fix(loki sink): update to use the global list of compression algorith…

…ms (vectordotdev#19099) * Update to use the global list of compression algorithms Signed-off-by: Stephen Wakely <fungus.humungus@gmail.com> * Mention snappy compression using protocol buffers Signed-off-by: Stephen Wakely <fungus.humungus@gmail.com> * Snappy is compressed separately Signed-off-by: Stephen Wakely <fungus.humungus@gmail.com> * Rely on framework compression for Snappy Signed-off-by: Stephen Wakely <fungus.humungus@gmail.com> * Update encoder test Signed-off-by: Stephen Wakely <fungus.humungus@gmail.com> --------- Signed-off-by: Stephen Wakely <fungus.humungus@gmail.com>
aholmberg · Nov 15, 2023 · 218963a · 218963a
1 parent a59329a
commit 218963a
Show file tree

Hide file tree

Showing 5 changed files with 25 additions and 66 deletions.
diff --git a/lib/loki-logproto/src/lib.rs b/lib/loki-logproto/src/lib.rs
@@ -54,9 +54,7 @@ pub mod util {
             let streams: Vec<logproto::StreamAdapter> =
                 self.0.into_iter().map(|stream| stream.into()).collect();
             let push_request = logproto::PushRequest { streams };
-            let buf = push_request.encode_to_vec();
-            let mut encoder = snap::raw::Encoder::new();
-            encoder.compress_vec(&buf).expect("out of memory")
+            push_request.encode_to_vec()
         }
     }
 
@@ -121,10 +119,10 @@ mod tests {
         let batch = Batch(vec![Stream(labels, vec![entry1, entry2])]);
         // generated by test codes from promtail
         let expect = vec![
-            62, 176, 10, 60, 10, 24, 123, 115, 111, 117, 114, 99, 101, 61, 34, 112, 114, 111, 116,
-            111, 98, 117, 102, 45, 116, 101, 115, 116, 34, 125, 18, 15, 10, 6, 8, 182, 204, 144,
-            142, 6, 18, 5, 104, 101, 108, 108, 111, 5, 17, 44, 183, 204, 144, 142, 6, 18, 5, 119,
-            111, 114, 108, 100,
+            10, 60, 10, 24, 123, 115, 111, 117, 114, 99, 101, 61, 34, 112, 114, 111, 116, 111, 98,
+            117, 102, 45, 116, 101, 115, 116, 34, 125, 18, 15, 10, 6, 8, 182, 204, 144, 142, 6, 18,
+            5, 104, 101, 108, 108, 111, 18, 15, 10, 6, 8, 183, 204, 144, 142, 6, 18, 5, 119, 111,
+            114, 108, 100,
         ];
         let buf = batch.encode();
         assert_eq!(expect, buf);

diff --git a/src/sinks/loki/config.rs b/src/sinks/loki/config.rs
@@ -9,42 +9,8 @@ use crate::{
     sinks::{prelude::*, util::UriSerde},
 };
 
-/// Loki-specific compression.
-#[configurable_component]
-#[derive(Debug, Copy, Clone, Eq, PartialEq)]
-pub enum ExtendedCompression {
-    /// Snappy compression.
-    ///
-    /// This implies sending push requests as Protocol Buffers.
-    #[serde(rename = "snappy")]
-    Snappy,
-}
-
-/// Compression configuration.
-#[configurable_component]
-#[derive(Debug, Copy, Clone, Eq, PartialEq)]
-#[serde(untagged)]
-pub enum CompressionConfigAdapter {
-    /// Basic compression.
-    Original(Compression),
-
-    /// Loki-specific compression.
-    Extended(ExtendedCompression),
-}
-
-impl CompressionConfigAdapter {
-    pub const fn content_encoding(self) -> Option<&'static str> {
-        match self {
-            CompressionConfigAdapter::Original(compression) => compression.content_encoding(),
-            CompressionConfigAdapter::Extended(_) => Some("snappy"),
-        }
-    }
-}
-
-impl Default for CompressionConfigAdapter {
-    fn default() -> Self {
-        CompressionConfigAdapter::Extended(ExtendedCompression::Snappy)
-    }
+const fn default_compression() -> Compression {
+    Compression::Snappy
 }
 
 fn default_loki_path() -> String {
@@ -106,9 +72,10 @@ pub struct LokiConfig {
     #[serde(default = "crate::serde::default_true")]
     pub remove_timestamp: bool,
 
-    #[configurable(derived)]
-    #[serde(default)]
-    pub compression: CompressionConfigAdapter,
+    /// Compression configuration.
+    /// Snappy compression implies sending push requests as Protocol Buffers.
+    #[serde(default = "default_compression")]
+    pub compression: Compression,
 
     #[configurable(derived)]
     #[serde(default)]

diff --git a/src/sinks/loki/service.rs b/src/sinks/loki/service.rs
@@ -5,7 +5,6 @@ use http::StatusCode;
 use snafu::Snafu;
 use tracing::Instrument;
 
-use crate::sinks::loki::config::{CompressionConfigAdapter, ExtendedCompression};
 use crate::{
     http::{Auth, HttpClient},
     sinks::{prelude::*, util::UriSerde},
@@ -60,7 +59,7 @@ impl DriverResponse for LokiResponse {
 
 #[derive(Clone)]
 pub struct LokiRequest {
-    pub compression: CompressionConfigAdapter,
+    pub compression: Compression,
     pub finalizers: EventFinalizers,
     pub payload: Bytes,
     pub tenant_id: Option<String>,
@@ -113,10 +112,8 @@ impl Service<LokiRequest> for LokiService {
 
     fn call(&mut self, request: LokiRequest) -> Self::Future {
         let content_type = match request.compression {
-            CompressionConfigAdapter::Original(_) => "application/json",
-            CompressionConfigAdapter::Extended(ExtendedCompression::Snappy) => {
-                "application/x-protobuf"
-            }
+            Compression::Snappy => "application/x-protobuf",
+            _ => "application/json",
         };
         let mut req = http::Request::post(&self.endpoint.uri).header("Content-Type", content_type);
 

diff --git a/src/sinks/loki/sink.rs b/src/sinks/loki/sink.rs
@@ -12,7 +12,6 @@ use super::{
     event::{LokiBatchEncoder, LokiEvent, LokiRecord, PartitionKey},
     service::{LokiRequest, LokiRetryLogic, LokiService},
 };
-use crate::sinks::loki::config::{CompressionConfigAdapter, ExtendedCompression};
 use crate::sinks::loki::event::LokiBatchEncoding;
 use crate::{
     http::{get_http_scheme_from_uri, HttpClient},
@@ -65,7 +64,7 @@ impl Partitioner for RecordPartitioner {
 
 #[derive(Clone)]
 pub struct LokiRequestBuilder {
-    compression: CompressionConfigAdapter,
+    compression: Compression,
     encoder: LokiBatchEncoder,
 }
 
@@ -92,10 +91,7 @@ impl RequestBuilder<(PartitionKey, Vec<LokiRecord>)> for LokiRequestBuilder {
     type Error = RequestBuildError;
 
     fn compression(&self) -> Compression {
-        match self.compression {
-            CompressionConfigAdapter::Original(compression) => compression,
-            CompressionConfigAdapter::Extended(_) => Compression::None,
-        }
+        self.compression
     }
 
     fn encoder(&self) -> &Self::Encoder {
@@ -415,10 +411,8 @@ impl LokiSink {
         let serializer = config.encoding.build()?;
         let encoder = Encoder::<()>::new(serializer);
         let batch_encoder = match config.compression {
-            CompressionConfigAdapter::Original(_) => LokiBatchEncoder(LokiBatchEncoding::Json),
-            CompressionConfigAdapter::Extended(ExtendedCompression::Snappy) => {
-                LokiBatchEncoder(LokiBatchEncoding::Protobuf)
-            }
+            Compression::Snappy => LokiBatchEncoder(LokiBatchEncoding::Protobuf),
+            _ => LokiBatchEncoder(LokiBatchEncoding::Json),
         };
 
         Ok(Self {

diff --git a/website/cue/reference/components/sinks/base/loki.cue b/website/cue/reference/components/sinks/base/loki.cue
@@ -110,8 +110,11 @@ base: components: sinks: loki: configuration: {
 		}
 	}
 	compression: {
-		description: "Compression configuration."
-		required:    false
+		description: """
+			Compression configuration.
+			Snappy compression implies sending push requests as Protocol Buffers.
+			"""
+		required: false
 		type: string: {
 			default: "snappy"
 			enum: {
@@ -122,9 +125,9 @@ base: components: sinks: loki: configuration: {
 					"""
 				none: "No compression."
 				snappy: """
-					Snappy compression.
+					[Snappy][snappy] compression.
 
-					This implies sending push requests as Protocol Buffers.
+					[snappy]: https://github.com/google/snappy/blob/main/docs/README.md
 					"""
 				zlib: """
 					[Zlib][zlib] compression.