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cluvfy Pre Check for RAC Oracle Installation (CVU)


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runcluvfy.sh stage -pre crsinst -n node1,node2 -fixup -verbose

Cluster Verification Pre Installation check failed.

Verifying Physical Memory ...FAILED (PRVF-7530)

$./runcluvfy.sh stage -pre crsinst -n node1,node2 -fixup -verbose
Verifying Physical Memory ...
Node Name     Available                 Required                  Status
  ------------  ------------------------  ------------------------  ----------
  node2         7.5443GB (7910784.0KB)    8GB (8388608.0KB)         failed
  node1         7.5443GB (7910784.0KB)    8GB (8388608.0KB)         failed
Verifying Physical Memory ...FAILED (PRVF-7530)
Reason:  Recommended RAM requirement per Node is 8GB to install Oracle12c R2 clusterware. If you have less memory you will see this warning.
Solution:- Minimum 4GB RAM you need run the installation successfully. If you have 4GM you can safely ignore this error and proceed.
Verifying Group Existence: asmadmin ...FAILED (PRVG-10461)
Verifying Group Existence: asmadmin ...
  Node Name     Status                    Comment
  ------------  ------------------------  ------------------------
  node2         failed                    does not exist
  node1         failed                    does not exist
Verifying Group Existence: asmadmin ...FAILED (PRVG-10461)
Verifying Group Existence: asmdba ...
  Node Name     Status                    Comment
  ------------  ------------------------  ------------------------
  node2         failed                    does not exist
  node1         failed                    does not exist
Verifying Group Existence: asmdba ...FAILED (PRVG-10461)
Verifying Group Membership: asmadmin ...
  Node Name         User Exists   Group Exists  User in Group  Status
  ----------------  ------------  ------------  ------------  ----------------
  node2             yes           no            no            failed
  node1             yes           no            no            failed
Verifying Group Membership: asmadmin ...FAILED (PRVG-10460)

Verifying Group Membership: asmdba ...FAILED (PRVG-10460)

Verifying Group Membership: asmdba ...
  Node Name         User Exists   Group Exists  User in Group  Status
  ----------------  ------------  ------------  ------------  ----------------
  node2             yes           no            no            failed
  node1             yes           no            no            failed
Verifying Group Membership: asmdba ...FAILED (PRVG-10460)
Reason: due to the security reasons and separation of duties there are various group required. Oracle recommends to create and use these groups.
For more information you can check oracle clusterware installation guide.
Solution:- I am using orainst as primary and dba as secondary group. As long as you are not intended to use other groups you can safely ignore these warnings and proceed

Verifying Node Connectivity ...FAILED (PRVG-1172, PRVG-11067, PRVG-11095)

Verifying Node Connectivity ...FAILED (PRVG-1172, PRVG-11067, PRVG-11095)
Reason:- Some interface on your server is not configured properly as expected by Oracle clusterware.
Solution:- Investigate and fix the problem if this is the interface (private/public) participating in your clusterware installation.

Verifying Multicast check ...FAILED (PRVG-11138)

Verifying Multicast check ...
Checking subnet "192.9.1.0" for multicast communication with multicast group "224.0.0.251"
Checking subnet "10.0.0.0" for multicast communication with multicast group "224.0.0.251"
Checking subnet "192.168.122.0" for multicast communication with multicast group "224.0.0.251"
Verifying Multicast check ...FAILED (PRVG-11138)
Reason:- firewall or  iptables or running. you can verify the same by running
 #systemctl status firewalld
 #systemctl status iptables.service
Solution: disable firewall and/or iptables
 #systemctl stop firewalld
 #systemctl disable firewalld
 #systemctl stop iptables.service
 #systemctl disable iptables.service

Verifying NTP daemon is synchronized with at least one external time source ...FAILED (PRVG-13602)

Verifying Network Time Protocol (NTP) ...FAILED (PRVG-1063)

Verifying NTP daemon is synchronized with at least one external time source ...FAILED (PRVG-13602)
Verifying Network Time Protocol (NTP) ...FAILED (PRVG-1063)
Reason:- You are willing to use NTP but ntp server is not configured to synchronize the time from external source
Solution: Either disable NTP and let the CTSS take care of time synchronization
or
Configure NTP server accordingly

Verifying Daemon "avahi-daemon" not configured and running ...FAILED (PRVG-1360)

Verifying Daemon "avahi-daemon" not configured and running ...
  Node Name     Configured                Status
  ------------  ------------------------  ------------------------
  node2         no                        passed
  node1         no                        passed
  Node Name     Running?                  Status
  ------------  ------------------------  ------------------------
  node2         yes                       failed
  node1         yes                       failed

 Verifying Daemon "avahi-daemon" not configured and running ...FAILED (PRVG-1360)
Reason:Daemon "avahi-daemon" not configured and running
Solution :-
Stop avahi-daemon damon if it not configured
systemctl status avahi-daemon
systemctl stop avahi-daemon
systemctl disable avahi-daemon

Verifying zeroconf check ...FAILED (PRVE-10077)

Verifying zeroconf check ...FAILED (PRVE-10077)
Reason: NOZEROCONF parameter is not configured
Solution
enter following in /etc/sysconfig/network
NOZEROCONF=yes

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