maas-devel team mailing list archive

[Diogo Matsubara <matsubara@xxxxxxxxxxxxx>]

On Fri, Jan 18, 2013 at 1:39 PM, Scott Moser <smoser@xxxxxxxxxx> wrote:

> On Fri, 18 Jan 2013, Diogo Matsubara wrote:
>
> > I added these instructions to the wiki:
> > https://wiki.canonical.com/Launchpad/MAASTesting
>
> As this is a public list, is there a publicly available document like
> this?
>

Good point! The MAASTesting doc contains information about our internal QA
lab, so it won't be useful for the general public. I agree the debugging
info is more generally useful for any MAAS user, so I'll talk to Nick to
have this added to the official documentation on
http://maas.ubuntu.com/docs/troubleshooting.html

Cheers,

Diogo


> >
> > Thanks Scott!
> >
> >
> > On Thu, Jan 17, 2013 at 12:08 PM, Diogo Matsubara
> > <matsubara@xxxxxxxxxxxxx>wrote:
> >
> > > Hi Scott,
> > >
> > > thanks for these instructions, they're very useful.
> > > There are two small corrections to the script you sent below:
> > >
> > > On Thu, Dec 13, 2012 at 12:35 PM, Scott Moser <smoser@xxxxxxxxxx>
> wrote:
> > >
> > >> Hey all,
> > >>
> > >> Whenever people have problems with enlistment or commissioning, often
> > >> times debugging from within the ephemeral image is needed to see whats
> > >> going on.
> > >>
> > >> Below is a general "how to get around" guide.
> > >>
> > >> ### backdoor (add a login) to ephemeral images ###
> > >> # If you cannot login to an instance, you might have to "backdoor it"
> > >> # in order to see what is going wrong.  I wrote a simple utility
> > >> # that injects a user and password into an image.  Heres how to
> > >> # add a 'backdoor' user with a password to your images.
> > >> bzr branch lp:~smoser/+junk/backdoor-image
> > >> imgs=$(echo var/lib/maas/ephemeral/*/*/*/*/*.img)
> > >> for img in $imgs; do
> > >>   [ -f "$img.dist" ] || cp -a --sparse=always $img.dist
> > >> done
> > >>
> > >
> > > I assume you wanted to make a backup copy of the original image files.
> The
> > > cp command is missing an argument though:
> > >
> > >    [ -f "$img.dist" ] || cp -a --sparse=always $img $img.dist
> > >
> > > Is that the original intention?
> > >
> > >
> > > for img in $imgs; do
> > >>   sudo ./backdoor-image -v --user=backdoor --password-auth
> > >> --password=ubuntu
> > >> done
> > >>
> > >
> > > Likewise here:
> > >   sudo ./backdoor-image -v --user=backdoor --password-auth
> > > --password=ubuntu $img
> > >
> > >
> > >
> > >>
> > >> ### Inside the ephemeral image  ###
> > >>
> > >> ## Important files for debugging:
> > >> # Someone is likely to ask you for these things to help debug
> > >> /var/log/cloud-init.log
> > >> /var/log/boot.log
> > >> /var/log/cloud-init-output.log
> > >>
> > >> # After enlistment or commissioning, the user-data from maas instructs
> > >> # the system to poweroff.  To stop that from happening, you can just
> > >> # touch a file in /tmp.
> > >> touch /tmp/block-poweroff
> > >>
> > >> ## maas credentials:
> > >> # maas credentials can be found in 2 places:
> > >> # * from the cmdline you'll see a 'url=' or 'cloud-config-url='
> parameter
> > >> #   You can get the cloud-config from that url, which will have
> > >> #   credentials.
> > >> #   example:
> > >> #    $ sed -n 's,.*url=\([^ ]*\).*,\1,p' /proc/cmdline
> > >> #
> > >>
> http://10.55.60.194/MAAS/metadata/latest/enlist-preseed/?op=get_enlist_preseed
> > >> # * from /etc/cloud/cloud.cfg.d/91_kernel_cmdline_url
> > >> #   The file was pulled from url= parameter by cloud-init
> > >> #   $ sudo cat /etc/cloud/cloud.cfg.d/91_kernel_cmdline
> > >>
> > >> ### maas datasource ###
> > >> # the cloud-init datasource for MAAS can be invoked as a 'main' for
> > >> # debugging purposes. To do so, you need to know the url for the maas
> > >> # datasource and a config file that contains credentials.
> > >> #
> > >> $ cfg=$(echo /etc/cloud/cloud.cfg.d/*_cmdline_url.cfg)
> > >> $ echo $cfg
> > >> /etc/cloud/cloud.cfg.d/91_kernel_cmdline_url.cfg
> > >>
> > >> # now get the metadata_url from there.
> > >> $ url=$(sudo awk '$1 == "metadata_url:" { print $2 }' $cfg)
> > >> $ echo $url
> > >> http://10.55.60.194/MAAS/metadata/enlist
> > >>
> > >> # invoke the client
> > >> # /usr/share/pyshared/cloudinit/sources/DataSourceMAAS.py
> > >> # the client has --help Usage also, but here is an example on how
> > >> # to use it.
> > >> $ maasds="/usr/share/pyshared/cloudinit/sources/DataSourceMAAS.py"
> > >> $ sudo python $maasds --config=$cfg get $url
> > >> == http://10.55.60.194/MAAS/metadata/enlist ==
> > >> 2012-03-01
> > >> latest
> > >>
> > >> $ sudo python $maasds --config=$cfg get
> > >> $url/latest/meta-data/local-hostname
> > >> maas-enlisting-node
> > >>
> > >> --
> > >> Mailing list: https://launchpad.net/~maas-devel
> > >> Post to     : maas-devel@xxxxxxxxxxxxxxxxxxx
> > >> Unsubscribe : https://launchpad.net/~maas-devel
> > >> More help   : https://help.launchpad.net/ListHelp
> > >>
> > >
> > > Cheers,
> > > --
> > > Diogo M. Matsubara
> > >
> >
> >
> >
> > --
> > Diogo M. Matsubara
> >
>



-- 
Diogo M. Matsubara