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20a installation
1.
Installation 7/6/2012 ©
2012 MapR Technologies Installation 1
2.
Installation
Agenda • Installation Overview • Installation Methods • Installation Details • High Availability Considerations • LAB: Installation © 2012 MapR Technologies Installation 2
3.
Installation
Objectives At the end of this module you will be able to: • Describe the steps involved in MapR installation • Install a cluster using the maprinstall script • Install MapR on a single node manually and with the maprinstall script • Install MapR Metrics • Explain what is involved in setting up HA for MapR © 2012 MapR Technologies Installation 3
4.
Installation Overview © 2012
MapR Technologies Installation 4
5.
Installation Overview
What needs to happen to install MapR on each node ? – Add MapR repository – Install MapR services and packages from repository – Configure the node (configure.sh) – Format disks (disksetup) – Install and configure MapR Metrics (optional) – Start the cluster – Additional configuration steps after install • Set up HA • Set up node topology (covered in Configuration module) © 2012 MapR Technologies Installation 5
6.
Installation Methods © 2012
MapR Technologies Installation 6
7.
Installation Methods
Cluster installation – Bring up an entire cluster with a script from one node • Download the maprinstall script and move to /opt/install-mapr • Run/opt/install-mapr/maprinstall –R <roles_file> – Performs node validation (OS partition, ports, memory, swap space, etc.) – Assumes ability to SSH from node running script to other nodes – Provide a roles file with comma-delimited lists of: » Nodes » Packages » Disks 10.10.100.2 mapr-fileserver,mapr-tasktracker /dev/sdb 10.10.100.3 mapr-fileserver,mapr-tasktracker /dev/sdb 10.10.100.1 mapr-cldb,mapr-zookeeper,mapr-jobtracker,mapr- webserver,mapr-fileserver,mapr-tasktracker /dev/sdb © 2012 MapR Technologies Installation 7
8.
Installation Methods
Individual node installation – Scripted • Download the maprinstall script and move to /opt/install-mapr • Run/opt/install-mapr/maprinstall – Assumes you can provide mandatory data (package list, CLDB, Zookeeper) – Performs node validation (OS partition, ports, memory, swap space, etc.) – Executes all steps below from one script – Manual • Add MapR repository • Install MapR services (apt-get, yum, etc.) • configure.sh • disksetup • Bring up the cluster © 2012 MapR Technologies Installation 8
9.
Installation Details © 2012
MapR Technologies Installation 9
10.
MapR Repository
From MapR repositories – apt-get or yum From local repositories – Download .tar.gz – Set up repository – apt-get or yum From local packages – Use dpkg or rpm – Must resolve dependencies manually © 2012 MapR Technologies Installation 10
11.
Configuration Script
configure.sh – Run on each node – Sets up mapr-clusters.conf – Writes ZK node IPs several places (mapr-cldb.conf is one) – Registers node with ZooKeeper and CLDB © 2012 MapR Technologies Installation 11
12.
Choosing Disks for
MapR MapR formats and uses disks for MapR-FS – Should use physical drives/partitions Disk ready for MapR? – mount: partition in use? – df: partition in use? – Entry in /etc/fstab? – Not accessible to mkfs? mkfs fails? If any above are true, disk is not ready © 2012 MapR Technologies Installation 12
13.
Disk Setup Script
disksetup – Takes input from a text file listing usable disks. E.g. /dev/sdb /dev/sdc1 /dev/sdc2 /dev/sdc4 /dev/sdd – Adds disks to disktab – Use –F option to force formatting – Creates storage pools (-w option specifies stripe width) – Run after configure.sh © 2012 MapR Technologies Installation 13
14.
Installing MapR Metrics
Prerequisites – MySQL server (on a node or separate machine) – EPEL repository – M5 license for all features (M3: no charts or histograms) Installation procedure: – Install MapR Metrics package on all JobTracker and Webserver nodes • e.g. apt-get install mapr-metrics – MCS: System Settings > Metrics • Enter <hostname/IP>:<port> of MySQL server • Enter MySQL credentials – Source /opt/mapr/bin/setup.sql at mysql> prompt on a node where MapR Metrics is installed © 2012 MapR Technologies Installation 14
15.
Starting the Cluster
Bring up ZooKeeper on ZooKeeper nodes Bring up Warden – Wait for services to start (use jps to see) Set up administrative user Log onto MapR Control System Add license © 2012 MapR Technologies Installation 15
16.
High Availability
Considerations © 2012 MapR Technologies Installation 16
17.
High Availability (HA)
CLDB JobTracker NFS © 2012 MapR Technologies Installation 17
18.
High Availability CLDB
Warm standby – One Primary CLDB active at a time – Secondary CLDB supports reads Configure multiple CLDBs – Up to 6 Install across physical topology Can isolate from all other services Can also isolate CLDB volume on its own topology Don’t run active JobTracker on primary CLDB node © 2012 MapR Technologies Installation 18
19.
High Availability JobTracker
Cold standby – One active JobTracker at a time – Stateful failover preserves running jobs In most cases 3 – Unless > 100 nodes, then 5 © 2012 MapR Technologies Installation 19
20.
High Availability NFS
Active standby – Multiple concurrent NFS servers allowed – VIPs provide immediate failover – Failover triggered by CLDB if NFS server fails – Reads/writes continue after failover © 2012 MapR Technologies Installation 20
21.
Setting Up NFS
HA Install and run mapr-nfs service on assigned nodes Create a pool of VIPs Use MapR Control System or the API to assign VIPs to NFS nodes – One VIP across multiple NFS nodes – Multiple VIPs across multiple NFS nodes © 2012 MapR Technologies Installation 21
22.
LAB: Installation © 2012
MapR Technologies Installation 22
23.
Questions © 2012 MapR
Technologies Installation 23