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22 configuration
1.
Configuration 7/6/2012 ©
2012 MapR Technologies Configuration 1
2.
Configuration
Agenda • Setting up the Node Topology • Setting up Volumes • Central Configuration • Setting up Multiple NICs • Setting up VIPs for NFS • Managing Users • LAB: Configuration © 2012 MapR Technologies Configuration 2
3.
Configuration
Objectives At the end of this module you will be able to: • Configure node and volume topology • Explain how Central Configuration manages the centralized repository of MapR configuration files • Set up or restrict NICs for use with MapR • Configure VIPs for NFS HA • Manage permissions for users and groups on the cluster as well as on volumes and the MapR-FS • Set quotas for volumes, users, and groups © 2012 MapR Technologies Configuration 3
4.
Setting up the
Node Topology © 2012 MapR Technologies Configuration 4
5.
Node Topology
Topology indicates locations of nodes and racks – Determines where MapR places replicated data – Replication scattered across racks • Data still available if a rack fails Offline Active – Specify a topology for each node row22 • Group nodes by rack/switch depending on – How physical cluster is arranged – How you want to place replicated data Rack5 Rack 6 © 2012 MapR Technologies Configuration 5
6.
Node Topology © 2012
MapR Technologies Configuration 6
7.
Setting up Volumes ©
2012 MapR Technologies Configuration 7
8.
Setting up Volumes
Volume: – A logical unit of storage that allows you to apply policies to • Files • Directories • Sub-volumes Use volumes to / /projects /users – Enforce disk usage limits – Set replication levels – Establish ownership and accountability – Measure costs Create a separate volume for each user/department/project Mount volumes under other volumes as needed © 2012 MapR Technologies Configuration 8
9.
Typical Volume Layout
/ /binaries /hbase /projects /users /var/mapr /build /test /mjones /jsmith local... Recommendation: set up a volume per user © 2012 MapR Technologies Configuration 9
10.
Volume Topology
Place a volume on specific racks or node(s) – Set volume topology to node/nodes/rack Note: – By default, new volumes are created with a topology of / – Change the default topology, with the config save command • Set the cldb.default.volume.topology parameter • For example: maprcli config save -values "{"cldb.default.volume.topology":"/default-rack"}” • After running the above command, new volumes have the default topology is /default-rack © 2012 MapR Technologies Configuration 10
11.
Volume Topology © 2012
MapR Technologies Configuration 11
12.
Central Configuration © 2012
MapR Technologies Configuration 12
13.
Central Configuration
Central location for all MapR config files – No need to SSH to individual nodes • Uses MapR-FS – Built-in replication – Use snapshots for versioning – Details • maprfs:///var/mapr/configuration • Config options in warden.conf – centralconfig.enabled=true – pollcentralconfig.interval.seconds=300 © 2012 MapR Technologies Configuration 13
14.
Central Configuration
How does it work? – Warden copies files from maprfs:///var/mapr/configuration to local node /opt/mapr/… Examples From: maprfs:///var/mapr/configuration/default/hadoop/hadoop-0.20.2/conf To: /opt/mapr/hadoop/hadoop-0.20.2/conf From: maprfs:///var/mapr/configuration/nodes/hostname/hadoop/hadoop-0.20.2/conf To: /opt/mapr/hadoop/hadoop-0.20.2/conf © 2012 MapR Technologies Configuration 14
15.
Setting up Multiple
NICs © 2012 MapR Technologies Configuration 15
16.
Configuring NICs with
MapR Configure which NICs are used for MapR traffic – Faster NICs for high-bandwidth data transfer – Slower NIC for ssh, etc. Set MAPR_SUBNETS – Comma-separated list of up to four subnets – CIDR notation with no spaces – For example export MAPR_SUBNETS=1.2.3.4/12,1.2.5.6/24 – If MAPR_SUBNETS is not set, MapR uses all NICs present on the node © 2012 MapR Technologies Configuration 16
17.
Setting up VIPs
for NFS © 2012 MapR Technologies Configuration 17
18.
VIPs for NFS
HA Use Virtual IP addresses (VIPs) to achieve HA with NFS – If one node fails VIP moves to next node in pool – Recommendation: NFS nodes >= 3 – First set up one or more VIP(s) • Node are added to the pool by starting NFS service – If all NICs are on the same subnet • Manually add IP/MAC to pool – Use maprcli virtualip add or MCS – If not all NICs on NFS nodes in same subnet – OR if you wish to restrict VIPs assignments to specific NICs or MAC addresses © 2012 MapR Technologies Configuration 18
19.
VIPs for NFS
HA © 2012 MapR Technologies Configuration 19
20.
Managing Users © 2012
MapR Technologies Configuration 20
21.
Managing Users
MapR uses OS/PAM to authenticate users – Assign a specific user (e.g. “mapr”) to administer the cluster – UIDs and GIDs should match on all nodes – Assign permissions to users/groups via MCS or use acl edit or acl set • Cluster (ACL) • Volume (ACL) • MapR-FS (POSIX-like) – Assign quotas on volumes • Limit space used by a volume • limit space used on all volumes by a user/group © 2012 MapR Technologies Configuration 21
22.
Cluster Permissions
Code Allowed Action Includes login Log in to the MapR Control cv System, use the API and command-line interface, read access on cluster and volumes ss Start/stop services cv Create volumes a Admin access All permissions except fc fc Full control (administrative a access and permission to change the cluster ACL) © 2012 MapR Technologies Configuration 22
23.
Volume Permissions
Code Allowed Action dump Dump the volume restore Mirror or restore the volume m Modify volume properties, create and delete snapshots d Delete a volume fc Full control (admin access and permission to change volume ACL) © 2012 MapR Technologies Configuration 23
24.
LAB:
Configuration © 2012 MapR Technologies Configuration 24
25.
Questions © 2012 MapR
Technologies Configuration 25