1

I am having a cluster like below -

  1. 3 Hbase Master (1 Active & 2 standby)
  2. 4 Region Servers
  3. 4 Data Nodes
  4. 1 Primary & 1 Secondary Name Node
  5. 3 Journal Node
  6. 4 Nodemanager
  7. 3 Resource Manager (1 Active & 2 standby)

Query 1

What should be the order of stopping, upgrading & starting of components if I am manually upgrading the package via "1 Click" package as mentioned here? Is it like below:-

  1. Stop, Upgrade & Start all data nodes one by one.
  2. Stop, Upgrade & Start region servers one by one
  3. Stop, Upgrade & Start Upgrade HBase standby nodes one by one
  4. Stop, Upgrade & Start Secondary Name Node
  5. Upgrade Primary Name Node
  6. Upgrade Journal Nodes
  7. Upgrade HBase Master
  8. Stop, Upgrade & Start standby Resource Manager one by one
  9. Stop, Upgrade & Start Active Resource Manager
  10. Stop, Upgrade & Start Nodemanagers one by one.

Query 2

If I don't follow any order and update the services in the nodes in parallel, will I face any issue (as this is just a minor version upgrade)?

Query 3

If I am taking the entire cluster down by stopping all the services in all the nodes and upgrading and then starting? What order should I follow while starting the services?

tuk
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