looks like ansible lazily loads the *hostvars *dict with the raw hostname
and doesn't apply variable substitution, but the for other dicts like *groups
*variable substitutions are applied. Is this a bug?
The hostvars dict has *myserver-{{env}}.subdomain.mycompany.**com* as the
key instead of myserver-dev1.subdomain.mycompany.*com *and ansible fails
with the error The error was: 'ansible.vars.hostvars.HostVars object' has
no attribute u'myserver-dev1.subdomain.mycompany.com
On Saturday, July 2, 2016 at 9:47:23 PM UTC+5:30, Aneesh Joseph wrote:
>
> 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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