Merge "Initial Sahara documentation"
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<xi:include href="section_getstart_telemetry.xml"/>
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<xi:include href="section_getstart_orchestration.xml"/>
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<xi:include href="section_getstart_trove.xml"/>
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<xi:include href="section_getstart_sahara.xml"/>
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</section>
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<section xml:id="feedback">
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<title>Feedback</title>
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48
doc/common/section_getstart_sahara.xml
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48
doc/common/section_getstart_sahara.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="sahara-service">
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<title>Data processing service</title>
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<para>The Data processing service for OpenStack (sahara) aims to provide
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users with simple means to provision data processing (Hadoop, Spark)
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clusters by specifying several parameters like Hadoop version, cluster
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topology, nodes hardware details and a few more. After user fills in
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all the parameters, the Data processing service deploys the cluster in a
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few minutes. Also sahara provides means to scale already provisioned
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clusters by adding/removing worker nodes on demand.
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</para>
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<para>The solution addresses the following use cases:
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<itemizedlist>
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<listitem><para>Fast provisioning of Hadoop clusters on OpenStack for
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development and QA.</para></listitem>
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<listitem><para>Utilization of unused compute power from general
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purpose OpenStack IaaS cloud.</para></listitem>
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<listitem><para>Analytics-as-a-Service for ad-hoc or bursty analytic
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workloads.</para></listitem>
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</itemizedlist>
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</para>
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<para>Key features are:
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<itemizedlist>
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<listitem><para>Designed as an OpenStack component.</para></listitem>
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<listitem><para>Managed through REST API with UI available as part
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of OpenStack dashboard.</para></listitem>
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<listitem><para>Support for different Hadoop distributions:
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<itemizedlist>
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<listitem><para>Pluggable system of Hadoop installation
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engines.</para></listitem>
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<listitem><para>Integration with vendor specific management tools,
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such as Apache Ambari or Cloudera Management Console.</para></listitem>
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</itemizedlist>
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</para></listitem>
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<listitem><para>Predefined templates of Hadoop configurations with
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ability to modify parameters.</para></listitem>
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<listitem><para>User-friendly UI for ad-hoc analytics queries based on
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Hive or Pig.</para></listitem>
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</itemizedlist>
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</para>
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</section>
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@ -219,6 +219,7 @@
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<xi:include href="ch_heat.xml"/>
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<xi:include href="ch_ceilometer.xml"/>
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<xi:include href="ch_trove.xml"/>
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<xi:include href="ch_sahara.xml"/>
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<xi:include href="ch_launch-instance.xml"/>
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<xi:include href="app_reserved_uids.xml"/>
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<xi:include href="../common/app_support.xml"/>
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19
doc/install-guide/ch_sahara.xml
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19
doc/install-guide/ch_sahara.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<chapter xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="ch_sahara">
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<title>Add the Data processing service</title>
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<para>The Data processing service (sahara) enables users to provide a
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scalable data processing stack and associated management interfaces.
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This includes provision and operation of data processing clusters as
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well as scheduling and operation of data processing jobs.
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</para>
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<warning><para>This chapter is a work in progress. It may contain
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incorrect information, and will be updated frequently.</para></warning>
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<xi:include href="../common/section_getstart_sahara.xml"/>
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<xi:include href="section_sahara-install.xml" />
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<xi:include href="section_sahara-verify.xml" />
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</chapter>
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96
doc/install-guide/section_sahara-install.xml
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96
doc/install-guide/section_sahara-install.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="sahara-install">
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<title>Install the Data processing service</title>
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<para>This procedure installs the Data processing service (sahara) on the
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controller node.</para>
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<para>To install the Data processing service on the controller:</para>
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<procedure>
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<step os="rhel;centos;fedora;opensuse;sles">
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<para>Install required packages:</para>
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<screen os="rhel;centos;fedora"><prompt>#</prompt> <userinput>yum install openstack-sahara python-saharaclient</userinput></screen>
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<screen os="opensuse;sles"><prompt>#</prompt> <userinput>zypper install openstack-sahara python-saharaclient</userinput></screen>
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</step>
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<step os="ubuntu;debian">
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<warning><para>You need to install required packages. For now, sahara
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doesn't have packages for Ubuntu and Debian.
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Documentation will be updated once packages are available. The rest
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of this document assumes that you have sahara service packages
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installed on the system.</para></warning>
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</step>
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<step>
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<para>Edit <filename>/etc/sahara/sahara.conf</filename> configuration file</para>
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<substeps>
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<step><para>First, edit <option>connection</option> parameter in
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the <literal>[database]</literal> section. The URL provided here
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should point to an empty database. For instance, connection
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string for MySQL database will be:
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<programlisting language="ini">connection = mysql://sahara:<replaceable>SAHARA_DBPASS</replaceable>@<replaceable>controller</replaceable>/sahara</programlisting>
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</para></step>
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<step><para>Switch to the <literal>[keystone_authtoken]</literal>
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section. The <option>auth_uri</option> parameter should point to
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the public Identity API endpoint. <option>identity_uri</option>
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should point to the admin Identity API endpoint. For example:
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<programlisting language="ini">auth_uri = http://<replaceable>controller</replaceable>:5000/v2.0
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identity_uri = http://<replaceable>controller</replaceable>:35357</programlisting>
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</para></step>
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<step><para>Next specify <literal>admin_user</literal>,
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<literal>admin_password</literal> and
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<literal>admin_tenant_name</literal>. These parameters must specify
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a keystone user which has the <literal>admin</literal> role in the
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given tenant. These credentials allow sahara to authenticate and
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authorize its users.
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</para></step>
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<step><para>Switch to the <literal>[DEFAULT]</literal> section.
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Proceed to the networking parameters. If you are using Neutron
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for networking, then set <literal>use_neutron=true</literal>.
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Otherwise if you are using <systemitem>nova-network</systemitem> set
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the given parameter to <literal>false</literal>.
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</para></step>
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<step><para>That should be enough for the first run. If you want to
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increase logging level for troubleshooting, there are two parameters
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in the config: <literal>verbose</literal> and
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<literal>debug</literal>. If the former is set to
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<literal>true</literal>, sahara will
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start to write logs of <literal>INFO</literal> level and above. If
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<literal>debug</literal> is set to
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<literal>true</literal>, sahara will write all the logs, including
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the <literal>DEBUG</literal> ones.
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</para></step>
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</substeps>
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</step>
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<step><para>If you use the Data processing service with MySQL database,
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then for storing big job binaries in sahara internal database you must
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configure size of max allowed packet. Edit <filename>my.cnf</filename>
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file and change parameter:
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<programlisting language="ini">[mysqld]
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max_allowed_packet = 256M</programlisting>
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and restart MySQL server.
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</para></step>
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<step><para>Create database schema:
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<screen><prompt>#</prompt> <userinput>sahara-db-manage --config-file /etc/sahara/sahara.conf upgrade head</userinput></screen>
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</para></step>
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<step><para>You must register the Data processing service with the Identity
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service so that other OpenStack services can locate it. Register the
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service and specify the endpoint:
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<screen><prompt>$</prompt> <userinput>keystone service-create --name sahara --type data_processing \
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--description "Data processing service"</userinput>
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<prompt>$</prompt> <userinput>keystone endpoint-create \
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--service-id $(keystone service-list | awk '/ sahara / {print $2}') \
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--publicurl http://<replaceable>controller</replaceable>:8386/v1.1/%\(tenant_id\)s \
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--internalurl http://<replaceable>controller</replaceable>:8386/v1.1/%\(tenant_id\)s \
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--adminurl http://<replaceable>controller</replaceable>:8386/v1.1/%\(tenant_id\)s</userinput></screen>
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</para></step>
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<step><para>Start the sahara service:
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<screen os="rhel;centos;fedora;opensuse;ubuntu;debian"><prompt>#</prompt> <userinput>systemctl start openstack-sahara-all</userinput></screen>
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<screen os="sles"><prompt>#</prompt> <userinput>service openstack-sahara-all start</userinput></screen>
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</para></step>
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<step><para>(Optional) Enable the Data processing service to start on boot
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<screen os="rhel;centos;fedora;opensuse;ubuntu;debian"><prompt>#</prompt> <userinput>systemctl enable openstack-sahara-all</userinput></screen>
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<screen os="sles"><prompt>#</prompt> <userinput>chkconfig openstack-sahara-all on</userinput></screen>
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</para></step>
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</procedure>
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</section>
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26
doc/install-guide/section_sahara-verify.xml
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26
doc/install-guide/section_sahara-verify.xml
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<?xml version="1.0" encoding="UTF-8"?>
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<section xmlns="http://docbook.org/ns/docbook"
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xmlns:xi="http://www.w3.org/2001/XInclude"
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xmlns:xlink="http://www.w3.org/1999/xlink"
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version="5.0"
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xml:id="sahara-verify">
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<title>Verify the Data processing service installation</title>
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<para>To verify that the Data processing service (sahara) is installed and
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configured correctly, try requesting clusters list using sahara
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client.</para>
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<procedure>
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<step>
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<para>Source the <literal>demo</literal> tenant credentials:</para>
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<screen><prompt>$</prompt> <userinput>source demo-openrc.sh</userinput></screen>
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</step>
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<step>
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<para>Retrieve sahara clusters list:</para>
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<screen><prompt>$</prompt> <userinput>sahara cluster-list</userinput></screen>
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<para>You should see output similar to this:</para>
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<screen><computeroutput>+------+----+--------+------------+
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| name | id | status | node_count |
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+------+----+--------+------------+
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+------+----+--------+------------+</computeroutput></screen>
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</step>
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</procedure>
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</section>
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