I'm using variables within the inventory host name to provision
environments dynamically using the ansible openstack modules and this is
working well
[openstack]
myserver-{{env}}.subdomain.mycompany.com
but, when I try to use these hostnames in a jinja2 template snippet, it's
giving me errors
- name: find list of openstack servers which
set_fact:
openstack_servers: "{% for host in groups['openstack'] %}{{
hostvars[host]['inventory_hostname']{% if not loop.last %},{% endif %}{%
endfor %}"
Is there a way to make it working? Any help or references in this regard
will be appreciated :-)
To replicate this kind of error, run the below play (test.yml) with the
below inventory file(inventory.txt)
test.yml
---
- hosts: openstack
connection: local
tasks:
- debug: msg="inventory_hostname={{inventory_hostname}}"
- debug: msg="openstack_hosts={% for host in groups['openstack'] %}{{
hostvars[host]['inventory_hostname']}}{% if not loop.last %},{% endif %}{%
endfor %}"
inventory.txt
[openstack]
myserver-{{env}}.subdomain.mycompany.com
and run the play using
ansible-playbook test.yml -i inventory.txt --extra-vars="env=dev1"
The play fails with the below error :(
PLAY [openstack]
***************************************************************
TASK [setup]
*******************************************************************
ok: [myserver-{{env}}.subdomain.mycompany.com]
TASK [debug]
*******************************************************************
ok: [myserver-{{env}}.subdomain.mycompany.com] => {
"msg": "inventory_hostname=myserver-dev1.subdomain.mycompany.com"
}
TASK [debug]
*******************************************************************
fatal: [myserver-{{env}}.subdomain.mycompany.com]: FAILED! => {"failed":
true, "msg": "the field 'args' has an invalid value, which appears to
include a variable that is undefined. The error was:
'ansible.vars.hostvars.HostVars object' has no attribute
u'myserver-dev1.subdomain.mycompany.com'\n\nThe error appears to have been
in '/home/hos/test.yml': line 6, column 5, but may\nbe elsewhere in the
file depending on the exact syntax problem.\n\nThe offending line appears
to be:\n\n - debug: msg=\"inventory_hostname={{inventory_hostname}}\"\n -
debug: msg=\"openstack_hosts={% for host in groups['openstack'] %}{{
hostvars[host]['inventory_hostname']}}{% if not loop.last %},{% endif %}{%
endfor %}\"\n ^ here\nWe could be wrong, but this one looks like it
might be an issue with\nmissing quotes. Always quote template expression
brackets when they\nstart a value. For instance:\n\n with_items:\n
- {{ foo }}\n\nShould be written as:\n\n with_items:\n - \"{{ foo
}}\"\n"}
NO MORE HOSTS LEFT
*************************************************************
to retry, use: --limit @test.retry
PLAY RECAP
*********************************************************************
myserver-{{env}}.subdomain.mycompany.com : ok=2 changed=0
unreachable=0 failed=1
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