Running the openshift-logging.yml playbook throws an OOM in the controller node.

Solution Verified - Updated -

Issue

With a controller node with 2G of mem, 30 managed host, the openshift-logging.yml playbook randomly fails (always during the fact gathering) without clear message. Instead, The controller node shows the following messages:

kernel: ansible-playboo invoked oom-killer: gfp_mask=0x280da, order=0, oom_score_adj=0
kernel:  [<ffffffff811863a4>] oom_kill_process+0x254/0x3d0

Environment

OCP 3.7
ansible.noarch 2.4.1.0-1.el7
Controller node with 2G of RAM
Inventory with 30 managed nodes

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