clean.uninstall.cdh.on.centos7

clean.uninstall.cdh.on.centos7.bash

#!/bin/bash
# url: https://www.cloudera.com/documentation/enterprise/5-14-x/topics/cm_ig_uninstall_cm.html#concept_x4y_pgz_jm
# 

# 1. Record User Data Paths
# 2. Stop all Services
# 3. Deactivate and Remove Parcels
# 4. Delete the Cluster
# 5. Uninstall the Cloudera Manager Server
# 6. Uninstall Cloudera Manager Agent and Managed Software
# 7. Remove Cloudera Manager and User Data
#     a. Kill Cloudera Manager and Managed Processes
#     b. Remove Cloudera Manager Data
#     c. Remove the Cloudera Manager Lock File
#     d. Remove User Data
#     e. Stop and Remove External Databases

# do 1-4 on cm web 
# followings are 5~7

# on cloudera manager server host
service cloudera-scm-server stop
yum remove cloudera-manager-server -y

# on all cloudera manager agent hosts
service cloudera-scm-agent next_stop_hard 
service cloudera-scm-agent stop
yum remove 'cloudera-manager-*' -y
yum clean all 

# Kill Cloudera Manager and Managed Processes 
# On all Agent hosts, kill any running Cloudera Manager and managed processes:
for u in cloudera-scm flume hadoop hdfs hbase hive httpfs hue impala llama mapred oozie solr spark sqoop sqoop2 yarn zookeeper; do 
    kill $(ps -u $u -o pid=)
done

# Remove Cloudera Manager Data
umount cm_processes
rm -Rf /usr/share/cmf /var/lib/cloudera* /var/cache/yum/cloudera* /var/log/cloudera* /var/run/cloudera*

# Remove the Cloudera Manager Lock File
# On all Agent hosts, run this command to remove the Cloudera Manager lock file:
rm /tmp/.scm_prepare_node.lock

# Remove User Data
# This step permanently removes all user data. To preserve the data, copy it to another cluster using the distcp command before starting the uninstall process. On all Agent hosts, run the following commands:
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

# Run the following command on each data drive on all Agent hosts (adjust the paths for the data drives on each host):
rm -Rf data_drive_path/dfs data_drive_path/mapred data_drive_path/yarn