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Ceph Rados Gateway

Run your own distributed s3 storage in docker.

Ceph cluster creation

Let's assume that you want to test ceph on single machine.
Our lan ip is and hostname is callisto.
To keep configs in sync we will bind-mount them from host
dir /media/backups/ceph/etc. We will use s3.rgw.ceph
as root domain for s3 communication.

Run monitor node:

docker run -d --net=host -e MON_IP= -e MON_NAME=callisto \
  -v /media/backups/ceph/etc:/etc/ceph --name=ceph.mon0 ulexus/ceph-mon

To proceed, we need to enter ceph.mon0 (docker-enter or nsenter) and
allocate 3 osd nodes for future use:

ceph osd create
ceph osd create
ceph osd create

Run 3 osd nodes with ids 0, 1 and 2:

docker run -d -e OSD_ID=0 -v /media/backups/ceph/etc:/etc/ceph \
  -v /media/backups/ceph/osd.0:/var/lib/ceph/osd/ceph-0 --name ceph.osd0 ulexus/ceph-osd

docker run -d -e OSD_ID=1 -v /media/backups/ceph/etc:/etc/ceph \
  -v /media/backups/ceph/osd.1:/var/lib/ceph/osd/ceph-1 --name ceph.osd1 ulexus/ceph-osd

docker run -d -e OSD_ID=2 -v /media/backups/ceph/etc:/etc/ceph \
  -v /media/backups/ceph/osd.2:/var/lib/ceph/osd/ceph-2 --name ceph.osd2 ulexus/ceph-osd

In ceph.mon0 run following commands:

ceph-authtool --create-keyring /etc/ceph/ceph.client.radosgw.keyring
chmod +r /etc/ceph/ceph.client.radosgw.keyring
ceph-authtool /etc/ceph/ceph.client.radosgw.keyring -n client.radosgw.gateway --gen-key
ceph-authtool -n client.radosgw.gateway --cap osd 'allow rwx' --cap mon 'allow rwx' /etc/ceph/ceph.client.radosgw.keyring
ceph -k /etc/ceph/ceph.client.admin.keyring auth add client.radosgw.gateway -i /etc/ceph/ceph.client.radosgw.keyring

Add following to your /etc/ceph/ceph.conf:

keyring = /etc/ceph/ceph.client.radosgw.keyring
rgw socket path = /var/run/ceph/ceph.radosgw.gateway.fastcgi.sock
log file = /var/log/ceph/client.radosgw.gateway.log
rgw print continue = false
rgw_dns_name = s3.rgw.ceph

Enter ceph.mon0 once again to create user:

apt-get update
apt-get install radosgw
radosgw-admin --name client.radosgw.gateway user create --uid alice --display-name "Alice"

You will get keys to use with s3 in the output. Note that in json output
some chars could be escaped, you don't need extra \ in your s3 client settings.

Now let's run rados gateway at last:

docker run -d -p -v /media/backups/ceph/etc:/etc/ceph \
  --name ceph.radosgw0 bobrik/radosgw

Using s3 storage

Usually s3 clients address buckets in format <bucket>.<s3_host>.
To create and use buckets we need to point <s3_host> to
with all subdomains. If you don't have dns, just add following to /etc/hosts
to use s3.rgw.ceph as <s3_host>: s3.rgw.ceph whatever.s3.rgw.ceph

This will also allow you to use bucket whatever. If you need more buckets,
just add them to /etc/hosts.

Release history

  • bobrik/radosgw:1.0 first versioned release.
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