What is new in Leap42.2 and SLE12SP2
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Transcript of What is new in Leap42.2 and SLE12SP2
Changes of DRBD in HAE
Nick WangHA [email protected]
Overview
What is HA Extension
What is DRBD
What is new in DRBD
The changes of DRBD in SLE12SP2/Leap42.2
HAE - High Availability Extension - (Geo cluster)
Example Cluster Scenario
Example Cluster Scenario
Benefits
Increased availability
Improved performance
Scalability
Disaster recovery
Data protection
Server consolidation
Storage consolidation
DRBD - distributed replicated block device
Superficial similarity to Raid 1
Distributed replicated block device
drbd.ko already built in kernel, but fall behind our dist Kernel 3.12 8.3.x Kernel 4.2 8.4.x Using 8.4.x in SLE12/SLE12-SP1 8.0 ~ 8.3 rather old versionUser-space tools: drbd-utils (drbdadm, drbdsetup, drbdmeta), drbdmanage
Normally used with HA stack(Cloud)
What DRBD(8.4) can help
A software-based, shared-nothing, replicated storage solution mirroring the content of block devices between hosts.It mirror data in real time, transparently, sync or asyncSupport only two nodes, using stacked mode to extentEnable dual-primary mode need file system support: ocfs2, gfsWide use for Cloud, HA and Disaster Recovery
DRBD9 in SLE12 SP2 Leap42.2
What DRBD9 offers
Extend to more than 2 nodes, one connection between two nodeAuto promotionDrbdmanage: drbd services on top of lvmPooled storage that scale easilyWork close with virtual environmentSSD performance optimizeRDMA APILower latency and higher IOPS
The changes in SP2
Features for DRBD in SLE12-SP2
DRBD9 compatible ver9.0.1Extend to more than 2 nodes (not many things to do if still using 2 nodes) If more than 2 nodes... Resize the disk, re-create-metadata, Change configurations, crm configure, etc...Resource agent osc:linbit:drbd only support drbd8.x.xYast2 drbd support Configuring multiple nodes, new syntax, etc...
Configure DRBD via yast2-drbd (SP1)
Configure DRBD via yast2-drbd (SP2)
Appendices
Links
HA install quick guide: http://docserv.nue.suse.com/documents/SLE-HA12-SP2/SLE-HA-install-quick/single-html/ HA admin guide: http://docserv.nue.suse.com/documents/SLE-HA12-SP2/SLE-HA-guide/single-html/
HA nfs quick guide: http://docserv.nue.suse.com/documents/SLE-HA12-SP2/SLE-HA-nfs-quick/single-html/
Accessible from outside: https://www.suse.com/documentation/sle-ha-12/index.html
Thank you.
