Ansible: Failed to reload sysctl: sysctl: cannot stat /proc/sys/net/bridge/bridge-nf-call-iptables: No such file or directory
In the playbook, add the following task to load the br_netfilter module:
- name: Ensure br_netfilter is enabled. modprobe: name: br_netfilter state: present
Loading br_netfilter kernel module fixed the problem. I simply appended it to the ip_modules list in playbook vars declaration. I'm using Centos 7.