Ansible: How to read file and push results to templates - postgresql

Question

I have task to read data from csv file and push result to templates and copy those templates to different servers. however, i am getting error while writing to template. below are details -
main.yml
- name: Print return information from the previous task
vars:
test_csv: "{{ lookup('file', '/u00/ansible/Playbooks/files/newrelic_test.csv', wantlist=True) }}"
ansible.builtin.debug:
var: test_csv
- name: copy template
template:
src: /u00/ansible/Playbooks/files/infra-config.yml_template
dest: /u00/app/monitor/infra-config.yml
with_items: test_csv
notify: confirm copy done
- name: Start the New Relic Service
ansible.builtin.systemd:
name: infra.service
state: started
become: yes
become_user: root
infra-config.yml_template -
custom_attributes:
application : {{ item.Application }}
env : {{ item.env }}
datacenter : {{ item.Datacenter }}
log:
file: /u00/app/monitor/infra.log
csv file content
Application,Host,env,Datacenter
Microsoft,testserver1,TEST,DC1
Apple,testserver2,TEST,DC2
error -
> TASK [config-update : copy template]
> ******************************************* [0;31mAn exception occurred during task execution. To see the full traceback, use -vvv.
> The error was: ansible.errors.AnsibleUndefinedVariable:
> 'ansible.utils.unsafe_proxy.AnsibleUnsafeText object' has no attribute
> 'db_name'[0m [0;31mfailed: [testserver1]
> (item=test_csv) => {"ansible_loop_var": "item", "changed": false,
> "item": "test_csv", "msg": "AnsibleUndefinedVariable:
> 'ansible.utils.unsafe_proxy.AnsibleUnsafeText object' has no attribute
> 'db_name'"}
Expectation is to read csv file and use variables in template in different servers.
testserver1 -
> custom_attributes: application : Microsoft env : Test datacenter : DC1
> log: file: /u00/app/monitor/infra.log
testserver2 -
> custom_attributes: application : Apple env : Test datacenter : DC1
> log: file: /u00/app/monitor/infra.log

Answer 1

There are few things to fix in your playbook. First, you are defining your test_csv variable inside a task and it cannot be accessible by other tasks. You can use register instead. However, the first task returns a list but with one string like this "test_csv": ["Application,Host,env,Datacenter\nMicrosoft,testserver1,TEST,DC1 \nApple,testserver2,TEST,DC2"] which only results one item in the test_csv list.
You can achieve this by using read_csv module as well. Below I demonstrate how:
Note that I have added a condition using inventory_hostname on the copy template task since you might want to target each csv line according to its hostname. You can modify this according to your needs.
Csv file content:
Application,Host,env,Datacenter
Microsoft,localhost,TEST,DC1
Apple,testserver2,TEST,DC2
Example of playbook for testing:
- name: Check status
hosts: localhost
gather_facts: no
tasks:
- name: read csv file and return a list
read_csv:
path: test.csv
register: applications
- name: Ouput applications from previous task
debug:
msg: "{{ item.Application }}"
loop: "{{ applications.list }}"
- name: copy template
template:
src: src.yml_template ##I would recommendr to use .j2 jinja template instead.
dest: dest.yml
loop: "{{ applications.list }}"
when: inventory_hostname == item.Host
src.yml_template content:
custom_attributes:
application : {{ item.Application }}
env : {{ item.env }}
datacenter : {{ item.Datacenter }}
log:
file: /u00/app/monitor/infra.log
Gives in dest.yml:
custom_attributes:
application : Microsoft
env : TEST
datacenter : DC1
log:
file: /u00/app/monitor/infra.log
Cli output:
PLAY [Check status] **********************************************************************************************************************************************************
TASK [read csv file and return a list] ***************************************************************************************************************************************
ok: [localhost]
TASK [Ouput applications from previous task] *********************************************************************************************************************************
ok: [localhost] => (item={'Application': 'Microsoft', 'Host': 'localhost', 'env': 'TEST', 'Datacenter': 'DC1 '}) => {
"msg": "Microsoft"
}
ok: [localhost] => (item={'Application': 'Apple', 'Host': 'testserver2', 'env': 'TEST', 'Datacenter': 'DC2'}) => {
"msg": "Apple"
}
TASK [copy template] *********************************************************************************************************************************************************
changed: [localhost] => (item={'Application': 'Microsoft', 'Host': 'localhost', 'env': 'TEST', 'Datacenter': 'DC1 '})
skipping: [localhost] => (item={'Application': 'Apple', 'Host': 'testserver2', 'env': 'TEST', 'Datacenter': 'DC2'})