In case there is a need to check haproxy logs for a loadbalancer and investigate requests, it can be done the following way:
Find the loadbalancer you need
# openstack loadbalancer list | grep <loadbalancer_uuid/name>
Find the amphora for the loadbalancer/s
# openstack loadbalancer amphora list --loadbalancer <loadbalancer_uuid> +--------------------------------------+--------------------------------------+-----------+------------+---------------+--------------+ | id | loadbalancer_id | status | role | lb_network_ip | ha_ip | +--------------------------------------+--------------------------------------+-----------+------------+---------------+--------------+ | 477b4499-f51d-465f-af53-4a2af8fbdbec | 9d6ee355-fe8d-4102-9eed-dfb28e73fbaa | ALLOCATED | STANDALONE | 10.197.115.49 | 10.30.10.144 | +--------------------------------------+--------------------------------------+-----------+------------+---------------+--------------+
Login to the amphora with ssh key (should be possible from any cluster node):
# ssh ubuntu@10.197.115.49 -i /etc/kolla/octavia/ssh/amphora_ssh_key
Check haproxy.log which contains log for the loadbalancer
root@amphora-477b4499-f51d-465f-af53-4a2af8fbdbec:~# less /var/log/haproxy.log