openstack/deb-sahara
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[DOC] update overview doc

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Change-Id: Ib38d3928bf6aec01911e5bfb2c9c9a570f3b8ec8
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Michael Ionkin 2016-09-15 14:51:24 +03:00
parent 2371ba4a85
commit 72d03963f9
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doc/source/overview.rst
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@ -63,6 +63,8 @@ The sahara product communicates with the following OpenStack services:
instances.
* Networking (neutron) - provides networking services to data processing
clusters.
* DNS service (designate) - provides ability to communicate with cluster
instances and Hadoop services by their hostnames.
* Telemetry (ceilometer) - used to collect measures of cluster usage for
metering and monitoring purposes.
* Shared file systems (manila) - can be used for storage of framework job
@ -87,7 +89,7 @@ For fast cluster provisioning a generic workflow will be as following:
* for base images without a pre-installed framework, sahara will support
pluggable deployment engines that integrate with vendor tooling.
* you can download prepared up-to-date images from
http://sahara-files.mirantis.com/images/upstream/liberty/
http://sahara-files.mirantis.com/images/upstream/
* define cluster configuration, including cluster size, topology, and
framework parameters (for example, heap size):
@ -148,13 +150,8 @@ deployment. Users may choose one of the pre-configured Cluster Templates to
start a Cluster. To get access to VMs after a Cluster has started, the user
should specify a keypair.
Sahara provides several constraints on cluster framework topology. JobTracker
and NameNode processes could be run either on a single VM or two separate
VMs. Also a cluster could contain worker nodes of different types. Worker
nodes could run both TaskTracker and DataNode, or either of these processes
alone. Sahara allows a user to create a cluster with any combination of these
options, but it will not allow the creation of a non-working topology (for
example: a set of workers with DataNodes, but without a NameNode).
Sahara provides several constraints on cluster framework topology. You can see
all constraints in the documentation for the appropriate plugin.
Each Cluster belongs to an Identity service project determined by the user.
Users have access only to objects located in projects they have access to.