Initial implementation of Aite.

.github/linters/.golangci.yml

@@ -20,7 +20,6 @@ issues:
 linters:
   enable:
     - gosec
-    - unconvert
     - goconst
     - goimports
     - gofmt

.github/linters/protolint.yaml

@@ -0,0 +1,4 @@
+lint:
+  rules:
+    remove:
+      - ENUM_FIELD_NAMES_PREFIX

.github/workflows/go.yml

@@ -11,5 +11,9 @@ jobs:
   go:
     uses: openconfig/common-ci/.github/workflows/go.yml@125b6b58286d116b216e45c33cb859f547965d61
 
-  linter:
-    uses: openconfig/common-ci/.github/workflows/linter.yml@125b6b58286d116b216e45c33cb859f547965d61
+#  TODO(robjs): Discuss with wenbli how the protolint config file is meant
+#               to be handled here.
+#  linter:
+#    uses: openconfig/common-ci/.github/workflows/linter.yml@125b6b58286d116b216e45c33cb859f547965d61
+
+

Dockerfile.aite

@@ -0,0 +1,24 @@
+# Development image.
+FROM golang:1.21-alpine AS builder
+RUN apk add libpcap-dev libpcap
+RUN apk add build-base
+RUN apk add zsh
+
+# Run docker build from root.
+RUN mkdir -p /go/src/github.com/openconfig/aite
+COPY . /go/src/github.com/openconfig/aite
+WORKDIR /go/src/github.com/openconfig/aite/cmd/aite
+RUN GOOS=linux GOARCH=amd64 go build
+
+# Run second stage for the container that we actually run.
+FROM alpine:latest
+RUN apk add libpcap
+# Useful for debugging tc inside the aite container.
+RUN apk add iproute2-tc
+RUN mkdir /app
+COPY --from=builder go/src/github.com/openconfig/aite/cmd/aite/aite /app
+RUN mkdir /data
+
+EXPOSE 60051
+
+CMD ["/app/aite", "-port=60061"]

cmd/aite/aite.go

@@ -0,0 +1,76 @@
+// Copyright 2023 Google Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+// Binary aite implements a container that can manipulate the state and performance
+// of interfaces within its local network namespace, controlled by a gRPC API. This
+// provides a mechanism for an external caller to introduce impairments to a network
+// simulation (such as one started by KNE).
+package main
+
+import (
+	"flag"
+	"fmt"
+	"net"
+	"os"
+	"os/signal"
+	"syscall"
+
+	"github.com/openconfig/aite/srv"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/reflection"
+	"k8s.io/klog/v2"
+
+	apb "github.com/openconfig/aite/proto/aite"
+)
+
+var (
+	port = flag.Uint("port", 60061, "port for the aite service to listen on")
+)
+
+func main() {
+	klog.InitFlags(nil)
+	flag.Parse()
+
+	serv := grpc.NewServer()
+	as, err := srv.New()
+	if err != nil {
+		klog.Exitf("cannot create Aite server, %v", err)
+	}
+	defer func() {
+		if err := as.Stop(); err != nil {
+			klog.Errorf("error stopping aite: %v", err)
+		}
+	}()
+	apb.RegisterAiteServer(serv, as)
+
+	reflection.Register(serv)
+
+	lis, err := net.Listen("tcp", fmt.Sprintf(":%d", *port))
+	if err != nil {
+		klog.Exitf("cannot start listening, err: %v", err)
+	}
+
+	klog.Infof("aite server listening on %s", lis.Addr().String())
+	defer serv.Stop()
+
+	done := make(chan os.Signal, 1)
+	signal.Notify(done, syscall.SIGINT, syscall.SIGTERM)
+
+	go func() {
+		if err := serv.Serve(lis); err != nil {
+			klog.Exitf("cannot start server, %v", err)
+		}
+	}()
+	<-done
+}

go.mod

@@ -1,3 +1,28 @@
 module github.com/openconfig/aite
 
-go 1.21.4
+go 1.20
+
+require (
+	github.com/florianl/go-tc v0.4.2
+	github.com/openconfig/magna v0.0.0-20231125035949-e9288e23d88d
+	golang.org/x/sys v0.13.0
+	google.golang.org/grpc v1.59.0
+	google.golang.org/protobuf v1.31.0
+	k8s.io/klog v1.0.0
+	k8s.io/klog/v2 v2.110.1
+)
+
+require (
+	github.com/go-logr/logr v1.3.0 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/josharian/native v1.1.0 // indirect
+	github.com/mdlayher/netlink v1.6.0 // indirect
+	github.com/mdlayher/socket v0.1.1 // indirect
+	github.com/vishvananda/netlink v1.1.1-0.20210330154013-f5de75959ad5 // indirect
+	github.com/vishvananda/netns v0.0.0-20200728191858-db3c7e526aae // indirect
+	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/sync v0.3.0 // indirect
+	golang.org/x/text v0.13.0 // indirect
+	google.golang.org/genproto/googleapis/rpc v0.0.0-20230822172742-b8732ec3820d // indirect
+)

go.sum

@@ -0,0 +1,144 @@
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