Swift in Kolla¶
Overview¶
Kolla can deploy a full working Swift setup in either a all-in-one or multinode setup.
Disks with a partition table (recommended)¶
Swift requires block devices to be available for storage. To prepare a disk for use as a Swift storage device, a special partition name and filesystem label need to be added.
The following should be done on each storage node, the example is shown for three disks:
Warning
ALL DATA ON DISK will be LOST!
index=0
for d in sdc sdd sde; do
parted /dev/${d} -s -- mklabel gpt mkpart KOLLA_SWIFT_DATA 1 -1
sudo mkfs.xfs -f -L d${index} /dev/${d}1
(( index++ ))
done
For evaluation, loopback devices can be used in lieu of real disks:
index=0
for d in sdc sdd sde; do
free_device=$(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
/dev/sdc1) detection purely based on filesystem label. This is generally
not a recommended practice but can be helpful for Kolla to take over Swift
deployment already using disk like this.
Given hard disks with labels swd1, swd2, swd3, use the following settings in
ansible/roles/swift/defaults/main.yml.
swift_devices_match_mode: "prefix"
swift_devices_name: "swd"
Rings¶
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 the cluster. We hope to automate this process in a future release.
The following example commands should be run from the operator node to
generate rings for a demo setup. The commands work with disks with partition
table example listed above. Please modify accordingly if your setup is
different.
Prepare for Rings generating¶
To prepare for Swift Rings generating, run the following commands to initialize
the environment variable and create /etc/kolla/config/swift directory:
STORAGE_NODES=(192.168.0.2 192.168.0.3 192.168.0.4)
KOLLA_SWIFT_BASE_IMAGE="kolla/oraclelinux-source-swift-base:4.0.0"
mkdir -p /etc/kolla/config/swift
Generate Object Ring¶
To generate Swift object ring, run the following commands:
docker run \
--rm \
-v /etc/kolla/config/swift/:/etc/kolla/config/swift/ \
$KOLLA_SWIFT_BASE_IMAGE \
swift-ring-builder \
/etc/kolla/config/swift/object.builder create 10 3 1
for node in ${STORAGE_NODES[@]}; do
for i in {0..2}; do
docker run \
--rm \
-v /etc/kolla/config/swift/:/etc/kolla/config/swift/ \
$KOLLA_SWIFT_BASE_IMAGE \
swift-ring-builder \
/etc/kolla/config/swift/object.builder add r1z1-${node}:6000/d${i} 1;
done
done
Generate Account Ring¶
To generate Swift account ring, run the following commands:
docker run \
--rm \
-v /etc/kolla/config/swift/:/etc/kolla/config/swift/ \
$KOLLA_SWIFT_BASE_IMAGE \
swift-ring-builder \
/etc/kolla/config/swift/account.builder create 10 3 1
for node in ${STORAGE_NODES[@]}; do
for i in {0..2}; do
docker run \
--rm \
-v /etc/kolla/config/swift/:/etc/kolla/config/swift/ \
$KOLLA_SWIFT_BASE_IMAGE \
swift-ring-builder \
/etc/kolla/config/swift/account.builder add r1z1-${node}:6001/d${i} 1;
done
done
Generate Container Ring¶
To generate Swift container ring, run the following commands:
docker run \
--rm \
-v /etc/kolla/config/swift/:/etc/kolla/config/swift/ \
$KOLLA_SWIFT_BASE_IMAGE \
swift-ring-builder \
/etc/kolla/config/swift/container.builder create 10 3 1
for node in ${STORAGE_NODES[@]}; do
for i in {0..2}; do
docker run \
--rm \
-v /etc/kolla/config/swift/:/etc/kolla/config/swift/ \
$KOLLA_SWIFT_BASE_IMAGE \
swift-ring-builder \
/etc/kolla/config/swift/container.builder add r1z1-${node}:6002/d${i} 1;
done
done
for ring in object account container; do
docker run \
--rm \
-v /etc/kolla/config/swift/:/etc/kolla/config/swift/ \
$KOLLA_SWIFT_BASE_IMAGE \
swift-ring-builder \
/etc/kolla/config/swift/${ring}.builder rebalance;
done
For more information, see https://docs.openstack.org/project-install-guide/object-storage/ocata/initial-rings.html
Deploying¶
Enable Swift in /etc/kolla/globals.yml:
enable_swift : "yes"
Once the rings are in place, deploying Swift is the same as any other Kolla Ansible service:
# kolla-ansible deploy -i <path/to/inventory-file>
Verification¶
A very basic smoke test:
$ openstack container create mycontainer
+---------------------------------------+--------------+------------------------------------+
| account | container | x-trans-id |
+---------------------------------------+--------------+------------------------------------+
| AUTH_7b938156dba44de7891f311c751f91d8 | mycontainer | txb7f05fa81f244117ac1b7-005a0e7803 |
+---------------------------------------+--------------+------------------------------------+
$ openstack object create mycontainer README.rst
+---------------+--------------+----------------------------------+
| object | container | etag |
+---------------+--------------+----------------------------------+
| README.rst | mycontainer | 2634ecee0b9a52ba403a503cc7d8e988 |
+---------------+--------------+----------------------------------+
$ openstack container show mycontainer
+--------------+---------------------------------------+
| Field | Value |
+--------------+---------------------------------------+
| account | AUTH_7b938156dba44de7891f311c751f91d8 |
| bytes_used | 6684 |
| container | mycontainer |
| object_count | 1 |
+--------------+---------------------------------------+
$ openstack object store account show
+------------+---------------------------------------+
| Field | Value |
+------------+---------------------------------------+
| Account | AUTH_7b938156dba44de7891f311c751f91d8 |
| Bytes | 6684 |
| Containers | 1 |
| Objects | 1 |
+------------+---------------------------------------+
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