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大数据：
- CDH详细安装步骤
- CDH集群完全卸载过程
- CDH6集群详细部署过程
- CDH6彻底删除清空
- kafka基本使用及命令
- sparkstreaming+kafka实时计算例子(一)结果写回kafka
- sparkstreaming+kafka实时计算例子(二)结果写回redis
CDH集群卸载过程
1.成功停止集群
2.解除并移出parcels
(先删除parcels包，再删cluster集群)
(1)成功停止集群后，点击图标
(2)点击停用
(3)停用集群上CDH
(4)移出CDH
此步骤删除节点上 /opt/cloudera/parcels 目录下的内容
(5)在“已下载”状态下删除本地包
即删除节点 /opt/cloudera/parcel-repo 下的内容(CDH parcels安装包)
3.删除集群
删除成功后
4.停止Cloudera Manager Server和数据库
systemctl stop cloudera-scm-server
(如果使用db postgresql则需要停止服务：systemctl stop cloudera-scm-server-db-2)
5.卸载Cloudera Manager Server
yum remove cloudera-manager-server
(如果使用db postgresql则需要移出该服务)
6.停止所有节点上Cloudera Manager Agent服务
systemctl stop cloudera-scm-agent
7.卸载所有节点
yum remove 'cloudera-manager-*'
8.在所有节点杀死相关进程
9. 在所有节点移出Cloudera Manager所有用户数据
umount cm_processes
(第一次会正常运行)
10.删除相应数据文件夹
rm -rf
/var/lib/cloudera*
/var/log/cloudera*
/var/run/cloudera*
/etc/cloudera*
/var/cache/yum/x86_64//cloudera (每个节点*路径不同)
(/usr/share/cmf/与/usr/lib64/cmf/若存在也需删除)
(1)公共目录
rm -rf /var/lib/cloudera* /var/log/cloudera* /var/run/cloudera* /etc/cloudera* /usr/share/cmf/ /usr/lib64/cmf/
(2)特别目录
CMserver节点：rm -rf /var/cache/yum/x86_64/$releasever/cloudera-manager/
其他节点：rm -rf /var/cache/yum/x86_64/7Server/cloudera-manager/
11.移出Lock File
rm -rf /tmp/.scm_prepare_node.lock
12.移出用户数据
相应的目录位置
Cloudera Manager安装、配置、数据、日志等目录 /usr/share/cmf /usr/lib64/cmf /var/lib/cloudera* /var/cache/yum/x86_64/6/cloudera* /var/log/cloudera* /var/run/cloudera* /etc/cloudera* /tmp/.scm_prepare_node.lock
用户数据目录 /var/lib/flume-ng /var/lib/hadoop* /var/lib/hue /var/lib/navigator /var/lib/oozie /var/lib/solr /var/lib/sqoop* /var/lib/zookeeper /var/lib/alternatives/avro-tools /var/lib/alternatives/beeline /var/lib/alternatives/catalogd /var/lib/alternatives/cli_* /var/lib/alternatives/flume* /var/lib/alternatives/hadoop* /var/lib/alternatives/hbase* /var/lib/alternatives/hcat /var/lib/alternatives/hdfs /var/lib/alternatives/hive* /var/lib/alternatives/hue* /var/lib/alternatives/impala* /var/lib/alternatives/llama* /var/lib/alternatives/load_gen /var/lib/alternatives/mahout* /var/lib/alternatives/mapred /var/lib/alternatives/oozie* /var/lib/alternatives/pig* /var/lib/alternatives/pyspark /var/lib/alternatives/sentry* /var/lib/alternatives/solr* /var/lib/alternatives/spark* /var/lib/alternatives/sqoop* /var/lib/alternatives/statestored /var/lib/alternatives/whirr /var/lib/alternatives/yarn /var/lib/alternatives/zookeeper*
配置文件目录 /etc/flume-ng /etc/hadoop* /etc/hbase* /etc/hive* /etc/hue /etc/pig /etc/sentry /etc/solr /etc/spark /etc/sqoop* /etc/zookeeper* /etc/alternatives/avro-tools /etc/alternatives/beeline /etc/alternatives/catalogd /etc/alternatives/cli_* /etc/alternatives/flume* /etc/alternatives/hadoop* /etc/alternatives/hbase* /etc/alternatives/hcat /etc/alternatives/hdfs /etc/alternatives/hive* /etc/alternatives/hue* /etc/alternatives/impala* /etc/alternatives/llama* /etc/alternatives/load_gen /etc/alternatives/mahout* /etc/alternatives/mapred /etc/alternatives/oozie* /etc/alternatives/pig* /etc/alternatives/pyspark /etc/alternatives/sentry* /etc/alternatives/solr* /etc/alternatives/spark* /etc/alternatives/sqoop* /etc/alternatives/statestored /etc/alternatives/whirr /etc/alternatives/yarn /etc/alternatives/zookeeper*
Hadoop相关服务安装目录、服务软件包数据，数据格式为parcels、服务软件包缓存数据等 /opt/cloudera/
日志目录 /var/log/hive /var/log/hbase /var/log/hadoop* /var/log/zookeeper
mysql数据目录 /var/lib/mysql
调整每个主机上的数据驱动器的路径，如果主机包含多个驱动路径，则配置多个每个目录占用一行，例如: #/mnt/sdb1/dfs #/mnt/sdb2/dfs /dfs /mapred /yarn
使用下面命令进行一次清除：
rm -rf /usr/share/cmf /usr/lib64/cmf /var/lib/cloudera* /var/cache/yum/x86_64/6/cloudera* /var/log/cloudera* /var/run/cloudera* /etc/cloudera* /tmp/.scm_prepare_node.lock /var/lib/flume-ng /var/lib/hadoop* /var/lib/hue /var/lib/navigator /var/lib/oozie /var/lib/solr /var/lib/sqoop* /var/lib/zookeeper /var/lib/alternatives/avro-tools /var/lib/alternatives/beeline /var/lib/alternatives/catalogd /var/lib/alternatives/cli* /var/lib/alternatives/flume* /var/lib/alternatives/hadoop* /var/lib/alternatives/hbase* /var/lib/alternatives/hcat /var/lib/alternatives/hdfs /var/lib/alternatives/hive* /var/lib/alternatives/hue* /var/lib/alternatives/impala* /var/lib/alternatives/llama* /var/lib/alternatives/load_gen /var/lib/alternatives/mahout* /var/lib/alternatives/mapred /var/lib/alternatives/oozie* /var/lib/alternatives/pig* /var/lib/alternatives/pyspark /var/lib/alternatives/sentry* /var/lib/alternatives/solr* /var/lib/alternatives/spark* /var/lib/alternatives/sqoop* /var/lib/alternatives/statestored /var/lib/alternatives/whirr /var/lib/alternatives/yarn /var/lib/alternatives/zookeeper* /etc/flume-ng /etc/hadoop* /etc/hbase* /etc/hive* /etc/hue /etc/pig /etc/sentry /etc/solr /etc/spark /etc/sqoop* /etc/zookeeper* /etc/alternatives/avro-tools /etc/alternatives/beeline /etc/alternatives/catalogd /etc/alternatives/cli* /etc/alternatives/flume* /etc/alternatives/hadoop* /etc/alternatives/hbase* /etc/alternatives/hcat /etc/alternatives/hdfs /etc/alternatives/hive* /etc/alternatives/hue* /etc/alternatives/impala* /etc/alternatives/llama* /etc/alternatives/load_gen /etc/alternatives/mahout* /etc/alternatives/mapred /etc/alternatives/oozie* /etc/alternatives/pig* /etc/alternatives/pyspark /etc/alternatives/sentry* /etc/alternatives/solr* /etc/alternatives/spark* /etc/alternatives/sqoop* /etc/alternatives/statestored /etc/alternatives/whirr /etc/alternatives/yarn /etc/alternatives/zookeeper* /opt/cloudera/ /var/log/hive /var/log/hbase /var/log/hadoop* /var/log/zookeeper /dfs /mapred /yarn
13.停止数据库
在安装数据库的节点上停掉数据库服务:systemctl stop mariadb
(如果是mysql，则systemctl stop mysql)
14.卸载所有节点上数据库
yum remove -y mariadb mariadb-server
15.删除数据库目录
rm -rf /var/lib/mysql
完毕！可以重新安装了！
原文链接：CDH集群完全卸载过程