move-journal-node.sh

#!/bin/bash

AMBARI_USER='admin'
 AMBARI_PASSWORD='PWPWPW'
AMBARI_HOST='localhost'
CLUSTER_NAME='mitate'
MOVE_FROM='old-host.mitate.com'
MOVE_TO='new-host.mitate.com'
SSH_USER=john.doe

# Tell to ambari we want to install this component on new_host
curl -u $AMBARI_USER:$AMBARI_PASSWORD -H "X-Requested-By:ambari" -i -X POST http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER_NAME/hosts/$MOVE_TO/host_components/JOURNALNODE

# Trigger installation
curl -u $AMBARI_USER:$AMBARI_PASSWORD -H "X-Requested-By:ambari" -i -X PUT -d '{"RequestInfo": {"context": "Install JournalNode","query":"HostRoles/component_name.in('JOURNALNODE')"}, "Body":{"HostRoles": {"state": "INSTALLED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER_NAME/hosts/$MOVE_TO/host_components

# Stop JournalNode on old host 
curl -u $AMBARI_USER:$AMBARI_PASSWORD -H "X-Requested-By:ambari" -i -X PUT -d '{"RequestInfo": {"context": "Stop JournalNode","query":"HostRoles/component_name.in('JOURNALNODE')"}, "Body":{"HostRoles": {"state": "INSTALLED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER_NAME/hosts/$MOVE_FROM/host_components/JOURNALNODE

# copy journal from old node to new node.
mkdir /hadoop/hdfs
rsync -av -e "ssh" --rsync-path="sudo rsync" $SSH_USER@$MOVE_FROM:/hadoop/hdfs/journal/ $SSH_USER@$MOVE_TO:/hadoop/hdfs/journal

# update the configuration property below within in the Ambari UI within the HDFS section.
#  <dfs.namenode.shared.edits.dir> 

# Start JournalNode on new host 
curl -u $AMBARI_USER:$AMBARI_PASSWORD -H "X-Requested-By:ambari" -i -X PUT -d '{"RequestInfo": {"context": "Start JournalNode","query":"HostRoles/component_name.in('JOURNALNODE')"}, "Body":{"HostRoles": {"state": "STARTED"}}}' http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER_NAME/hosts/$MOVE_TO/host_components/JOURNALNODE

# Remove the old component
curl -u $AMBARI_USER:$AMBARI_PASSWORD -H "X-Requested-By:ambari" -i -X DELETE http://$AMBARI_HOST:8080/api/v1/clusters/$CLUSTER_NAME/hosts/$MOVE_FROM/host_components/JOURNALNODE

Hello Did you make anything to reconstruct the dfs.journalnode.edits.dir.
my directory dfs.journalnode.edits.dir seems to stay empty now.
Even the other nodes I did not move ...

Best Regards.