Merge pull request #22 from zerodha/refactor

Fully refactor the codebase. This is a breaking major version change.

.gitignore

@@ -22,3 +22,4 @@ go.work
 config.toml
 /dist
 kaf-relay.bin
+kaf-relay

.goreleaser.yml

@@ -16,6 +16,6 @@ builds:
 archives:
   - format: tar.gz
     files:
-      - config.toml.sample
+      - config.sample.toml
       - README.md
       - LICENSE

Makefile

@@ -10,7 +10,7 @@ BIN := kaf-relay
 .PHONY: build
 build: $(BIN)
 
-$(BIN):
+$(BIN): $(shell find . -type f -name "*.go") go.mod go.sum
 	CGO_ENABLED=0 go build -o ${BIN} --ldflags="-X 'main.buildString=${BUILDSTR}'"
 
 .PHONY: clean

config.sample.toml

@@ -0,0 +1,135 @@
+[app]
+log_level = "debug"
+metrics_server_addr = ":7081"
+
+
+# Map of topics from the source to sync to the target.
+# source_topic => target_topic:optional_target_partition
+# If the target partition is not specified, whatever partition a message
+# was received from the source, the same partition is written to the target.
+[[topics]]
+source_topic1 = "target_topic1:1"
+source_topic2 = "target_topic2"
+
+
+[source_pool]
+# Kafka client config common to all upstream sources ([[sources]]).
+initial_offset = "start"
+instance_id = "client_instance_id"
+group_id = "consumer_group"
+
+# Frequency at which source servers are polled for health/lag.
+healthcheck_interval = "3s"
+
+# Max difference in total offsets across all topics on a source
+# against other sources, which when breached, the source is marked
+# as unhealthy because of a lag.
+offset_lag_threshold = 1000
+
+# Maximum number of connect/fetch retries before exiting. -1 for infinite.
+max_retries = -1
+
+# Kafka exponential retry-backoff config for reconnection attempts.
+# If both min and max values are the same, then it's a static wait time
+# between attempts.
+backoff_enable = true
+backoff_min = "2s"
+backoff_max = "10s"
+
+# Wait timeout of a request/response to a Kafka instance to determine
+# whether it's healthy or not.
+request_timeout = "100ms"
+
+
+[[sources]]
+name = "node1"
+servers = ["127.0.0.1:9092"]
+session_timeout = "6s"
+enable_auth = true
+sasl_mechanism = "PLAIN"
+username = "user-x"
+password = "pass-x"
+max_wait_time = "10ms"
+max_failovers = -1 # infinite
+
+enable_tls = false
+client_key_path = ""
+client_cert_path = ""
+ca_cert_path = ""
+
+enable_log = false
+
+[[sources]]
+name = "node2"
+servers = ["node2:9092"]
+session_timeout = "6s"
+enable_auth = true
+sasl_mechanism = "PLAIN"
+username = "user-x"
+password = "pass-x"
+max_wait_time = "10ms"
+max_failovers = -1 # infinite
+
+enable_tls = false
+client_key_path = ""
+client_cert_path = ""
+ca_cert_path = ""
+
+enable_log = false
+
+
+# Destination kafka producer configuration
+[target]
+name = "node3"
+servers = ["127.0.0.1:9095"]
+enable_log = false
+enable_auth = true
+sasl_mechanism = "PLAIN" # PLAIN/SCRAM-SHA-256/SCRAM-SHA-512
+username = "user-y"
+password = "pass-y"
+enable_idempotency = true
+commit_ack_type = "cluster"
+flush_frequency = "20ms"
+session_timeout = "6s"
+
+enable_tls = false
+client_key_path = ""
+client_cert_path = ""
+ca_cert_path = ""
+
+# -1 for infinite.
+max_retries = -1
+flush_batch_size = 1000
+batch_size = 1000
+max_message_bytes = 10000000
+
+# Kafka exponential retry-backoff config for reconnection attempts.
+# If both min and max values are the same, then it's a static wait time
+# between attempts.
+backoff_enable = true
+backoff_min = "2s"
+backoff_max = "10s"
+
+# Wait timeout of a request/response to a Kafka instance to determine
+# whether it's healthy or not.
+request_timeout = "100ms"
+
+
+# Custom go-plugin filter to load to filter messages when relaying
+[filters.test]
+enabled = false
+path = "test.bin"
+config = '''
+{
+    "address": ["127.0.0.1:6379"],
+    "username": "",
+    "password": "",
+    "db": 10,
+    "max_active": 50,
+    "max_idle": 20,
+    "dial_timeout": 3000,
+    "read_timeout": 3000,
+    "write_timeout": 3000,
+    "idle_timeout": 30000
+}
+'''