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## v1.18
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### Download
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https://github.com/vmware-tanzu/velero/releases/tag/v1.18.0
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### Container Image
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`velero/velero:v1.18.0`
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### Documentation
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https://velero.io/docs/v1.18/
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### Upgrading
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https://velero.io/docs/v1.18/upgrade-to-1.18/
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### Highlights
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#### Concurrent backup
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In v1.18, Velero is capable to process multiple backups concurrently. This is a significant usability improvement, especially for multiple tenants or multiple users case, backups submitted from different users could run their backups simultaneously without interfering with each other.
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Check design https://github.com/vmware-tanzu/velero/blob/main/design/concurrent-backup-processing.md for more details.
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#### Cache volume for data movers
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In v1.18, Velero allows users to configure cache volumes for data mover pods during restore for CSI snapshot data movement and fs-backup. This brings below benefits:
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- Solve the problem that data mover pods fail to when pod's ephemeral disk is limited
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- Solve the problem that multiple data mover pods fail to run concurrently in one node when the node's ephemeral disk is limited
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- Working together with backup repository's cache limit configuration, cache volume with appropriate size helps to improve the restore throughput
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Check design https://github.com/vmware-tanzu/velero/blob/main/design/backup-repo-cache-volume.md for more details.
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#### Incremental size for data movers
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In v1.18, Velero allows users to observe the incremental size of data movers backups for CSI snapshot data movement and fs-backup, so that users could visually see the data reduction due to incremental backup.
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#### Wildcard support for namespaces
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In v1.18, Velero allows to use Glob regular expressions for namespace filters during backup and restore, so that users could filter namespaces in a batch manner.
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#### VolumePolicy for PVC phase
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In v1.18, Velero VolumePolicy supports actions by PVC phase, which help users to do special operations for PVCs with a specific phase, e.g., skip PVCs in Pending/Lost status from the backup.
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#### Scalability and Resiliency improvements
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##### Prevent Velero server OOM Kill for large backup repositories
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In v1.18, some backup repository operations are delay executed out of Velero server, so Velero server won't be OOM Killed.
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#### Performance improvement for VolumePolicy
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In v1.18, VolumePolicy is enhanced for large number of pods/PVCs so that the performance is significantly improved.
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#### Events for data mover pod diagnostic
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In v1.18, events are recorded into data mover pod diagnostic, which allows user to see more information for troubleshooting when the data mover pod fails.
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### Runtime and dependencies
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Golang runtime: 1.25.7
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kopia: 0.22.3
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### Limitations/Known issues
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### Breaking changes
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#### Deprecation of PVC selected node feature
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According to [Velero deprecation policy](https://github.com/vmware-tanzu/velero/blob/main/GOVERNANCE.md#deprecation-policy), PVC selected node feature is deprecated in v1.18. Velero could appropriately handle PVC's selected-node annotation, so users don't need to do anything particularly.
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### All Changes
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* Remove backup from running list when backup fails validation (#9498, @sseago)
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* Maintenance Job only uses the first element of the LoadAffinity array (#9494, @blackpiglet)
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* Fix issue #9478, add diagnose info on expose peek fails (#9481, @Lyndon-Li)
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* Add Role, RoleBinding, ClusterRole, and ClusterRoleBinding in restore sequence. (#9474, @blackpiglet)
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* Add maintenance job and data mover pod's labels and annotations setting. (#9452, @blackpiglet)
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* Fix plugin init container names exceeding DNS-1123 limit (#9445, @mpryc)
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* Add PVC-to-Pod cache to improve volume policy performance (#9441, @shubham-pampattiwar)
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* Remove VolumeSnapshotClass from CSI B/R process. (#9431, @blackpiglet)
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* Use hookIndex for recording multiple restore exec hooks. (#9366, @blackpiglet)
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* Sanitize Azure HTTP responses in BSL status messages (#9321, @shubham-pampattiwar)
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* Remove labels associated with previous backups (#9206, @Joeavaikath)
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* Add VolumePolicy support for PVC Phase conditions to allow skipping Pending PVCs (#9166, @claude)
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* feat: Enhance BackupStorageLocation with Secret-based CA certificate support (#9141, @kaovilai)
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* Add `--apply` flag to `install` command, allowing usage of Kubernetes apply to make changes to existing installs (#9132, @mjnagel)
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* Fix issue #9194, add doc for GOMAXPROCS behavior change (#9420, @Lyndon-Li)
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* Apply volume policies to VolumeGroupSnapshot PVC filtering (#9419, @shubham-pampattiwar)
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* Fix issue #9276, add doc for cache volume support (#9418, @Lyndon-Li)
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* Add Prometheus metrics for maintenance jobs (#9414, @shubham-pampattiwar)
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* Fix issue #9400, connect repo first time after creation so that init params could be written (#9407, @Lyndon-Li)
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* Cache volume for PVR (#9397, @Lyndon-Li)
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* Cache volume support for DataDownload (#9391, @Lyndon-Li)
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* don't copy securitycontext from first container if configmap found (#9389, @sseago)
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* Refactor repo provider interface for static configuration (#9379, @Lyndon-Li)
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* Fix issue #9365, prevent fake completion notification due to multiple update of single PVR (#9375, @Lyndon-Li)
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* Add cache volume configuration (#9370, @Lyndon-Li)
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* Track actual resource names for GenerateName in restore status (#9368, @shubham-pampattiwar)
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* Fix managed fields patch for resources using GenerateName (#9367, @shubham-pampattiwar)
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* Support cache volume for generic restore exposer and pod volume exposer (#9362, @Lyndon-Li)
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* Add incrementalSize to DU/PVB for reporting new/changed size (#9357, @sseago)
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* Add snapshotSize for DataDownload, PodVolumeRestore (#9354, @Lyndon-Li)
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* Add cache dir configuration for udmrepo (#9353, @Lyndon-Li)
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* Fix the Job build error when BackupReposiotry name longer than 63. (#9350, @blackpiglet)
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* Add cache configuration to VGDP (#9342, @Lyndon-Li)
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* Fix issue #9332, add bytesDone for cache files (#9333, @Lyndon-Li)
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* Fix typos in documentation (#9329, @T4iFooN-IX)
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* Concurrent backup processing (#9307, @sseago)
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* VerifyJSONConfigs verify every elements in Data. (#9302, @blackpiglet)
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* Fix issue #9267, add events to data mover prepare diagnostic (#9296, @Lyndon-Li)
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* Add option for privileged fs-backup pod (#9295, @sseago)
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* Fix issue #9193, don't connect repo in repo controller (#9291, @Lyndon-Li)
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* Implement concurrency control for cache of native VolumeSnapshotter plugin. (#9281, @0xLeo258)
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* Fix issue #7904, remove the code and doc for PVC node selection (#9269, @Lyndon-Li)
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* Fix schedule controller to prevent backup queue accumulation during extended blocking scenarios by properly handling empty backup phases (#9264, @shubham-pampattiwar)
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* Fix repository maintenance jobs to inherit allowlisted tolerations from Velero deployment (#9256, @shubham-pampattiwar)
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* Implement wildcard namespace pattern expansion for backup namespace includes/excludes. This change adds support for wildcard patterns (*, ?, [abc], {a,b,c}) in namespace includes and excludes during backup operations (#9255, @Joeavaikath)
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* Protect VolumeSnapshot field from race condition during multi-thread backup (#9248, @0xLeo258)
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* Update AzureAD Microsoft Authentication Library to v1.5.0 (#9244, @priyansh17)
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* Get pod list once per namespace in pvc IBA (#9226, @sseago)
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* Fix issue #7725, add design for backup repo cache configuration (#9148, @Lyndon-Li)
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* Fix issue #9229, don't attach backupPVC to the source node (#9233, @Lyndon-Li)
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* feat: Permit specifying annotations for the BackupPVC (#9173, @clementnuss)
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Lyndon-Li