for loops in Jinja2 can't be used (with any definition of sanity) in Ansible playbooks.
They can be used in templates used by the template module. Let's step back a moment... Can you remove the recursive reference and just call it "actual_free_mem" or something, and see where you are from there. On Mon, Jan 5, 2015 at 8:48 AM, Tom Bamford <[email protected]> wrote: > Hi Ulrich > > How about a ‘for’ loop (in Jinja2) contained as a parameter to the > set_fact module, iterating the facts you gathered as presented in the {{ > hostvars }} magic variable? > > Regards > Tom > > On 4 January 2015 at 03:02, Ulrich Hochholdinger < > [email protected]> wrote: > > Hi, >> I just started playing around with ansible and tried to achieve a simple >> operations task with it: >> >> Iterate over all nodes of my Xen-Cluster -- get free_memory of every node >> and sum up those values. >> next step would be making a decision e.g. spawning a new VM without >> overprovisioning the cluster. >> >> So I wrote a simple module which collects "xm info" values as >> ansible_facts. This was easy... >> >> Next step: write a playbook which sums up one of the collected fact >> (free_memory) -- here I got stuck and have no more ideas how to solve >> this... >> >> This is a not working idea: >> >> # vim:ft=ansible: >> --- >> - hosts: Cluster >> vars: >> # should be initially set to zero?? >> sum_free_memory: "{{ sum_free_memory|int + xm_infos.free_memory|int >> }}" >> tasks: >> - name: gather xen facts >> xm_info: >> >> - name: show free_memory on host >> debug: msg="{{ xm_infos.free_memory|int }}" >> >> - name: increment sum_free_memory >> debug: msg="{{ sum_free_memory|int }}" >> >> => which obviously doesn't work: >> ERROR: recursive loop detected in template string: {{ sum_free_memory|int >> + xm_infos.free_memory|int }} >> >> So how can I sum up collected facts from more than one host? >> >> Cheers >> Ulli >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Ansible Project" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/ansible-project/85495348-c277-40f4-ac7a-bade124f02c6%40googlegroups.com >> <https://groups.google.com/d/msgid/ansible-project/85495348-c277-40f4-ac7a-bade124f02c6%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > > > -- > You received this message because you are subscribed to the Google Groups > "Ansible Project" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/ansible-project/CAAnNz0PREA8CCG-n0cvb%3DQMmOfXoWWBvocG%3D0KURMPFf73JqeA%40mail.gmail.com > <https://groups.google.com/d/msgid/ansible-project/CAAnNz0PREA8CCG-n0cvb%3DQMmOfXoWWBvocG%3D0KURMPFf73JqeA%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Ansible Project" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/CA%2BnsWgz%3DtoZ%3D0zWtcgz49Mi86BKqUQ%3D9_eAX0vZQ-6izgKBMeA%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
