Connection timout après tentative d'installation via ynh-dev

Bonjour,

Dans le cadre du projet Duniter, je tente de déboguer l’installation sur YunoHost avec les outils de dev YunoHost.

Je suis l’installation proposée ici : https://github.com/YunoHost/ynh-dev

Arrivé à l’étape ./ynh-dev run ynh.local testing, ma VM paraît inaccessible :

cgeek@debian:~/ynhenv$ ./ynh-dev run ynh.local testing
Creating ynh.local virtual machine with YunoHost testing version

Bringing machine 'testing' up with 'virtualbox' provider...
==> testing: Importing base box 'yunohost/jessie-testing'...
==> testing: Matching MAC address for NAT networking...
==> testing: Setting the name of the VM: ynhenv_testing_1468413792562_51516
==> testing: Fixed port collision for 22 => 2222. Now on port 2200.
==> testing: Clearing any previously set network interfaces...
==> testing: Preparing network interfaces based on configuration...
    testing: Adapter 1: nat
    testing: Adapter 2: hostonly
==> testing: Forwarding ports...
    testing: 22 => 2200 (adapter 1)
==> testing: Booting VM...
==> testing: Waiting for machine to boot. This may take a few minutes...
    testing: SSH address: 127.0.0.1:2200
    testing: SSH username: vagrant
    testing: SSH auth method: private key
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
    testing: Warning: Connection timeout. Retrying...
Timed out while waiting for the machine to boot. This means that
Vagrant was unable to communicate with the guest machine within
the configured ("config.vm.boot_timeout" value) time period.

If you look above, you should be able to see the error(s) that
Vagrant had when attempting to connect to the machine. These errors
are usually good hints as to what may be wrong.

If you're using a custom box, make sure that networking is properly
working and you're able to connect to the machine. It is a common
problem that networking isn't setup properly in these boxes.
Verify that authentication configurations are also setup properly,
as well.

If the box appears to be booting properly, you may want to increase
the timeout ("config.vm.boot_timeout") value.
/!\ Please add '192.168.33.81 ynh.local' to your /etc/hosts file /!\
sudo su -c "echo  '192.168.33.81 ynh.local' >> /etc/hosts" root

ssh_exchange_identification: read: Connection reset by peer

A noter que je fais tout cela à l’intérieur même d’une VM VirtualBox … ce qui est peut-être l’origine du problème réseau (je suis en connexion par pont, mais au début de ma procédure j’étais en mode NAT).

A moins que le problème ne soit encore plus simple ?

Merci d’avance pour votre aide !

edit : et voici le contenu de mon fichier /etc/hosts :

127.0.0.1	localhost
127.0.1.1	debian

# The following lines are desirable for IPv6 capable hosts
::1     localhost ip6-localhost ip6-loopback
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
192.168.33.81 ynh.local

Tu peux peut essayer directement sur la machine hôte.
Si ça ne résoud pas le problème, il est possible qu’il faille activer qqch à propos de la virtualisation dans le BIOS.
Personnelement, j’ai eu ce problème sur un précédent ordinateur sans avoir réussi à résoudre ce problème.