Public bug reported:
We are currently trying to debug a sudden unexpected failure of a cloud-
init v17.1-46 script in Ubuntu v16.04, which fails as below, and we're
hampered by an excessively vague error message as follows:
2018-02-15 11:58:22,627 - util.py[WARNING]: Failed to shellify bootcmd
2018-02-15 11:58:22,634 - util.py[DEBUG]: Failed to shellify bootcmd
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/cloudinit/config/cc_bootcmd.py", line
54, in handle
content = util.shellify(cfg["bootcmd"])
File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1847, in
shellify
% (type_utils.obj_name(args)))
RuntimeError: Unable to shellify type dict which is not a list or string
At warning level we have the error "Failed to shellify bootcmd", which
tells us that cloud-init could not continue, but refuses to tell us why
cloud-init could not continue, leaving us to guess.
At debug level we have the underlying exception from python. Here we get
the error "Unable to shellify type dict which is not a list or string",
which gives us the hint that we have a syntax error, but it doesn't tell
us what line the syntax error is on, or any context for the error.
The error is invisible by inspection, and various yaml linters tell us
our yaml is formatted correctly, although this is too imprecise to tell
us what has gone wrong.
To fix this bug, the error "Failed to shellify bootcmd" needs to be
extended with the reason for the error, and the reason for the error
needs to tell us on what line the error has occurred.
** Affects: cloud-init
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of Yahoo!
Engineering Team, which is subscribed to cloud-init.
https://bugs.launchpad.net/bugs/1749696
Title:
Excessively vague error while parsing yaml: RuntimeError: Unable to
shellify type dict which is not a list or string
Status in cloud-init:
New
Bug description:
We are currently trying to debug a sudden unexpected failure of a
cloud-init v17.1-46 script in Ubuntu v16.04, which fails as below, and
we're hampered by an excessively vague error message as follows:
2018-02-15 11:58:22,627 - util.py[WARNING]: Failed to shellify bootcmd
2018-02-15 11:58:22,634 - util.py[DEBUG]: Failed to shellify bootcmd
Traceback (most recent call last):
File "/usr/lib/python3/dist-packages/cloudinit/config/cc_bootcmd.py", line
54, in handle
content = util.shellify(cfg["bootcmd"])
File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 1847, in
shellify
% (type_utils.obj_name(args)))
RuntimeError: Unable to shellify type dict which is not a list or string
At warning level we have the error "Failed to shellify bootcmd", which
tells us that cloud-init could not continue, but refuses to tell us
why cloud-init could not continue, leaving us to guess.
At debug level we have the underlying exception from python. Here we
get the error "Unable to shellify type dict which is not a list or
string", which gives us the hint that we have a syntax error, but it
doesn't tell us what line the syntax error is on, or any context for
the error.
The error is invisible by inspection, and various yaml linters tell us
our yaml is formatted correctly, although this is too imprecise to
tell us what has gone wrong.
To fix this bug, the error "Failed to shellify bootcmd" needs to be
extended with the reason for the error, and the reason for the error
needs to tell us on what line the error has occurred.
To manage notifications about this bug go to:
https://bugs.launchpad.net/cloud-init/+bug/1749696/+subscriptions
--
Mailing list: https://launchpad.net/~yahoo-eng-team
Post to : yahoo-eng-team@lists.launchpad.net
Unsubscribe : https://launchpad.net/~yahoo-eng-team
More help : https://help.launchpad.net/ListHelp
