I am preparing some Ansible scripts for a service that works in a
master/slave setup. There is a single docker image for both but the
master/slave behavior will be acquired after configuring some environment
variables.
When i explicitly setup each container, this is roughly how my playbook
would look:
---
- hosts: host1,host2
gather_facts: yes
tasks:
docker_container:
name: "{{prefix}}_container"
image: "{{image_name}}"
state: started
env:
M1: V1
M2: {{IP_address_of_the_other_one}}
when: master
docker_container:
name: "{{prefix}}_container"
image: "{{image_name}}"
state: started
env:
S1: SV1
S2: {{IP_address_of_the_other_one}}
when: slave
What i want to do is to automate this in my playbook where Ansible would
automatically assign one value set to one host and second value set to the
other one. This will help me reduce the number of variables a person has to
configure. So how can i formulate a condition where i would apply M1 and M2
for one host and S1 and S2 for the other one ?
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