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SLE12 SP2 : High Availability et Geo Cluster
1. High Availability + GEO
SLE12 SP2
Antoine Giniès
Project Manager / Release Manager
SUSE / aginies@suse.com
Expert Days Paris
Feb 2017
2. 2
SUSE Entreprise Server
HA SLE12 SP2
Main Features
• Policy Driven Cluster
• Cluster Aware FS
• Continuous Data Replication
• Setup and Installation bootstrap
• Simple
6. 6
STONITH / FENCING
Shoot The Other Node In The Head
• UPS (Uninterruptible Power Supply)
• PDU (Power Distribution Unit)
• Blade Power Control
• Light-out devices (iLo, Darc etc...)
• SBD Devices (>1)
• Crm configure ra list/info stonith:XXX
7. 7
HAWK2 (new)
High Availability Web Konsole
• Status
• Dashboard
• History
• Resources
• Constraint
• Wizard ( resources,
• Configuration ( constraints, cluster etc...)
• Logs ( debug )
• Access Control (Target = users / Role = access to CIB)
• Batch mode ( staging / simulate )
8. 8
GEO Concept
• Ticket ~= service
• Boothd ~= manage ticket
• Arbitrator ~= take decision
• Dead Man Dep ~= Fence?
10. 10
Maintenance / Standby
How to Update
• Standby
– still a R
– Elligible as a R
• Maintenance
– Un-managed
– No more a R
– monitor
11. 11
Cluster-MD (new)
Cluster Multi-device
• Software based raid storage
• Improve performance compare to CLVM mirroring
• RAID1 (redundancy)
• Replace at Runtime
• Requires: corosync / DLM
• On top of 2 SAN storage → no more SPOF
13. 13
DRBD VS Cluster-MD
• DRBD
– SAN storage
– 2 nodes only
– Possible Regular FS
– Primary / Primary with cluster aware FS
• Cluster-MD
– Classical or SAN storage
– > 2 nodes
– Cluster Aware FS
14. 14
OCFS2 VS GFS2
• OCFS2
– Fast: small/large data files on different nodes
– No quota support
– No online-resize (no mounted)
• GFS2
– Fast: Large data files
– Perf issue accessing small files on different nodes
– Quota support
– Online-resize (mounted)
15. 15
Testing HA easily
Get everything on github
• HA cluster testing using VM
• Fully automatic
• Testing scenarios
• https://github.com/krig/Deploy_HA_SLE_cluster