issues with task not working

[Frank Dias]

why does this not work?

this is my play;

    - name: install PG HA

      hosts: dbs6

      gather_facts: True

      any_errors_fatal: True

      vars:

        postgres_ha_cluster_master_host: dbs03.prodea-int.net

        postgres_ha_cluster_vip: 172.24.2.241

        postgres_ha_pg_repl_pass: Pr0d3aDdbsRep

        postgres_ha_cluster_ha_password: Pr0d3aOps

        postgres_ha_cluster_ha_password_hash: '$6$random_salt$oOZNTHqP.FhvKCx80X61rfbB3evBPVlnGYxcjJi82gNSLbJY3hNaMipUpNdVBGnFz1uy1UuwWZ0Mcmq/j04c2.'

      pre_tasks:

        - name: disable firewall

          service: name=iptables state=stopped enabled=no

      roles:

         - postgres-ha6

in the role I have  several task that i want performed on specific host and that host is define as variable 

- name: init DB dir on master if necessary

  shell: '{{ postgres_ha_pg_bindir }}/pg_ctl initdb'

  become: yes

  become_user: postgres

  args:

    creates: "{{ postgres_ha_pg_data }}/PG_VERSION"

  when: inventory_hostname == postgres_ha_cluster_master_host

# run only on one node

[benno joy]

would be helpful if you could run the playbook in verbose "-vvv" and
paste an output so we know what is not working and why it is not
working.

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[Frank Dias]

I am work with 

https://github.com/YanChii/ansible-role-postgres-ha

if I use centos 7 minimal install, it works mostly a few bugs.

but if I try with centos6 minimal install , need to add libselinux-python to installation.

i am stuck with failures in the task postgresql_sync.yml , from what I am seeing it installs the pkgs but does not execute task on host declared in  postgres_ha_cluster_master_host variable.

I would not think that there would be this much behavioral change in the role between OS version.

currently our env is centos6 and plans are not set for when to go to centos7 as of yet