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docker搭建Hadoop CDH高可用集群实现

Docker 2022-09-01 23:09:53 71

首先我们为了之后继续搭建软件,这里没有使用docker-compose,而是通过构建四台centos,再在里面搭建我们所需要的组件

宿主机最好提供10 GB的RAM,硬盘占用大概会在40G以上

本次采用的在线安装方式,cdh为6.3.2版本,系统为centos7.4, docker节点可以为任意多个,下文将以3个docker容器为示例进行展示。此方法也可用在docker swarm上,docker容器能够互连,网络互通即可

离线安装包地址:

链接: https://pan.baidu.com/s/1vMm0yMYya2vhbEabeJMPHQ 提取码: xbrx

0. docker安装

卸载(可选)

如果之前安装过旧版本的Docker,可以使用下面命令卸载:

yum remove docker \

                  docker-client \

                  docker-client-latest \

                  docker-common \	
                  docker-latest \

                  docker-latest-logrotate \

                  docker-logrotate \

                  docker-selinux \

                  docker-engine-selinux \

                  docker-engine \

                  docker-ce

安装docker

首先需要大家虚拟机联网,安装yum工具

yum install -y yum-utils \

           device-mapper-persistent-data \

           lvm2 --skip-broken

然后更新本地镜像源:

# 设置docker镜像源
yum-config-manager \

    --add-repo \

    https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
# 第二步     
sed -i 's/download.docker.com/mirrors.aliyun.com\/docker-ce/g' /etc/yum.repos.d/docker-ce.repo
# 第三步
yum makecache fast

然后输入命令:

yum install -y docker-ce

docker-ce为社区免费版本。稍等片刻,docker即可安装成功。

1. 构建Centos-cdh镜像

宿主机初始化

yum install -y wget   \

&& mkdir -p /etc/yum.repos.d/repo_bak   \

&& mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/repo_bak/  \

&& wget -O /etc/yum.repos.d/CentOS-Base.repo http://mirrors.aliyun.com/repo/Centos-7.repo  \

&& wget -O /etc/yum.repos.d/epel.repo http://mirrors.aliyun.com/repo/epel-7.repo    \

&& yum clean all   \

&& yum makecache   \

&& yum update –y    

构建容器的Dockerfile文件(创建这个文件)

FROM docker.io/ansible/centos7-ansible
RUN yum -y install openssh-server
RUN yum -y install bind-utils
RUN yum -y install which
RUN yum -y install sudo

在Dockerfile同级目录执行:

docker build -t centos7-cdh .

生成要用的基础centos7的镜像

接着我们给镜像创建一个网桥

docker network create --subnet=172.10.0.0/16 hadoop_net && docker network ls

启动容器

docker run -d  \

--add-host cm.hadoop:172.10.0.2 \

--net hadoop_net \

--ip 172.10.0.2 \

-h cm.hadoop \

-p 10022:22 \

-p 7180:7180 \

--restart always \

--name cm.hadoop \

--privileged \

centos7-cdh \

/usr/sbin/init \

&& docker ps  

参数解释:

  • run -d # 后台启动
  • --add-host cm.hadoop:172.10.0.2 # 给容器分配一个固定的ip,主机名为:cm.hadoop
  • --net hadoop_net # 将容器加入到上一步创建的网桥中
  • -p # 端口映射
  • --restart always # docker重启后会自动开启此容器
  • --name cm.hadoop # 给容器起名字,在docker中可以用主机名代替ip镜像访问
  • --privileged # 声明此容器可以定制化,例如使container内的root拥有真正的root权限等

2. 容器安装ClouderaManager

2.1 初始化环境

我们进入容器,配置一些东西

docker exec -it cm.hadoop bash

将root的登录密码改为root

$ su root
$ passwd
$ root
$ root

安装基础环境

yum install -y kde-l10n-Chinese telnet reinstall glibc-common vim wget ntp net-tools && yum clean all

此步如果出错,请尝试容器是否可以正常联网,检查docker网桥设置

2.2 配置中文环境变量

vim ~/.bashrc ,在末尾添加

export LC_ALL=zh_CN.utf8   
export LANG=zh_CN.utf8    
export LANGUAGE=zh_CN.utf8  

执行

localedef -c -f UTF-8 -i zh_CN zh_CN.utf8 \

&& source ~/.bashrc \

&& echo $LANG

2.3 设置NTP时间同步服务

这一步是必须要做的,因为hadoop集群如果时间不同步会出现通讯失败的情况

安装ntp

yum install ntp -y

同步时间

ntpdate -u ntp1.aliyun.com 

修改时区

ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

再创建一个定时任务,用于定时同步时间(防止虚拟机停止后时间异常)

crontab  -e
# 添加
0 */2 * * * /usr/sbin/ntpdate ntp1.aliyun.com 

启动ntp服务

systemctl start ntpd && \

systemctl enable ntpd &&  \

date

2.4 安装mysql

使用wget安装(也可以单独部署,单独部署这里不再赘述):

mkdir -p /root/hadoop__CHD/mysql \

&& wget -O /root/hadoop_CHD/mysql/mysql-5.7.27-1.el7.x86_64.rpm-bundle.tar \

https://dev.mysql.com/get/Downloads/MySQL-5.7/mysql-5.7.27-1.el7.x86_64.rpm-bundle.tar \

&& ls /root/hadoop_CHD/mysql

使用wget会非常的慢,我们可以上传给宿主机,然后通过docker命令拷贝给centos-chd

# 前提是容器的/root/hadoop_CHD/mysql目录必须事先创建。
docker cp mysql-5.7.27-1.el7.x86_64.rpm-bundle.tar {容器ID}:/root/hadoop_CHD/mysql

准备MySQL JDBC驱动

mkdir -p /root/hadoop_CHD/mysql-jdbc \

&& wget -O /root/hadoop_CHD/mysql-jdbc/mysql-connector-java-5.1.48.tar.gz \

https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-5.1.48.tar.gz  \

&& ls /root/hadoop_CHD/mysql-jdbc

2.5 准备Cloudera-Manager安装包

这样下载很慢,建议用finalshell等工具直接从自己的电脑上上传到虚拟机中,直接连接宿主机的10022端口即可

mkdir -p /root/hadoop_CHD/cloudera-repos \

&& wget -O /root/hadoop_CHD/cloudera-repos/allkeys.asc \

https://archive.cloudera.com/cm6/6.3.0/allkeys.asc \

&& wget -O /root/hadoop_CHD/cloudera-repos/cloudera-manager-agent-6.3.0-1281944.el7.x86_64.rpm \

https://archive.cloudera.com/cm6/6.3.0/redhat7/yum/RPMS/x86_64/cloudera-manager-agent-6.3.0-1281944.el7.x86_64.rpm \

&& wget -O /root/hadoop_CHD/cloudera-repos/cloudera-manager-daemons-6.3.0-1281944.el7.x86_64.rpm \

https://archive.cloudera.com/cm6/6.3.0/redhat7/yum/RPMS/x86_64/cloudera-manager-daemons-6.3.0-1281944.el7.x86_64.rpm \

&& wget -O /root/hadoop_CHD/cloudera-repos/cloudera-manager-server-6.3.0-1281944.el7.x86_64.rpm \

https://archive.cloudera.com/cm6/6.3.0/redhat7/yum/RPMS/x86_64/cloudera-manager-server-6.3.0-1281944.el7.x86_64.rpm \

&& wget -O /root/hadoop_CHD/cloudera-repos/cloudera-manager-server-db-2-6.3.0-1281944.el7.x86_64.rpm \

https://archive.cloudera.com/cm6/6.3.0/redhat7/yum/RPMS/x86_64/cloudera-manager-server-db-2-6.3.0-1281944.el7.x86_64.rpm \

&& wget -O /root/hadoop_CHD/cloudera-repos/enterprise-debuginfo-6.3.0-1281944.el7.x86_64.rpm \

https://archive.cloudera.com/cm6/6.3.0/redhat7/yum/RPMS/x86_64/enterprise-debuginfo-6.3.0-1281944.el7.x86_64.rpm \

&& wget -O /root/hadoop_CHD/cloudera-repos/oracle-j2sdk1.8-1.8.0+update181-1.x86_64.rpm \

https://archive.cloudera.com/cm6/6.3.0/redhat7/yum/RPMS/x86_64/oracle-j2sdk1.8-1.8.0+update181-1.x86_64.rpm \

&& ll /root/hadoop_CHD/cloudera-repos

准备Parcel包

mkdir -p /root/hadoop_CHD/parcel \

&& wget -O /root/hadoop_CHD/parcel/ CDH-6.3.2-1.cdh6.3.2.p0.1605554-el7.parcel \

https://archive.cloudera.com/cdh6/6.3.2/parcels/CDH-6.3.2-1.cdh6.3.2.p0.1605554-el7.parcel \

&& wget -O /root/hadoop_CHD/parcel/manifest.json \

https://archive.cloudera.com/cdh6/6.3.2/parcels/manifest.json \

&& ll /root/hadoop_CHD/parcel

搭建本地yum源

 yum -y install httpd createrepo  \

&& systemctl start httpd \

&& systemctl enable httpd \

&& cd /root/hadoop_CHD/cloudera-repos/ && createrepo . \

&& mv /root/hadoop_CHD/cloudera-repos /var/www/html/ \

&& yum clean all \

&& ll /var/www/html/cloudera-repos

2.6 安装jdk

yum install -y java-1.8.0-openjdk-devel.x86_64

查看一下:

java -version

jdk会默认安装在/usr/lib/jvm目录下:

这样安装没有配置JAVA_HOME,我们需要进一步配置,不然后面安装会报错

(
cat <<EOF
#set java environment
JAVA_HOME=/usr/lib/jvm/jre-1.8.0-openjdk
PATH=$PATH:$JAVA_HOME/bin
CLASSPATH=.:$JAVA_HOME/lib/dt.jar:$JAVA_HOME/lib/tools.jar
export JAVA_HOME CLASSPATH PATH
EOF
) >> /etc/profile && source /etc/profile && java -version

2.7 启动前准备

安装配置MySQL数据库(采用docker独立安装跳过此步)

cd /root/hadoop_CHD/mysql/ \

&& tar -xvf mysql-5.7.27-1.el7.x86_64.rpm-bundle.tar \

&& yum install -y libaio numactl \

&& rpm -ivh mysql-community-common-5.7.27-1.el7.x86_64.rpm \

&& rpm -ivh mysql-community-libs-5.7.27-1.el7.x86_64.rpm   \

&& rpm -ivh mysql-community-client-5.7.27-1.el7.x86_64.rpm \

&& rpm -ivh mysql-community-server-5.7.27-1.el7.x86_64.rpm \

&& rpm -ivh mysql-community-libs-compat-5.7.27-1.el7.x86_64.rpm \

&& echo character-set-server=utf8 >> /etc/my.cnf \

&& rm -rf /root/hadoop_CHD/mysql/ \

&& yum clean all \

&& rpm -qa |grep mysql

建数据库表

(
cat <<EOF
set password for root@localhost = password('123456Aa.');
grant all privileges on *.* to 'root'@'%' identified by '123456Aa.';
flush privileges;
CREATE DATABASE scm DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE amon DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE rman DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE hue DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE metastore DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE sentry DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE nav DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE navms DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE oozie DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
GRANT ALL ON scm.* TO 'scm'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON amon.* TO 'amon'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON rman.* TO 'rman'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON hue.* TO 'hue'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON metastore.* TO 'hive'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON sentry.* TO 'sentry'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON nav.* TO 'nav'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON navms.* TO 'navms'@'%' IDENTIFIED BY '123456Aa.';
GRANT ALL ON oozie.* TO 'oozie'@'%' IDENTIFIED BY '123456Aa.';
SHOW DATABASES;
EOF
) >> /root/c.sql

保存为:/root/c.sql

获取MySQL初始密码

systemctl start mysqld && grep password /var/log/mysqld.log | sed 's/.*(............)$/1/'

执行SQL脚本

mysql -u root -p

输入查询出的默认密码,然后执行:

source /root/c.sql 

配置mysql jdbc驱动

$ mkdir -p /usr/share/java/
$ cd /root/hadoop_CHD/mysql-jdbc/   
$ tar -zxvf mysql-connector-java-5.1.48.tar.gz 
$ cp  /root/hadoop_CHD/mysql-jdbc/mysql-connector-java-5.1.48/mysql-connector-java-5.1.48-bin.jar /usr/share/java/mysql-connector-java.jar 
$ rm -rf /root/hadoop_CHD/mysql-jdbc/ 
$ ls /usr/share/java/

这里有坑,就是这个驱动版本不能太高,刚开始我的是5.1.47的驱动,然后就会报错,换了5.1.6的就好了(手动上传),还有就是驱动不能带版本号

名字要为mysql-connector-java.jar

安装Cloudera Manager

(
cat <<EOF
[cloudera-manager]
name=Cloudera Manager 6.3.0
baseurl=http://172.10.0.2/cloudera-repos/
gpgcheck=0
enabled=1
EOF
) >> /etc/yum.repos.d/cloudera-manager.repo \

&& yum clean all \

&& yum makecache \

&& yum install -y cloudera-manager-daemons cloudera-manager-agent cloudera-manager-server \

&& yum clean all \

&& rpm -qa | grep cloudera-manager

配置parcel库

cd /opt/cloudera/parcel-repo/;mv /root/hadoop_CHD/parcel/* ./   \

&& sha1sum CDH-6.3.2-1.cdh6.3.2.p0.1605554-el7.parcel | awk '{ print $1 }' > CDH-6.3.2-1.cdh6.3.2.p0.1605554-el7.parcel.sha \

&& rm -rf /root/hadoop_CHD/parcel/  \

&& chown -R cloudera-scm:cloudera-scm /opt/cloudera/parcel-repo/*  \

&& ll /opt/cloudera/parcel-repo/

初始化scm库

/opt/cloudera/cm/schema/scm_prepare_database.sh mysql scm scm 123456Aa.

接着上面的,如果驱动没有问题

启动cloudera-server服务

systemctl start cloudera-scm-server.service \

&& sleep 2 \

&& tail -f /var/log/cloudera-scm-server/cloudera-scm-server.log | grep "INFO WebServerImpl:com.cloudera.server.cmf.WebServerImpl: Started Jetty server"

这里如果出错,请多看错误日志,一般为驱动未找到,或者是bean构建失败等等,如果失败不要反复重启服务,因为scm数据库里面的数据很可能会出现问题,应该删除该数据库再重新启动

到这里如果没有什么问题,你可以在你的浏览器里面看到页面,http://IP:7180/cmf/login 账号密码:admin/admin

先别急着操作,先配置两个slave结点

3. 配置CDH的worker节点

以下为worker容器的准备方式,若为多个时,重复执行以下步骤,创建多个worker节点

3.1 创建多个worker容器

创建2个work容器

Worker-1:

docker run -d  \

--add-host cm.hadoop:172.10.0.2 \

--add-host cdh01.hadoop:172.10.0.3 \

--net hadoop_net \

--ip 172.10.0.3 \

-h cdh01.hadoop \

-p 20022:22 \

--restart always \

--name cdh01.hadoop \

--privileged \

centos7-cdh \

/usr/sbin/init \

&& docker ps

Worker-2:

docker run -d \

--add-host cm.hadoop:172.10.0.2 \

--add-host cdh02.hadoop:172.10.0.4 \

--net hadoop_net \

--ip 172.10.0.4 \

-h cdh02.hadoop \

-p 30022:22 \

--restart always \

--name cdh02.hadoop \

--privileged \

centos7-cdh \

/usr/sbin/init \

&& docker ps

到这里正常的话我们就有三台主机了

和之前的操作一样,先安装基本工具

上一步创建的所有容器均执行,修改root的登录密码改为root

$ su root
$ passwd
$ root
$ root

然后执行

配置中文环境

yum install -y kde-l10n-Chinese telnet reinstall glibc-common vim wget ntp net-tools && yum clean all

3.2 环境配置

配置中文环境变量

(
cat <<EOF
export LC_ALL=zh_CN.utf8
export LANG=zh_CN.utf8
export LANGUAGE=zh_CN.utf8
EOF
) >> ~/.bashrc  \

&& localedef -c -f UTF-8 -i zh_CN zh_CN.utf8   \

&& source ~/.bashrc   \

&& echo $LANG

这一步是必须要做的,因为hadoop集群如果时间不同步会出现通讯失败的情况

安装ntp

yum install ntp -y

同步时间

ntpdate -u ntp1.aliyun.com 

修改时区

ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime

再创建一个定时任务,用于定时同步时间(防止虚拟机停止后时间异常)

crontab -e# 添加0 */2 * * * /usr/sbin/ntpdate ntp1.aliyun.com 

启动ntp服务

systemctl start ntpd && \

systemctl enable ntpd &&  \

date

配置MySQL JDBC

这里为了防止出错,建议配置和master结点一样的驱动,且不要带版本号

mkdir -p /usr/share/java/ 

上传驱动即可

修改CM主机的host文件

这样我们可以很方便的使用后面的名字访问这些主机

echo "172.10.0.3      cdh01.hadoop cdh01" >> /etc/hosts
echo "172.10.0.4      cdh02.hadoop cdh02" >> /etc/hosts

这里我们还可以配置一下免密码登录

4. CM管理平台创建CDH集群

4.1 登陆CM管理平台

http://IP:7180/cmf/login 账号密码:admin/admin

欢迎界面

此面一直点击继续,需要同意条款的同意条款

然后就可以来到集群安装的欢迎界面

我们来安装集群

选择继续,并给集群起一个名字

设置主机地址: 172.10.0.[2-4]

选择存储

自定义存储库:http://172.10.0.2/cloudera-repos

Jdk安装

SSH凭据,密码为容器root用户的登录密码,此处为root

安装代理

安装大数据组件

集群状态检查

集群设置

选择你要安装的组件

选择好你要安装的大数据组件,然后点继续

这里如果选择了hive之类的组件,需要在cm结点上创建一个数据库,可以用组件名命名

CREATE DATABASE scm DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
CREATE DATABASE hive DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
grant all privileges on scm.* to scm@'localhost' identified by '密码';
grant all privileges on scm.* to scm@'%' identified by '密码';
grant all privileges on hive.* to hive@'localhost' identified by '密码';
grant all privileges on hive.* to hive@'%' identified by '密码';
CREATE DATABASE hue DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
grant all privileges on hue.* to hue@'%' identified by '密码';
grant all privileges on hue.* to hue@'localhost' identified by '密码2';
CREATE DATABASE rm DEFAULT CHARACTER SET utf8 DEFAULT COLLATE utf8_general_ci;
grant all privileges on rm.* to rm@'localhost' identified by '密码';
grant all privileges on rm.* to rm@'%' identified by '密码';
flush privileges;

红色表示必填的项目

Datanode-> /dfs/datanode

Namenode-> /dfs/namenode

HDFS检查点-> /dfs/checkpoint

NodeManager 本地目录-> /dfs/nodemanager

然后就等待集群构建完成!

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