Adding a Makefile
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sttlab
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# ──────────────────────────────────────────────────────────────────────────────
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# Kafka cluster management — Strimzi / k3s
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# Requires: kubectl + helm configured for the target cluster
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# ──────────────────────────────────────────────────────────────────────────────
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NAMESPACE := kafka
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BROKER := kafka-dual-role-0
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BOOTSTRAP := kafka-kafka-bootstrap.$(NAMESPACE).svc.cluster.local:9093
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SCRIPT_DIR := $(dir $(abspath $(lastword $(MAKEFILE_LIST))))
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KAFKA_NAME := kafka
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# Overridable per invocation
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TOPIC ?= smoke-test
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MESSAGE ?= hello
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GROUP ?= my-group
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MAX ?= 10
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PARTITIONS ?= 1
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REPLICAS ?= 1
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KAFKA_VER ?= 4.1.0
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METADATA_VER ?= 4.1-IV0
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KUBECTL := kubectl -n $(NAMESPACE)
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KEXEC := $(KUBECTL) exec $(BROKER) --
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KAFKA_BIN := /opt/kafka/bin
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.DEFAULT_GOAL := help
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.PHONY: help \
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deploy smoke-test upgrade teardown \
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_config \
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topic-list topic-create topic-delete \
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produce consume list-messages \
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group-list group-offsets
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# ── Help ──────────────────────────────────────────────────────────────────────
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help:
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@printf "Usage: make <target> [VARIABLE=value ...]\n\n"
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@printf "Cluster lifecycle:\n"
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@printf " deploy Install Strimzi operator + Kafka cluster + users\n"
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@printf " smoke-test Run produce/consume end-to-end test\n"
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@printf " upgrade Upgrade Kafka (KAFKA_VER=) or Strimzi operator\n"
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@printf " teardown Delete the Kafka cluster and namespace\n"
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@printf "\nTopics:\n"
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@printf " topic-list List all topics\n"
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@printf " topic-create Create TOPIC (idempotent)\n"
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@printf " topic-delete Delete TOPIC\n"
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@printf "\nMessages:\n"
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@printf " produce Produce MESSAGE into TOPIC\n"
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@printf " consume Consume MAX messages from TOPIC (from latest)\n"
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@printf " list-messages Consume MAX messages from TOPIC (from beginning)\n"
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@printf "\nConsumer groups:\n"
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@printf " group-list List all consumer groups\n"
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@printf " group-offsets Show offsets and lag for GROUP\n"
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@printf "\nVariables (current values):\n"
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@printf " TOPIC=%-12s KAFKA_VER=%-10s PARTITIONS=%s\n" "$(TOPIC)" "$(KAFKA_VER)" "$(PARTITIONS)"
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@printf " MESSAGE=%-12s GROUP=%-10s REPLICAS=%s\n" "$(MESSAGE)" "$(GROUP)" "$(REPLICAS)"
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@printf " MAX=%-12s METADATA_VER=%s\n\n" "$(MAX)" "$(METADATA_VER)"
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# ── Cluster lifecycle ─────────────────────────────────────────────────────────
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deploy:
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@echo "==> [1/5] Creating namespace '$(NAMESPACE)'"
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@kubectl create namespace $(NAMESPACE) --dry-run=client -o yaml | kubectl apply -f -
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@echo "==> [2/5] Installing Strimzi operator"
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@helm repo add strimzi https://strimzi.io/charts/ 2>/dev/null || true
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@helm repo update strimzi 2>/dev/null
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@helm upgrade --install strimzi-kafka-operator strimzi/strimzi-kafka-operator \
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--namespace $(NAMESPACE) \
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--set watchAnyNamespace=false \
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--wait --timeout 5m
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@echo "==> [3/5] Waiting for Strimzi CRDs"
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@for crd in kafkas.kafka.strimzi.io kafkanodepools.kafka.strimzi.io kafkausers.kafka.strimzi.io; do \
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until kubectl get crd "$$crd" -o jsonpath='{.status.conditions[?(@.type=="Established")].status}' 2>/dev/null | grep -q True; do sleep 2; done; \
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echo " $$crd ready"; \
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done
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@echo "==> [4/5] Deploying Kafka cluster (KRaft, SASL_SSL, SCRAM-SHA-512)"
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@kubectl apply -f $(SCRIPT_DIR)kafka.yaml
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@kubectl wait kafka/$(KAFKA_NAME) --for=condition=Ready --timeout=10m -n $(NAMESPACE)
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@echo "==> [5/5] Deploying KafkaUsers"
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@kubectl apply -f $(SCRIPT_DIR)kafka-users.yaml
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@for user in kafka-admin kafka-client; do \
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kubectl wait kafkauser/$$user --for=condition=Ready --timeout=120s -n $(NAMESPACE); \
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done
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@echo ""
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@echo "Cluster ready. Bootstrap: $(BOOTSTRAP)"
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smoke-test:
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@echo "==> Running smoke test"
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@$(KUBECTL) delete job kafka-smoke-test --ignore-not-found > /dev/null
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@kubectl apply -f $(SCRIPT_DIR)kafka-smoke-test.yaml
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@until $(KUBECTL) get pod -l job-name=kafka-smoke-test \
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-o jsonpath='{.items[0].status.phase}' 2>/dev/null | grep -qE 'Succeeded|Failed'; do sleep 3; done
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@$(KUBECTL) logs -l job-name=kafka-smoke-test --tail=20
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@$(KUBECTL) get pod -l job-name=kafka-smoke-test \
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-o jsonpath='{.items[0].status.phase}' | grep -q Succeeded \
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&& echo "==> Smoke test PASSED" \
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|| { echo "==> Smoke test FAILED"; exit 1; }
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upgrade:
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@echo "==> Upgrading Strimzi operator"
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@helm repo update strimzi 2>/dev/null
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@helm upgrade strimzi-kafka-operator strimzi/strimzi-kafka-operator \
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--namespace $(NAMESPACE) \
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--set watchAnyNamespace=false \
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--wait --timeout 5m
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@echo "==> Upgrading Kafka to $(KAFKA_VER) (metadataVersion=$(METADATA_VER))"
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@$(KUBECTL) patch kafka $(KAFKA_NAME) --type=merge \
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-p '{"spec":{"kafka":{"version":"$(KAFKA_VER)","metadataVersion":"$(METADATA_VER)"}}}'
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@kubectl wait kafka/$(KAFKA_NAME) --for=condition=Ready --timeout=10m -n $(NAMESPACE)
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@echo "==> Upgrade complete"
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@$(KUBECTL) get kafka $(KAFKA_NAME)
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teardown:
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@echo "==> Deleting KafkaUsers and Kafka cluster"
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@kubectl delete -f $(SCRIPT_DIR)kafka-users.yaml --ignore-not-found
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@kubectl delete -f $(SCRIPT_DIR)kafka.yaml --ignore-not-found
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@echo "==> Waiting for pods to terminate"
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@$(KUBECTL) wait pod -l strimzi.io/cluster=$(KAFKA_NAME) \
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--for=delete --timeout=120s 2>/dev/null || true
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@echo "==> Uninstalling Strimzi operator"
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@helm uninstall strimzi-kafka-operator -n $(NAMESPACE) 2>/dev/null || true
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@echo "==> Deleting namespace '$(NAMESPACE)'"
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@kubectl delete namespace $(NAMESPACE) --ignore-not-found
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@echo "==> Teardown complete"
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# ── Internal: write client config into the broker pod ─────────────────────────
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_config:
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@$(KUBECTL) get secret kafka-cluster-ca-cert \
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-o jsonpath='{.data.ca\.crt}' | base64 -d \
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| $(KUBECTL) exec -i $(BROKER) -- tee /tmp/mk-ca.crt > /dev/null
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@$(KUBECTL) get secret kafka-client \
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-o jsonpath='{.data.sasl\.jaas\.config}' | base64 -d \
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| $(KUBECTL) exec -i $(BROKER) -- tee /tmp/mk-jaas.conf > /dev/null
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@$(KEXEC) /bin/bash -c \
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'printf "security.protocol=SASL_SSL\nssl.truststore.type=PEM\nssl.truststore.location=/tmp/mk-ca.crt\nsasl.mechanism=SCRAM-SHA-512\nsasl.jaas.config=$$(cat /tmp/mk-jaas.conf)\n" \
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> /tmp/mk-client.properties'
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# ── Topics ────────────────────────────────────────────────────────────────────
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topic-list: _config
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@$(KEXEC) $(KAFKA_BIN)/kafka-topics.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--command-config /tmp/mk-client.properties \
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--list
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topic-create: _config
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@$(KEXEC) $(KAFKA_BIN)/kafka-topics.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--command-config /tmp/mk-client.properties \
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--create \
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--topic $(TOPIC) \
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--partitions $(PARTITIONS) \
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--replication-factor $(REPLICAS) \
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--if-not-exists
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@echo "Topic '$(TOPIC)' ready (partitions=$(PARTITIONS) replicas=$(REPLICAS))"
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topic-delete: _config
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@$(KEXEC) $(KAFKA_BIN)/kafka-topics.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--command-config /tmp/mk-client.properties \
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--delete \
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--topic $(TOPIC)
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@echo "Topic '$(TOPIC)' deleted"
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# ── Messages ──────────────────────────────────────────────────────────────────
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produce: _config
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@echo "$(MESSAGE)" \
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| $(KUBECTL) exec -i $(BROKER) -- \
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$(KAFKA_BIN)/kafka-console-producer.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--producer.config /tmp/mk-client.properties \
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--topic $(TOPIC)
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@echo "Produced to '$(TOPIC)': $(MESSAGE)"
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consume: _config
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@$(KEXEC) $(KAFKA_BIN)/kafka-console-consumer.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--consumer.config /tmp/mk-client.properties \
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--topic $(TOPIC) \
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--max-messages $(MAX) \
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--timeout-ms 10000 2>/dev/null
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list-messages: _config
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@$(KEXEC) $(KAFKA_BIN)/kafka-console-consumer.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--consumer.config /tmp/mk-client.properties \
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--topic $(TOPIC) \
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--from-beginning \
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--max-messages $(MAX) \
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--timeout-ms 15000 2>/dev/null
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# ── Consumer groups ───────────────────────────────────────────────────────────
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group-list: _config
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@$(KEXEC) $(KAFKA_BIN)/kafka-consumer-groups.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--command-config /tmp/mk-client.properties \
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--list 2>/dev/null
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group-offsets: _config
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@$(KEXEC) /bin/bash -c \
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'out=$$( $(KAFKA_BIN)/kafka-consumer-groups.sh \
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--bootstrap-server $(BOOTSTRAP) \
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--command-config /tmp/mk-client.properties \
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--group $(GROUP) --describe 2>/dev/null); \
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echo "$$out" | grep -q GroupIdNotFoundException \
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&& echo "Group $(GROUP) not found (no consumer has connected yet)" \
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|| echo "$$out"'
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