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in object gateway installation guide. Signed-off-by: Nilamdyuti Goswami <ngoswami@redhat.com>
256 lines
6.9 KiB
ReStructuredText
256 lines
6.9 KiB
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=============================
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Install Ceph Object Gateway
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=============================
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.. note:: To run the Ceph object gateway service, you should have a running
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Ceph cluster, the gateway host should have access to storage and public
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networks, and SELinux should be in permissive mode in rpm-based distros.
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The :term:`Ceph Object Gateway` daemon runs on Apache and FastCGI.
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To run a :term:`Ceph Object Storage` service, you must install Apache and
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Ceph Object Gateway daemon on the host that is going to provide the gateway
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service, i.e, the ``gateway host``. If you plan to run a Ceph Object Storage
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service with a federated architecture (multiple regions and zones), you must
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also install the synchronization agent.
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.. note:: Previous versions of Ceph shipped with ``mod_fastcgi``. The current
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version ships with ``mod_proxy_fcgi`` instead.
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In distros that ship Apache 2.4 (such as RHEL 7, CentOS 7 or Ubuntu 14.04
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``Trusty``), ``mod_proxy_fcgi`` is already present. When you install the
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``httpd`` package with ``yum`` or the ``apache2`` package with ``apt-get``,
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``mod_proxy_fcgi`` becomes available for use on your server.
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In distros that ship Apache 2.2 (such as RHEL 6, CentOS 6 or Ubuntu 12.04
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``Precise``), ``mod_proxy_fcgi`` comes as a separate package. In
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**RHEL 6/CentOS 6**, it is available in ``EPEL 6`` repo and can be installed with
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``yum install mod_proxy_fcgi``. For **Ubuntu 12.04**, a backport for
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``mod_proxy_fcgi`` is in progress and a bug has been filed for the same.
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See: `ceph radosgw needs mod-proxy-fcgi for apache 2.2`_
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Install Apache
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==============
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To install Apache on the ``gateway host``, execute the following:
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On Debian-based distros, run::
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sudo apt-get install apache2
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On RPM-based distros, run::
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sudo yum install httpd
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Configure Apache
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================
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Make the following changes in Apache's configuration on the ``gateway host``:
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Debian-based distros
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--------------------
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#. Add a line for the ``ServerName`` in ``/etc/apache2/apache2.conf``. Provide
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the fully qualified domain name of the server machine
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(e.g., ``hostname -f``)::
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ServerName {fqdn}
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#. Load ``mod_proxy_fcgi`` module.
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Execute::
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sudo a2enmod proxy_fcgi
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#. Start Apache service::
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sudo service apache2 start
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RPM-based distros
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-----------------
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#. Open the ``httpd.conf`` file::
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sudo vim /etc/httpd/conf/httpd.conf
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#. Uncomment ``#ServerName`` in the file and add the name of your server. Provide
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the fully qualified domain name of the server machine
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(e.g., ``hostname -f``)::
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ServerName {fqdn}
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#. Update ``/etc/httpd/conf/httpd.conf`` to load ``mod_proxy_fcgi`` module. Add
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the following to the file::
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<IfModule !proxy_fcgi_module>
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LoadModule proxy_fcgi_module modules/mod_proxy_fcgi.so
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</IfModule>
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#. Edit the line ``Listen 80`` in ``/etc/httpd/conf/httpd.conf`` with the public
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IP address of the host that you are configuring as a gateway server. Write
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``Listen {IP ADDRESS}:80`` in place of ``Listen 80``.
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#. Start httpd service
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Execute::
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sudo service httpd start
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Or::
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sudo systemctl start httpd
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Enable SSL
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==========
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Some REST clients use HTTPS by default. So you should consider enabling SSL
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for Apache. Use the following procedures to enable SSL.
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.. note:: You can use self-certified certificates. Some client
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APIs check for a trusted certificate authority. You may need to obtain
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a SSL certificate from a trusted authority to use those client APIs.
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Debian-based distros
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--------------------
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To enable SSL on Debian-based distros, execute the following steps:
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#. Ensure that you have installed the dependencies::
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sudo apt-get install openssl ssl-cert
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#. Enable the SSL module::
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sudo a2enmod ssl
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#. Generate a certificate::
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sudo mkdir /etc/apache2/ssl
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sudo openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/apache2/ssl/apache.key -out /etc/apache2/ssl/apache.crt
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#. Restart Apache::
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sudo service apache2 restart
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See the `Ubuntu Server Guide`_ for additional details.
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RPM-based distros
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-----------------
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To enable SSL on RPM-based distros, execute the following steps:
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#. Ensure that you have installed the dependencies::
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sudo yum install mod_ssl openssl
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#. Generate private key::
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openssl genrsa -out ca.key 2048
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#. Generate CSR::
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openssl req -new -key ca.key -out ca.csr
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#. Generate a certificate::
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openssl x509 -req -days 365 -in ca.csr -signkey ca.key -out ca.crt
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#. Copy the files to appropriate locations::
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sudo cp ca.crt /etc/pki/tls/certs
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sudo cp ca.key /etc/pki/tls/private/ca.key
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sudo cp ca.csr /etc/pki/tls/private/ca.csr
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#. Update the Apache SSL configuration file ``/etc/httpd/conf.d/ssl.conf``.
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Give the correct location of ``SSLCertificateFile``::
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SSLCertificateFile /etc/pki/tls/certs/ca.crt
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Give the correct location of ``SSLCertificateKeyFile``::
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SSLCertificateKeyFile /etc/pki/tls/private/ca.key
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Save the changes.
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#. Restart Apache.
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Execute::
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sudo service httpd restart
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Or::
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sudo systemctl restart httpd
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See `Setting up an SSL secured Webserver with CentOS`_ for additional details.
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Install Ceph Object Gateway Daemon
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==================================
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Ceph Object Storage services use the Ceph Object Gateway daemon (``radosgw``)
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to enable the gateway. For federated architectures, the synchronization
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agent (``radosgw-agent``) provides data and metadata synchronization between
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zones and regions.
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Debian-based distros
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--------------------
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To install the Ceph Object Gateway daemon on the `gateway host`, execute the
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following::
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sudo apt-get install radosgw
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To install the Ceph Object Gateway synchronization agent, execute the
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following::
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sudo apt-get install radosgw-agent
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RPM-based distros
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-----------------
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To install the Ceph Object Gateway daemon on the ``gateway host``, execute the
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following::
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sudo yum install ceph-radosgw
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To install the Ceph Object Gateway synchronization agent, execute the
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following::
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sudo yum install radosgw-agent
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Configure The Gateway
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=====================
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Once you have installed the Ceph Object Gateway packages, the next step is
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to configure your Ceph Object Gateway. There are two approaches:
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- **Simple:** A `simple`_ Ceph Object Gateway configuration implies that you
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are running a Ceph Object Storage service in a single data center. So you can
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configure the Ceph Object Gateway without regard to regions and zones.
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- **Federated:** A `federated`_ Ceph Object Gateway configuration implies that
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you are running a Ceph Object Storage service in a geographically distributed
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manner for fault tolerance and failover. This involves configuring your
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Ceph Object Gateway instances with regions and zones.
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Choose the approach that best reflects your cluster.
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.. _ceph radosgw needs mod-proxy-fcgi for apache 2.2: https://bugs.launchpad.net/precise-backports/+bug/1422417
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.. _Ubuntu Server Guide: https://help.ubuntu.com/12.04/serverguide/httpd.html
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.. _Setting up an SSL secured Webserver with CentOS: http://wiki.centos.org/HowTos/Https
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.. _simple: ../../radosgw/config
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.. _federated: ../../radosgw/federated-config
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