (BZ#2180565)

CVE-2024-24786: A flaw was found in Golang’s protobuf module, where the unmarshal function can enter an infinite loop

A flaw was found in the protojson.Unmarshal function that could cause the function to enter an infinite loop when unmarshaling certain forms of invalid JSON messages. This condition could occur when unmarshaling into a message that contained a google.protobuf.Any value or when the UnmarshalOptions.DiscardUnknown option was set in a JSON-formatted message.

CVE-2024-28180: jose-go improper handling of highly compressed data

A vulnerability was found in Jose due to improper handling of highly compressed data. An attacker could send a JSON Web Encryption (JWE) encrypted message that contained compressed data that used large amounts of memory and CPU when decompressed by the Decrypt or DecryptMulti functions. 

Direct Volume Migration is failing as the Rsync pod on the source cluster goes into an Error state

On migrating any application with Persistent Volume Claim (PVC), the Stage migration operation succeeds with warnings, and Direct Volume Migration (DVM) fails with the rsync pod on the source namespace going into an error state. (BZ#2256141)

The conflict condition is briefly cleared after it is created

When creating a new state migration plan that results in a conflict error message, the error message is cleared shortly after it is displayed. (BZ#2144299)

Migration fails when there are multiple Volume Snapshot Locations (VSLs) of different provider types configured in a cluster with no specified default VSL.

When there are multiple VSLs in a cluster with different provider types, and you set none of them as the default VSL, Velero results in a validation error that causes migration operations to fail. (BZ#2180565)

CVE-2023-39325 CVE-2023-44487: various flaws

A flaw was found in the handling of multiplexed streams in the HTTP/2 protocol, which is utilized by Migration Toolkit for Containers (MTC). A client could repeatedly make a request for a new multiplex stream then immediately send an RST_STREAM frame to cancel those requests. This activity created additional workloads for the server in terms of setting up and dismantling streams, but avoided any server-side limitations on the maximum number of active streams per connection. As a result, a denial of service occurred due to server resource consumption.

Error code 504 is displayed on the Migration details page

On the Migration details page, at first, the migration details are displayed without any issues. However, after sometime, the details disappear, and a 504 error is returned. (BZ#2231106)

Old restic pods are not removed when upgrading MTC 1.7.x to MTC 1.8

On upgrading the MTC operator from 1.7.x to 1.8.x, the old restic pods are not removed. After the upgrade, both restic and node-agent pods are visible in the namespace. (BZ#2236829)

Adjust rsync options in DVM

In this release, you can prevent absolute symlinks from being manipulated by Rsync in the course of direct volume migration (DVM). Running DVM in privileged mode preserves absolute symlinks inside the persistent volume claims (PVCs). To switch to privileged mode, in the MigrationController CR, set the migration_rsync_privileged spec to true. (BZ#2204461)

Adjust rsync options in DVM

In this release, users are unable to prevent absolute symlinks from being manipulated by rsync during direct volume migration (DVM). (BZ#2204461)

Velero image cannot be overridden in the MTC operator

In previous releases, it was not possible to override the velero image using the velero_image_fqin parameter in the MigrationController Custom Resource (CR). (BZ#2143389)

Adding a MigCluster from the UI fails when the domain name has more than six characters

In previous releases, adding a MigCluster from the UI failed when the domain name had more than six characters. The UI code expected a domain name of between two and six characters. (BZ#2152149)

UI fails to render the Migrations' page: Cannot read properties of undefined (reading 'name')

In previous releases, the UI failed to render the Migrations' page, returning Cannot read properties of undefined (reading 'name'). (BZ#2163485)

Creating DPA resource fails on Red Hat OpenShift Container Platform 4.6 clusters

In previous releases, when deploying MTC on an OpenShift Container Platform 4.6 cluster, the DPA failed to be created according to the logs, which resulted in some pods missing. From the logs in the migration-controller in the OCP 4.6 cluster, it indicated that an unexpected null value was passed, which caused the error. (BZ#2173742)

Implement proposed changes for DVM support with PSA in Red Hat OpenShift Container Platform 4.12

With the incoming enforcement of Pod Security Admission (PSA) in OpenShift Container Platform 4.12 the default pod would run with a restricted profile. This restricted profile would mean workloads to migrate would be in violation of this policy and no longer work as of now. The following enhancement outlines the changes that would be required to remain compatible with OCP 4.12. (MIG-1240)

Unable to create Storage Class Conversion plan due to missing cronjob error in Red Hat OpenShift Platform 4.12

In previous releases, on the persistent volumes page, an error is thrown that a CronJob is not available in version batch/v1beta1, and when clicking on cancel, the migplan is created with status Not ready. (BZ#2143628)

Conflict conditions are cleared briefly after they are created

When creating a new state migration plan that will result in a conflict error, that error is cleared shorty after it is displayed. (BZ#2144299)

Direct Volume Migration is failing as rsync pod on source cluster move into Error state

In previous release, migration succeeded with warnings but Direct Volume Migration failed with rsync pod on source namespace going into error state. (*BZ#2132978)

Velero image cannot be overridden in the MTC operator

In previous releases, it was not possible to override the velero image using the velero_image_fqin parameter in the MigrationController Custom Resource (CR). (BZ#2143389)

When editing a MigHook in the UI, the page might fail to reload

The UI might fail to reload when editing a hook if there is a network connection issue. After the network connection is restored, the page will fail to reload until the cache is cleared. (BZ#2140208)

Rollback missing out deletion of some resources from the target cluster

On performing the roll back of an application from the MTC UI, some resources are not being deleted from the target cluster and the roll back is showing a status as successfully completed. (BZ#2126880)

Correct DNS validation for destination namespace

In previous releases, the MigPlan could not be validated if the destination namespace started with a non-alphabetic character. (BZ#2102231)

Deselecting all PVCs from UI still results in an attempted PVC transfer

In previous releases, while doing a full migration, unselecting the persistent volume claims (PVCs) would not skip selecting the PVCs and still try to migrate them. (BZ#2106073)

Incorrect DNS validation for destination namespace

In previous releases, MigPlan could not be validated because the destination namespace started with a non-alphabetic character. (BZ#2102231)

MTC UI does not display logs correctly

In previous releases, the MTC UI did not display logs correctly. (BZ#2062266)

StorageClass conversion plan adding migstorage reference in migplan

In previous releases, StorageClass conversion plans had a migstorage reference even though it was not being used. (BZ#2078459)

Velero pod log missing from downloaded logs

In previous releases, when downloading a compressed (.zip) folder for all logs, the velero pod was missing. (BZ#2076599)

Velero pod log missing from UI drop down

In previous releases, after a migration was performed, the velero pod log was not included in the logs provided in the dropdown list. (BZ#2076593)

Rsync options logs not visible in log-reader pod

In previous releases, when trying to set any valid or invalid rsync options in the migrationcontroller, the log-reader was not showing any logs regarding the invalid options or about the rsync command being used. (BZ#2079252)

Default CPU requests on Velero/Restic are too demanding and fail in certain environments

In previous releases, the default CPU requests on Velero/Restic were too demanding and fail in certain environments. Default CPU requests for Velero and Restic Pods are set to 500m. These values were high. (BZ#2088022)

Updating the replication repository to a different storage provider type is not respected by the UI

After updating the replication repository to a different type and clicking Update Repository, it shows connection successful, but the UI is not updated with the correct details. When clicking on the Edit button again, it still shows the old replication repository information.

Migrations fails because the backup is not found

Migration fails at the restore stage because of initial backup has not been found. (BZ#2104874)

Update Cluster button is not enabled when updating Azure resource group

When updating the remote cluster, selecting the Azure resource group checkbox, and adding a resource group does not enable the Update cluster option. (BZ#2098594)

Error pop-up in UI on deleting migstorage resource

When creating a backupStorage credential secret in OpenShift Container Platform, if the migstorage is removed from the UI, a 404 error is returned and the underlying secret is not removed. (BZ#2100828)

Miganalytic resource displaying resource count as 0 in UI

After creating a migplan from backend, the Miganalytic resource displays the resource count as 0 in UI. (BZ#2102139)

Registry validation fails when two trailing slashes are added to the Exposed route host to image registry

After adding two trailing slashes, meaning //, to the exposed registry route, the MigCluster resource is showing the status as connected. When creating a migplan from backend with DIM, the plans move to the unready status. (BZ#2104864)

Service Account Token not visible while editing source cluster

When editing the source cluster that has been added and is in Connected state, in the UI, the service account token is not visible in the field. To save the wizard, you have to fetch the token again and provide details inside the field. (BZ#2097668)

Incorrect DNS validation for destination namespace

MigPlan cannot be validated because the destination namespace starts with a non-alphabetic character. (BZ#2102231)

Cloud propagation phase in migration controller is not functioning due to missing labels on Velero pods

The Cloud propagation phase in the migration controller is not functioning due to missing labels on Velero pods. The EnsureCloudSecretPropagated phase in the migration controller waits until replication repository secrets are propagated on both sides. As this label is missing on Velero pods, the phase is not functioning as expected. (BZ#2088026)

Default CPU requests on Velero/Restic are too demanding when making scheduling fail in certain environments

Default CPU requests on Velero/Restic are too demanding when making scheduling fail in certain environments. Default CPU requests for Velero and Restic Pods are set to 500m. These values are high. The resources can be configured in DPA using the podConfig field for Velero and Restic. Migration operator should set CPU requests to a lower value, such as 100m, so that Velero and Restic pods can be scheduled in resource constrained environments MTC often operates in. (BZ#2088022)

Warning is displayed on persistentVolumes page after editing storage class conversion plan

A warning is displayed on the persistentVolumes page after editing the storage class conversion plan. When editing the existing migration plan, a warning is displayed on the UI At least one PVC must be selected for Storage Class Conversion. (BZ#2079549)

Velero pod log missing from downloaded logs

When downloading a compressed (.zip) folder for all logs, the velero pod is missing. (BZ#2076599)

Velero pod log missing from UI drop down

After a migration is performed, the velero pod log is not included in the logs provided in the dropdown list. (BZ#2076593)