openstack/kolla-ansible
Code Issues Proposed changes

Document how to use loopback devices for Swift

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People commonly want to use loopback devices to evaulate or develop on
Swift.  The steps for this are slightly different than those for
physical block devices.

Also make some small fix ups to the title formatting.

Change-Id: I0c1cb4a261f264dc56bd065ab137e5ee79e773f8
This commit is contained in:
Paul Bourke 2016-03-08 16:37:36 +00:00
parent 023daa574f
commit 9588fd1d99
1 changed files with 19 additions and 5 deletions
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24
doc/swift-guide.rst
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@ -11,8 +11,8 @@ Before running Swift we need to generate "rings", which are binary compressed
files that at a high level let the various Swift services know where data is in files that at a high level let the various Swift services know where data is in
the cluster. We hope to automate this process in a future release. the cluster. We hope to automate this process in a future release.
disks with partition table (recommended) Disks with a partition table (recommended)
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Swift also expects block devices to be available for storage. To prepare a disk Swift also expects block devices to be available for storage. To prepare a disk
for use as Swift storage device, a special partition name and filesystem label for use as Swift storage device, a special partition name and filesystem label
@ -30,8 +30,22 @@ Follow the example below to add 3 disks for an AIO demo setup.
(( index++ )) (( index++ ))
done done
disks without partition table For evaluation, loopback devices can be used in lieu of real disks:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
::
index=0
for d in sdc sdd sde; do
free_device=$(losetup -f)
fallocate -l 1G /tmp/$d
losetup $free_device /tmp/$d
parted $free_device -s -- mklabel gpt mkpart KOLLA_SWIFT_DATA 1 -1
sudo mkfs.xfs -f -L d${index} ${free_device}p1
(( index++ ))
done
Disks without a partition table
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Kolla also supports unpartitioned disk (filesystem on /dev/sdc instead of Kolla also supports unpartitioned disk (filesystem on /dev/sdc instead of
/dev/sdc1) detection purely based on filesystem label. This is generally not a /dev/sdc1) detection purely based on filesystem label. This is generally not a
@ -46,7 +60,7 @@ ansible/roles/swift/defaults/main.yml
swift_devices_match_mode: "prefix" swift_devices_match_mode: "prefix"
swift_devices_name: "swd" swift_devices_name: "swd"
rings Rings
~~~~~ ~~~~~
Run following commands locally to generate Rings for AIO demo setup. The Run following commands locally to generate Rings for AIO demo setup. The