Allow for custom transforms via using shotover as a crate (#1101)

Cargo.toml

@@ -4,6 +4,7 @@ members = [
  "shotover-proxy",
  "test-helpers",
  "tokio-bin-process",
+ "custom-transforms-example",
 ]
 
 # https://deterministic.space/high-performance-rust.html
@@ -46,3 +47,5 @@ hex-literal = "0.3.3"
 rand = "0.8.4"
 rand_distr = "0.4.1"
 clap = { version = "4.0.4", features = ["cargo", "derive"] }
+async-trait = "0.1.30"
+typetag = "0.2.5"

custom-transforms-example/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+name = "custom-transforms-example"
+version = "0.0.1"
+authors = ["Ben <ben@instaclustr.com>"]
+edition = "2021"
+license = "Apache-2.0"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+shotover = { path = "../shotover" }
+anyhow.workspace = true
+serde.workspace = true
+async-trait.workspace = true
+tracing.workspace = true
+typetag.workspace = true
+
+
+[dev-dependencies]
+test-helpers = {path = "../test-helpers"}
+tokio.workspace = true
+redis.workspace = true

custom-transforms-example/config/config.yaml

@@ -0,0 +1,3 @@
+---
+main_log_level: "info,shotover_proxy=info"
+observability_interface: "0.0.0.0:9001"

custom-transforms-example/config/docker-compose.yaml

@@ -0,0 +1,9 @@
+version: "3.3"
+services:
+ redis-one:
+ image: library/redis:5.0.9
+ ports:
+ - "1111:6379"
+ volumes:
+ - ./redis.conf:/usr/local/etc/redis/redis.conf
+ command: ["redis-server", "/usr/local/etc/redis/redis.conf"]