Customized service accounts with Ambari BluePrint

[#1]

How can I Provide customized service accounts in Ambari Blueprint.Any references can help us.

[#2]

here's blueprint reference api. @avoma

[#3]

Thanks All !!

Let me try...Appreciate your help.

[#4]

I set below properties in blueprint still its creating some groups and users

{
"kafka-env" : {
"properties_attributes" : { },
"properties" : {
"kafka_user" : "{{ ambari_user_prefix }}-kafka"
}}},
{
"ams-env" : {
"properties_attributes" : { },
"properties" : {
"ambari_metrics_user" : "{{ ambari_user_prefix }}-ams"
}}},
{
"zookeeper-env" : {
"properties_attributes" : { },
"properties" : {
"zk_user" : "{{ ambari_user_prefix }}-zookeeper"
}}},
{
"cluster-env" : {
"properties_attributes" : { },
"properties" : {
"user_group" : "{{ ambari_user_prefix }}-hadoop",
"smokeuser" : "{{ ambari_user_prefix }}-ambari-qa"
}},{
"hbase-env" : {
"properties_attributes" : { },
"properties" : {
"hbase_user" : "{{ ambari_user_prefix }}-hbase",
}}},
{
"hadoop-env" : {
"properties_attributes" : { },
"properties" : {
"hdfs_user" : "{{ ambari_user_prefix }}-hdfs",
}}},

{
"hdfs-site" : {
"properties" : {
"dfs.permissions.superusergroup" : "{{ ambari_user_prefix }}-hdfs",
"dfs.cluster.administrators" : " {{ ambari_user_prefix }}-hdfs",
"dfs.block.local-path-access.user" : "{{ ambari_user_prefix }}-hbase"

}}

{
"kafka-broker" : {
"properties" : {
"kafka.ganglia.metrics.group" : "{{ ambari_user_prefix }}-kafka"

}

{
"core-site" : {
"properties" : {
"hadoop.proxyuser.{{ ambari_user_prefix }}-hbase.hosts" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-hbase.groups" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-hdfs.groups" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-hdfs.hosts" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-kafka.groups" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-kafka.hosts" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-zookeeper.groups" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-zookeeper.hosts" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-mapred.groups" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-mapred.hosts" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-yarn.groups" : "*",
"hadoop.proxyuser.{{ ambari_user_prefix }}-yarn.hosts" : "*",
"fs.defaultFS" : "hdfs://{{ ambari_cluster_name }}",
"ha.zookeeper.quorum" : "%HOSTGROUP::master_0%:12181,%HOSTGROUP::master_1%:12181,%HOSTGROUP::master_2%:12181"
}

Groups created

vcp-9999-hdfs:x:16031:vcp-9999-hdfs
vcp-9999-hadoop:x:16032:vcp-9999-zookeeper,vcp-9999-hbase,vcp-9999-kafka,vcp-9999-ams,vcp-9999-hdfs
zookeeper:x:498:
hadoop:x:497:
yarn:x:496:
mapred:x:495:
hdfs:x:494:

Users created
vcp-9999-zookeeper:x:16028:16032::/home/vcp-9999-zookeeper:/bin/bash
vcp-9999-hbase:x:16031:16032::/home/vcp-9999-hbase:/bin/bash
vcp-9999-ambari-qa:x:16034:16032::/home/vcp-9999-ambari-qa:/bin/bash
vcp-9999-kafka:x:16035:16032::/home/vcp-9999-kafka:/bin/bash
vcp-9999-ams:x:16038:16032::/home/vcp-9999-ams:/bin/bash
vcp-9999-hdfs:x:16039:16032::/home/vcp-9999-hdfs:/bin/bash
kafka:x:995:492:KAFKA:/home/kafka:/bin/bash

Can any one help to explain that why groups and users created ( in bold text) even though I have added properties.

How can we remove these users at the time of creation.

Thanks!