It's impossible to drop root for the HAProxy container.
But HAProxy provides a possibility to use a chroot jail.
When attaching to the HAProxy container, we see that
the root directory is changed:
$ sudo docker exec -ti haproxy bash
(haproxy)[root@operator /]# ls -di /
259 /
Co-Authored-By: Vikram Hosakote <vhosakot@cisco.com>
Closes-Bug: #1552289
Change-Id: I9d55e9b741b8560cac53dc8b837a24a3029a4dc0
a5c1aa0b81