Description of problem: I'm doing a deployment with 3 controllers and 40 compute nodes and the overcloud stack creation fails with: Resource CREATE failed: Collection length exceeds 200 elements Version-Release number of selected component (if applicable): instack-undercloud-5.0.0-4.el7ost.noarch It looks that we need to increase the [yaql] limit_iterators in /etc/heat/heat.conf as with the current version the default value gets set.
The problem is we're missing a fix that increases the yaql limit_iterators in the heat.conf on the undercloud (from the default of 200, which is too small for the large stacks we're creating with TripleO in this case). Upstream bug raised, and backport proposed: https://bugs.launchpad.net/tripleo/+bug/1642287 https://review.openstack.org/#/c/398396/
Workaround: 1. Create hieradata file: cat /home/stack/custom_hiera.yaml heat::yaql_limit_iterators: 1000 2. Edit undercloud.conf and point it to the hieradata file hieradata_override = /home/stack/custom_hiera.yaml 3. Rerun openstack undercloud install
https://review.openstack.org/#/c/398396/ landed, verfied by inspection it's included in instack-undercloud-5.1.0-3.el7ost.noarch.rpm
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHEA-2016-2948.html