question What is the best process to do o.s updates on Name nodes and data nodes when our cluster built by using ec2 instances? in Archives of Support Questions (Read Only)

What is the best process to do o.s updates on Name nodes and data nodes when our cluster built by using ec2 instances?

prasad4u_com — Thu, 25 Feb 2016 22:38:29 GMT

We are using puppet, i would like to know the best process to do o.s updates on individual nodes? Can anyone suggest process?

aervits — Thu, 25 Feb 2016 22:41:29 GMT

take individual nodes into maintenance mode, stop services and run patch updates. @Ram D

prasad4u_com — Thu, 25 Feb 2016 23:09:30 GMT

Is it the same for name nodes also? IS there any special care has to be taken? Can you provide the hortonworks documentation link for patch updates?

prasad4u_com — Thu, 25 Feb 2016 23:18:35 GMT

I am asking about o.s level updates on machine not service level patches.

aervits — Thu, 25 Feb 2016 23:32:53 GMT

you have seen this before. https://community.hortonworks.com/questions/4940/hdp-os-upgradepatching-best-practices.html. Same with namenodes, make sure you have HA. when you failover everything to standby node, take services down on the active (now standby) namenode and patch it.

nsabharwal — Fri, 26 Feb 2016 01:08:07 GMT

nsabharwal — Fri, 26 Feb 2016 01:14:54 GMT

@Ram D It's no different in EC2..See this old thread started by you

ashneesharma88 — Tue, 01 Mar 2016 01:56:13 GMT

Steps to update OS patches.

1) Stop all application on cluster

2) Apply the OS patches.

3) Reboot the system if required.

4) start all application on cluster

5) Validate all services.