Migrating HDF to CFM on CDP Private Cloud Base

Cloudera provides an AM2CM tool to enable you to migrate HDF cluster to CFM cluster on CDP Private Cloud Base easily. You need to download the AM2CM tool, configure settings for the tool, and generate Cloudera Manager template. After you generate the Cloudera Manager template, you need to configure the parcel, deploy Cloudera Manager, add CFM parcel, and activate the parcel through the Cloudera Manager UI.

Ensure that you have the latest Ambari blueprint (JSON file).

Download the AM2CM tool:

wget https://archive.cloudera.com/am2cm/1.x/am2cm-1.2.1.0-1.tar.gz

Extract the TAR file:
```
tar -xvf am2cm-1.2.1.0-1.tar.gz
```

Check the project files:

# cd am2cm-1.2.1.0-1
# [root@ccycloud-1 am2cm-1.2.1.0-1]# ls
am2cm-1.0.0.1.2.1.0-1.jar  am2cm.sh  conf  lib  ranger_policy_migration.py
 
 
# [root@ccycloud-1 am2cm-1.2.1.0-1]# ls conf
ambari_blueprint_hostgroups.josn  blueprint.json  cm-config-mapping-custom.ini  cm-config-mapping.ini  log4j.properties  ranger_policy_migration.py  service-config.ini  service-default-config.ini  user-settings.ini
 
 
# mv conf/blueprint.json conf/blueprint_initial.json
# [root@ccycloud-1 am2cm-1.2.1.0-1]# ls conf
ambari_blueprint_hostgroups.josn  blueprint_initial.json  cm-config-mapping-custom.ini  cm-config-mapping.ini  log4j.properties  ranger_policy_migration.py  service-config.ini  service-default-config.ini  user-settings.ini

Set JAVA_HOME if not already done:

[root@ccycloud-1 am2cm-1.2.1.0-1]# echo $JAVA_HOME
/usr/lib/jvm/java-1.8.0-openjdk-1.8.0.262.b10-0.el7_8.x86_64

Copy your Ambari blueprint to the right path, that is the conf directory of the AM2CM tool, from the Home directory:
```
cp /data/backups/HDFTOCDF_blueprint_with_hosts_20201103144235.json /root/am2cm-1.2.1.0-1/conf
```

Configure the user-settings.ini file:

It is really important to specify the cluster.name and cluster.displayname to the same original Ambari cluster name. Also, it is worth to fill all password field.

# Cluster details
cluster.name=zt-HDFTOCDF
cluster.displayname=HDFTOCDF

# Update this with correct CM/CDP version before running the tool
cluster.fullversion=7.1.6

cluster.originating_source=AM2CM version 2.0

# This is needed to update Ranger/Atlas policy service names.
ambari.cluster.name=HDFTOCDF

#This flag enables to translate Config Groups to Role config groups.
cm.rolegroups.enable = false

# FROM JDBC URL - tool reads only Hostname and port number - rest of the details like Database type, Database name, database user reads from from Blueprint.

# Do not enclose double quotes for passwords, provide exact password.

# Hive JDBC settings
SERVICE_HIVE_hive_metastore_database_password=password
SERVICE_HIVE_hive_jdbc_url_override=JDBC_URL

# Oozie JDBC settings
SERVICE_OOZIE_oozie_database_password=password
SERVICE_OOZIE_oozie_service_JPAService_jdbc_url=JDBC_URL

# Ranger JDBC settings
SERVICE_RANGER_ranger_database_password=password
SERVICE_RANGER_rangeradmin_user_password=password
SERVICE_RANGER_rangerusersync_user_password=password
SERVICE_RANGER_rangertagsync_user_password=password
SERVICE_RANGER_rangerkeyadmin_user_password=password
SERVICE_RANGER_ranger_usersync_ldap_ldapbindpassword=password

SERVICE_RANGER_KMS_ranger_kms_master_key_password=password
SERVICE_RANGER_KMS_ranger_kms_database_password=password

#Knox Settings
SERVICE_KNOX_gateway_master_secret=admin

If your cluster contains Kafka service, please override the kafka-broker-ids.ini files with the one you created.
For more details, see Extracting Kafka broker IDs.

Run the command to generate the Cloudera Manager template:

# cd am2cm-1.2.1.0-1
# chmod +x ./am2cm.sh
[root@ccycloud-1 am2cm-1.2.1.0-1]# ./am2cm.sh -bp conf/HDFTOCDF_blueprint_with_hosts_20201103144235.json -dt conf/cm_deployment_template.json
 
INPUT Ambari Blueprint : conf/HDFTOCDF_blueprint_with_hosts_20201103144235.json
OUTPUT CM Template     : conf/cm_deployment_template.json
 
Starting blueprint to CM Template migration
Total number of hosts in blueprint: 4
 
Your cluster has services (listed below) that are not handled by this migration tool.
AMBARI_METRICS
The tool will skip the above identified service related configs.
 
** This migration tool is a technical preview only **
 
Do you want to proceed with migration (Y OR N)? (N):
Y
Processing: LIVY
Processing: SOLR
Processing: TEZ
Processing: HDFS
Processing: OOZIE
Processing: SQOOP_CLIENT
Processing: NIFIREGISTRY
Processing: ZOOKEEPER
Processing: HBASE
Processing: YARN
Processing: RANGER_KMS
Processing: KNOX
Processing: ATLAS
Processing: HIVE_ON_TEZ
Processing: RANGER
Processing: HIVE
Processing: KAFKA
Processing: NIFI
Processing: SPARK_ON_YARN
Adding: QUEUEMANAGER
CM Template is generated at : /root/am2cm-1.2.1.0-1/conf/cm_deployment_template.json
Successfully completed

Check for errors in the tool log for Cloudera Manager migration:
```
less am2cm-1.2.1.0-1/cm_migration.log
```