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diff --git a/doc/book/working-documents/migration-08.md b/doc/book/working-documents/migration-08.md new file mode 100644 index 00000000..5f97c45b --- /dev/null +++ b/doc/book/working-documents/migration-08.md @@ -0,0 +1,34 @@ ++++ +title = "Migrating from 0.7 to 0.8" +weight = 13 ++++ + +**This guide explains how to migrate to 0.8 if you have an existing 0.7 cluster. +We don't recommend trying to migrate to 0.8 directly from 0.6 or older.** + +**We make no guarantee that this migration will work perfectly: +back up all your data before attempting it!** + +Garage v0.8 introduces new data tables that allow the counting of objects in buckets in order to implement bucket quotas. +A manual migration step is required to first count objects in Garage buckets and populate these tables with accurate data. + +The migration steps are as follows: + +1. Disable API and web access. Garage v0.7 does not support disabling + these endpoints but you can change the port number or stop your reverse proxy for instance. +2. Do `garage repair --all-nodes --yes tables` and `garage repair --all-nodes --yes blocks`, + check the logs and check that all data seems to be synced correctly between + nodes. If you have time, do additional checks (`scrub`, `block_refs`, etc.) +3. Check that queues are empty: run `garage stats` to query them or inspect metrics in the Grafana dashboard. +4. Turn off Garage v0.7 +5. **Backup the metadata folder of all your nodes!** For instance, use the following command + if your metadata directory is `/var/lib/garage/meta`: `cd /var/lib/garage ; tar -acf meta-v0.7.tar.zst meta/` +6. Install Garage v0.8 +7. **Before starting Garage v0.8**, run the offline migration step: `garage offline-repair --yes object_counters`. + This can take a while to run, depending on the number of objects stored in your cluster. +8. Turn on Garage v0.8 +9. Do `garage repair --all-nodes --yes tables` and `garage repair --all-nodes --yes blocks`. + Wait for a full table sync to run. +10. Your upgraded cluster should be in a working state. Re-enable API and Web + access and check that everything went well. +11. Monitor your cluster in the next hours to see if it works well under your production load, report any issue. |