Kafka 集群部署（CentOS 单机模拟版）
文章目录
- 0.前置说明
- 1.安装Java11
- 2.集群部署
- 2.1 安装ZooKeeper
- 2.2 安装Kafka
- 2.3 封装启动脚本
0.前置说明
由于我们手里只有一台Linux机器，所以我们实现的是简单的单机模拟的集群部署，通过修改配置文件，启动 3 个 kafka 时用到 3 个不同的端口（9091，9092，9093）。
1.安装Java11
- 切换到你的
工作目录下执行：
yum install java-11-openjdk -y
- 添加环境变量；
export JAVA_HOME=/usr/lib/jvm/java-11-openjdk-11.0.23.0.9-3.tl3.x86_64
export PATH=$PATH:$JAVA_HOME/bin
- 让你的环境变量生效；
source /etc/profile
- 测试是否安装成功；
java -version
openjdk version "11.0.23" 2024-04-16 LTS
OpenJDK Runtime Environment (Red_Hat-11.0.23.0.9-2) (build 11.0.23+9-LTS)
OpenJDK 64-Bit Server VM (Red_Hat-11.0.23.0.9-2) (build 11.0.23+9-LTS, mixed mode, sharing)
2.集群部署
- 在你的工作目录下新建目录
cluster（集群）；
mkdir cluster
- 进入
cluster目录下，下载 kafka 安装包kafka-3.6.1-src.tgz并解压。
rz -E # 上传本地安装包
tar -zxf kafka_2.12-3.6.1.tgz
- 改名为
kafka；
mv kafka_2.12-3.6.1 kafka
2.1 安装ZooKeeper
- 修改文件夹名为
zookeeper；
因为 kafka 内置了 ZooKeeper 软件，所以此处将解压缩的文件作为 ZooKeeper 软件使用。
mv kafka/ zookeeper
- 修改
config/zookeeper.properties文件;
cd zookeeper/
vim config/zookeeper.properties
- 修改
dataDir，zookeeper 数据的存储文件。
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# the directory where the snapshot is stored.
dataDir=/root/cluster/zookeeper-data/zookeeper
# the port at which the clients will connect
clientPort=2181
# disable the per-ip limit on the number of connections since this is a non-production config
maxClientCnxns=0
# Disable the adminserver by default to avoid port conflicts.
# Set the port to something non-conflicting if choosing to enable this
admin.enableServer=false
# admin.serverPort=8080
2.2 安装Kafka
- 将上面解压缩的文件复制一份，改名为
broke-1；
mv kafka_2.12-3.6.1/ broker-1
ll
total 8
drwxr-xr-x 7 root root 4096 Nov 24 17:43 broker-1
drwxr-xr-x 7 root root 4096 Nov 24 17:43 zookeeper
- 修改
config/server.properties配置文件;
vim broker-1/config/server.properties
############################# Server Basics ############################## The id of the broker. This must be set to a unique integer for each broker.
broker.id=1 # kafka 节点数字标识，集群内具有唯一性
#......############################# Socket Server Settings ############################## The address the socket server listens on. If not configured, the host name will be equal to the value of
# java.net.InetAddress.getCanonicalHostName(), with PLAINTEXT listener name, and port 9092.
# FORMAT:
# listeners = listener_name://host_name:port
# EXAMPLE:
# listeners = PLAINTEXT://your.host.name:9092
listeners=PLAINTEXT://:9091
#.......
############################# Log Basics ############################## A comma separated list of directories under which to store log files
log.dirs=/root/cluster/broker-data/broker-1 # 监听器 9091 为本地端口，如果冲突，请重新指定
# .......
############################# Zookeeper ############################## Zookeeper connection string (see zookeeper docs for details).
# This is a comma separated host:port pairs, each corresponding to a zk
# server. e.g. "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002".
# You can also append an optional chroot string to the urls to specify the
# root directory for all kafka znodes.
zookeeper.connect=localhost:2181 # 数据文件路径，如果不存在，会自动创建# Timeout in ms for connecting to zookeeper
zookeeper.connection.timeout.ms=18000 # ZooKeeper 软件连接地址，2181 为默认的ZK 端口号 /kafka 为ZK 的管理节点- 同样的步骤，复制一份
broker-2与broker-3，并修改配置文件。
# broker-2
############################# Server Basics ############################## The id of the broker. This must be set to a unique integer for each broker.
broker.id=2 # kafka 节点数字标识，集群内具有唯一性
#......############################# Socket Server Settings ############################## The address the socket server listens on. If not configured, the host name will be equal to the value of
# java.net.InetAddress.getCanonicalHostName(), with PLAINTEXT listener name, and port 9092.
# FORMAT:
# listeners = listener_name://host_name:port
# EXAMPLE:
# listeners = PLAINTEXT://your.host.name:9092
listeners=PLAINTEXT://:9092
#.......
############################# Log Basics ############################## A comma separated list of directories under which to store log files
log.dirs=/root/cluster/broker-data/broker-2 # 监听器 9091 为本地端口，如果冲突，请重新指定
# .......
############################# Zookeeper ############################## Zookeeper connection string (see zookeeper docs for details).
# This is a comma separated host:port pairs, each corresponding to a zk
# server. e.g. "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002".
# You can also append an optional chroot string to the urls to specify the
# root directory for all kafka znodes.
zookeeper.connect=localhost:2181 # 数据文件路径，如果不存在，会自动创建# Timeout in ms for connecting to zookeeper
zookeeper.connection.timeout.ms=18000 # ZooKeeper 软件连接地址，2181 为默认的ZK 端口号 /kafka 为ZK 的管理节点
# broker-3
############################# Server Basics ############################## The id of the broker. This must be set to a unique integer for each broker.
broker.id=3 # kafka 节点数字标识，集群内具有唯一性
#......############################# Socket Server Settings ############################## The address the socket server listens on. If not configured, the host name will be equal to the value of
# java.net.InetAddress.getCanonicalHostName(), with PLAINTEXT listener name, and port 9092.
# FORMAT:
# listeners = listener_name://host_name:port
# EXAMPLE:
# listeners = PLAINTEXT://your.host.name:9092
listeners=PLAINTEXT://:9093
#.......
############################# Log Basics ############################## A comma separated list of directories under which to store log files
log.dirs=/root/cluster/broker-data/broker-3 # 监听器 9091 为本地端口，如果冲突，请重新指定
# .......
############################# Zookeeper ############################## Zookeeper connection string (see zookeeper docs for details).
# This is a comma separated host:port pairs, each corresponding to a zk
# server. e.g. "127.0.0.1:3000,127.0.0.1:3001,127.0.0.1:3002".
# You can also append an optional chroot string to the urls to specify the
# root directory for all kafka znodes.
zookeeper.connect=localhost:2181 # 数据文件路径，如果不存在，会自动创建# Timeout in ms for connecting to zookeeper
zookeeper.connection.timeout.ms=18000 # ZooKeeper 软件连接地址，2181 为默认的ZK 端口号 /kafka 为ZK 的管理节点
2.3 封装启动脚本
因为 Kafka 启动前，必须先启动 ZooKeeper，并且Kafka集群中有多个节点需要启动，所以启动过程比较繁琐，这里我们将启动的指令进行封装。
- 在
zookeeper文件夹下创建zk.sh批处理文件；
cd zookeeper
vim zk.sh## zk.sh
./bin/zookeeper-server-start.sh config/zookeeper.propertieschmod +x zk.sh
- 在
broker-1，broker-2，broker-3文件夹下分别创建kfk.sh批处理文件；
cd broker-1
vim kfk.sh## kfk.sh
./bin/kafka-server-start.sh config/server.propertieschmod +x kfk.sh
- 在
cluster文件夹下创建cluster.sh批处理文件，用于启动 kafka 集群。
vim cluster.sh
# cluster.sh
cd zookeeper
./zk.sh
cd ../broker-1
./kfk.sh
cd ../broker-2
./kfk.sh
cd ../broker-3
./kfk.sh
chmod +x cluster.sh
- 在
cluster文件夹下创建cluster-clear.sh批处理文件，用于清理和重置 kafka 数据。
vim cluster-clear.sh# cluster-clear.sh
rm -rf zookeeper-data
rm -rf broker-datachmod +x cluster-clear.sh
- 在
cluster目录下，运行./cluster.sh文件即可启动集群。
# 启动集群
./cluster# 查看是否启动成功，如果新建了data文件，说明启动成功了
ll zookeeper-data/
total 4
drwxr-xr-x 3 root root 4096 May 27 10:20 zookeeperll broker-data/
total 12
drwxr-xr-x 2 root root 4096 May 27 10:21 broker-1
drwxr-xr-x 2 root root 4096 May 27 10:21 broker-2
drwxr-xr-x 2 root root 4096 May 27 10:21 broker-3
- 当我们想要关闭集群时，不仅要清理 zookeeper 和 kafka 的
数据文件，还有kill -9结束 zookeeper 进程与 kakfa 进程，这需要我们手动逐一kill。
ps axj | grep zookeeper
kill -9 #zookeeper的PIDps axj | grep kafka
kill -9 #3个kafka节点的PID