[Bug 1532072] [NEW] cloud-init fails with UnicodeDecodeError

Bassam Tabbara bassamtabbara at hotmail.com
Fri Jan 8 03:47:18 UTC 2016 

Public bug reported:

I'm running the latest Ubuntu Wily AMI on EC2 (ami-15b7e87f). When the
instance boots up cloud-init fails with the following exception:

[   69.519513] cloud-init[901]: 2016-01-08 03:43:00,902 - util.py[WARNING]: failed of stage init
[   69.551842] cloud-init[901]: failed run of stage init
[   69.552029] cloud-init[901]: ------------------------------------------------------------
[   69.552427] cloud-init[901]: Traceback (most recent call last):
[   69.552591] cloud-init[901]: File "/usr/bin/cloud-init", line 509, in status_wrapper
[   69.557342] cloud-init[901]: ret = functor(name, args)
[   69.557524] cloud-init[901]: File "/usr/bin/cloud-init", line 272, in main_init
[   69.557695] cloud-init[901]: init.update()
[   69.557859] cloud-init[901]: File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 351, in update
[   69.558020] cloud-init[901]: self._store_userdata()
[   69.558185] cloud-init[901]: File "/usr/lib/python3/dist-packages/cloudinit/stages.py", line 360, in _store_userdata
[   69.558344] cloud-init[901]: processed_ud = self.datasource.get_userdata()
[   69.558502] cloud-init[901]: File "/usr/lib/python3/dist-packages/cloudinit/sources/__init__.py", line 83, in get_userdata
[   69.558660] cloud-init[901]: self.userdata = self.ud_proc.process(self.get_userdata_raw())
[   69.558832] cloud-init[901]: File "/usr/lib/python3/dist-packages/cloudinit/user_data.py", line 96, in process
[   69.560273] cloud-init[901]: self._process_msg(convert_string(blob), accumulating_msg)
[   69.560440] cloud-init[901]: File "/usr/lib/python3/dist-packages/cloudinit/user_data.py", line 342, in convert_string
[   69.560603] cloud-init[901]: data = util.decode_binary(util.decomp_gzip(raw_data))
[   69.560764] cloud-init[901]: File "/usr/lib/python3/dist-packages/cloudinit/util.py", line 86, in decode_binary
[   69.560926] cloud-init[901]: return blob.decode(encoding)
[   69.561094] cloud-init[901]: UnicodeDecodeError: 'utf-8' codec can't decode byte 0x8d in position 0: invalid start byte

I've tracked it down to the following commit:

https://github.com/number5/cloud-
init/commit/a7835683afd19f1ae291cc93f008320a7820b24f#diff-
a543026d533dadf4f39b57d1f65dc1b7R339

The user-data that is set on our instances is beyond my control. Here's
a sample of it:

b'\x8dV\xd9\x8e\xa3H\x16\xfd\x95\x92_\x9d\x99\xec\x06\xf2\x8d\xc5,\x06\x8c1;\xa3\xd1\x88}3;\x18C\xab\xff\xbd\xa32kT\xea\x87\x1e\r\x0f!\xc5\xb9q\xe3\x9es\xe3@\xf0\xc7!\n\xa7\xd4\xbe\xab\x87\xcfC1\xcf\xfd\'\x04=\xba8|\x14\xdd4\x7f\x9eh\x1a\x86\xa2\xa5|$\x13\x14\xe6i;\x9b\xe9\xf8LG\xe8\xf0v\x98\xe6p\x9c\x97\xde*\x9b\xb4[\x00\x1ewm2\x1d>O0\xfcv\xa8\xd3M\x0b[\x9002\x8f\xbc\x1b\xcb\xb9h\xaea\x93\x82\n\xe6\xd2z\x04L\x83\xfcy\\\xa6\xf9\x1fV\xdd\x14\xd9\x03K\x9at\x0e\xf9p\x0e\x0f\x9f\x7f\x00\x92M\xd4u\x1f\xa0\xf8Tv\xed\xc7\xd4\xa7q\x99\x95\xf1G\x02\xe2\x1f?\t\xcf\x00\x06\xa9\x13\x06\x04|/~\xffb\xfc>\xa6\x8f\x14(|_\xa6\xf7\x14\x81\x88\x0f\x04~\xd7\xf9w0\xc20\x05aT\x96d\x08\x1a\xa1\x08\x89#d\x16#h\x1ag\x08\x15\xa5p\x8a\x00)\xa7\x13uJ\xe2\x08\x8e\x00\x9b_\x0c\xa6\xaf\x0e|de\x0b\x88\xf7c\xd9\xce\xa0\xea\x89BI\x14\xa7\t\xb0%\r#\x08E\xa2
!\\\xa7\x8f\xaf.\xa5\x890v\r\xfb\x95\x0f\x16\x03\xe5\xe9\xef\x06\x9a\xf1X\xf6\xf3\x7f`\x10\xf8\x95\xf3E\x9b\x99\xa6\xb4\x89\x1e\x9b\xfa[\xda\xff\xaf\x8a\x8e\x93,\xca\xd2\x88"\xf18\xa2\x93\x98\xa4q\x84HQ\x92"C\x9c\x86\xd18\xc6\x12\x84\xa4\x888\xcc2\x1c\x8dOx\x94\xd11\ng\t\t\xc0\x0cO\xc2\xdfj\xcb\x16\xd0l\xe3\xf4\x1f\x1a>\xfdf\xfd\x9d\xf0\xed\x0f\xe7\xfb\x94@\xf0\xef\xc4\x0e\x7f\xbe\x1d\x96)\xb5\x96\xb6M\x1fB7J\xc0o\x87\xcf\x9f\xfd\xf8;~i\xa6\xff\xc2e\xdevc\xca\xa5\xe3\xfc\xb3z8\xa7\\\x91\xc65\x08g\xe1c\x02\xf1\xf4\x11Ns\x19\xcb\rh\x0b\xd7\xb5Y\x99/\xe3\x17599|\xa2\'\x14\xc1q\n\x98\xedk\xe7[7\xce_
\x8a\xbf}y\xfd6v\xaf\xed\x1b\xc5O\x04\x8d\xbd\x1d\xaaf\xfa5\'P\xf2\xcb\xc8\xe6\x0c\xea\x1f>\xffu\xa8@\xd5\xb7\x03\xb4`G\xd2`\xc0#\xff\x1c\xd8\x9f\x03c0R\xe0\xbe\x8a\x18\xbb\xf7\xfe\n\xe6\x8e\x9c\xc9\x18\xc9\xff\x8cW\x15\xc71~\xb7\xf2\xb9\xaf(\xab\xcf\xb2\xccy`\x8a3\xcb\x186\xc3\xca2\x9b<\x8c\xa3\x0f{\xbcBs\xa1\xe3\xd7\x1b\x8f3F\xe7c\xbd\xc9\xcbF\xe3(\xbc\xff\xcaP}h\xdc\xba\xa4\xb6a\xeco\x02\\\r\xba\x0c#\xf4\x0c\x05K\xbe\xd1\x1a^a\n){w\xcev\x90M\xb1\x10\xbb|m\xa41\x85\x9e\x1bo\x19\xdd9\xf2\x83\x92^\xafDPn\xd1\xcd\xec\xdcj\x12\xb4\xda;z\xce\xee\x19\xa5\xb0\xab\x0c\xd1\x93\xf3\xadsc\xc92\xb5\xc8\x8b\x0c\xe2dq\x86\xd8\xe3}\xe5\xa1\\\xa7\x1b\xac\xae\x1d\x17\xd2k
)F\xb8\x8d\xceR\x89\xd5\xe3\x87\xeeD\xf9\x19\xc7\x11)\xa4\xf4\xa1\xd4\xe8\xca/e\xb7(\xf1-\xab\xf2=\xa9\xf2T1\xeb\x0e"\xab\x9b\x1d>\xca9V\xda\xcb\x8b\xa5k\xd1AM\x83P\xaf\xba\x13C\xfbe\xae\x1b4\x92\xb9\xcc\xee;4\xefV\xc7\xa6y\nq\xc7\xa7]\x87\xc9\xf9b\xa7(\x9b\x9cD\xc7+u+\xb8q\x8f\xe7\xa6\x0f\xc8V\x88Jx\xbaHD\xb0M\xa5
w\xb7\x1d\x7f:!tse"b\xd4\x868\xea\xb19(\xf6\x08\xb3\xe42\xc9\xd1\xd9\x83\xc9\x9e\xa6\xc74s\x85\xa5$\x8bn\x08\\\xe9:\xd1g\x86\xec\xd9\xda\x16\x0b\xa6\xc7\xeb\xe3\xc5\x1e<k\x16\xc6\xed\x86\xba\x8c\xfd\x98\xb0\xf4\x95\xc2\xa2\x073\x97\x97\xdc\x16w?\xbd\xc5\xc8\xcc;w\x895\x92\x18f\xa9\x1duZ]\xde\xd9\x1a\xb9\xa6v\x97GY\xa5\x9eY\xf9\x12\x8eCC\x95\x19\x8f\xe4C\x1bS\xe3\x14]\x9d\x0e\xc9.ao\x9dz\xa5\xe9\x80q\x82\x1d\x86\xfb;z\xfe\xe5\x19\xc1\xe5pD\xe3k0QfM\x96\xb9\xc1\x02^i\xcc\x9cYe\x96\xc9eIr\xf7p\t\xea\xb0\xd9\x99+\x9b\xd7CQ\x97"\xbd\xc2\xc0;\x93\xc0\xf0\x0c\xacY\xf2\xaa1>\xef\x18\x06\xcfs\x8f.\x91\xee\xab^R\xcfH\x04\xe7\xe1\xbe\xba\x08\xbb\xc2z\xe5\x13\xba\xc5<\xfd\xd6\xe9#\xf1\xbe\xab\xa8\xd0\x06.\x01\xdb\xa8\xb3%\x8d\xb3\xa9;\x93\n+\xfc\xbaV\xccK\xe3\xf3U\xab\x0cB\xab\x9c\xf0\x17\x06k|\xbcj\xd67\xa6\xf1\xc6K\xab\x98\x95\xcd\xaf\x0e\xcbh\x9a\xe2\x16p"1\'u\xa3\xa7\x08\xbd\x16\x91X<c\xcc8]\xab\x9a\xd08\xbaL\xdc\xc7\x14H\xda\xd3w\x93G\xd4\xde\xad\xc0\xbb\xa0\x81\'?\x81Vv\xde\x81Vs\x12\xd9m\x10M\r\xc7\xc1{\xb1\xe6\xf99e:\x91e\x94\xf5i\x0f\xcd\xb2+\xbd\xa8:X\x19\xa8\xd8\xd3?\xab\xf8\xaa\xde\x1d\xa7\xd1\xc5]s\x8b*PCd9^!w\xceL\x1d\xa5\xe5\xaep\xe2\x0c\xc2]\xff$\x04\x12j$,)7\xab\xbe\xf1[\xa9\xb3e\xcf\x93"\xe7U\x05\xc4#\xedV7Q1\xf0g/)\xacy\x80\x8b\x8bI\xe3\xc5\xd5\xbaR\xe2U\x13\xaf\x1cFxjs\x82\xaa^\x8f\xe5\x07|\xd9\x8e\xea~\\\x88\x0cCH\x94\xcd\xb1\x89\x02\x1d(\x112
h>T\xea\xe6\xc5\x146\xb3\xc8}^9\xd8\xdeG\x83o\xdf\x1ew\xd2\x0e2c\xbc;\x96\xafq\xb9\xcf\x1e/\xc1\xcbL\xe4\xf4u\xc3\x84\x82\x0e\xba\x13T\xae]3w]2\x01\xc2\xdb6\xbc\x02#a\xb0Q\xbaZ\xba\xa7$\xe6C\xf0\xa3Sv\xbfT\xa3\xa7\xaaz\xd4\xef\xb2\x80\xb9\xadM\xdf\xad\xbb\xe9F<\xe3B\xf5p\xa4\x07Gx\x16\xf1^sA\xdeg4\xc6\xcf*\xa7F\xd2\xd4-\xcf\xea\xdc\xc8\r6H\x03\xff"\xec\x86\xcf\xbd=\xb8\x08B\xba\xf2\x0f\x1d\xf5\x9b\xe1\xbe\x1fw\xd9G\xb8]\xf4\x90L\xb8\xa9uX\xb6\xc5\xb5K\xd9E\xc8u\xb60\x18\xc0\xf9\xcc\x14\xe2D(\x9b1\x9c[\x06\xca\xc2\xa9nm\x9f\xbf\x07\xf4\xdd\xbbg\xda\x98!\\\xd1:\x86eF^\xae?\x07P\xd6c\xb7\x13\x81w\x86\x1d8\xe3\x86\'\xb1\xb5)1\xc5$F\xde\x8f\xf4\x88i\xdc\x06o\xe6>\x86D\xeb.\xafg\xd8\xf7Q\xf0\x14\x840\x97\xc4\xe7\xb1q+U\xaauiT\xd7\xf5%!\xd0-\x0b\x8f\xdd\xeafi\xba\\\xabQ\xcdh\xaa}R\xd1\xc0\xc3a\xeb\x19\xf2N\xd2M\xd5\x19\xca\x13\xd1uS\x80!\xc4\xaaW\xde\xf0/J\x17\xc8\xc0}W\xc68\xab\xac\xc1\xf0\x1a\xc3\xac\xaa!\xdb|\x8d\x8d\xe9L\x8e\x99\xc3Z\xb4b\x9fo\x91\xc3c\x92\x17O\xd7\x95\x13\x0c\x8e\xe95Z\xa4)\xeb\x05\x81o\xa4\xd8\x8f&\x96;\x1c%\xf0\x9c\xd1]\xbb\x01\xf2\xd9}jl\xb2\xb8)\nl\xe3\x82\xa1\x99*\xe3\x08\x87\x7f\xff\x8f{\xe7\xd7/\xcc\xf9;\xfe\xe3\xfb\xd6\xff\xf1\xfe\x03}\x1d\xfe\xfc\x0b'

If I revert the code things seem to work.

** Affects: cloud-init (Ubuntu)
     Importance: Undecided
         Status: New

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Title:
  cloud-init fails with UnicodeDecodeError

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