Cloudinit user-data file(Big size - around 2000 bytes) fails to download from metadata server

[sureshkvl]

OpenContrail version : 3.2
Openstack : Mitaka

My user-data(cloudinit) shell script size is (2864 bytes).

When i launch a VM with the user-data, VM fails to download this script via cloudinit. It retries for 6 times and fails.( verified in the cloud-init.log file . Log file attahced)

On further debugging, In the tap interfaces, few TCP segments for user-data script packets are missing/corrupted when cloudinit queries at boot time.

Note :

But after VM is up, when i try to SSH and manually download the user-data ( wget http://169.254.169.254/2009-04-04/user-data) , it works fine.

Also, Smaller size script file, also works fine in cloudinit.

Log:
=====

nova boot --flavor 2 --image e3e24b37-824a-458d-b820-2e525ed645cd --key-name test-key --security-groups hr_secgroup --user-data myscript.sh --nic net-id=72845273-dfa0-492a-b853-d72eee54aa50 server1

Attached the myscript.sh file and cloud-init.log.

[sureshkvl (sureshkumar-s)]

Logs:
==============

Aug 28 07:22:03 localhost [CLOUDINIT] url_helper.py[DEBUG]: [1/6] open 'http://169.254.169.254/2009-04-04/user-data' with {'url': 'http://169.254.169.254/2009-04-04/user-data', 'headers': {'User-Agent': 'Cloud-Init/0.7.6'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 5.0} configuration
Aug 28 07:22:03 localhost [CLOUDINIT] url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
Aug 28 07:22:04 localhost [CLOUDINIT] url_helper.py[DEBUG]: [2/6] open 'http://169.254.169.254/2009-04-04/user-data' with {'url': 'http://169.254.169.254/2009-04-04/user-data', 'headers': {'User-Agent': 'Cloud-Init/0.7.6'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 5.0} configuration
Aug 28 07:22:04 localhost [CLOUDINIT] url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
Aug 28 07:22:05 localhost [CLOUDINIT] url_helper.py[DEBUG]: [3/6] open 'http://169.254.169.254/2009-04-04/user-data' with {'url': 'http://169.254.169.254/2009-04-04/user-data', 'headers': {'User-Agent': 'Cloud-Init/0.7.6'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 5.0} configuration
Aug 28 07:22:05 localhost [CLOUDINIT] url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
Aug 28 07:22:06 localhost [CLOUDINIT] url_helper.py[DEBUG]: [4/6] open 'http://169.254.169.254/2009-04-04/user-data' with {'url': 'http://169.254.169.254/2009-04-04/user-data', 'headers': {'User-Agent': 'Cloud-Init/0.7.6'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 5.0} configuration
Aug 28 07:22:06 localhost [CLOUDINIT] url_helper.py[DEBUG]: Please wait 1 seconds while we wait to try again
Aug 28 07:22:07 localhost [CLOUDINIT] url_helper.py[DEBUG]: [5/6] open 'http://169.254.169.254/2009-04-04/user-data' with {'url': 'http://169.254.169.254/2009-04-04/user-data', 'headers': {'User-Agent': 'Cloud-Init/0.7.6'}, 'allow_redirects': True, 'method': 'GET', 'timeout': 5.0} configuration

Aug 28 07:22:08 localhost [CLOUDINIT] util.py[DEBUG]: Failed fetching userdata from url http://169.254.169.254/2009-04-04/user-data#012Traceback (most recent call last):#012 File "/usr/lib/python2.7/dist-packages/cloudinit/ec2_utils.py", line 155, in get_instance_userdata#012 exception_cb=exception_cb)#012 File "/usr/lib/python2.7/dist-packages/cloudinit/util.py", line 704, in read_file_or_url#012 exception_cb=exception_cb)#012 File "/usr/lib/python2.7/dist-packages/cloudinit/url_helper.py", line 257, in readurl#012 raise excps[-1]#012UrlError: ('Connection broken: IncompleteRead(0 bytes read)', IncompleteRead(0 bytes read))