patching in Multinode Non shared file system

[raja]

Hi Erman

What is the process of applying the patch in ADOP cycle for a multi node non shared file system in EBS 12.2. Do i need to run prepare,apply,finalize,cutover,cleanup in all the nodes for applying a patch in EBS 12.2

[ErmanArslansOracleBlog]

the adop commands that are used for applying patches in multinode configurations
are the same in single-node configurations, as adop deals with them transparently.

Application patches are applied in the same way they are applied in a single-mode configuration. The only
difference is that this time the application patches are applied to all the application nodes rather than a
single one.
In addition, there is no need to specify an extra parameter for adop to tell that environment is a
multinode environment, as adop detects the topology and uses SSH to connect to the other environment
and takes the patch actions in all the application nodes.

Read my book for further details : Practical Oracle E-Business Suite, Link :

https://www.amazon.com/Practical-Oracle-Business-Suite-Implementation/dp/1484214234

[Raja]

So, does that mean that in a multi node non shared apps tier,  I need to run adop phase prepare only in admin node and adop will take care of patching the rest nodes. Same for other adop phases? And before doing this ssh equivalence should be set among the nodes, right?

[ErmanArslansOracleBlog]

yes.

Reference 'Oracle':

 In a multi-node deployment, adop is only executed by the user on the master node: internally, adop will use ssh remote execution to run required actions on all secondary nodes automatically..

[baig]

Hi,

do i need to run the cutover phase only in primary node or both the nodes.

first execute in primary and after that parallely in the secondary node?

[baig]

I got the answer. please ignore my previous question.

1) i have setup password less ssh from primary to secondary.
do i need to have password less ssh from secondary to primary?


2) if yes do i need to do some changes at application level?

please update. Thanks in advance

[ErmanArslansOracleBlog]

To use SSH, adop requires the SSH equivalency from the admin node to all the application nodes in a multinode environment setup, because adop is not designed to supply a password while connecting the application nodes using SSH.
To set up the SSH equivalency (in other words, to configure the application OS user of the admin node to be able to connect all the other application nodes without needing to supply a password), you can use the ssh-keygen utility to create private and public key pairs.
You place the private key pairs into the admin node and the public key pairs into all the application nodes
in the configuration, thus letting the admin node connect all the application nodes using SSH without a password.