balancerd: initial working balancer process

This is not yet ready for production. The code here should be enough to
allow cloud to start testing.

Working:

- pgwire with no tls
- pgwire with tls
- static resolver (no frontegg) for local dev
- frontegg resolver

Not implemented:

- https
- metrics
- memory constraints

See #21843

Cargo.toml

@@ -7,6 +7,7 @@ members = [
     "src/avro-derive",
     "src/aws-s3-util",
     "src/aws-secrets-controller",
+    "src/balancerd",
     "src/build-id",
     "src/build-info",
     "src/ccsr",

misc/images/balancerd/Dockerfile

@@ -0,0 +1,17 @@
+# Copyright Materialize, Inc. and contributors. All rights reserved.
+#
+# Use of this software is governed by the Business Source License
+# included in the LICENSE file at the root of this repository.
+#
+# As of the Change Date specified in that file, in accordance with
+# the Business Source License, use of this software will be governed
+# by the Apache License, Version 2.0.
+
+MZFROM ubuntu-base
+
+RUN apt-get update \
+    && apt-get -qy install ca-certificates
+
+COPY mz-balancerd /usr/local/bin/balancerd
+
+ENTRYPOINT ["balancerd"]

misc/images/balancerd/mzbuild.yml

@@ -0,0 +1,15 @@
+# Copyright Materialize, Inc. and contributors. All rights reserved.
+#
+# Use of this software is governed by the Business Source License
+# included in the LICENSE file at the root of this repository.
+#
+# As of the Change Date specified in that file, in accordance with
+# the Business Source License, use of this software will be governed
+# by the Apache License, Version 2.0.
+
+name: balancerd
+description: Ingress balancer.
+pre-image:
+  - type: cargo-build
+    bin: [mz-balancerd]
+    strip: false

src/balancerd/Cargo.toml

@@ -0,0 +1,38 @@
+[package]
+name = "mz-balancerd"
+description = "Balancer service."
+version = "0.0.0"
+edition.workspace = true
+rust-version.workspace = true
+publish = false
+
+[dependencies]
+anyhow = { version = "1.0.66", features = ["backtrace"] }
+async-trait = "0.1.68"
+bytes = "1.3.0"
+bytesize = "1.1.0"
+clap = { version = "3.2.24", features = ["derive", "env"] }
+futures = "0.3.25"
+jsonwebtoken = "8.2.0"
+mz-build-info = { path = "../build-info" }
+mz-frontegg-auth = { path = "../frontegg-auth" }
+mz-orchestrator-tracing = { path = "../orchestrator-tracing" }
+mz-ore = { path = "../ore", features = ["server"] }
+mz-pgwire-common = { path = "../pgwire-common" }
+num_cpus = "1.14.0"
+openssl = { version = "0.10.48", features = ["vendored"] }
+semver = "1.0.16"
+tokio = { version = "1.24.2", default-features = false }
+tokio-openssl = "0.6.3"
+tokio-postgres = { version = "0.7.8" }
+tokio-util = { version = "0.7.4", features = ["codec"] }
+tracing = "0.1.37"
+uuid = "1.2.2"
+workspace-hack = { version = "0.0.0", path = "../workspace-hack" }
+
+[features]
+default = ["tokio-console"]
+tokio-console = ["mz-ore/tokio-console"]
+
+[package.metadata.cargo-udeps.ignore]
+normal = ["workspace-hack"]