Hi,
what version of cloud-init are you using?
This functionality is only availble in trunk since 2014-10-01. It is only in
Ubuntu vivid and utopic, not in trusty.
That said, I just launched an instance with this config:
#cloud-config
swap:
size: auto
filename: /swap.img
maxsize: 8G
/var/log/cloud-init.log says:
Jan 15 15:33:18 vivid-20150115-153256 [CLOUDINIT] cc_mounts.py[DEBUG]: suggest
8182 MB swap for 7984 MB memory with '9092 MB' disk given max=8192 MB [max=8182
MB]'
Jan 15 15:33:32 vivid-20150115-153256 [CLOUDINIT] util.py[DEBUG]: creating swap
file '/swap.img' of 8182MB took 14.301 seconds
$ ls -lh /swap.img ; du /swap.img
-rw------- 1 root root 8.0G Jan 15 15:33 /swap.img
8378372 /swap.img
$ free
total used free shared buffers cached
Mem: 8176028 8009932 166096 308 9280 7680480
-/+ buffers/cache: 320172 7855856
Swap: 8378364 0 8378364
Launching another instance without the specified 'max' gives me:
Jan 15 15:44:41 vivid-20150115-154415 [CLOUDINIT] cc_mounts.py[DEBUG]: suggest
2273 MB swap for 7984 MB memory with '9092 MB' disk given max=None [max=2273
MB]'
The algorithm for 'auto' is agreeably nebulus, but I feel that any algoritm is
going to seem odd/broken for some set.
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https://bugs.launchpad.net/bugs/1410824
Title:
Swap space with mounts module not working
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