ODA Cannot SSH To ODA_BASE After Reboot (during Oakcli Patch 12.1.2.6.0 Infra Step)

Asset ID:	1-72-2145837.1
Update Date:	2018-05-18
Keywords:

Solution Type Problem Resolution Sure

Solution 2145837.1 : ODA Cannot SSH To ODA_BASE After Reboot (during Oakcli Patch 12.1.2.6.0 Infra Step)

Applies to:

Oracle Database Appliance X5-2 - Version All Versions to All Versions [Release All Releases]
Oracle Database Appliance Software - Version 12.1.2 to 12.1.2.6 [Release 12.1]
Information in this document applies to any platform.

Symptoms

When attempting to apply patch 22328442 which is a place holder for OAK patch bundle 12.1.2.6.0 to our ODA test server the following error occurs when trying to SSH to the ODA_Base.

ERROR
-----------------------
ssh: connect to host oda1 port 22: Connection refused

Due to this issue, users cannot access the server.

Changes

Applying the 12.1.2.6.0 patch bundle (infra)

Cause

The issue is in the fstab using nfs mount entry to backup server

When upgrading to OL6 (12.1.2.6.0) we upgrade the default nfs mount to version=4 although the backup server supports NFS V4 there was an issue during communication... the client was hanging there.

As a workaround if we booted into single user mode then disabled the nfs entries everything went back to normal

Solution

The solution is to put "nfsvers=3" in fstab on second node before doing the upgrade.

Update the /etc/fstab file the second node with an entry similar to the following:

nfs_nas_server:/vol/DATA/oradata /u02/oradata nfs\ rw,bg,hard,nointr,tcp,nfsvers=3,timeo=600,rsize=32768,wsize=32768,actimeo=0

References

<NOTE:1373599.1> - ODA Oracle Database Appliance Bare Metal Restore Procedure X5-2 and X6-2
<NOTE:2130463.1> - ODA: After ODA Infra Upgrade To 12.1.2.6.0 Cannot Establish SSH Connection when using LDAP
<NOTE:2129455.1> - ODAVP: xm console hangs on 12.1.2.6.0
<NOTE:1927656.1> - How to configure LDAP Client on Oracle Linux 6/RedHat Linux 6 using SSSD
<BUG:23262011> - ADD /ETC/FSTAB CHECK BEFORE UPGRADE.
<NOTE:884085.1> - Oracle VM: How to configure a guest Virtual Machine to boot from CDROM/DVDROM
<NOTE:2048836.1> - ODA (Oracle Database Appliance): Deployment without DNS fails at Step 16
<BUG:23038947> - VALIDATEOL6PRECHECKS TO CHECK CUSTOMIZED ENVIRONMENT AND REPORT IF ANY CRITICAL
<NOTE:888888.1> - Oracle Database Appliance - 18.1, 12.X, and 2.X Supported ODA Versions & Known Issues

Attachments

This solution has no attachment