Bootstrapping manual controller on arm64 fails

[Liam Young]

I have an arm64 machine (64bit Ubuntu on Raspberry pi 4). I think I should be able to use it as a juju controller if I add it using the manual provider. But when I try:

juju bootstrap --bootstrap-series=focal pi pi-controller

It seems to correctly detect it is an arm64 machine:
"series: focal, characteristics: arch=arm64 cores=4 mem=3793M"

But then seems to filter on amd64:
"
finding agent binaries in stream: "released"
reading agent binaries with major.minor version 2.7
filtering agent binaries by version: 2.7.6
filtering agent binaries by series: focal
filtering agent binaries by architecture: amd64"

And eventually:
18:05:52 ERROR juju.cmd.juju.commands bootstrap.go:776 failed to bootstrap model: expected tools for "focal": no matching agent binaries available

I am issuing the bootstrap from a bionic machine:

1 liam@fawkes:~$ which juju
/snap/bin/juju
liam@fawkes:~$ juju --version
2.7.6-bionic-amd64
liam@fawkes:~$

[Liam Young (gnuoy)]

Bootstrap log

[Achilleas Anagnostopoulos (achilleasa)]

PR https://github.com/juju/juju/pull/11801 includes a fix for 2.8.

Note that for older juju version you can specify bootstrap constraints for the series/arch as a workaround.