I can reproduce this bug on my Mac which should aid in confirmation for `armhf`.
``` Edwards-MacBook-Air:~ emv$ docker run --rm armhf/ubuntu:xenial apt-get update
Unable to find image 'armhf/ubuntu:xenial' locally xenial: Pulling from armhf/ubuntu 3ec2010dcf9a: Pull complete a9ce7d83bdeb: Pull complete a096d24b8544: Pull complete e1d64facf085: Pull complete 6300ac39294b: Pull complete Digest: sha256:ad289f5b5c2a0bd88f61333b0d6f0ea81051c6f315a8eb22de0907e1da960115 Status: Downloaded newer image for armhf/ubuntu:xenial Get:1 http://ports.ubuntu.com/ubuntu-ports xenial InRelease [247 kB] Get:2 http://security.ubuntu.com/ubuntu xenial-security InRelease [102 kB] Get:3 http://ports.ubuntu.com/ubuntu-ports xenial-updates InRelease [102 kB] Get:4 http://ports.ubuntu.com/ubuntu-ports xenial-backports InRelease [102 kB] Get:5 http://security.ubuntu.com/ubuntu xenial-security/universe Sources [30.0 kB] Ign:6 http://security.ubuntu.com/ubuntu xenial-security/main armhf Packages Ign:7 http://security.ubuntu.com/ubuntu xenial-security/restricted armhf Packages Ign:8 http://security.ubuntu.com/ubuntu xenial-security/universe armhf Packages Ign:9 http://security.ubuntu.com/ubuntu xenial-security/multiverse armhf Packages Ign:6 http://security.ubuntu.com/ubuntu xenial-security/main armhf Packages Ign:7 http://security.ubuntu.com/ubuntu xenial-security/restricted armhf Packages Ign:8 http://security.ubuntu.com/ubuntu xenial-security/universe armhf Packages Ign:9 http://security.ubuntu.com/ubuntu xenial-security/multiverse armhf Packages Ign:6 http://security.ubuntu.com/ubuntu xenial-security/main armhf Packages Ign:7 http://security.ubuntu.com/ubuntu xenial-security/restricted armhf Packages Ign:8 http://security.ubuntu.com/ubuntu xenial-security/universe armhf Packages Ign:9 http://security.ubuntu.com/ubuntu xenial-security/multiverse armhf Packages Err:6 http://security.ubuntu.com/ubuntu xenial-security/main armhf Packages 404 Not Found [IP: 91.189.88.161 80] Ign:7 http://security.ubuntu.com/ubuntu xenial-security/restricted armhf Packages Ign:8 http://security.ubuntu.com/ubuntu xenial-security/universe armhf Packages Ign:9 http://security.ubuntu.com/ubuntu xenial-security/multiverse armhf Packages Get:10 http://ports.ubuntu.com/ubuntu-ports xenial/universe Sources [9802 kB] Get:11 http://ports.ubuntu.com/ubuntu-ports xenial/main armhf Packages [1486 kB] Get:12 http://ports.ubuntu.com/ubuntu-ports xenial/restricted armhf Packages [8491 B] Get:13 http://ports.ubuntu.com/ubuntu-ports xenial/universe armhf Packages [9531 kB] Get:14 http://ports.ubuntu.com/ubuntu-ports xenial/multiverse armhf Packages [149 kB] Get:15 http://ports.ubuntu.com/ubuntu-ports xenial-updates/universe Sources [185 kB] Get:16 http://ports.ubuntu.com/ubuntu-ports xenial-updates/main armhf Packages [592 kB] Get:17 http://ports.ubuntu.com/ubuntu-ports xenial-updates/restricted armhf Packages [8116 B] Get:18 http://ports.ubuntu.com/ubuntu-ports xenial-updates/universe armhf Packages [517 kB] Get:19 http://ports.ubuntu.com/ubuntu-ports xenial-updates/multiverse armhf Packages [5194 B] Get:20 http://ports.ubuntu.com/ubuntu-ports xenial-backports/main armhf Packages [4914 B] Get:21 http://ports.ubuntu.com/ubuntu-ports xenial-backports/universe armhf Packages [2561 B] Fetched 22.9 MB in 5min 15s (72.5 kB/s) Reading package lists... E: Failed to fetch http://security.ubuntu.com/ubuntu/dists/xenial-security/main/binary-armhf/Packages 404 Not Found [IP: 91.189.88.161 80] E: Some index files failed to download. They have been ignored, or old ones used instead. ```
I can reproduce this bug on my Mac which should aid in confirmation for `armhf`.
``` MacBook- Air:~ emv$ docker run --rm armhf/ubuntu:xenial apt-get update
Edwards-
Unable to find image 'armhf/ ubuntu: xenial' locally ad289f5b5c2a0bd 88f61333b0d6f0e a81051c6f315a8e b22de0907e1da96 0115 ports.ubuntu. com/ubuntu- ports xenial InRelease [247 kB] security. ubuntu. com/ubuntu xenial-security InRelease [102 kB] ports.ubuntu. com/ubuntu- ports xenial-updates InRelease [102 kB] ports.ubuntu. com/ubuntu- ports xenial-backports InRelease [102 kB] security. ubuntu. com/ubuntu xenial- security/ universe Sources [30.0 kB] security. ubuntu. com/ubuntu xenial- security/ main armhf Packages security. ubuntu. com/ubuntu xenial- security/ restricted armhf Packages security. ubuntu. com/ubuntu xenial- security/ universe armhf Packages security. ubuntu. com/ubuntu xenial- security/ multiverse armhf Packages security. ubuntu. com/ubuntu xenial- security/ main armhf Packages security. ubuntu. com/ubuntu xenial- security/ restricted armhf Packages security. ubuntu. com/ubuntu xenial- security/ universe armhf Packages security. ubuntu. com/ubuntu xenial- security/ multiverse armhf Packages security. ubuntu. com/ubuntu xenial- security/ main armhf Packages security. ubuntu. com/ubuntu xenial- security/ restricted armhf Packages security. ubuntu. com/ubuntu xenial- security/ universe armhf Packages security. ubuntu. com/ubuntu xenial- security/ multiverse armhf Packages security. ubuntu. com/ubuntu xenial- security/ main armhf Packages security. ubuntu. com/ubuntu xenial- security/ restricted armhf Packages security. ubuntu. com/ubuntu xenial- security/ universe armhf Packages security. ubuntu. com/ubuntu xenial- security/ multiverse armhf Packages ports.ubuntu. com/ubuntu- ports xenial/universe Sources [9802 kB] ports.ubuntu. com/ubuntu- ports xenial/main armhf Packages [1486 kB] ports.ubuntu. com/ubuntu- ports xenial/restricted armhf Packages [8491 B] ports.ubuntu. com/ubuntu- ports xenial/universe armhf Packages [9531 kB] ports.ubuntu. com/ubuntu- ports xenial/multiverse armhf Packages [149 kB] ports.ubuntu. com/ubuntu- ports xenial- updates/ universe Sources [185 kB] ports.ubuntu. com/ubuntu- ports xenial-updates/main armhf Packages [592 kB] ports.ubuntu. com/ubuntu- ports xenial- updates/ restricted armhf Packages [8116 B] ports.ubuntu. com/ubuntu- ports xenial- updates/ universe armhf Packages [517 kB] ports.ubuntu. com/ubuntu- ports xenial- updates/ multiverse armhf Packages [5194 B] ports.ubuntu. com/ubuntu- ports xenial- backports/ main armhf Packages [4914 B] ports.ubuntu. com/ubuntu- ports xenial- backports/ universe armhf Packages [2561 B] security. ubuntu. com/ubuntu/ dists/xenial- security/ main/binary- armhf/Packages 404 Not Found [IP: 91.189.88.161 80]
xenial: Pulling from armhf/ubuntu
3ec2010dcf9a: Pull complete
a9ce7d83bdeb: Pull complete
a096d24b8544: Pull complete
e1d64facf085: Pull complete
6300ac39294b: Pull complete
Digest: sha256:
Status: Downloaded newer image for armhf/ubuntu:xenial
Get:1 http://
Get:2 http://
Get:3 http://
Get:4 http://
Get:5 http://
Ign:6 http://
Ign:7 http://
Ign:8 http://
Ign:9 http://
Ign:6 http://
Ign:7 http://
Ign:8 http://
Ign:9 http://
Ign:6 http://
Ign:7 http://
Ign:8 http://
Ign:9 http://
Err:6 http://
404 Not Found [IP: 91.189.88.161 80]
Ign:7 http://
Ign:8 http://
Ign:9 http://
Get:10 http://
Get:11 http://
Get:12 http://
Get:13 http://
Get:14 http://
Get:15 http://
Get:16 http://
Get:17 http://
Get:18 http://
Get:19 http://
Get:20 http://
Get:21 http://
Fetched 22.9 MB in 5min 15s (72.5 kB/s)
Reading package lists...
E: Failed to fetch http://
E: Some index files failed to download. They have been ignored, or old ones used instead.
```