RancherOSがRaspberry pi 4で動かない

Raspberry pi 4で利用するOS選びの中での備忘
どうやら既知の問題のようです。
先日出たv1.5.5で動くかと思ったけど、ダメでした。
1.6.0か1.5.6で解消予定だとかなんとか…。

上記issue中で紹介されているイメージを使えば起動できるようになりますが、rancher serverは動作しないようです。

[rancher@rancher ~]$ sudo docker run -d --restart=unless-stopped -p 8080:8080 rancher/server
Unable to find image 'rancher/server:latest' locally
latest: Pulling from rancher/server
bae382666908: Pull complete
29ede3c02ff2: Pull complete
da4e69f33106: Pull complete
8d43e5f5d27f: Pull complete
b0de1abb17d6: Pull complete
422f47db4517: Pull complete
79d37de643ce: Pull complete
69d13e08a4fe: Pull complete
2ddfd3c6a2b7: Pull complete
bc433fed3823: Pull complete
b82e188df556: Pull complete
dae2802428a4: Pull complete
009c51753d61: Pull complete
8e8069ad8c92: Pull complete
3b80af338573: Pull complete
b8c0af5d007c: Pull complete
01628a7552b5: Pull complete
7b24807b33e3: Pull complete
4a90635eea48: Pull complete
59cbc39a6691: Pull complete
714b95237bb0: Pull complete
Digest: sha256:bceb994e83d86a8d2c0e199c36ce247b3d79c0b40f9e4dded2d2f5e834c35900
Status: Downloaded newer image for rancher/server:latest
14a3f3089bcfd5a971d77f3ebfa24ab1b685e21e82a0f866568d2e50c8593a83

[rancher@rancher ~]$ sudo docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS                              PORTS               NAMES
14a3f3089bcf        rancher/server      "/usr/bin/entry /usr…"   6 minutes ago       Restarting (1) About a minute ago                       agitated_mccarthy

[rancher@rancher ~]$ sudo docker logs 14a3f3089bcf
standard_init_linux.go:211: exec user process caused "exec format error"