How do we use swap in QualityBox

eqt · October 20, 2017, 1:03pm

Notes from when I initially added swap to QualityBox
https://freephile.org/wiki/Swap

The play:

freephile/qb/blob/579d97e10c9ab944743d450a58bb094ec3912dac/tasks/swap.yml

---

- name: Write swap file
  command: fallocate -l {{ swapfile_size }} {{ swapfile_location }} creates={{ swapfile_location }}
  register: write_swapfile
  when: swapfile_size != false

- name: Set swapfile permissions
  file: path={{ swapfile_location }} mode=0600
  when: swapfile_size != false

- name: Create swapfile
  command: mkswap {{ swapfile_location }}
  register: create_swapfile
  when: swapfile_size != false and write_swapfile.changed

- name: Enable swapfile
  command: swapon {{ swapfile_location }}
  when: swapfile_size != false and create_swapfile.changed

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The play should definitely be reviewed and updated. (It looks like it’s not idempotent in the fstab step)

eqt · October 20, 2017, 1:08pm

Can we dynamically determine the appropriate size for swap? Swap in QB is currently defaulted at 4GB which wouldn’t work at all on a 2GB RAM small-footprint system.