Public bug reported:
When running under ubuntu-core 16 images, /etc/passwd is read-only.
If my user-data includes any non-default username, creation fails due to
the read-only nature of the image.
This is addressed by useradd/groupadd including a command line flag,
--extrausers
which instructs the command to look for a different user/group database in
/var/lib/extrausers , which is writable in the ubuntu-core 16 image.
The cc_user_groups module though is not aware of this.
The Distro base-class could check if the system it's running on is snappy (see
cc_snappy.py)
and if so, append the --extrausers parameter to the useradd/groupadd commands.
1) release is Xenial (ubuntu-core 16)
2) cloud-init present is: 0.7.7~bzr1256-0ubuntu1~16.04.1
3) useradd bob -m should create the user bob
4) useradd fails due to readonly /etc/{passwd,group,shadow}
** Affects: cloud-init
Importance: High
Assignee: Ryan Harper (raharper)
Status: Confirmed
** Affects: cloud-init (Ubuntu)
Importance: High
Status: Confirmed
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https://bugs.launchpad.net/bugs/1619393
Title:
cloud-init useradd/groupadd fails on ubuntu-core-16 with readonly
/etc/passwd
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