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Quick Start Guide

Contents

Overview

Gluster-swift project enables object based access (over Swift and S3 API) to GlusterFS volumes.This guide is a great way to begin using gluster-swift, and can be easily deployed on a single virtual machine. The final result will be a single gluster-swift node.

The instructions provided in this guide has been tested specifically on:

  • CentOS 7
  • Ubuntu 16.04.2 LTS 'xenial'

If you are on other distributions, the steps related to where you fetch the installation packages may vary.

NOTE: In Gluster-Swift, accounts must be GlusterFS volumes.

Setting up GlusterFS

Installing and starting GlusterFS

If on Ubuntu 16.04:

# add-apt-repository ppa:gluster/glusterfs-3.10
# apt-get install glusterfs-server attr
# service glusterfs-server start

If on CentOS 7:

# yum install centos-release-gluster
# yum install glusterfs-server
# service glusterd start

Setting up a GlusterFS volume

You can use separate partitions as bricks. This guide illustrates using loopback devices as bricks.

Create bricks:

# truncate -s 1GB /srv/disk{1..4}
# for i in `seq 1 4`;do mkfs.xfs -i size=512 /srv/disk$i ;done
# mkdir -p /export/brick{1..4}

Add the following lines to /etc/fstab to auto-mount the the bricks on system startup:

/srv/disk1    /export/brick1   xfs   loop,inode64,noatime,nodiratime 0 0
/srv/disk2    /export/brick2   xfs   loop,inode64,noatime,nodiratime 0 0
/srv/disk3    /export/brick3   xfs   loop,inode64,noatime,nodiratime 0 0
/srv/disk4    /export/brick4   xfs   loop,inode64,noatime,nodiratime 0 0

Mount the bricks:

# mount -a

You can now create and start the GlusterFS volume. Make sure your hostname is in /etc/hosts or is DNS-resolvable.

# gluster volume create myvolume replica 2 transport tcp `hostname`:/export/brick{1..4}/data force
# gluster volume start myvolume

Mount the GlusterFS volume:

# mkdir -p /mnt/gluster-object/myvolume
# mount -t glusterfs `hostname`:myvolume /mnt/gluster-object/myvolume

Setting up gluster-swift

Installing Openstack Swift (newton version)

If on Ubuntu 16.04:

# apt install python-pip libffi-dev memcached
# git clone https://github.com/openstack/swift; cd swift
# git checkout -b release-2.10.1 tags/2.10.1
# pip install -r ./requirements.txt
# python setup.py install

If on CentOS 7:

# yum install centos-release-openstack-newton
# yum install openstack-swift-*

Installing gluster-swift (newton version)

If on Ubuntu 16.04:

# git clone https://github.com/gluster/gluster-swift; cd gluster-swift
# pip install -r ./requirements.txt
# python setup.py install

If on CentoOS 7:

# yum install epel-release
# yum install python-scandir python-prettytable git
# git clone https://github.com/gluster/gluster-swift; cd gluster-swift
# python setup.py install

gluster-swift configuration files

As with OpenStack Swift, gluster-swift uses /etc/swift as the directory containing the configuration files. You will need to base the configuration files on the template files provided. On new installations, the simplest way is to copy the *.conf-gluster files to *.conf files as follows:

Copy conf files from etc directory in gluster-swift repo to /etc/swift and rename the template files.

# mkdir -p /etc/swift/
# cp etc/* /etc/swift/
# cd /etc/swift
# for tmpl in *.conf-gluster ; do cp ${tmpl} ${tmpl%.*}.conf; done

Export GlusterFS volumes over gluster-swift

You now need to generate the ring files, which informs gluster-swift which GlusterFS volumes are accessible over the object storage interface. The format is:

# gluster-swift-gen-builders [VOLUME] [VOLUME...]

Where VOLUME is the name of the GlusterFS volume which you would like to access over gluster-swift.

Let's now expose the GlusterFS volume called myvolume you created above by executing the following command:

# gluster-swift-gen-builders myvolume

Start gluster-swift

Use the following commands to start gluster-swift:

# swift-init main start

Using gluster-swift

Create a container

Create a container using the following command:

# curl -i -X PUT http://localhost:8080/v1/AUTH_myvolume/mycontainer

It should return HTTP/1.1 201 Created on a successful creation. You can also confirm that the container has been created by inspecting the GlusterFS volume:

# ls /mnt/gluster-object/myvolume

Create an object

You can now place an object in the container you have just created:

# echo "Hello World" > mytestfile
# curl -i -X PUT -T mytestfile http://localhost:8080/v1/AUTH_myvolume/mycontainer/mytestfile

To confirm that the object has been written correctly, you can compare the test file with the object you created:

# cat /mnt/gluster-object/myvolume/mycontainer/mytestfile

Request the object

Now you can retreive the object and inspect its contents using the following commands:

# curl -i -X GET -o newfile http://localhost:8080/v1/AUTH_myvolume/mycontainer/mytestfile
# cat newfile

What now?

For more information, please visit the following links: