Public bug reported: The cloud config settings
# swap can also be set up by the 'mounts' module # default is to not create any swap files, because 'size' is set to 0 swap: filename: /swap.img size: "auto" or size in bytes maxsize: size in bytes will not result in a swap space. Some big questions are present with respect to the operational logic behind this cloud config setting: a) which (underlying) command is used to create the swap space? b) is being made use of sparse files? (not desirable for swap. Answer is probably "not", given "size: auto" option) c) what are the requirements for creation of swap? (should a partition exist and/or should the partition type be 82. Answer is probably "no", given the fact that a swap file is created) In essence, some problems encountered when creating swap manually (instead of using the swap config setting): 1) when creating a swap file on the ephemeral disk: mkswap does not work probably (error: ...should at least be 40Kib) 2) when creating a separate partition of type 83 (hence preventing mkswap errors): - swap file (manually created) exists, but is not active as swap, - swap file (using the swap config setting) does not exist, 3) when creating a swap partition (of type 82): swap is not active and/or not mounted (and swap file creation therefore fails) Note the use of partitions is not desirable for swap purposes, the sole intent was to test for the causes of failure. Finally, some additional documentation for creating swap space with cloud-config would be (very) desirable). Kind regards.... ** Affects: cloud-init (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1410824 Title: Swap space with mounts module not working To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1410824/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs