1 集群卸载前准备
1.1 停止集群服务
在cloudera manager主页上选择Cluster1菜单的停止选项

在弹出的对话框中选择停止

集群服务停止完成

1.2 停止Cloudera Management Service
选择Coudera Management Server菜单的停止选项

选择停止

Cloudera Management Server停止完成

1.3 解除并移除Parcels
进入Cloudera Manager主页，点击Parcel图标

在parcel页面，点击右方终止按钮

选择仅限停用状态，确定

此时右方按钮变为“激活”

点击“激活”下方菜单，选择“从主机中删除”

选择“OK“

正在取消分配…

完成后按钮变为“分配“，点击下方菜单选择”删除“

点击“OK“

删除成功后按钮变为“下载“

1.4 删除集群
进入Cloudera Manager主页，点击Cluster右方菜单，选择“删除“

确认删除

删除成功后主页显示如下

2 软件卸载与目录删除
2.1 卸载Cloudera Manager Server
在主节点使用如下命令停止cloudera-scm-server服务，然后使用yum移除该服务
systemctl stop cloudera-scm-server
yum -y remove cloudera-manager-server

2.2 卸载Cloudera Manager Agent
在主节点使用脚本批量停止所有节点的cloudera-scm-agent服务
vim batch_cmd.sh

#!/bin/sh
list_file=$1
cmd=$2
username=root
password=123456
cat $list_file | while read line
do
   host_ip=`echo $line | awk '{print $1}'`
   #username=`echo $line | awk '{print $2}'`
   #password=`echo $line | awk '{print $3}'`
   ./expect_cmd $host_ip $username $password "$cmd"
done 

vim nodelist

192.168.0.193
192.168.0.194
192.168.0.195

sh batch_cmd.sh node.list “service cloudera-scm-agent next_stop_hard”
sh batch_cmd.sh node.list “service cloudera-scm-agent stop”
注意：C6为batch_cmd.sh node.list “systemctl stop supervisord”

在所有节点执行如下命令，查看进程状态
ps -ef | grep cmf-agent
ps -ef | grep supervisord

2.3 卸载集群软件
使用脚本批量卸载所有节点上的软件
./batch_cmd.sh node.list “yum -y remove ‘cloudera-manager-*’ avro-tools crunch flume-ng hadoop-hdfs-fuse hadoop-hdfs-nfs3 hadoop-httpfs hadoop-kms hbase-solr hive-hbase hive-webhcat hue-beeswax hue-hbase hue-impala hue-pig hue-plugins hue-rdbms hue-search hue-spark hue-sqoop hue-zookeeper impala impala-shell kite llama mahout oozie pig pig-udf-datafu search sentry solr-mapreduce spark-core spark-master spark-worker spark-history-server spark-python sqoop sqoop2 whirr hue-common oozie-client solr solr-doc sqoop2-client zookeeper”

主节点移除状态

从节点移除状态

2.4 执行清除
使用脚本执行命令批量清除
./batch_cmd.sh node.list “yum clean all”

3 移除Cloudera Manager和用户数据
3.1 删除Cloudera Manager数据
使用脚本命令删除所有节点的Cloudera Manager数据
./batch_cmd.sh node.list “umount cm_processes”

./batch_cmd.sh node.list “rm -rf /usr/share/cmf /var/lib/cloudera* /var/cache/yum/x86_64/7Server/cloudera* /var/log/cloudera* /var/run/cloudera* /etc/cloudera* /usr/lib64/cmf”

3.2 移除Cloudera Manager Lock File
删除所有节点的.scm_prepare_node.lock文件
./batch_cmd.sh node.list “rm -rf /tmp/.scm_prepare_node.lock”

3.3 移除用户数据（所有节点）
删除用户数据目录
/var/lib/目录下相关组件数据目录
rm -rf /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/hbase /var/lib/impala /var/lib/hive /var/lib/kudu /var/lib/sentry /var/lib/spark /var/lib/spark2 /var/lib/kafka /var/lib/llama /var/lib/flink
/usr/lib/目录下的相关组件数据目录
rm -rf /usr/lib/hadoop /usr/lib/hadoop* /usr/lib/hive /usr/lib/hbase /usr/lib/hue /usr/lib/oozie /usr/lib/sqoop* /usr/lib/zookeeper /usr/lib/bigtop* /usr/lib/flume-ng /usr/lib/hcatalog
/var/run/目录下的相关组件数据目录
rm -rf /var/run/hadoop* /var/run/flume-ng /var/run/cloudera* /var/run/oozie /var/run/sqoop2 /var/run/zookeeper /var/run/hbase /var/run/hbase /var/run/impala /var/run/hive /var/run/hdfs-sockets /var/run/hue

删除各项服务的命令脚本文件
rm -rf /usr/bin/hadoop* /usr/bin/zookeeper* /usr/bin/hbase* /usr/bin/hive* /usr/bin/hdfs /usr/bin/mapred /usr/bin/yarn /usr/bin/sqoop* /usr/bin/oozie

删除集群配置
rm -rf /etc/cloudera* /etc/hadoop* /etc/zookeeper* /etc/hive* /etc/hue /etc/impala /etc/sqoop* /etc/oozie /etc/hbase* /etc/hcatalog /etc/kafka /etc/spark /etc/spark2 /etc/sentry

rm -rf /etc/alternatives/avro-tools /etc/alternatives/beeline /etc/alternatives/catalogd /etc/alternatives/cli_* /etc/alternatives/flume* /etc/alternatives/hadoop* /etc/alternatives/hbase* /etc/alternatives/impala* /etc/alternatives/llama* /etc/alternatives/hcat /etc/alternatives/hdfs /etc/alternatives/hive* /etc/alternatives/hue* /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

rm -rf /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/load_gen /var/lib/alternatives/hue* /var/lib/alternatives/impala* /var/lib/alternatives/llama* /var/lib/alternatives/mahout* /var/lib/alternatives/mapred /var/lib/alternatives/oozie* /var/lib/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/whirr /var/lib/alternatives/yarn /var/lib/alternatives/zookeeper

3.4 删除安装目录
删除/opt/cloudera/*
rm -rf /opt/cloudera/*
rm -rf /dfs/*
rm -rf /data0/yarn /data1/yarn
rm -rf /etc/yum.repos.d/cloudera*
删除nn，dn，jn，yarn，impala，kudu等安装目录
4 移除数据库
4.1 停止数据库服务
systemctl stop mariadb

4.2 删除数据库
yum -y remove mariadb*

4.3 删除数据库数据
rm -rf /var/lib/mysql/*