Docker搭建Zookeeper
获取zookeeper
docker pull zookeeper
运行zookeeper
docker run -it -p2888:2888 -p2181:2181 --name=zookeeper zookeeper
自此zookeeper搭建完毕
从控制台返回的信息中，我们可以得知zookeeper的配置文件地址为 /conf/zoo.cfg，我们可以对zookeeper的配置进行自己的定制，这个我们以后有机会一起分析。
qinghai@localhost my_kata % docker run -it -p2888:2888 -p2181:2181 --name=zookeeper zookeeper
ZooKeeper JMX enabled by default
Using config: /conf/zoo.cfg
2020-09-09 07:20:37,460 [myid:] - INFO [main:QuorumPeerConfig@173] - Reading configuration from: /conf/zoo.cfg
2020-09-09 07:20:37,471 [myid:] - INFO [main:QuorumPeerConfig@450] - clientPort is not set
2020-09-09 07:20:37,471 [myid:] - INFO [main:QuorumPeerConfig@463] - secureClientPort is not set
2020-09-09 07:20:37,471 [myid:] - INFO [main:QuorumPeerConfig@479] - observerMasterPort is not set
2020-09-09 07:20:37,473 [myid:] - INFO [main:QuorumPeerConfig@496] - metricsProvider.className is org.apache.zookeeper.metrics.impl.DefaultMetricsProvider
2020-09-09 07:20:37,484 [myid:] - ERROR [main:QuorumPeerConfig@720] - Invalid configuration, only one server specified (ignoring)
2020-09-09 07:20:37,489 [myid:1] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3
2020-09-09 07:20:37,489 [myid:1] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 0
2020-09-09 07:20:37,490 [myid:1] - INFO [main:DatadirCleanupManager@101] - Purge task is not scheduled.
2020-09-09 07:20:37,490 [myid:1] - WARN [main:QuorumPeerMain@138] - Either no config or no quorum defined in config, running in standalone mode
2020-09-09 07:20:37,495 [myid:1] - INFO [main:ManagedUtil@44] - Log4j 1.2 jmx support found and enabled.
2020-09-09 07:20:37,504 [myid:1] - INFO [main:QuorumPeerConfig@173] - Reading configuration from: /conf/zoo.cfg
2020-09-09 07:20:37,504 [myid:1] - INFO [main:QuorumPeerConfig@450] - clientPort is not set
2020-09-09 07:20:37,505 [myid:1] - INFO [main:QuorumPeerConfig@463] - secureClientPort is not set
2020-09-09 07:20:37,505 [myid:1] - INFO [main:QuorumPeerConfig@479] - observerMasterPort is not set
2020-09-09 07:20:37,505 [myid:1] - INFO [main:QuorumPeerConfig@496] - metricsProvider.className is org.apache.zookeeper.metrics.impl.DefaultMetricsProvider
2020-09-09 07:20:37,508 [myid:1] - ERROR [main:QuorumPeerConfig@720] - Invalid configuration, only one server specified (ignoring)
2020-09-09 07:20:37,508 [myid:1] - INFO [main:ZooKeeperServerMain@122] - Starting server
2020-09-09 07:20:37,526 [myid:1] - INFO [main:ServerMetrics@62] - ServerMetrics initialized with provider org.apache.zookeeper.metrics.impl.DefaultMetricsProvider@7a675056
2020-09-09 07:20:37,529 [myid:1] - INFO [main:FileTxnSnapLog@124] - zookeeper.snapshot.trust.empty : false
2020-09-09 07:20:37,544 [myid:1] - INFO [main:ZookeeperBanner@42] -
2020-09-09 07:20:37,545 [myid:1] - INFO [main:ZookeeperBanner@42] - ______ _
2020-09-09 07:20:37,545 [myid:1] - INFO [main:ZookeeperBanner@42] - |___ / | |
2020-09-09 07:20:37,545 [myid:1] - INFO [main:ZookeeperBanner@42] - / / ___ ___ | | __ ___ ___ _ __ ___ _ __
2020-09-09 07:20:37,545 [myid:1] - INFO [main:ZookeeperBanner@42] - / / / _ \ / _ \ | |/ / / _ \ / _ \ | '_ \ / _ \ | '__|
2020-09-09 07:20:37,545 [myid:1] - INFO [main:ZookeeperBanner@42] - / /__ | (_) | | (_) | | < | __/ | __/ | |_) | | __/ | |
2020-09-09 07:20:37,546 [myid:1] - INFO [main:ZookeeperBanner@42] - /_____| \___/ \___/ |_|\_\ \___| \___| | .__/ \___| |_|
2020-09-09 07:20:37,546 [myid:1] - INFO [main:ZookeeperBanner@42] - | |
2020-09-09 07:20:37,546 [myid:1] - INFO [main:ZookeeperBanner@42] - |_|
2020-09-09 07:20:37,546 [myid:1] - INFO [main:ZookeeperBanner@42] -
Docker搭建kafka
由于kafka没有官方的docker镜像，所以我们使用docker版本的centos去制作一个kafka的docker镜像
获取centos的Docker镜像
docker pull centos
注
docker hub 官方最新的centos版本是centos8，如果我们要使用centos7可以指定tag来制定我们使用的centos版本，centos8相比较于7的版本，其中之一就是软件仓库管理软件的变化，centos7使用的 yum 更改为centos8中的dnf
docker pull centos:7
下载完成后，我们运行centos镜像
docker run it -p9092:9092 --name=kafka centos
同样，我们如果使用centos7的话，可以使用
docker run it -p9092:9092 --name=kafka centos:7
执行完成后，我们成功的进入了docker容器内部的centos命令行中
首先，我们更新一下软件列表
dnf update
更完成后，我们再去下载vim
dnf install vim
由于kafka需要java环境，我们需要安装openjdk
dnf install java
安装完成后，运行
java -version
可以看到返回结果
[root@0db103c94a5c /]# java -version
openjdk version "1.8.0_262"
OpenJDK Runtime Environment (build 1.8.0_262-b10)
OpenJDK 64-Bit Server VM (build 25.262-b10, mixed mode)
安装成功
让我们安装kafka吧
通过curl下载kafka
curl -O -L https://mirrors.tuna.tsinghua.edu.cn/apache/kafka/2.6.0/kafka_2.12-2.6.0.tgz
下载后解压
tar -zvxf kafka_2.12-2.6.0.tgz
这样我们就获得了一个kafka
解压完成后，我们来获取zookeeper的ip地址
使用contro+p+q来退出docker 内部容器控制台，返回值宿主机控制台
使用docker ps
qinghai@localhost software % docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES
0db103c94a5c centos "/bin/bash" 6 hours ago Up About an hour 0.0.0.0:9092->9092/tcp kafka
995242c5d83c zookeeper "/docker-entrypoint.…" 6 hours ago Up About an hour 0.0.0.0:2181->2181/tcp, 3888/tcp, 0.0.0.0:2888->2888/tcp, 8080/tcp zookeeper
我们要查看zookeeper的ip 那我们使用 docker inspect --format='{{.NetworkSettings.IPAddress}} CONTAINER ID
docker inspect --format='{{.NetworkSettings.IPAddress}} 995242c5d83c
结果
qinghai@localhost software % docker inspect --format='{{.NetworkSettings.IPAddress}}' zookeeper
172.17.0.2
那么我获取到的zookeeper的ip地址为：172.17.0.2
我们重新回到kafka容器内部
docker exec -it kafka /bin/bash
进入kafka的安装目录后，我们进入bin目录中
进入kafka的config的路径中
编辑server.properties文件
将zookeeper.connect=localhost:2181更改为zookeeper.connect=172.17.0.2:2181
启动kafka
./kafka-server-start.sh ../config/server.properties
我们会看到启动结果
上面的部分省略....
[2020-09-09 13:59:16,767] INFO [KafkaServer id=0] started (kafka.server.KafkaServer)
此时，我们使用contro+p+q重新进入kafka容器中
docker exec -it kafka /bin/bash
进入kafka的安装路径，在进入bin执行
[root@0db103c94a5c bin]# ./kafka-topics.sh --create --zookeeper 172.17.0.2:2181 --replication-factor 1 --partitions 1 --topic nanjolono
得到了结果，我们创建了一个名字为nanjolono的topic
Created topic nanjolono.
那么我们来查看是否成功了吧！
查看创建的topic
./kafka-topics.sh --list --zookeeper 172.17.0.2:2181
得到结果
nanjolono
创建成功！
发送一些消息
[root@0db103c94a5c bin]# ./kafka-console-producer.sh --broker-list localhost:9092 --topic nanjolono
>
如何验证我们是否接收到消息？
我们再次创建一个shell窗口
进入kafka容器中
docker exec -it kafka /bin/bash
进入kafka的安装目录，进入bin目录
./kafka-console-consumer.sh --bootstrap-server localhost:9092 --topic nanjolono --from-beginning
此时，我们在生产者控制台输入文字，消费者控制台能够成功接受到，就是成功啦！
お疲れ様でした!
感谢你的收看！我们成功的使用docker搭建了一个可以使用的kafka环境。