1. 檢視kafka都有那些topic
a. list
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --list --zookeeper test1.hadoop.puhuifinance.com:2181
b. describe
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --describe --zookeeper test1.hadoop.puhuifinance.com:2181 --topic test
c. delete, 這裡要設定 delete.topic.enable=true
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --delete --zookeeper test1.hadoop.puhuifinance.com:2181 --topic test
d. 檢視topic中的資料
/usr/hdp/current/kafka-broker/bin/kafka-console-consumer.sh --zookeeper test1.hadoop.puhuifinance.com:2181 --topic test
# --from-beginning 從頭開始讀取
# --property print.key=true 列印key
e. 檢視針對topic每個group 消費的程度, 是不是特定的zookeeper path?
/usr/hdp/current/kafka-broker/bin/kafka-consumer-offset-checker.sh --zookeeper=test1.hadoop.puhuifinance.com:2181 --group=test
f. 生產者:
/usr/hdp/current/kafka-broker/bin/kafka-console-producer.sh --broker-list test1.hadoop.puhuifinance.com:6667 --topic test < flume-spark.log
2. topic的建立與修改.
a. create
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --create --zookeeper test1.hadoop.puhuifinance.com:2181 --replication-factor 2 --partitions 4 --topic test
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --create --zookeeper test1.hadoop.puhuifinance.com:2181 --replication-factor 3 --partitions 3 --topic test
b. alter partitions
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --alter --zookeeper test1.hadoop.puhuifinance.com:2181 --partitions 3 --topic test
3. 更改replication
a. 首先檢視topic當前的partition 及replication狀態.
cat topics-info.json
{"topics": [{"topic": "TaoBaoTopic"}],
"version":1
}
/usr/hdp/current/kafka-broker/bin/kafka-reassign-partitions.sh --zookeeper test1.hadoop.puhuifinance.com:2181 --topics-to-move-json-file topics-info.json --broker-list "1,2" --generate
b. 會得到類似下面的結果:
Current partition replica assignment
{
"version": 1,
"partitions": [
{
"topic": "TaoBaoTopic",
"partition": 2,
"replicas": [
1
]
},
{
"topic": "TaoBaoTopic",
"partition": 0,
"replicas": [
2
]
},
{
"topic": "TaoBaoTopic",
"partition": 1,
"replicas": [
0
]
}
]
}
c. 根據要改動的replication策略, 例如:
cat TaoBao_Topic_alter_replication.json
{
"version": 1,
"partitions": [
{
"topic": "TaoBaoTopic",
"partition": 2,
"replicas": [
1,2,0
]
},
{
"topic": "TaoBaoTopic",
"partition": 0,
"replicas": [
2,0,1
]
},
{
"topic": "TaoBaoTopic",
"partition": 1,
"replicas": [
0,1,2
]
}
]
}
d. 將更改的策略進行實施, TaoBao_Topic_alter_replication.json
/usr/hdp/current/kafka-broker/bin//kafka-reassign-partitions.sh --zookeeper test1.hadoop.puhuifinance.com:2181 --reassignment-json-file TaoBao_Topic_alter_replication.json --execute
Current partition replica assignment
{"version":1,"partitions":[{"topic":"TaoBaoTopic","partition":2,"replicas":[1]},{"topic":"TaoBaoTopic","partition":0,"replicas":[2]},{"topic":"TaoBaoTopic","partition":1,"replicas":[0]}]}
Save this to use as the --reassignment-json-file option during rollback
Successfully started reassignment of partitions {"version":1,"partitions":[{"topic":"TaoBaoTopic","partition":2,"replicas":[1,2,0]},{"topic":"TaoBaoTopic","partition":0,"replicas":[2,0,1]},{"topic":"TaoBaoTopic","partition":1,"replicas":[0,1,2]}]}
e. 檢視replication的過程,或者是服務遷移的過程, 例如將原有的topic分配到新增加的伺服器上.
/usr/hdp/current/kafka-broker/bin//kafka-reassign-partitions.sh --zookeeper test1.hadoop.puhuifinance.com:2181 --reassignment-json-file TaoBao_Topic_alter_replication.json --verify
Status of partition reassignment:
Reassignment of partition [TaoBaoTopic,2] completed successfully
Reassignment of partition [TaoBaoTopic,0] completed successfully
Reassignment of partition [TaoBaoTopic,1] completed successfully
f. 通過之前的命令, 可以再檢視下當前的狀態.
/usr/hdp/current/kafka-broker/bin/kafka-reassign-partitions.sh --zookeeper test1.hadoop.puhuifinance.com:2181 --topics-to-move-json-file topics-info.json --broker-list "0,1,2" --generate
或者是describe
/usr/hdp/current/kafka-broker/bin/kafka-topics.sh --describe --zookeeper test1.hadoop.puhuifinance.com:2181 --topic test
4. 一些引數設定
a. producer http://kafka.apache.org/documentation.html#producerconfigs
request.required.acks=1
producer.type=sync
compression.codec=snappy