forked from Deuxfleurs/garage
555 lines
23 KiB
Markdown
555 lines
23 KiB
Markdown
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title = "Configuration file format"
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weight = 20
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## Full example
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Here is an example `garage.toml` configuration file that illustrates all of the possible options:
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```toml
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metadata_dir = "/var/lib/garage/meta"
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data_dir = "/var/lib/garage/data"
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metadata_fsync = true
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data_fsync = false
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db_engine = "lmdb"
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block_size = 1048576
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sled_cache_capacity = "128MiB"
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sled_flush_every_ms = 2000
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lmdb_map_size = "1T"
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replication_mode = "3"
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compression_level = 1
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rpc_secret = "4425f5c26c5e11581d3223904324dcb5b5d5dfb14e5e7f35e38c595424f5f1e6"
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rpc_bind_addr = "[::]:3901"
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rpc_public_addr = "[fc00:1::1]:3901"
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bootstrap_peers = [
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"563e1ac825ee3323aa441e72c26d1030d6d4414aeb3dd25287c531e7fc2bc95d@[fc00:1::1]:3901",
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"86f0f26ae4afbd59aaf9cfb059eefac844951efd5b8caeec0d53f4ed6c85f332[fc00:1::2]:3901",
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"681456ab91350f92242e80a531a3ec9392cb7c974f72640112f90a600d7921a4@[fc00:B::1]:3901",
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"212fd62eeaca72c122b45a7f4fa0f55e012aa5e24ac384a72a3016413fa724ff@[fc00:F::1]:3901",
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]
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[consul_discovery]
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api = "catalog"
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consul_http_addr = "http://127.0.0.1:8500"
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service_name = "garage-daemon"
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ca_cert = "/etc/consul/consul-ca.crt"
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client_cert = "/etc/consul/consul-client.crt"
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client_key = "/etc/consul/consul-key.crt"
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# for `agent` API mode, unset client_cert and client_key, and optionally enable `token`
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# token = "abcdef-01234-56789"
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tls_skip_verify = false
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tags = [ "dns-enabled" ]
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meta = { dns-acl = "allow trusted" }
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[kubernetes_discovery]
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namespace = "garage"
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service_name = "garage-daemon"
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skip_crd = false
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[s3_api]
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api_bind_addr = "[::]:3900"
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s3_region = "garage"
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root_domain = ".s3.garage"
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[s3_web]
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bind_addr = "[::]:3902"
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root_domain = ".web.garage"
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[admin]
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api_bind_addr = "0.0.0.0:3903"
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metrics_token = "cacce0b2de4bc2d9f5b5fdff551e01ac1496055aed248202d415398987e35f81"
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admin_token = "ae8cb40ea7368bbdbb6430af11cca7da833d3458a5f52086f4e805a570fb5c2a"
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trace_sink = "http://localhost:4317"
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```
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The following gives details about each available configuration option.
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## Available configuration options
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### `metadata_dir`
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The directory in which Garage will store its metadata. This contains the node identifier,
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the network configuration and the peer list, the list of buckets and keys as well
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as the index of all objects, object version and object blocks.
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Store this folder on a fast SSD drive if possible to maximize Garage's performance.
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### `data_dir`
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The directory in which Garage will store the data blocks of objects.
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This folder can be placed on an HDD. The space available for `data_dir`
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should be counted to determine a node's capacity
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when [adding it to the cluster layout](@/documentation/cookbook/real-world.md).
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Since `v0.9.0`, Garage supports multiple data directories with the following syntax:
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```toml
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data_dir = [
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{ path = "/path/to/old_data", read_only = true },
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{ path = "/path/to/new_hdd1", capacity = "2T" },
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{ path = "/path/to/new_hdd2", capacity = "4T" },
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]
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```
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See [the dedicated documentation page](@/documentation/operations/multi-hdd.md)
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on how to operate Garage in such a setup.
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### `db_engine` (since `v0.8.0`)
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Since `v0.8.0`, Garage can use alternative storage backends as follows:
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| DB engine | `db_engine` value | Database path |
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| --------- | ----------------- | ------------- |
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| [LMDB](https://www.lmdb.tech) (default since `v0.9.0`) | `"lmdb"` | `<metadata_dir>/db.lmdb/` |
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| [Sled](https://sled.rs) (default up to `v0.8.0`) | `"sled"` | `<metadata_dir>/db/` |
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| [Sqlite](https://sqlite.org) | `"sqlite"` | `<metadata_dir>/db.sqlite` |
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Sled was the only database engine up to Garage v0.7.0. Performance issues and
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API limitations of Sled prompted the addition of alternative engines in v0.8.0.
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Since v0.9.0, LMDB is the default engine instead of Sled, and Sled is
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deprecated. We plan to remove Sled in Garage v1.0.
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Performance characteristics of the different DB engines are as follows:
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- Sled: tends to produce large data files and also has performance issues,
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especially when the metadata folder is on a traditional HDD and not on SSD.
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- LMDB: the recommended database engine on 64-bit systems, much more
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space-efficient and slightly faster. Note that the data format of LMDB is not
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portable between architectures, so for instance the Garage database of an
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x86-64 node cannot be moved to an ARM64 node. Also note that, while LMDB can
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technically be used on 32-bit systems, this will limit your node to very
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small database sizes due to how LMDB works; it is therefore not recommended.
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- Sqlite: Garage supports Sqlite as an alternative storage backend for
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metadata, and although it has not been tested as much, it is expected to work
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satisfactorily. Since Garage v0.9.0, performance issues have largely been
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fixed by allowing for a no-fsync mode (see `metadata_fsync`). Sqlite does not
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have the database size limitation of LMDB on 32-bit systems.
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It is possible to convert Garage's metadata directory from one format to another
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using the `garage convert-db` command, which should be used as follows:
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```
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garage convert-db -a <input db engine> -i <input db path> \
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-b <output db engine> -o <output db path>
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```
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Make sure to specify the full database path as presented in the table above
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(third colummn), and not just the path to the metadata directory.
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### `metadata_fsync`
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Whether to enable synchronous mode for the database engine or not.
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This is disabled (`false`) by default.
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This reduces the risk of metadata corruption in case of power failures,
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at the cost of a significant drop in write performance,
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as Garage will have to pause to sync data to disk much more often
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(several times for API calls such as PutObject).
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Using this option reduces the risk of simultaneous metadata corruption on several
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cluster nodes, which could lead to data loss.
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If multi-site replication is used, this option is most likely not necessary, as
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it is extremely unlikely that two nodes in different locations will have a
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power failure at the exact same time.
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(Metadata corruption on a single node is not an issue, the corrupted data file
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can always be deleted and reconstructed from the other nodes in the cluster.)
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Here is how this option impacts the different database engines:
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| Database | `metadata_fsync = false` (default) | `metadata_fsync = true` |
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|----------|------------------------------------|-------------------------------|
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| Sled | default options | *unsupported* |
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| Sqlite | `PRAGMA synchronous = OFF` | `PRAGMA synchronous = NORMAL` |
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| LMDB | `MDB_NOMETASYNC` + `MDB_NOSYNC` | `MDB_NOMETASYNC` |
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Note that the Sqlite database is always ran in `WAL` mode (`PRAGMA journal_mode = WAL`).
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### `data_fsync`
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Whether to `fsync` data blocks and their containing directory after they are
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saved to disk.
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This is disabled (`false`) by default.
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This might reduce the risk that a data block is lost in rare
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situations such as simultaneous node losing power,
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at the cost of a moderate drop in write performance.
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Similarly to `metatada_fsync`, this is likely not necessary
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if geographical replication is used.
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### `block_size`
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Garage splits stored objects in consecutive chunks of size `block_size`
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(except the last one which might be smaller). The default size is 1MiB and
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should work in most cases. We recommend increasing it to e.g. 10MiB if
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you are using Garage to store large files and have fast network connections
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between all nodes (e.g. 1gbps).
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If you are interested in tuning this, feel free to do so (and remember to
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report your findings to us!). When this value is changed for a running Garage
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installation, only files newly uploaded will be affected. Previously uploaded
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files will remain available. This however means that chunks from existing files
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will not be deduplicated with chunks from newly uploaded files, meaning you
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might use more storage space that is optimally possible.
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### `sled_cache_capacity`
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This parameter can be used to tune the capacity of the cache used by
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[sled](https://sled.rs), the database Garage uses internally to store metadata.
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Tune this to fit the RAM you wish to make available to your Garage instance.
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This value has a conservative default (128MB) so that Garage doesn't use too much
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RAM by default, but feel free to increase this for higher performance.
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### `sled_flush_every_ms`
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This parameters can be used to tune the flushing interval of sled.
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Increase this if sled is thrashing your SSD, at the risk of losing more data in case
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of a power outage (though this should not matter much as data is replicated on other
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nodes). The default value, 2000ms, should be appropriate for most use cases.
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### `lmdb_map_size`
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This parameters can be used to set the map size used by LMDB,
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which is the size of the virtual memory region used for mapping the database file.
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The value of this parameter is the maximum size the metadata database can take.
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This value is not bound by the physical RAM size of the machine running Garage.
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If not specified, it defaults to 1GiB on 32-bit machines and 1TiB on 64-bit machines.
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### `replication_mode`
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Garage supports the following replication modes:
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- `none` or `1`: data stored on Garage is stored on a single node. There is no
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redundancy, and data will be unavailable as soon as one node fails or its
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network is disconnected. Do not use this for anything else than test
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deployments.
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- `2`: data stored on Garage will be stored on two different nodes, if possible
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in different zones. Garage tolerates one node failure, or several nodes
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failing but all in a single zone (in a deployment with at least two zones),
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before losing data. Data remains available in read-only mode when one node is
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down, but write operations will fail.
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- `2-dangerous`: a variant of mode `2`, where written objects are written to
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the second replica asynchronously. This means that Garage will return `200
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OK` to a PutObject request before the second copy is fully written (or even
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before it even starts being written). This means that data can more easily
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be lost if the node crashes before a second copy can be completed. This
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also means that written objects might not be visible immediately in read
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operations. In other words, this mode severely breaks the consistency and
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durability guarantees of standard Garage cluster operation. Benefits of
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this mode: you can still write to your cluster when one node is
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unavailable.
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- `3`: data stored on Garage will be stored on three different nodes, if
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possible each in a different zones. Garage tolerates two node failure, or
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several node failures but in no more than two zones (in a deployment with at
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least three zones), before losing data. As long as only a single node fails,
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or node failures are only in a single zone, reading and writing data to
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Garage can continue normally.
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- `3-degraded`: a variant of replication mode `3`, that lowers the read
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quorum to `1`, to allow you to read data from your cluster when several
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nodes (or nodes in several zones) are unavailable. In this mode, Garage
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does not provide read-after-write consistency anymore. The write quorum is
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still 2, ensuring that data successfully written to Garage is stored on at
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least two nodes.
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- `3-dangerous`: a variant of replication mode `3` that lowers both the read
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and write quorums to `1`, to allow you to both read and write to your
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cluster when several nodes (or nodes in several zones) are unavailable. It
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is the least consistent mode of operation proposed by Garage, and also one
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that should probably never be used.
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Note that in modes `2` and `3`,
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if at least the same number of zones are available, an arbitrary number of failures in
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any given zone is tolerated as copies of data will be spread over several zones.
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**Make sure `replication_mode` is the same in the configuration files of all nodes.
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Never run a Garage cluster where that is not the case.**
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The quorums associated with each replication mode are described below:
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| `replication_mode` | Number of replicas | Write quorum | Read quorum | Read-after-write consistency? |
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| ------------------ | ------------------ | ------------ | ----------- | ----------------------------- |
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| `none` or `1` | 1 | 1 | 1 | yes |
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| `2` | 2 | 2 | 1 | yes |
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| `2-dangerous` | 2 | 1 | 1 | NO |
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| `3` | 3 | 2 | 2 | yes |
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| `3-degraded` | 3 | 2 | 1 | NO |
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| `3-dangerous` | 3 | 1 | 1 | NO |
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Changing the `replication_mode` between modes with the same number of replicas
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(e.g. from `3` to `3-degraded`, or from `2-dangerous` to `2`), can be done easily by
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just changing the `replication_mode` parameter in your config files and restarting all your
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Garage nodes.
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It is also technically possible to change the replication mode to a mode with a
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different numbers of replicas, although it's a dangerous operation that is not
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officially supported. This requires you to delete the existing cluster layout
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and create a new layout from scratch, meaning that a full rebalancing of your
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cluster's data will be needed. To do it, shut down your cluster entirely,
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delete the `custer_layout` files in the meta directories of all your nodes,
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update all your configuration files with the new `replication_mode` parameter,
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restart your cluster, and then create a new layout with all the nodes you want
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to keep. Rebalancing data will take some time, and data might temporarily
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appear unavailable to your users. It is recommended to shut down public access
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to the cluster while rebalancing is in progress. In theory, no data should be
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lost as rebalancing is a routine operation for Garage, although we cannot
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guarantee you that everything will go right in such an extreme scenario.
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### `compression_level`
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Zstd compression level to use for storing blocks.
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Values between `1` (faster compression) and `19` (smaller file) are standard compression
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levels for zstd. From `20` to `22`, compression levels are referred as "ultra" and must be
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used with extra care as it will use lot of memory. A value of `0` will let zstd choose a
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default value (currently `3`). Finally, zstd has also compression designed to be faster
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than default compression levels, they range from `-1` (smaller file) to `-99` (faster
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compression).
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If you do not specify a `compression_level` entry, Garage will set it to `1` for you. With
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this parameters, zstd consumes low amount of cpu and should work faster than line speed in
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most situations, while saving some space and intra-cluster
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bandwidth.
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If you want to totally deactivate zstd in Garage, you can pass the special value `'none'`. No
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zstd related code will be called, your chunks will be stored on disk without any processing.
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Compression is done synchronously, setting a value too high will add latency to write queries.
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This value can be different between nodes, compression is done by the node which receive the
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API call.
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### `rpc_secret`, `rpc_secret_file` or `GARAGE_RPC_SECRET` (env)
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Garage uses a secret key, called an RPC secret, that is shared between all
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nodes of the cluster in order to identify these nodes and allow them to
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communicate together. The RPC secret is a 32-byte hex-encoded random string,
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which can be generated with a command such as `openssl rand -hex 32`.
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The RPC secret should be specified in the `rpc_secret` configuration variable.
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Since Garage `v0.8.2`, the RPC secret can also be stored in a file whose path is
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given in the configuration variable `rpc_secret_file`, or specified as an
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environment variable `GARAGE_RPC_SECRET`.
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### `rpc_bind_addr`
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The address and port on which to bind for inter-cluster communcations
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(reffered to as RPC for remote procedure calls).
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The port specified here should be the same one that other nodes will used to contact
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the node, even in the case of a NAT: the NAT should be configured to forward the external
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port number to the same internal port nubmer. This means that if you have several nodes running
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behind a NAT, they should each use a different RPC port number.
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### `rpc_public_addr`
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The address and port that other nodes need to use to contact this node for
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RPC calls. **This parameter is optional but recommended.** In case you have
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a NAT that binds the RPC port to a port that is different on your public IP,
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this field might help making it work.
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### `bootstrap_peers`
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A list of peer identifiers on which to contact other Garage peers of this cluster.
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These peer identifiers have the following syntax:
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```
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<node public key>@<node public IP or hostname>:<port>
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```
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In the case where `rpc_public_addr` is correctly specified in the
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configuration file, the full identifier of a node including IP and port can
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be obtained by running `garage node id` and then included directly in the
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`bootstrap_peers` list of other nodes. Otherwise, only the node's public
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key will be returned by `garage node id` and you will have to add the IP
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yourself.
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## The `[consul_discovery]` section
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Garage supports discovering other nodes of the cluster using Consul. For this
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to work correctly, nodes need to know their IP address by which they can be
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reached by other nodes of the cluster, which should be set in `rpc_public_addr`.
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### `consul_http_addr` and `service_name`
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The `consul_http_addr` parameter should be set to the full HTTP(S) address of the Consul server.
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### `api`
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Two APIs for service registration are supported: `catalog` and `agent`. `catalog`, the default, will register a service using
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the `/v1/catalog` endpoints, enabling mTLS if `client_cert` and `client_key` are provided. The `agent` API uses the
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`v1/agent` endpoints instead, where an optional `token` may be provided.
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### `service_name`
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`service_name` should be set to the service name under which Garage's
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RPC ports are announced.
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### `client_cert`, `client_key`
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TLS client certificate and client key to use when communicating with Consul over TLS. Both are mandatory when doing so.
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Only available when `api = "catalog"`.
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### `ca_cert`
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TLS CA certificate to use when communicating with Consul over TLS.
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### `tls_skip_verify`
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Skip server hostname verification in TLS handshake.
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`ca_cert` is ignored when this is set.
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### `token`
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Uses the provided token for communication with Consul. Only available when `api = "agent"`.
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The policy assigned to this token should at least have these rules:
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```hcl
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// the `service_name` specified above
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service "garage" {
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policy = "write"
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}
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service_prefix "" {
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policy = "read"
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}
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node_prefix "" {
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policy = "read"
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}
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```
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### `tags` and `meta`
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Additional list of tags and map of service meta to add during service registration.
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## The `[kubernetes_discovery]` section
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Garage supports discovering other nodes of the cluster using kubernetes custom
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resources. For this to work, a `[kubernetes_discovery]` section must be present
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with at least the `namespace` and `service_name` parameters.
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### `namespace`
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|
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`namespace` sets the namespace in which the custom resources are
|
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configured.
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|
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### `service_name`
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|
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`service_name` is added as a label to the advertised resources to
|
|
filter them, to allow for multiple deployments in a single namespace.
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|
|
### `skip_crd`
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|
|
|
`skip_crd` can be set to true to disable the automatic creation and
|
|
patching of the `garagenodes.deuxfleurs.fr` CRD. You will need to create the CRD
|
|
manually.
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|
|
## The `[s3_api]` section
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|
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### `api_bind_addr`
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The IP and port on which to bind for accepting S3 API calls.
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|
This endpoint does not suport TLS: a reverse proxy should be used to provide it.
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|
|
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Alternatively, since `v0.8.5`, a path can be used to create a unix socket with 0222 mode.
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|
|
### `s3_region`
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|
|
|
Garage will accept S3 API calls that are targetted to the S3 region defined here.
|
|
API calls targetted to other regions will fail with a AuthorizationHeaderMalformed error
|
|
message that redirects the client to the correct region.
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|
|
|
### `root_domain` {#root_domain}
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|
|
|
The optional suffix to access bucket using vhost-style in addition to path-style request.
|
|
Note path-style requests are always enabled, whether or not vhost-style is configured.
|
|
Configuring vhost-style S3 required a wildcard DNS entry, and possibly a wildcard TLS certificate,
|
|
but might be required by softwares not supporting path-style requests.
|
|
|
|
If `root_domain` is `s3.garage.eu`, a bucket called `my-bucket` can be interacted with
|
|
using the hostname `my-bucket.s3.garage.eu`.
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|
|
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|
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|
|
## The `[s3_web]` section
|
|
|
|
Garage allows to publish content of buckets as websites. This section configures the
|
|
behaviour of this module.
|
|
|
|
### `bind_addr`
|
|
|
|
The IP and port on which to bind for accepting HTTP requests to buckets configured
|
|
for website access.
|
|
This endpoint does not suport TLS: a reverse proxy should be used to provide it.
|
|
|
|
Alternatively, since `v0.8.5`, a path can be used to create a unix socket with 0222 mode.
|
|
|
|
### `root_domain`
|
|
|
|
The optional suffix appended to bucket names for the corresponding HTTP Host.
|
|
|
|
For instance, if `root_domain` is `web.garage.eu`, a bucket called `deuxfleurs.fr`
|
|
will be accessible either with hostname `deuxfleurs.fr.web.garage.eu`
|
|
or with hostname `deuxfleurs.fr`.
|
|
|
|
|
|
## The `[admin]` section
|
|
|
|
Garage has a few administration capabilities, in particular to allow remote monitoring. These features are detailed below.
|
|
|
|
### `api_bind_addr`
|
|
|
|
If specified, Garage will bind an HTTP server to this port and address, on
|
|
which it will listen to requests for administration features.
|
|
See [administration API reference](@/documentation/reference-manual/admin-api.md) to learn more about these features.
|
|
|
|
Alternatively, since `v0.8.5`, a path can be used to create a unix socket. Note that for security reasons,
|
|
the socket will have 0220 mode. Make sure to set user and group permissions accordingly.
|
|
|
|
### `metrics_token`, `metrics_token_file` or `GARAGE_METRICS_TOKEN` (env)
|
|
|
|
The token for accessing the Metrics endpoint. If this token is not set, the
|
|
Metrics endpoint can be accessed without access control.
|
|
|
|
You can use any random string for this value. We recommend generating a random token with `openssl rand -hex 32`.
|
|
|
|
`metrics_token` was introduced in Garage `v0.7.2`.
|
|
`metrics_token_file` and the `GARAGE_METRICS_TOKEN` environment variable are supported since Garage `v0.8.2`.
|
|
|
|
|
|
### `admin_token`, `admin_token_file` or `GARAGE_ADMIN_TOKEN` (env)
|
|
|
|
The token for accessing all of the other administration endpoints. If this
|
|
token is not set, access to these endpoints is disabled entirely.
|
|
|
|
You can use any random string for this value. We recommend generating a random token with `openssl rand -hex 32`.
|
|
|
|
`admin_token` was introduced in Garage `v0.7.2`.
|
|
`admin_token_file` and the `GARAGE_ADMIN_TOKEN` environment variable are supported since Garage `v0.8.2`.
|
|
|
|
|
|
### `trace_sink`
|
|
|
|
Optionally, the address of an OpenTelemetry collector. If specified,
|
|
Garage will send traces in the OpenTelemetry format to this endpoint. These
|
|
trace allow to inspect Garage's operation when it handles S3 API requests.
|