Ansible Different hosts, different action - variables

Question

with Ansible I need to copy a script in different clients/hosts, then I need to modify a line in the script. The line depends of the client and is not the same each times.
Each hosts have the same name. Each clients name is different.
Something like that:
lineinfile: >
state=present
dest=/path/to/myscript
line="/personal line
when: {{ clients/hosts }} is {{ client/host }}
As you can see, I have no idea about the way to proceed.

Answer 1

It sounds like there are some clients that have some specific hosts associated to them, and the line in this script will vary based on the client.
In that case, you should use group vars. I've included a simplified example below.
Set up your hosts file like this:
[client1]
host1
host2
[client2]
host3
host4
Use group variables like this:
File group_vars/client1:
variable_script_line: echo "this is client 1"
File group_vars/client2:
variable_script_line: echo "this is client 2"
Create a template file named yourscript.sh.j2:
#!/bin/bash
# {{ ansible_managed }}
script line 1
script line 2
# below is the line that should be dynamic
{{ variable_script_line }}
And then use the template module like this:
---
- hosts: all
tasks:
- name: Deploy script to remote hosts
template:
src: /path/to/yourscript.sh.j2
dest: /path/to/location/yourscript.sh
mode: 0755
Note that the path to your source template will be different if you're using a [role][1].
Ultimately, when the play is run on client1 vs client2, the content of the template will be written differently based on the variable (see more about variable scopes).