Relay errors in fresh new on premise install

On-Premise
11

For any reason this is not taking effect for me. I’ve added the lines to my docker-compose file but relay is still trying to resolve the IPv6 for the service name.

root@basecamp /srv/sentry # docker-compose config
networks:
  default: {}
  sentry-proxy:
    external: true
    name: nginx-proxy_sentry
services:
  relay:
    depends_on:
      kafka:
        condition: service_started
      redis:
        condition: service_started
    image: getsentry/relay:20.12.1
    restart: unless-stopped
    sysctls:
      net.ipv6.conf.all.disable_ipv6: '1'
    volumes:
    - read_only: true
      source: /srv/sentry/geoip
      target: /geoip
      type: bind
    - read_only: true
      source: /srv/sentry/relay
      target: /work/.relay
      type: bind

The error is still the same:

2020-12-29T23:17:54Z [relay_server::actors::upstream] ERROR: authentication encountered error: could not send request to upstream
  caused by: could not send request using actix-web client
  caused by: Failed to connect to host: Failed resolving hostname: no record found for name: web type: AAAA class: IN
  caused by: Failed resolving hostname: no record found for name: web type: AAAA class: IN
  caused by: Failed resolving hostname: no record found for name: web type: AAAA class: IN
2020-12-29T23:18:08Z [relay_server::actors::upstream] WARN: Network outage, scheduling another check in 60s

Looking up the DNS (IPv4) from the container itself using dig works:

root@07af2dcb0fac:/work# dig web
; <<>> DiG 9.11.5-P4-5.1+deb10u2-Debian <<>> web
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 19165
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;web.                           IN      A

;; ANSWER SECTION:
web.                    600     IN      A       172.27.0.21

;; Query time: 0 msec
;; SERVER: 127.0.0.11#53(127.0.0.11)
;; WHEN: Tue Dec 29 23:22:02 UTC 2020
;; MSG SIZE  rcvd: 40

Github Issue: https://github.com/getsentry/onpremise/issues/608
Same Topic here in the forum: How to troubleshoot: There is 1 issue with your system configuration