HI there.
I've been playing around with ansible for the past few days and I have run
across a question.
I need a way to set a value on host x ... and then have that information
available to host y.
Notice the playbook below:
- hosts: group1
tasks:
- name: count reg on primary
shell: psql -U widgets widgets -c 'SELECT COUNT(*) FROM location' -t
register: result
- debug: var=result.stdout
- set_fact: the_count={{result.stdout}}
- debug: var={{the_count}}
- hosts: group2
tasks:
- name: retrieve variable from previous play
shell: echo hello
- debug: var={{hostvars}}
When I run this, this is the output i get ... in part:
TASK [set_fact]
****************************************************************
ok: [myserver1.mydomain.com]
TASK [debug]
*******************************************************************
ok: [myserver1.mydomain.com] => {
"the_count": " 2"
}
PLAY
***************************************************************************
TASK [retrieve variable from previous play]
************************************
changed: [myserver1.mydomain.com]
changed: [myserver2.mydomain.com]
TASK [debug]
*******************************************************************
ok: [myserver1.mydomain.com] => {
"<ansible.vars.hostvars.HostVars object at 0x7fa8cff5c1d0>": "VARIABLE
IS NOT DEFINED!"
}
ok: [myserver2.mydomain.com] => {
"<ansible.vars.hostvars.HostVars object at 0x7fa8cff5c1d0>": "VARIABLE
IS NOT DEFINED!"
}
As you can see, in the first play, the variable seems to be set correctly
in the sense that I can query "the_count" and see that the value is 2.
However, once I hit the second play, I am unable to retrieve the value.
"group1" only contains myserver1. Group2 includes myserver1 and myserver2
as you can see from the output.
Myserver2 will not have "the_count" set, so I understand why I'm getting
the error message about the variable not being defined.
But why is this the case for server1?
Ultimately, i need to be able to change my hosts file so that "group2" only
includes myserver2. Should this code still work in that scenario?
I've been reading http://docs.ansible.com/ansible/set_fact_module.html but
I wasn't able to find any examples similar to what I'm trying to accomplish.
Perhaps I'm using the wrong function.
Any help would be appreciated.
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