On 23. des. 2016 22:13, Spike wrote:
thanks for the explanation Kai, makes sense, it effectively does the same
thing I've done by setting a default value, but indeed I didn't understand
how when worked in conjunction with the with_items.
Here's however something else related that's happening and I'm not
understanding: why does this happens also if I move the task in a block and
apply the when to that?
You should really read the documentation, it's documented.
https://docs.ansible.com/ansible/playbooks_blocks.html
* - block:*
* - name: install sw requested for this box*
* apt:*
* name: "{{item}}"*
* state: present*
* install_recommends: yes*
* with_items: "{{additional_sw}}"*
* when: additional_sw is defined*
shouldn't the task only be considered if the block is executed? why in this
case i'm still getting the same error? and in fact, I also see the problem
elsewhere with an include, which is even stranger:
All the tasks in a block inherit the when, so it's the same as adding a
when on all the task.
*#tasks/main.yml*
* - include: interfaces.yml*
* when: server_interfaces is defined*
* tags:*
* - netwrk*
*#tasks/interfaces.yml*
* - name: generate new interfaces file*
* template:*
* src: interfaces.j2*
* dest: /etc/network/interfaces*
* owner: root*
* group: adm*
* mode: 0640*
* notify:*
* - restart network*
* - name: setup rt_tables*
* lineinfile:*
* dest: /etc/iproute2/rt_tables*
* regexp: "^{{item.id <http://item.id>}} "*
* line: "{{item.id <http://item.id>}} {{item.tname}}"*
* with_items: "{{server_rt_tables}}"*
* when: server_rt_tables is defined*
If I don't define server_interfaces I would expect the interfaces.yml to be
skipped. Is that not correct? Instead what I'm seeing is the "generate new
interfaces" task being skipped while the setup rt_tables throws the same
error. It seems like the tasks are "interpreted" even tho they are supposed
to be skipped, which doesn't make sense to me.
You should read the entire page that I linked to in my previous mail
https://docs.ansible.com/ansible/playbooks_conditionals.html
All the task in the include inherits the when.
So all task is executed with the when applied, it's same as manually
adding when to every single task.
any thoughts?
When alway get applied to the tasks, not the include or the block.
And the Ansible documentation is pretty good, I do recommend reading it,
you will pick up many useful things :-)
--
Kai Stian Olstad
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