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

[#1]

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

[#2 · Accepted solution]

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

[#3]

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?

[#4]

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

[#5]

@Ram D

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.

[#6]

@Ram D

See this https://community.hortonworks.com/questions/4940/hdp-os-upgradepatching-best-practices.html

[#7]

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

https://community.hortonworks.com/questions/15328/os-patch-updates-what-are-the-precautions-to-take....

[#8]

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.