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2018-03-20 补充 kafka 和 zookeeper 内容
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‎markdown-file/Kafka-Install-And-Settings.md‎

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- <http://www.ituring.com.cn/article/499268>
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- <http://orchome.com/kafka/index>
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- <http://blog.51cto.com/wangchunyi/2046163>
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- <https://www.jianshu.com/p/263164fdcac7>
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- <http://www.bijishequ.com/detail/536308>
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- <http://lanxinglan.cn/2017/10/18/%E5%9C%A8Docker%E7%8E%AF%E5%A2%83%E4%B8%8B%E9%83%A8%E7%BD%B2Kafka/>
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- <https://www.cnblogs.com/ding2016/p/8282907.html>
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- <http://blog.csdn.net/fuyuwei2015/article/details/73379055>
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- <https://segmentfault.com/a/1190000012990954>

‎markdown-file/Vim-Install-And-Settings.md‎

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- `d$`，删除光标至 **行尾** 所有字符
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- `dG`，删除光标至 **文件尾** 所有字符
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- `3dd`，从当前光标开始，删掉 3 行
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- `echo > aa.txt`，从 bash 角度清空文件内容，这个比较高效
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- 复制
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- `y`，复制光标所选字符
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- `yw`，复制光标后单词
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- 在假设你已经备份好你的 Vim 配置文件后，使用该配置文件：`curl https://raw.githubusercontent.com/wklken/vim-for-server/master/vimrc > ~/.vimrc`
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- 效果如下：
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- ![vim-for-server](https://raw.githubusercontent.com/wklken/gallery/master/vim/vim-for-server.png)
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- 需要特别注意的是，如果你平时粘贴内容到终端 Vim 出现缩进错乱，一般需要这样做：
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- 进入 vim 后，按 `F5`，然后 `shirt + insert` 进行粘贴。这种事就不会错乱了。
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- 原因是：`vim ~/.vimrc` 中有一行这样的设置：`set pastetoggle=<F5>`
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## 资料
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‎markdown-file/Zookeeper-Install.md‎

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# Zookeeper 安装
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## Docker 部署 Zookeeper
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#### 单个实例
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- 官网仓库：<https://hub.docker.com/r/library/zookeeper/>
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- 单个实例：`docker run -d --restart always --name one-zookeeper -p 2181:2181 -v /etc/localtime:/etc/localtime zookeeper:latest`
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- 默认端口暴露是：`This image includes EXPOSE 2181 2888 3888 (the zookeeper client port, follower port, election port respectively)`
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- 容器中的几个重要目录（有需要挂载的可以指定）：
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- `/data`
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- `/datalog`
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- `/conf`
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#### 单机多个实例（集群）
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- 创建 docker compose 文件：`vim zookeeper.yml`
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- 下面内容来自官网仓库：<https://hub.docker.com/r/library/zookeeper/>
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```
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version: '3.1'
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services:
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zoo1:
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image: zookeeper
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restart: always
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hostname: zoo1
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ports:
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- 2181:2181
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environment:
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ZOO_MY_ID: 1
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ZOO_SERVERS: server.1=0.0.0.0:2888:3888 server.2=zoo2:2888:3888 server.3=zoo3:2888:3888
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zoo2:
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image: zookeeper
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restart: always
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hostname: zoo2
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ports:
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- 2182:2181
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environment:
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ZOO_MY_ID: 2
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ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=0.0.0.0:2888:3888 server.3=zoo3:2888:3888
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zoo3:
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image: zookeeper
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restart: always
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hostname: zoo3
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ports:
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- 2183:2181
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environment:
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ZOO_MY_ID: 3
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ZOO_SERVERS: server.1=zoo1:2888:3888 server.2=zoo2:2888:3888 server.3=0.0.0.0:2888:3888
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```
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- 启动：`docker-compose -f zookeeper.yml -p zk_test up -d`
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- 参数 -p zk_test 表示这个 compose project 的名字，等价于：`COMPOSE_PROJECT_NAME=zk_test docker-compose -f zookeeper.yml up -d`
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- 不指定项目名称，Docker-Compose 默认以当前文件目录名作为应用的项目名
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- 报错是正常情况的。
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- 停止：`docker-compose -f zookeeper.yml -p zk_test stop`
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#### 先安装 nc 再来校验 zookeeper 集群情况
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- 环境：CentOS 7.4
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- 官网下载：<https://nmap.org/download.html>，找到 rpm 包
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- 当前时间（201803）最新版本下载：`wget https://nmap.org/dist/ncat-7.60-1.x86_64.rpm`
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- 安装：`sudo rpm -i ncat-7.60-1.x86_64.rpm`
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- ln 下：`sudo ln -s /usr/bin/ncat /usr/bin/nc`
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- 检验：`nc --version`
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#### 校验
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- 命令：`echo stat | nc 127.0.0.1 2181`，得到如下信息：
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```
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Zookeeper version: 3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
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Clients:
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/172.21.0.1:58872[0](queued=0,recved=1,sent=0)
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Latency min/avg/max: 0/0/0
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Received: 1
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Sent: 0
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Connections: 1
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Outstanding: 0
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Zxid: 0x100000000
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Mode: follower
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Node count: 4
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```
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- 命令：`echo stat | nc 127.0.0.1 2182`，得到如下信息：
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```
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Zookeeper version: 3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
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Clients:
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/172.21.0.1:36190[0](queued=0,recved=1,sent=0)
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Latency min/avg/max: 0/0/0
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Received: 1
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Sent: 0
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Connections: 1
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Outstanding: 0
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Zxid: 0x500000000
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Mode: follower
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Node count: 4
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```
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- 命令：`echo stat | nc 127.0.0.1 2183`，得到如下信息：
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```
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Zookeeper version: 3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
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Clients:
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/172.21.0.1:33344[0](queued=0,recved=1,sent=0)
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Latency min/avg/max: 0/0/0
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Received: 1
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Sent: 0
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Connections: 1
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Outstanding: 0
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Zxid: 0x500000000
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Mode: leader
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Node count: 4
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```
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#### 多机多个实例（集群）
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- 三台机：
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- 10.129.11.12 zk1
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- 10.129.11.13 zk2
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- 10.129.11.14 zk3
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- 节点 1：
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```
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docker run -d \
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-v /data/docker/zookeeper/data:/data \
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-v /data/docker/zookeeper/log:/datalog \
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-e ZOO_MY_ID=1 \
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-e "ZOO_SERVERS=server.1=10.129.11.12:2888:3888 server.2=10.129.11.13:2888:3888 server.3=10.129.11.14:2888:3888" \
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--name=zookeeper1 --net=host --restart=always zookeeper
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```
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- 节点 2：
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```
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docker run -d \
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-v /data/docker/zookeeper/data:/data \
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-v /data/docker/zookeeper/log:/datalog \
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-e ZOO_MY_ID=2 \
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-e "ZOO_SERVERS=server.1=10.129.11.12:2888:3888 server.2=10.129.11.13:2888:3888 server.3=10.129.11.14:2888:3888" \
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--name=zookeeper2 --net=host --restart=always zookeeper
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```
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- 节点 3：
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```
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docker run -d \
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-v /data/docker/zookeeper/data:/data \
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-v /data/docker/zookeeper/log:/datalog \
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-e ZOO_MY_ID=3 \
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-e "ZOO_SERVERS=server.1=10.129.11.12:2888:3888 server.2=10.129.11.13:2888:3888 server.3=10.129.11.14:2888:3888" \
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--name=zookeeper3 --net=host --restart=always zookeeper
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```
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## 需要环境
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- JDK 安装
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Using config: /usr/program/zookeeper/zookeeper-3.4.8/bin/../conf/zoo.cfg
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Mode: follower 或者 Mode: leader
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```
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## 资料
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- <https://liwei.io/2017/07/19/zookeeper-cluster-in-docker/>

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