mirror of
https://git.deuxfleurs.fr/Deuxfleurs/garage.git
synced 2024-11-14 04:01:25 +00:00
72 lines
4.2 KiB
Markdown
72 lines
4.2 KiB
Markdown
+++
|
|
title = "Migrating from 0.8 to 0.9"
|
|
weight = 12
|
|
+++
|
|
|
|
**This guide explains how to migrate to 0.9 if you have an existing 0.8 cluster.
|
|
We don't recommend trying to migrate to 0.9 directly from 0.7 or older.**
|
|
|
|
This migration procedure has been tested on several clusters without issues.
|
|
However, it is still a *critical procedure* that might cause issues.
|
|
**Make sure to back up all your data before attempting it!**
|
|
|
|
You might also want to read our [general documentation on upgrading Garage](@/documentation/operations/upgrading.md).
|
|
|
|
The following are **breaking changes** in Garage v0.9 that require your attention when migrating:
|
|
|
|
- LMDB is now the default metadata db engine and Sled is deprecated. If you were using Sled, make sure to specify `db_engine = "sled"` in your configuration file, or take the time to [convert your database](https://garagehq.deuxfleurs.fr/documentation/reference-manual/configuration/#db-engine-since-v0-8-0).
|
|
|
|
- Capacity values are now in actual byte units. The translation from the old layout will assign 1 capacity = 1Gb by default, which might be wrong for your cluster. This does not cause any data to be moved around, but you might want to re-assign correct capacity values post-migration.
|
|
|
|
- Multipart uploads that were started in Garage v0.8 will not be visible in Garage v0.9 and will have to be restarted from scratch.
|
|
|
|
- Changes to the admin API: some `v0/` endpoints have been replaced by `v1/` counterparts with updated/uniformized syntax. All other endpoints have also moved to `v1/` by default, without syntax changes, but are still available under `v0/` for compatibility.
|
|
|
|
|
|
## Simple migration procedure (takes cluster offline for a while)
|
|
|
|
The migration steps are as follows:
|
|
|
|
1. Disable API and web access. You may do this by stopping your reverse proxy or by commenting out
|
|
the `api_bind_addr` values in your `config.toml` file and restarting Garage.
|
|
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 (`versions`, `block_refs`, etc.)
|
|
3. Check that the block resync queue and Merkle queue are empty:
|
|
run `garage stats -a` to query them or inspect metrics in the Grafana dashboard.
|
|
4. Turn off Garage v0.8
|
|
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-v0.8.tar.zst meta/`
|
|
6. Install Garage v0.9
|
|
7. Update your configuration file if necessary.
|
|
8. Turn on Garage v0.9
|
|
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.
|
|
12. You might want to assign correct capacity values to all your nodes. Doing so might cause data to be moved
|
|
in your cluster, which should also be monitored carefully.
|
|
|
|
## Minimal downtime migration procedure
|
|
|
|
The migration to Garage v0.9 can be done with almost no downtime,
|
|
by restarting all nodes at once in the new version.
|
|
|
|
The migration steps are as follows:
|
|
|
|
1. 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 (`versions`, `block_refs`, etc.)
|
|
|
|
2. Turn off each node individually; back up its metadata folder (see above); turn it back on again.
|
|
This will allow you to take a backup of all nodes without impacting global cluster availability.
|
|
You can do all nodes of a single zone at once as this does not impact the availability of Garage.
|
|
|
|
3. Prepare your binaries and configuration files for Garage v0.9
|
|
|
|
4. Shut down all v0.8 nodes simultaneously, and restart them all simultaneously in v0.9.
|
|
Use your favorite deployment tool (Ansible, Kubernetes, Nomad) to achieve this as fast as possible.
|
|
Garage v0.9 should be in a working state as soon as it starts.
|
|
|
|
5. Proceed with repair and monitoring as described in steps 9-12 above.
|