I tried devmode this afternoon and it worked very well. I discussed a few nits with
jlebon on #atomic, but thought I would mention them here.
- The generated root password can include similar characters l (letter L), 1 (number 1), O
(upper-case letter O), 0 (number zero), etc. I got bit by this when I tried to login to
the cockpit interface. Perhaps we could eventually use something like a series of
dictionary words separated by a certain character? (I found a discussion on StackOverflow
 about this potential problem.)
- I think we should include a string under the cockpit URL that says something like
"Login to the cockpit console with the username "root" and the generated
password above". If an intended audience is people who have never used Linux, we
should be fairly explicit with instructions right out of the box.
----- Original Message -----
> From: "Jonathan Lebon" <jlebon(a)redhat.com>
> To: cloud(a)lists.fedoraproject.org, atomic-devel(a)projectatomic.io
> Sent: Wednesday, December 23, 2015 11:50:14 AM
> Subject: Fedora 23 Cloud Atomic Developer Mode Preview
> Hi all,
> As some of you may already know, I've been working on adding
> a new feature to the Fedora 23 Cloud Atomic image called
> "Developer Mode" (I'm not sure yet if this is the correct
> name for it). The Trello card is available at .
> The high-level goal is to make Atomic more accessible by
> providing a new GRUB 2 menu item labeled e.g. "Fedora 23
> (Twenty Three) Developer Mode". This mode is an attempt to
> provide a painless experience for folks who want to try out
> Atomic, but (1) do not want to bother setting up a cloud-
> init datasource, or (2) do not know anything about cloud-
> init, or even (3) do not have much experience with
> Linux overall.
> Since the functionality is completely integrated into the
> image, there are no requirements on the host system, other
> than its ability to boot VMs.
> When booted in Developer Mode, the following happens:
> - cloud-init uses a local built-in datasource
> - a new root password is generated
> - the root user is automatically logged in on tty1
> - the cockpit/ws image is downloaded and started
> - a tmux session is started on tty1 to provide all the
> relevant information (root password, IP address,
> Cockpit console address)
> The first Developer Mode image is available at . I invite
> you all to try it out and let me know what you think! I've
> enabled the plymouth splash screen, which for now uses the
> Fedora theme, but might later be switched over to an Atomic
> I'd still like to give users a more helpful welcome message
> after login. Maybe we could link to a new page on
> projectatomic.io which describes Developer Mode in more
> As Matthew Miller pointed out, one of the drawbacks of this
> approach is that the GRUB 2 menu timeout will probably have
> to be slightly increased to give users more time to make
> their selection (at the expense of also increasing boot
> times in contexts that don't care about Developer Mode).
> In my experience, increasing it by only 1s (for a total of
> 2s) was enough, but we should probably discuss it more. We
> can also minimize this by shipping with a grub.cfg that uses
> a 2s timeout, but with the default of 1s, so that at the
> next grub2-mkconfig (e.g. on an upgrade/rebase), it will go
> back to 1s.
> Code is available at . Some modifications to the
> kickstart file were also necessary.
> TL;DR: I added a new boot menu item to the Atomic image so
> that you don't have to set up cloud-init. You can download
> it from .
>  https://trello.com/c/eK54YRTp
>  https://jlebon.fedorapeople.org/atomic-devmode/latest/
>  https://github.com/jlebon/atomic-devmode
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