First version of admin API (#298)

**Spec:**

- [x] Start writing
- [x] Specify all layout endpoints
- [x] Specify all endpoints for operations on keys
- [x] Specify all endpoints for operations on key/bucket permissions
- [x] Specify all endpoints for operations on buckets
- [x] Specify all endpoints for operations on bucket aliases

View rendered spec at <https://git.deuxfleurs.fr/Deuxfleurs/garage/src/branch/admin-api/doc/drafts/admin-api.md>

**Code:**

- [x] Refactor code for admin api to use common api code that was created for K2V

**General endpoints:**

- [x] Metrics
- [x] GetClusterStatus
- [x] ConnectClusterNodes
- [x] GetClusterLayout
- [x] UpdateClusterLayout
- [x] ApplyClusterLayout
- [x] RevertClusterLayout

**Key-related endpoints:**

- [x] ListKeys
- [x] CreateKey
- [x] ImportKey
- [x] GetKeyInfo
- [x] UpdateKey
- [x] DeleteKey

**Bucket-related endpoints:**

- [x] ListBuckets
- [x] CreateBucket
- [x] GetBucketInfo
- [x] DeleteBucket
- [x] PutBucketWebsite
- [x] DeleteBucketWebsite

**Operations on key/bucket permissions:**

- [x] BucketAllowKey
- [x] BucketDenyKey

**Operations on bucket aliases:**

- [x] GlobalAliasBucket
- [x] GlobalUnaliasBucket
- [x] LocalAliasBucket
- [x] LocalUnaliasBucket

**And also:**

- [x] Separate error type for the admin API (this PR includes a quite big refactoring of error handling)
- [x] Add management of website access
- [ ] Check that nothing is missing wrt what can be done using the CLI
- [ ] Improve formatting of the spec
- [x] Make sure everyone is cool with the API design

Fix #231
Fix #295

Co-authored-by: Alex Auvolat <alex@adnab.me>
Reviewed-on: https://git.deuxfleurs.fr/Deuxfleurs/garage/pulls/298
Co-authored-by: Alex <alex@adnab.me>
Co-committed-by: Alex <alex@adnab.me>

1 files changed, 0 insertions, 37 deletions

diff --git a/src/admin/tracing_setup.rs b/src/admin/tracing_setup.rs
deleted file mode 100644
index 55fc4094..00000000
--- a/src/admin/tracing_setup.rs
+++ /dev/null
@@ -1,37 +0,0 @@
-use std::time::Duration;
-
-use opentelemetry::sdk::{
-	trace::{self, IdGenerator, Sampler},
-	Resource,
-};
-use opentelemetry::KeyValue;
-use opentelemetry_otlp::WithExportConfig;
-
-use garage_util::data::*;
-use garage_util::error::*;
-
-pub fn init_tracing(export_to: &str, node_id: Uuid) -> Result<(), Error> {
-	let node_id = hex::encode(&node_id.as_slice()[..8]);
-
-	opentelemetry_otlp::new_pipeline()
-		.tracing()
-		.with_exporter(
-			opentelemetry_otlp::new_exporter()
-				.tonic()
-				.with_endpoint(export_to)
-				.with_timeout(Duration::from_secs(3)),
-		)
-		.with_trace_config(
-			trace::config()
-				.with_id_generator(IdGenerator::default())
-				.with_sampler(Sampler::AlwaysOn)
-				.with_resource(Resource::new(vec![
-					KeyValue::new("service.name", "garage"),
-					KeyValue::new("service.instance.id", node_id),
-				])),
-		)
-		.install_batch(opentelemetry::runtime::Tokio)
-		.ok_or_message("Unable to initialize tracing")?;
-
-	Ok(())
-}