swiftonhpss/doc/markdown/quick_start_guide.md

Quick Start Guide

Contents

• Overview
• System Setup
• SwiftOnFile Setup
• Using SwiftOnFile
• What now?

## Overview SwiftOnFile allows any POSIX complaint filesystem to be used as the backend to the object store OpenStack Swift.

The following guide will get you quickly started with a SwiftOnFile environment on a Fedora or RHEL/CentOS system. This guide is a great way to begin using SwiftOnFile, and can be easily deployed on a single virtual machine. The final result will be a single SwiftOnFile node.

NOTE: In SwiftOnFile a swift account is a mounted FS under path mentioned in configuration parameter.It is assumed you have two xattrr supporting FS mounted under certain paths.We suggest you to start with two xfs formatted FS then you can move on to other FS that supports xattr.For setting up gluster volume in particular you can look here GlusterFS Quick Start Guide

## System Setup

Prerequisites on CentOS/RHEL

On CentOS/RHEL you may need to EPEL repo.Please refer to EPEL for more information on how to setup the EPEL repo.

SwiftOnfile requires corresponding OpenStack Swift release packages.There are two possible ways to get OpenStack Swift packages.

1. Get & build the OpenStack swift source from github.(This should work for all linux flavors)

   a.) Git clone the required branch (assume icehouse)

   git clone -b icehouse-stable https://github.com/openstack/swift.git 
   

   b.)Install the prerequisite

   python-pip install -r requirements.txt
   python-pip install -r test-requirements.txt
   

   c.)Install the packages

   python setup.py install
   

   d.) Please refer to the OpenStack swift SAIO guide, if you face any difficulty in doing above.

2. Use the Stable RDO release (Fedora/RHEL/CentOS)

   a.) Please setup corresponding Red Hat RDO release repo (assume icehouse)

   yum install -y http://repos.fedorapeople.org/repos/openstack/openstack-icehouse/rdo-release-icehouse-3.noarch.rpm 
   

   b.) Install required rpms:

   yum install -y openstack-swift-proxy openstack-swift-account openstack-swift-container\
   openstack-swift-object memcached python-swiftclient python-keystoneclient 
   

Install SwiftOnFile

1. Install from source

   a.) Git clone the required branch (assume icehouse)

   git clone -b icehouse https://github.com/swiftonfile/swiftonfile.git

   b.)Install the prerequisite

    python-pip install -r requirements.txt
    python-pip install -r test-requirements.txt
   

   c.)Install the packages

    python setup.py install
   

2. Using RPMs

   a.) Download the rpms from Jenkins CI

   b.)Install the RPM by executing the following: yum install -y

Enabling Swift Service available accross reboots

chkconfig openstack-swift-proxy on
chkconfig openstack-swift-account on
chkconfig openstack-swift-container on
chkconfig openstack-swift-object on

Fedora 19 Adjustment

Currently SwiftOnFile requires its processes to be run as root. You need to edit the openstack-swift-*.service files in /etc/systemd/system/multi-user.target.wants and change the User entry value to root.

Then run the following command to reload the configuration:

systemctl --system daemon-reload

Configuration

As with OpenStack Swift, SwiftOnFile 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 RPM based installations, the simplest way is to copy the *.conf-gluster files to *.conf files as follows:

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

Else you can base your config files on [test code ][].

Generate Ring Files

You now need to generate the ring files, which inform SwiftOnFile which FS volumes are accessible over the object storage interface. This is a borrowed legacy from gluster-swift and it will soon change. This script uses OpenStack Swift ring builder with the fundamental assumption that the replication/sync/HA/etc are provided by underlying FS (gluster in this case).The format is

gluster-swift-gen-builders [mount-point-name] [mount-point-name...]

Where mount-point-name is the name of the a directory in the path mentioned in /etc/swift{account,object,container}.conf under the section [DEFAULT] for parameter 'devices'.For ex: If 'device' parameter has the value '/mnt/FS-objects' and you mounted two gluster/xfs volumes on /mnt/FS-objects/gfs-vol1 & /mnt/FS-objects/gfs-vol2 then the command would look like this:

gluster-swift-gen-builders gfs-vol1 gfs-vol2

Start swift services using the following commands:

service openstack-swift-object start
service openstack-swift-container start
service openstack-swift-account start
service openstack-swift-proxy start

Or using

swift-init main start

## Using SwiftOnFile

Create a container

Create a container using the following command:

curl -v -X PUT http://localhost:8080/v1/AUTH_gfs-vol1/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 FS:

ls /mnt/FS-object/gfs-vol1

Create an object

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

echo "Hello World" > mytestfile
curl -v -X PUT -T mytestfile http://localhost:8080/v1/AUTH_gfs-vol1/mycontainer/mytestfile

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

cat /mnt/FS-object/gfs-vol1/mycontainer/mytestfile

Request the object

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

curl -v -X GET -o newfile http://localhost:8080/v1/AUTH_gfs-vol1/mycontainer/mytestfile
cat newfile

You can also use etag information provided while you do HEAD on object and compare it with md5sum of the file on your FS.

## What now? For more information, please visit the following links:

• Authentication Services Start Guide
• GlusterFS Quick Start Guide
• OpenStack Swift API

[test code] : https://github.com/swiftonfile/swiftonfile/tree/master/test/functional_auth/tempauth/conf/