Disregard this email. Wrong assumption about "group_names". Sorry for the noise.
-vlado
On Wed, 4 Mar 2020 05:27:57 +0100
Vladimir Botka <vbo...@gmail.com> wrote:
> On Tue, 3 Mar 2020 19:36:11 -0800 (PST)
> Stephen Gevers <actionphot...@gmail.com> wrote:
>
> > solr is not a host, it is a group. It just happens to be a group of one
> > host. Likewise, dmgr is a group of one host. Consider the following
> > inventory:
> >
> > [dmgr]
> > host1.example.com
> >
> > [solr]
> > host2.example.com
>
> This justifies the developer's conclusion:
> https://github.com/ansible/ansible/issues/67410#issuecomment-590919487
>
> "This is a race condition between two different hosts modifying the same
> shared file, which is asking for trouble. There isn't much we can do in
> code to fix this."
>
> And in the same time, this reveals the problem in the code. The condition is
> true for both hosts. (I have no idea why "solr" reports "skipping")
>
> - hosts: dmgr:solr
>
> ...
>
> - name: create the file on dmgr
> shell: 'echo "Hello World" > {{ shared_dir }}/testfile'
> when: "'dmgr' in group_names"
>
> TASK [create the file on dmgr]
> *************************************************
> skipping: [SOLR REDACTED]
> changed: [DMGR REDACTED]
>
> Anyway, the solution is to fix the conditions and limit the deletion and
> creation of the file to the host from one group only. For example
>
> - name: Remove the file from solr
> file:
> path: "{{ shared_dir }}/testfile"
> state: absent
> when: inventory_hostname in groups.solr
>
> ...
>
> - name: create the file on dmgr
> shell: 'echo "Hello World" > {{ shared_dir }}/testfile'
> when: inventory_hostname in groups.dmgr
>
> As a side-note, it's possible to use "copy" instead of "shell"
>
> - name: create the file on dmgr
> copy:
> content: 'echo "Hello World"'
> dest: "{{ shared_dir }}/testfile"
> when: inventory_hostname in groups.dmgr
>
> HTH,
>
> -vlado
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