machine: hetzner: Fix deployment on smaller instances.

* gnu/machine/hetzner.scm (hetzner-machine-rescue-install-os): Avoid out of
disk space error by bind mounting /mnt/tmp/gnu/store to /gnu/store.
* tests/machine/hetzner.scm: Test with smaller instances.
* doc/guix.texi (Invoking guix deploy): Mention unsupported instance.

Change-Id: If8bfb6733de493b51813b3e82e255849192f7cba
Signed-off-by: Ludovic Courtès <ludo@gnu.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/machine/hetzner.scm b/tests/machine/hetzner.scm
index 39eac4a4d5f..1552bcb9a08 100644
--- a/tests/machine/hetzner.scm
+++ b/tests/machine/hetzner.scm
@@ -64,7 +64,7 @@
    (environment hetzner-environment-type)
    (configuration (hetzner-configuration
                    (labels %labels)
-                   (server-type "cax41")
+                   (server-type "cax11")
                    (ssh-key %ssh-key-file)))))
 
 (define %x86-machine
@@ -76,7 +76,7 @@
    (environment hetzner-environment-type)
    (configuration (hetzner-configuration
                    (labels %labels)
-                   (server-type "cpx51")
+                   (server-type "cx22")
                    (ssh-key %ssh-key-file)))))
 
 (define (cleanup machine)