From 8da0b6dcef3837bd0a8173076f1a8de607feff1e Mon Sep 17 00:00:00 2001 From: Dipjyoti Metia Date: Mon, 1 Apr 2024 22:18:57 +1100 Subject: [PATCH] adding support for streaming data --- docker-compose.yml | 40 ++++++------ docker/create_topics.sh | 7 +- go.mod | 2 +- go.sum | 8 +-- streaming/Dockerfile | 41 ++++++++++++ streaming/go.mod | 33 ++++++++++ streaming/go.sum | 139 ++++++++++++++++++++++++++++++++++++++++ streaming/main.go | 122 +++++++++++++++++++++++++++++++++++ 8 files changed, 362 insertions(+), 30 deletions(-) create mode 100644 streaming/Dockerfile create mode 100644 streaming/go.mod create mode 100644 streaming/go.sum create mode 100644 streaming/main.go diff --git a/docker-compose.yml b/docker-compose.yml index 2f360bb..48dfa0c 100644 --- a/docker-compose.yml +++ b/docker-compose.yml @@ -1,45 +1,45 @@ version: '3.8' services: - event-stream: + event-publisher: build: context: . dockerfile: Dockerfile - container_name: event-stream + container_name: event-publisher ports: - "8083:8083" depends_on: - init-topic environment: - BROKERS: kafka:9092 + BROKERS: kafka:29092 TOPICS: expense-topic,payment-topic,transaction-topic - SCHEMAREGISTRY: kafka:8081 + SCHEMAREGISTRY: kafka:8081 + healthcheck: + test: ["CMD", "curl", "-f", "http://localhost:8083/health"] + interval: 30s + timeout: 10s + retries: 5 + start_period: 20s kafka: image: docker.vectorized.io/vectorized/redpanda:latest container_name: kafka command: - - redpanda - - start - - --smp - - "1" + - redpanda start + - --smp 1 + - --memory 1G + - --reserve-memory 0M - --overprovisioned - - --kafka-addr - - "PLAINTEXT://0.0.0.0:29092,OUTSIDE://0.0.0.0:9092" - - --advertise-kafka-addr - - "PLAINTEXT://kafka:29092,OUTSIDE://kafka:9092" - - --pandaproxy-addr - - "0.0.0.0:8082" - - --advertise-pandaproxy-addr - - "localhost:8082" + - --node-id 0 + - --check=false + - --kafka-addr PLAINTEXT://0.0.0.0:29092,OUTSIDE://0.0.0.0:9092 + - --advertise-kafka-addr PLAINTEXT://kafka:29092,OUTSIDE://localhost:9092 + - --pandaproxy-addr 0.0.0.0:8082 + - --advertise-pandaproxy-addr localhost:8082 ports: - "8081:8081" - "8082:8082" - "9092:9092" - "29092:29092" - environment: - REDPANDA_AUTO_CREATE_TOPICS_ENABLED: "true" - REDPANDA_DEFAULT_REPLICATION_FACTOR: "1" - REDPANDA_LOG_LEVEL: "info" init-topic: build: diff --git a/docker/create_topics.sh b/docker/create_topics.sh index d9d5c7b..9cfe91c 100644 --- a/docker/create_topics.sh +++ b/docker/create_topics.sh @@ -9,19 +9,20 @@ SCHEMA_REGISTRY="http://kafka:8081/subjects" # Connect to kafka and create topics with schema for TOPIC in expense payment transaction do - rpk --brokers $BROKER topic create ${TOPIC}-topic + # Create topic with 5 partitions and 1 replication factor + rpk --brokers $BROKER topic create ${TOPIC}-topic -p 5 -r 1 if [ $? -ne 0 ]; then echo "Failed to create topic ${TOPIC}-topic" exit 1 fi - + # Add schema for topic curl -X POST -H "Content-Type: application/vnd.schemaregistry.v1+json" \ --data @/${TOPIC}.json $SCHEMA_REGISTRY/${TOPIC}-topic-value/versions if [ $? -ne 0 ]; then echo "Failed to add schema for ${TOPIC}-topic" exit 1 fi - + # Get info for topic rpk --brokers $BROKER topic info ${TOPIC}-topic if [ $? -ne 0 ]; then echo "Failed to get info for ${TOPIC}-topic" diff --git a/go.mod b/go.mod index 4991b51..d178d25 100644 --- a/go.mod +++ b/go.mod @@ -24,7 +24,7 @@ require ( github.com/modern-go/reflect2 v1.0.2 // indirect github.com/pierrec/lz4/v4 v4.1.21 // indirect github.com/rivo/uniseg v0.4.7 // indirect - github.com/stretchr/testify v1.7.5 // indirect + github.com/stretchr/testify v1.8.4 // indirect github.com/twmb/franz-go/pkg/kmsg v1.7.0 // indirect github.com/valyala/bytebufferpool v1.0.0 // indirect github.com/valyala/fasthttp v1.52.0 // indirect diff --git a/go.sum b/go.sum index 487d81d..d76ceeb 100644 --- a/go.sum +++ b/go.sum @@ -40,11 +40,9 @@ github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJ github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ= github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88= github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME= -github.com/stretchr/objx v0.4.0/go.mod h1:YvHI0jy2hoMjB+UWwv71VJQ9isScKT/TqJzVSSt89Yw= github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI= -github.com/stretchr/testify v1.7.1/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg= -github.com/stretchr/testify v1.7.5 h1:s5PTfem8p8EbKQOctVV53k6jCJt3UX4IEJzwh+C324Q= -github.com/stretchr/testify v1.7.5/go.mod h1:yNjHg4UonilssWZ8iaSj1OCr/vHnekPRkoO+kdMU+MU= +github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk= +github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo= github.com/twmb/franz-go v1.16.1 h1:rpWc7fB9jd7TgmCyfxzenBI+QbgS8ZfJOUQE+tzPtbE= github.com/twmb/franz-go v1.16.1/go.mod h1:/pER254UPPGp/4WfGqRi+SIRGE50RSQzVubQp6+N4FA= github.com/twmb/franz-go/pkg/kmsg v1.7.0 h1:a457IbvezYfA5UkiBvyV3zj0Is3y1i8EJgqjJYoij2E= @@ -63,7 +61,5 @@ golang.org/x/sys v0.0.0-20220811171246-fbc7d0a398ab/go.mod h1:oPkhp1MJrh7nUepCBc golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg= golang.org/x/sys v0.18.0 h1:DBdB3niSjOA/O0blCZBqDefyWNYveAYMNF1Wum0DYQ4= golang.org/x/sys v0.18.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA= -gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0= -gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA= gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM= diff --git a/streaming/Dockerfile b/streaming/Dockerfile new file mode 100644 index 0000000..e7b3060 --- /dev/null +++ b/streaming/Dockerfile @@ -0,0 +1,41 @@ +# Stage 1: Build the Go application +FROM golang:1.22.1-bullseye as builder + +LABEL author="Dipjyoti Metia" +LABEL version="1.0" + +ENV CGO_ENABLED=0 +ENV GO111MODULE=on + +WORKDIR /app + +COPY go.* ./ +RUN --mount=type=cache,target=/go/pkg/mod \ + go mod download + +COPY . . + +RUN --mount=type=cache,target=/go/pkg/mod \ + CGO_ENABLED=0 GOOS=linux go build -a -o ./server . + +# Final stage +FROM debian:buster-slim + +WORKDIR /app + +RUN set -x && apt-get update && DEBIAN_FRONTEND=noninteractive apt-get install -y \ + ca-certificates && \ + rm -rf /var/lib/apt/lists/* + +# Create a group and user +RUN groupadd -r app && useradd -r -g app app + +# Change the ownership of the /app directory to our app user +RUN chown -R app:app /app + +# Switch to 'app' user +USER app + +COPY --from=builder /app/server /app/server + +ENTRYPOINT ["/app/server"] \ No newline at end of file diff --git a/streaming/go.mod b/streaming/go.mod new file mode 100644 index 0000000..c254e92 --- /dev/null +++ b/streaming/go.mod @@ -0,0 +1,33 @@ +module event-streaming + +go 1.22.1 + +require ( + github.com/IBM/sarama v1.43.1 + github.com/lovoo/goka v1.1.11 +) + +require ( + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/eapache/go-resiliency v1.6.0 // indirect + github.com/eapache/go-xerial-snappy v0.0.0-20230731223053-c322873962e3 // indirect + github.com/eapache/queue v1.1.0 // indirect + github.com/go-stack/stack v1.8.1 // indirect + github.com/golang/mock v1.6.0 // indirect + github.com/golang/snappy v0.0.4 // indirect + github.com/hashicorp/errwrap v1.1.0 // indirect + github.com/hashicorp/go-multierror v1.1.1 // indirect + github.com/hashicorp/go-uuid v1.0.3 // indirect + github.com/jcmturner/aescts/v2 v2.0.0 // indirect + github.com/jcmturner/dnsutils/v2 v2.0.0 // indirect + github.com/jcmturner/gofork v1.7.6 // indirect + github.com/jcmturner/gokrb5/v8 v8.4.4 // indirect + github.com/jcmturner/rpc/v2 v2.0.3 // indirect + github.com/klauspost/compress v1.17.7 // indirect + github.com/pierrec/lz4/v4 v4.1.21 // indirect + github.com/rcrowley/go-metrics v0.0.0-20201227073835-cf1acfcdf475 // indirect + github.com/syndtr/goleveldb v1.0.0 // indirect + golang.org/x/crypto v0.21.0 // indirect + golang.org/x/net v0.22.0 // indirect + golang.org/x/sync v0.6.0 // indirect +) diff --git a/streaming/go.sum b/streaming/go.sum new file mode 100644 index 0000000..77a1ad4 --- /dev/null +++ b/streaming/go.sum @@ -0,0 +1,139 @@ +github.com/IBM/sarama v1.43.1 h1:Z5uz65Px7f4DhI/jQqEm/tV9t8aU+JUdTyW/K/fCXpA= +github.com/IBM/sarama v1.43.1/go.mod h1:GG5q1RURtDNPz8xxJs3mgX6Ytak8Z9eLhAkJPObe2xE= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/eapache/go-resiliency v1.6.0 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goka.Group = "expense-group" + + tmc *goka.TopicManagerConfig +) + +func init() { + // This sets the default replication to 1. If you have more then one broker + // the default configuration can be used. + tmc = goka.NewTopicManagerConfig() + tmc.Table.Replication = 1 + tmc.Stream.Replication = 1 +} + +// emits a single message and leave +func runEmitter() { + emitter, err := goka.NewEmitter(brokers, topic, new(codec.String)) + if err != nil { + log.Fatalf("error creating emitter: %v", err) + } + defer emitter.Finish() + err = emitter.EmitSync("some-key", "some-value") + if err != nil { + log.Fatalf("error emitting message: %v", err) + } + log.Println("message emitted") +} + +// process messages until ctrl-c is pressed +func runProcessor() { + // process callback is invoked for each message delivered from + cb := func(ctx goka.Context, msg interface{}) { + var counter int64 + // ctx.Value() gets from the group table the value that is stored for + // the message's key. + if val := ctx.Value(); val != nil { + counter = val.(int64) + } + counter++ + // SetValue stores the incremented counter in the group table for in + // the message's key. + ctx.SetValue(counter) + log.Printf("key = %s, counter = %v, msg = %v", ctx.Key(), counter, msg) + } + + // Define a new processor group. The group defines all inputs, outputs, and + // serialization formats. The group-table topic is "example-group-table". + g := goka.DefineGroup(group, + goka.Input(topic, new(codec.String), cb), + goka.Persist(new(codec.Int64)), + ) + + p, err := goka.NewProcessor(brokers, + g, + goka.WithTopicManagerBuilder(goka.TopicManagerBuilderWithTopicManagerConfig(tmc)), + goka.WithConsumerGroupBuilder(goka.DefaultConsumerGroupBuilder), + ) + if err != nil { + log.Fatalf("error creating processor: %v", err) + } + ctx, cancel := context.WithCancel(context.Background()) + done := make(chan struct{}) + go func() { + defer close(done) + if err = p.Run(ctx); err != nil { + log.Printf("error running processor: %v", err) + } + }() + + sigs := make(chan os.Signal) + go func() { + signal.Notify(sigs, syscall.SIGINT, syscall.SIGTERM, syscall.SIGKILL) + }() + + select { + case <-sigs: + case <-done: + } + cancel() + <-done +} + +func main() { + config := goka.DefaultConfig() + // since the emitter only emits one message, we need to tell the processor + // to read from the beginning + // As the processor is slower to start than the emitter, it would not consume the first + // message otherwise. + // In production systems however, check whether you really want to read the whole topic on first start, which + // can be a lot of messages. + config.Consumer.Offsets.Initial = sarama.OffsetOldest + goka.ReplaceGlobalConfig(config) + + tm, err := goka.NewTopicManager(brokers, goka.DefaultConfig(), tmc) + if err != nil { + log.Fatalf("Error creating topic manager: %v", err) + } + defer tm.Close() + err = tm.EnsureStreamExists(string(topic), 8) + if err != nil { + log.Printf("Error creating kafka topic %s: %v", topic, err) + } + + runEmitter() // emits one message and stops + runProcessor() // press ctrl-c to stop +}