nova boot hangs with --user-data file larger than about 800 bytes

[Lee Thompson]

I'm on Ubuntu Server 12.04, fully up to date.

I have a post boot script passed to nova boot via the --user-data option. Its been working fine until I added some logic and it grew from 600 bytes to over 900 bytes. After this it hangs.

I reproduced the problem with a --user-data script of all comments of 600 bytes which worked and another script of all comments that was 950 bytes and it locked up.

[Davanum Srinivas (DIMS) (dims-v)]

Lee, Do you see any errors in the logs?

[Tim (tsm)]

Davanum, this appears to be a hardcoded limit in the wsgi config on the max size of json objects. I'll try to find the log dump I made, but it should be a one line change to up the limit from 861 bytes, which I believe is the default.

[Lee Thompson (stagr.lee)]

Debug output of nova client

[Lee Thompson (stagr.lee)]

One example which fails

[Lee Thompson (stagr.lee)]

I think the ec2 limit is 16K

[Joe Gordon (jogo)]

I just tried to reproduce this with trunk (devstack) and was unable to reproduce so perhaps this has been fixed (I tried up to a 19K user-data file).