Simplify our README
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Quentin Dufour
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README.md
117
README.md
@ -18,119 +18,4 @@ Non-goals include:
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Our main use case is to provide a distributed storage layer for small-scale self hosted services such as [Deuxfleurs](https://deuxfleurs.fr).
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Check our [compatibility page](doc/Compatibility.md) to view details of the S3 API compatibility.
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## Development
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We propose the following quickstart to setup a full dev. environment as quickly as possible:
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1. Setup a rust/cargo environment. eg. `dnf install rust cargo`
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2. Install awscli v2 by following the guide [here](https://docs.aws.amazon.com/cli/latest/userguide/install-cliv2.html).
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3. Run `cargo build` to build the project
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4. Run `./script/dev-cluster.sh` to launch a test cluster (feel free to read the script)
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5. Run `./script/dev-configure.sh` to configure your test cluster with default values (same datacenter, 100 tokens)
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6. Run `./script/dev-bucket.sh` to create a bucket named `eprouvette` and an API key that will be stored in `/tmp/garage.s3`
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7. Run `source ./script/dev-env-aws.sh` to configure your CLI environment
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8. You can use `garage` to manage the cluster. Try `garage --help`.
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9. You can use the `awsgrg` alias to add, remove, and delete files. Try `awsgrg help`, `awsgrg cp /proc/cpuinfo s3://eprouvette/cpuinfo.txt`, or `awsgrg ls s3://eprouvette`. `awsgrg` is a wrapper on the `aws s3` command pre-configured with the previously generated API key (the one in `/tmp/garage.s3`) and localhost as the endpoint.
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Now you should be ready to start hacking on garage!
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## S3 compatibility
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Only a subset of S3 is supported: adding, listing, getting and deleting files in a bucket.
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Bucket management, ACL and other advanced features are not (yet?) handled through the S3 API but through the `garage` CLI.
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We primarily test `garage` against the `awscli` tool and `nextcloud`.
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## Setting up Garage
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Use the `genkeys.sh` script to generate TLS keys for encrypting communications between Garage nodes.
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The script takes no arguments and will generate keys in `pki/`.
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This script creates a certificate authority `garage-ca` which signs certificates for individual Garage nodes.
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Garage nodes from a same cluster authenticate themselves by verifying that they have certificates signed by the same certificate authority.
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Garage requires two locations to store its data: a metadata directory, and a data directory.
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The metadata directory is used to store metadata such as object lists, and should ideally be located on an SSD drive.
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The data directory is used to store the chunks of data of the objects stored in Garage.
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In a typical deployment the data directory is stored on a standard HDD.
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Garage does not handle TLS for its S3 API endpoint. This should be handled by adding a reverse proxy.
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Create a configuration file with the following structure:
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```
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block_size = 1048576 # objects are split in blocks of maximum this number of bytes
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metadata_dir = "/path/to/ssd/metadata/directory"
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data_dir = "/path/to/hdd/data/directory"
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rpc_bind_addr = "[::]:3901" # the port other Garage nodes will use to talk to this node
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bootstrap_peers = [
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# Ideally this list should contain the IP addresses of all other Garage nodes of the cluster.
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# Use Ansible or any kind of configuration templating to generate this automatically.
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"10.0.0.1:3901",
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"10.0.0.2:3901",
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"10.0.0.3:3901",
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]
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# optionnal: garage can find cluster nodes automatically using a Consul server
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# garage only does lookup but does not register itself, registration should be handled externally by e.g. Nomad
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consul_host = "localhost:8500" # optionnal: host name of a Consul server for automatic peer discovery
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consul_service_name = "garage" # optionnal: service name to look up on Consul
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max_concurrent_rpc_requests = 12
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data_replication_factor = 3
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meta_replication_factor = 3
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meta_epidemic_fanout = 3
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[rpc_tls]
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# NOT RECOMMENDED: you can skip this section if you don't want to encrypt intra-cluster traffic
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# Thanks to genkeys.sh, generating the keys and certificates is easy, so there is NO REASON NOT TO DO IT.
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ca_cert = "/path/to/garage/pki/garage-ca.crt"
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node_cert = "/path/to/garage/pki/garage.crt"
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node_key = "/path/to/garage/pki/garage.key"
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[s3_api]
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api_bind_addr = "[::1]:3900" # the S3 API port, HTTP without TLS. Add a reverse proxy for the TLS part.
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s3_region = "garage" # set this to anything. S3 API calls will fail if they are not made against the region set here.
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[s3_web]
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bind_addr = "[::1]:3902"
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root_domain = ".garage.tld"
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index = "index.html"
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```
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Build Garage using `cargo build --release`.
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Then, run it using either `./target/release/garage server -c path/to/config_file.toml` or `cargo run --release -- server -c path/to/config_file.toml`.
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Set the `RUST_LOG` environment to `garage=debug` to dump some debug information.
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Set it to `garage=trace` to dump even more debug information.
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Set it to `garage=warn` to show nothing except warnings and errors.
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## Setting up cluster nodes
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Once all your `garage` nodes are running, you will need to:
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1. check that they are correctly talking to one another;
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2. configure them with their physical location (in the case of a multi-dc deployment) and a number of "ring tokens" proportionnal to the storage space available on each node;
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3. create some S3 API keys and buckets;
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4. ???;
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5. profit!
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To run these administrative tasks, you will need to use the `garage` command line tool and it to connect to any of the cluster's nodes on the RPC port.
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The `garage` CLI also needs TLS keys and certificates of its own to authenticate and be authenticated in the cluster.
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A typicall invocation will be as follows:
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```
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./target/release/garage --ca-cert=pki/garage-ca.crt --client-cert=pki/garage-client.crt --client-key=pki/garage-client.key <...>
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```
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## Notes to self
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### What to repair
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- `tables`: to do a full sync of metadata, should not be necessary because it is done every hour by the system
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- `versions` and `block_refs`: very time consuming, usefull if deletions have not been propagated, improves garbage collection
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- `blocks`: very usefull to resync/rebalance blocks betweeen nodes
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**[Go to the documentation](https://garagehq.deuxfleurs.fr)**
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@ -1,140 +0,0 @@
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# Quickstart on an existing deployment
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First, chances are that your garage deployment is secured by TLS.
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All your commands must be prefixed with their certificates.
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I will define an alias once and for all to ease future commands.
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Please adapt the path of the binary and certificates to your installation!
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```
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alias grg="/garage/garage --ca-cert /secrets/garage-ca.crt --client-cert /secrets/garage.crt --client-key /secrets/garage.key"
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```
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Now we can check that everything is going well by checking our cluster status:
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```
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grg status
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```
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Don't forget that `help` command and `--help` subcommands can help you anywhere, the CLI tool is self-documented! Two examples:
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```
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grg help
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grg bucket allow --help
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```
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Fine, now let's create a bucket (we imagine that you want to deploy nextcloud):
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```
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grg bucket create nextcloud-bucket
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```
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Check that everything went well:
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```
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grg bucket list
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grg bucket info nextcloud-bucket
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```
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Now we will generate an API key to access this bucket.
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Note that API keys are independent of buckets: one key can access multiple buckets, multiple keys can access one bucket.
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Now, let's start by creating a key only for our PHP application:
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```
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grg key new --name nextcloud-app-key
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```
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You will have the following output (this one is fake, `key_id` and `secret_key` were generated with the openssl CLI tool):
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```
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Key { key_id: "GK3515373e4c851ebaad366558", secret_key: "7d37d093435a41f2aab8f13c19ba067d9776c90215f56614adad6ece597dbb34", name: "nextcloud-app-key", name_timestamp: 1603280506694, deleted: false, authorized_buckets: [] }
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```
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Check that everything works as intended (be careful, info works only with your key identifier and not with its friendly name!):
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```
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grg key list
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grg key info GK3515373e4c851ebaad366558
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```
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Now that we have a bucket and a key, we need to give permissions to the key on the bucket!
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```
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grg bucket allow --read --write nextcloud-bucket --key GK3515373e4c851ebaad366558
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```
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You can check at any times allowed keys on your bucket with:
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```
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grg bucket info nextcloud-bucket
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```
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Now, let's move to the S3 API!
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We will use the `s3cmd` CLI tool.
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You can install it via your favorite package manager.
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Otherwise, check [their website](https://s3tools.org/s3cmd)
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We will configure `s3cmd` with its interactive configuration tool, be careful not all endpoints are implemented!
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Especially, the test run at the end does not work (yet).
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```
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$ s3cmd --configure
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Enter new values or accept defaults in brackets with Enter.
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Refer to user manual for detailed description of all options.
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Access key and Secret key are your identifiers for Amazon S3. Leave them empty for using the env variables.
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Access Key: GK3515373e4c851ebaad366558
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Secret Key: 7d37d093435a41f2aab8f13c19ba067d9776c90215f56614adad6ece597dbb34
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Default Region [US]: garage
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Use "s3.amazonaws.com" for S3 Endpoint and not modify it to the target Amazon S3.
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S3 Endpoint [s3.amazonaws.com]: garage.deuxfleurs.fr
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Use "%(bucket)s.s3.amazonaws.com" to the target Amazon S3. "%(bucket)s" and "%(location)s" vars can be used
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if the target S3 system supports dns based buckets.
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DNS-style bucket+hostname:port template for accessing a bucket [%(bucket)s.s3.amazonaws.com]: garage.deuxfleurs.fr
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Encryption password is used to protect your files from reading
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by unauthorized persons while in transfer to S3
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Encryption password:
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Path to GPG program [/usr/bin/gpg]:
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When using secure HTTPS protocol all communication with Amazon S3
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servers is protected from 3rd party eavesdropping. This method is
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slower than plain HTTP, and can only be proxied with Python 2.7 or newer
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Use HTTPS protocol [Yes]:
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On some networks all internet access must go through a HTTP proxy.
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Try setting it here if you can't connect to S3 directly
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HTTP Proxy server name:
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New settings:
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Access Key: GK3515373e4c851ebaad366558
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Secret Key: 7d37d093435a41f2aab8f13c19ba067d9776c90215f56614adad6ece597dbb34
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Default Region: garage
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S3 Endpoint: garage.deuxfleurs.fr
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DNS-style bucket+hostname:port template for accessing a bucket: garage.deuxfleurs.fr
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Encryption password:
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Path to GPG program: /usr/bin/gpg
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Use HTTPS protocol: True
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HTTP Proxy server name:
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HTTP Proxy server port: 0
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Test access with supplied credentials? [Y/n] n
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Save settings? [y/N] y
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Configuration saved to '/home/quentin/.s3cfg'
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```
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Now, if everything works, the following commands should work:
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```
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echo hello world > hello.txt
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s3cmd put hello.txt s3://nextcloud-bucket
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s3cmd ls s3://nextcloud-bucket
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s3cmd rm s3://nextcloud-bucket/hello.txt
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```
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That's all for now!
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@ -5,6 +5,7 @@
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- [Getting Started](./getting_started/index.md)
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- [Get a binary](./getting_started/binary.md)
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- [Configure the daemon](./getting_started/daemon.md)
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- [Control the daemon](./getting_started/control.md)
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- [Configure a cluster](./getting_started/cluster.md)
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- [Create buckets and keys](./getting_started/bucket.md)
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- [Handle files](./getting_started/files.md)
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@ -1 +1,14 @@
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# Configure a cluster
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## Test cluster
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## Real-world cluster
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For our example, we will suppose we have the following infrastructure:
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| Location | Name | IP Address | Disk Space |
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|----------|---------|------------|------------|
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| Paris | Mercury | fc00:1::1 | 1 To |
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| Paris | Venus | fc00:1::2 | 2 To |
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| London | Earth | fc00:1::2 | 2 To |
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| Brussels | Mars | fc00:B::1 | 1.5 To |
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