[lxc-users] LXD 2.4.1 - Trouble with Cloud Init

[Serge E. Hallyn]

On Fri, Jan 27, 2017 at 06:38:05AM -0600, Neil Bowers wrote:
> Thank you so much - this has been bugging me for weeks.
> 
> I do have a question, however, in regards to the 'write_files' directive -

I'm sorry - I really should start using cloud init more myself after
which I culd be helpful, but for now I don't know the answers to this,
so cc:ing Scott (which I should have done in my previous reply).

> since this runs before users are created (and while I understand that
> having it able to affect more of boot is useful, but it's not documented
> like that anywhere I can find), if I were to create the file in `/etc/skel`
> instead, would any created users pick it up from there?  Or is that ignored
> when creating users with cloud-init ?

I should *think* cloud-init creates users the standard way which would
honor /etc/skel.  Scott?

> Essentially I'm just trying to set up a simple way to put up and tear down
> containers that will have all of my defaults in place from the start.
> 
> Neil
> 
> On Thu, Jan 26, 2017 at 2:00 PM, Serge E. Hallyn <serge at hallyn.com> wrote:
> 
> > Hi,
> >
> > Scott Moser was kind enough to provide this reply:
> >
> > (http://paste.ubuntu.com/23870807/)
> >
> > #!/bin/sh
> >
> > ##
> > ## This is Scott Moser in reply to
> > ##   https://lists.linuxcontainers.org/pipermail/lxc-users/2017-
> > January/012766.html
> > ## The user-data you have has some problems, and is stopping it from
> > working
> > ## as you desire.  This script can be executed to launch an instance
> > ## with the user-data included inside it, and will show it functioning
> > ## correctly.
> > ##
> > ## I did not test, but assume that updating profile accordingly will get
> > you
> > ## the behavior you're after.
> > ##
> > ## Scott
> >
> > ## changes from your user-data
> > # 'sudo' is a string, you had it as a list.
> > # 'write_files':
> > #    - changed path to /root/ (there is no '~' in this scenario, cloud-init
> > #      could possibly interpret that as the default user, but it does not.
> > #    - files are created before users are added... write files runs early
> > #      that means it can affect more of boot, but means it can't write
> > #      files owned by users who do not yet exist.
> > #      there is a bug/feature request for this, we could add a
> > #      'write_files_late' module that ran later and could then populate
> > #      created users directories.
> > #    - you had bad yaml in one part, the 'content' was as if it intended
> > #      to be included in the previous 'path', but was a new list entry.
> > #      basically that 'content' had no 'path'.
> > #
> > # with regard to no errors, you can see the issues with
> > #  journalctl --unit=cloud-init.service
> > # look for 'WARN'.  Also /run/cloud-init/result.json should report errors.
> > #
> > # These should get written to /var/log/cloud-init.log, but in yakkety
> > # you wont see them there yet. (bug 1643990)
> >
> > udata=$(cat <<"EOF"
> > #cloud-config
> > users:
> >   - name: dood
> >     gecos: Mr Dood
> >     ssh_authorized_keys:
> >       - ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEA3I
> > 7VUf2l5gSn5uavROsc5HRDpZdQueUq5ozemNSj8T7enqKHOEaFoU2VoPgGEW
> > C9RyzSQVeyD6s7APMcE82EtmW4skVEgEGSbDc1pvxzxtchBj78hJP6Cf5TCMFSXw+
> > Fz5rF1dR23QDbN1mkHs7adr8GW4kSWqU7Q7NDwfIrJJtO7Hi42GyXtvEONHb
> > iRPOe8stqUly7MvUoN+5kfjBM8Qqpfl2+FNhTYWpMfYdPUnE7u536WqzFmsaqJc
> > tz3gBxH9Ex7dFtrxR4qiqEr9Qtlu3xGn7Bw07/+i1D+ey3ONkZLN+
> > LQ714cgj8fRS4Hj29SCmXp5Kt5/82cD/VN3NtHw== smoser at brickies
> >     sudo: 'ALL=(ALL) NOPASSWD:ALL'
> >     groups: sudo
> >     shell:  /bin/bash
> > write_files:
> >   - owner:  root:root
> >     path: /root/.bash_aliases
> >     content: |
> >       alias dir='ls -Alph --color=auto'
> > apt_proxy: "http://192.168.1.2:8000"
> > EOF
> > )
> >
> > name=$1
> > rel=${2:-yakkety}
> > lxc launch "ubuntu-daily:$rel" "$name" "--config=user.user-data=$udata"
> >
> > -serge
> >

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