在之前我們已經安裝過kafka,我們直接進行單機多broker搭建。kafka安裝請參考:kafka 教程(一) 第一個實例
爲後續方便我們統一使用hadoop001作爲本臺機器的主機名,並修改hosts將主機名指向127.0.0.1
hostname hadoop001
echo hadoop001 > /proc/sys/kernel/hostname
echo 127.0.0.1 hadoop001 >> /etc/hosts
一:安裝zookeeper
1.下載解壓zookeeper,使用cdh5.7.0版本對應的zookeeper-3.4.5
wget https://archive.apache.org/dist/zookeeper/zookeeper-3.4.5/zookeeper-3.4.5.tar.gz
tar -zxvf zookeeper-3.4.5.tar.gz
2.進入zookeeper conf目錄複製一份配置文件模板zoo_sample.cfg並命名爲zoo.cfg
cd zookeeper-3.4.5/conf
cp zoo_sample.cfg zoo.cfg
3.編輯配置文件
修改zookeeper數據目錄爲:/usr/server/tmp/zookeeper,由於我們只啓動單節點的zookeeper 所以端口不需要修改。
# synchronization phase can take
initLimit=10
# The number of ticks that can pass between
# sending a request and getting an acknowledgement
syncLimit=5
# the directory where the snapshot is stored.
# do not use /tmp for storage, /tmp here is just
# example sakes.
dataDir=/usr/server/tmp/zookeeper
# the port at which the clients will connect
clientPort=2181
#
# Be sure to read the maintenance section of the
# administrator guide before turning on autopurge.
4.啓動zookeeper
cd ../bin
./zkServer.sh start
打印如下信息可以看到啓動成功
JMX enabled by default
Using config: /usr/server/zookeeper-3.4.5/bin/../conf/zoo.cfg
Starting zookeeper ... STARTED
使用jps或者jps -m查看
jps -m
-------------------------
12867 Jps -m
12838 QuorumPeerMain /usr/server/zookeeper-3.4.5/bin/../conf/zoo.cfg
至此zookeeper安裝啓動成功。
二:kafka集羣搭建
1.進入kafka目錄的config文件夾,複製並修改配置文件,這裏需要修改的位置有三個:
broker.id=1
listeners=PLAINTEXT://:9093
log.dirs=/tmp/kafka-logs-1
broker.id爲broker的唯一標識,使用唯一的id,修改端口號和指定不同的日誌輸出地址
我們創建三個broker,server.porperties文件複製三份,分別命名爲:server-1.porperties,server-2.porperties,server-3.porperties
cp server.properties server-1.properties
cp server.properties server-2.properties
cp server.properties server-3.properties
結果如下圖所示:
2.依次編輯並修改server-1.porperties,server-2.porperties,server-3.porperties三個文件,id分別設爲:1,2,3,端口分別爲:9093,9094,9095,日誌路徑爲:/usr/server/tmp/kafka/kafka-logs-1,/usr/server/tmp/kafka/kafka-logs-2,/usr/server/tmp/kafka/kafka-logs-3
# The id of the broker. This must be set to a unique integer for each broker.
broker.id=1
############################# Socket Server Settings #############################
listeners=PLAINTEXT://:9093
# The port the socket server listens on
#port=9092
# Hostname the broker will bind to. If not set, the server will bind to all interfaces
#host.name=localhost
############################# Log Basics #############################
# A comma seperated list of directories under which to store log files
log.dirs=/usr/server/tmp/kafka/kafka-logs-1
後兩個文件類似,此處不在複述。
3.分別以三份配置文件啓動三個broker,實現單機多broker集羣
回到kafka根目錄執行如下命令
./bin/kafka-server-start.sh config/server-1.properties &
./bin/kafka-server-start.sh config/server-2.properties &
./bin/kafka-server-start.sh config/server-3.properties &
命令後加 & 表示輸出啓動日誌到控制檯以後臺方式啓動,也可以使用 nohup [cmd] & 完全後臺運行,後臺運行的方式可以參考:Linux 後臺運行程序 nohup和& 的使用
執行後使用 jps -m命令查看:
[root@hadoop001 kafka_2.11-0.9.0.0]# jps -m
13219 Kafka config/server-1.properties
12838 QuorumPeerMain /usr/server/zookeeper-3.4.5/bin/../conf/zoo.cfg
13334 Kafka config/server-3.properties
13401 Jps -m
13277 Kafka config/server-2.properties
可以看到已經啓動的三個broker
至此單機多broker集羣配置完成,多機多集羣可以參考單機多broker類似
三:容錯測試
1.先創建一個topic
./bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 3 --partitions 1 --topic hello-mrpei
提示:
Created topic "hello-mrpei".
成功的創建了一個 名稱爲“hello-mrpei”的topic
下面我們查看一下這個topic的相關信息
./bin/kafka-topics.sh --describe --zookeeper localhost:2181 --topic hello-mrpei
可以看到如下信息:
Topic:hello-mrpei PartitionCount:1 ReplicationFactor:3 Configs:
Topic: hello-mrpei Partition: 0 Leader: 2 Replicas: 2,1,3 Isr: 2,1,3
topic名稱 分區數爲:1 副本數爲:3 leader節點爲:2 副本爲 :2,,1,3 存活的副本:2,1,3
2.創建控制檯生成者和消費者 生成和消費消息
啓動一個新的終端,創建生產者producer,向hello-mrpei topic寫數據
./bin/kafka-console-producer.sh --broker-list hadoop001:9093 --topic hello-mrpei
創建消費者,消費hello-mrpei topic的消息
啓動一個新的終端,進入kafka目錄,啓動控制檯消費者
./bin/kafka-console-consumer.sh --zookeeper localhost:2181 --from-beginning --topic hello-mrpei
--from-beginning表示消費歷史消息
發送可接收消息正常
發送:
接收:
3.容錯測試
通過強制終止部分broker進程,查看kafka的穩定性。
首先查看當前topic的信息:
[root@hadoop001 kafka_2.11-0.9.0.0]# ./bin/kafka-topics.sh --describe --zookeeper localhost:2181 --topic hello-mrpei
Topic:hello-mrpei PartitionCount:1 ReplicationFactor:3 Configs:
Topic: hello-mrpei Partition: 0 Leader: 2 Replicas: 2,1,3 Isr: 2,1,3
通過jps -m查看當前運行的kafka進程
[root@hadoop001 kafka_2.11-0.9.0.0]# jps -m
13649 Kafka config/server-2.properties
13939 ConsoleConsumer --zookeeper localhost:2181 --from-beginning --topic hello-mrpei
14004 ConsoleProducer --broker-list localhost:9093 --topic hello-mrpei
12838 QuorumPeerMain /usr/server/zookeeper-3.4.5/bin/../conf/zoo.cfg
13706 Kafka config/server-3.properties
14026 Jps -m
13484 Kafka config/server-1.properties
使用kill命令結束進程號爲13484的broker節點1
kill -9 13484
jps -m查看到broker 1 已經結束
[root@hadoop001 kafka_2.11-0.9.0.0]# jps -m
13649 Kafka config/server-2.properties
13939 ConsoleConsumer --zookeeper localhost:2181 --from-beginning --topic hello-mrpei
14004 ConsoleProducer --broker-list localhost:9093 --topic hello-mrpei
12838 QuorumPeerMain /usr/server/zookeeper-3.4.5/bin/../conf/zoo.cfg
14089 Jps -m
13706 Kafka config/server-3.properties
[root@hadoop001 kafka_2.11-0.9.0.0]#
查看topic信息:
[root@hadoop001 kafka_2.11-0.9.0.0]# ./bin/kafka-topics.sh --describe --zookeeper localhost:2181 --topic hello-mrpei
Topic:hello-mrpei PartitionCount:1 ReplicationFactor:3 Configs:
Topic: hello-mrpei Partition: 0 Leader: 2 Replicas: 2,1,3 Isr: 2,3
可以看到 Isr 存活的節點爲:2,3
發送消息測試
生產者:
消費者:
可以發現可以正常消費
現在我們再次結束一個broker進程,這次選擇結束leader節點,即節點 2
jps -m查看進程
[root@hadoop001 kafka_2.11-0.9.0.0]# jps -m
13649 Kafka config/server-2.properties
13939 ConsoleConsumer --zookeeper localhost:2181 --from-beginning --topic hello-mrpei
14004 ConsoleProducer --broker-list localhost:9093 --topic hello-mrpei
12838 QuorumPeerMain /usr/server/zookeeper-3.4.5/bin/../conf/zoo.cfg
13706 Kafka config/server-3.properties
14124 Jps -m
結束節點 2
kill -9 13649
jps -m
------------
13939 ConsoleConsumer --zookeeper localhost:2181 --from-beginning --topic hello-mrpei
14004 ConsoleProducer --broker-list localhost:9093 --topic hello-mrpei
14148 Jps -m
12838 QuorumPeerMain /usr/server/zookeeper-3.4.5/bin/../conf/zoo.cfg
13706 Kafka config/server-3.properties
查看topic信息:
[root@hadoop001 kafka_2.11-0.9.0.0]# ./bin/kafka-topics.sh --describe --zookeeper localhost:2181 --topic hello-mrpei
Topic:hello-mrpei PartitionCount:1 ReplicationFactor:3 Configs:
Topic: hello-mrpei Partition: 0 Leader: 3 Replicas: 2,1,3 Isr: 3
可以看到 Isr 存活的節點只剩下節點3,此時leader已經變爲節點3,此次省去選舉過程介紹。
消費測試:
生產者:
消費者:
消費仍然正常。
自此,kafka容錯高可用測試結束,經過生產環境的驗證kafka確實是高可用的消息中間件,今後的生產環境可以根據需要選用kafka。