Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Manuale Utente

Red Hat Cluster SuiteHP User Society / DECUS17. Mai 2006Joachim SchröderRed Hat GmbH

Handling FailuresSoftware Failures●Monitoring provided by resource agents handles restarting●If a resource fails and is correctly restarted, no other

After a node failure...Node 0 Node 1ClientsNetwork Power SwitchSANOracleNFSbindHeartbeat

Data SharingPurpose: parallel access to data resources●Files and Directories●Needed identical or single dataData Sharing technologies●SAN – block ba

Red Hat Global File System v6.1New version for Red Hat Enterprise Linux v.4●Uses new common cluster infrastructure in Red Hat Cluster Suite (included

Distributed Lock ManagerRed Hat Cluster Suite v.4 includes a Distributed Lock Manager (DLM)●Primarily used by Red Hat Global File System●Available fo

Cluster Logical Volume Manager (CLVM)CLVM builds upon LVM 2.0 and the kernel device mapper component included in 2.5 and 2.6 Linux distributionsEsse

Topology:- 2 or mode nodes- NIC card- NO shared storageApplications:- Read-only data- Small web serving- NFS/FTP serving- Edge of networkData model:-

Use Case: Shared file datastore, NASRed Hat Enterprise Linux (NFS)Uses an external NFS file serverNetApp, etc.Shared storage – file based (NFS)Clus

Two Key Industry TrendsClustering (scale-out) is happening●20% of all servers shipped will be clustered by 2006. - Gartner●Linux clusters are growing

Use Case: Shared block datastore, SANRed Hat Enterprise Linux (ext3, integrated HBA drivers)Offers higher, SAN-based, performanceShared storage – b

Use Case: Concurrent file system accessRed Hat Enterprise Linux + Red Hat Global File System●Includes Red Hat Cluster SuiteShared file system access

About Piranha & IPVSPiranha●Front-end to IPVS (or LVS) which enables IPVS director failover●Provides a web-based configuration GUIIPVS – does t

Piranha ArchitectureAppears as one mega-machine to clients: SSI at the IP levelOne or two nodes acting as IPVS directors●Stand-alone cluster: Not de

Piranha ArchitecturePrimary BackupRS0 RS1 RS2InternetHeartbeatVirtual IPDirectorReal Server

Piranha – Real Server FailurePrimary BackupRS0 RS1 RS2InternetHeartbeatVirtual IPDirectorReal Server

Piranha – Director FailurePrimary BackupRS0 RS1 RS2InternetVirtual IPHeartbeatDirectorReal Server

Red Hat and GFS Joint Linux Clustering SolutionHP Serviceguard for Linux creates a cluster of Linux servers that make application services available

Questions?

Vielen Dank!Joachim Schröder, Solution [email protected]

What if you could...

Clustering - motivationReduce TCO by:●Consolidate services to fewer systems●Simplify management tasks●Increase service uptimeApproaches:●Scale-up: f

Clustering – “ buzzwords” Application Failover ●Detect service failures and failover to standby systemsLoad Balancing●Distribute service load over

Red Hat Clustering ArchitectureRed Hat Cluster Suite provides●Application failover●Improves application availability●Included with GFS●Core services

Red Hat Cluster Suite: Core Cluster ServicesCore functionality for both Clustering and GFS is delivered in Red Hat Cluster Suite●Membership managemen

Red Hat Cluster Suite OverviewProvides two major technologies●High Availability failover – suitable for unmodified applications●IP Load Balancing –

Red Hat Cluster Manager ArchitectureNode 0 Node 1ClientsNetwork Power SwitchSANOracle NFSbindHeartbeat