41 lines
1.5 KiB
Markdown
41 lines
1.5 KiB
Markdown
# Longhorn distributed block storage system
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## For users
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You should really avoid using Longhorn as it has over time proven to be
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unreliable system. Prefer using remote databases in your application via
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the Kubernetes operator pattern.
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Use Longhorn for applications that need persistent storage, but are unable
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to provide replication in the application layer:
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* Applications that insist writing into filesystem
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* Applications that serve Git repositories (eg Gitea)
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* Applications that check out Git repositories (eg Woodpecker, Drone and CI systems)
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* Applications that need to use SQLite
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Instead of using built-in `longhorn` storage class, please add new storage class
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with suitable replication, data locality parameters and reclaim policy
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[https://git.k-space.ee/k-space/kube/src/branch/master/storage-class.yaml](here)
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Longhorn backups are made once per day and it's configured to be uploaded to
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the Minio S3 bucket hosted at nas.k-space.ee
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## For administrators
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Longhorn was last upgraded with following snippet:
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```
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wget https://raw.githubusercontent.com/longhorn/longhorn/v1.6.2/deploy/longhorn.yaml
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patch -p0 < changes.diff
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kubectl -n longhorn-system apply -f longhorn.yml -f application-extras.yml -f backup.yaml
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```
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After initial deployment `dedicated=storage:NoSchedule` was specified
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for `Kubernetes Taint Toleration` under `Setting -> General` on
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[Longhorn Dashboard](https://longhorn.k-space.ee/).
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Suitable nodes were tagged with `storage` and Longhorn scheduling was disabled on others.
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Refer to `application.yaml` to see how backups are configured.
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