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This article describes Security Context Constraints(SCC) capabilities that need to be added to use Generic Backup and Restore feature capabilities on OCP 4.11 and higher.
With OCP 4.11, default security context constraints (SCC) have changed. Due to this, when using Generic Storage Backup and Restore with OCP 4.11 or higher, the following error message might be seen Failed to exec command in pod: command terminated with exit code 255 Full error message [{\"name\":\"FailedSubPhases\",\"value\":[{\"Err\":{\"cause\":{\"cause\":{\"cause\":{\"cause\":{\"cause\":{\"message\":\"{\\\"message\\\":\\\"Failed to backup data\\\",\\\"function\\\":\\\"kasten.io/k10/kio/kanister/function.(*backupDataFunc).Exec\\\",\\\"linenumber\\\":122,\\\"file\\\":\\\"kasten.io/k10/kio/kanister/function/backup_data.go:122\\\",\\\"cause\\\":{\\\"message\\\":\\\"2 errors have occurred\\\",\\\"errors\\\":[{\\\"message\\\":\\\"Failed to create the backup repository\\\",\\\"function\\\":\\\"kasten.io/k10/kio/kopia.CreateKopiaRepository\\\",\\\"linenumber\\\":472,\\\"file\\\":\\\"kasten.io/k10/kio/kopia/repository.go:472\\\",\\\"cause\\\":{\\\"message\\\":\\\"Failed to exec command in pod: command terminated with exit code 255\\\"}},{\\\"message\\\":\\\"Failed to connect to the backup repository\\\",\\\"function\\\":\\\"kasten.io/k10/kio/kopia.ConnectToKopiaRepository\\\",\\\"linenumber\\\":558,\\\"file\\\":\\\"kasten.io/k10/kio/kopia/repository.go:558\\\",\\\"cause\\\":{\\\"message\\\":\\\"Failed to exec command in pod: command terminated with exit code 255\\\"}}]}}\"}
To continue using the Generic Storage Backup feature on OCP 4.11 and higher and to resolve the error shown above, security context constraints(SCC) capabilities need to be added manually to the container spec as shown below securityContext: capabilities: add: ["CAP_CHOWN", "CAP_DAC_OVERRIDE", "CAP_FOWNER"] If container spec changes are not permitted, update the allowedCapabilities field in SCC as shown below allowedCapabilities: - CHOWN - DAC_OVERRIDE - FOWNER Note: Backups will be unavailable until the changes are completed
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