The password of USER haproxy by default？

[xxflwjq]

Need password of root and haproxy for command apt

Note: the 2.4+ versions of the container will run as USER haproxy by default

haproxy@xxxxxxx:/$ su root
Password:
su: Authentication failure

haproxy@xxxxxxx:/$ passwd haproxy
Changing password for haproxy.
Current password:
passwd: Authentication token manipulation error
passwd: password unchanged

[xxflwjq]

Add "user: root" in docker-compose.yml instead of change password, then "apt-get update" availabled.

version: '3.5'
services:
haproxy:
image: haproxy
user: root
... ...