Ansible does not give the output as same as the script itself - ansible

Question

There is a script that I need to run on a specified server. To do that I use ansible playbooks. Only purpose of the playbook is running the script and getting the output but it is not same when I run the script on its own server.
This is the script I run:
echo ""
cd /kafka/confluent-7.0.1/bin
connectors=$(curl --silent -X GET http://connector-server:8083/connectors)
total=$(echo $connectors|jq '. | length')
counter=0
while [[ $counter < $total ]]
do
single=$(echo $connectors|jq .[$counter] -r)
if [[ $single = sink* ]] ;
then
silent=$(source kafka-consumer-groups --describe --group connect-$single --bootstrap-server kafka-server:9072 --command-config /kafka/vty/cli_sasl.properties)
partitions=$(echo -n "$silent" | grep -c '^')
partitions=$(( partitions - 2 ))
part_counter=0
echo "${single}"
while [[ $part_counter < $partitions ]]
do
lagpos=$(( 15 + $part_counter * 9 ))
lag=$(echo $silent | cut -d " " -f $lagpos)
echo "partition${part_counter}: ${lag} "
((part_counter++))
done
echo ""
fi
((counter++))
done
It gives an simple output like:
sink_connector1
partition0: 0
sink_connector2
partition0: 2
partition1: 3
partition2: 3
sink_connector3
partition0: 0
And here is the playbook I run on ansible server:
- hosts: all
gather_facts: no
connection: ssh
become: yes
become_user: kafka
tasks:
- name: Run Command
shell: cd /kafka/vty && ./lagcheck.sh
register: out
- debug: var=out.stdout_lines
But in the output lag values are empty:
TASK [Run Command] ************************************************************************************************************************************************************
changed: [connector-server]
TASK [debug] ******************************************************************************************************************************************************************
ok: [connector-server] => {
"out.stdout_lines": [
"",
"sink_connector1",
"partition0: ",
"partition1: ",
"partition2: ",
"",
"sink_connector2",
"partition0: ",
"partition1: ",
"partition2: ",
"",
"sink_connector3",
"partition0: ",
"partition1: ",
"partition2: "
]
}
What could be the reason? I was suspicious about no-new-line echos but it does not matter.

Answer 1

Due to all the "bash-isms" in the script, it is likely there is a difference between your interactive user's shell configuration and the non-interactive user that ansible uses. Explicitly using bash to run the script can tell ansible about your preference:
- hosts: all
gather_facts: no
connection: ssh
become: yes
become_user: kafka
tasks:
- name: Run Command
shell: cd /kafka/vty && bash ./lagcheck.sh
register: out