Recreate GNS 12.2

Overview

  • Duing a 12.2 Domain Service Cluster installation I’ve filled in the wrong GNS Subdomain name
  • This means nlslookup for my SCAN address doesn’t work
  • Final cluvfy comamnds reports error : PRVF-5218 : Domain name “dsctw21-vip.dsctw2.example.com” did not resolve to an IP address.

-> So this was a good exercise to verify whetjer my older 12.1 article to recreate GNS  also works witht 12.2 !

Backup your RAC profile and local OCR

As of 12.x/11.2 Grid Infrastructure, the private network configuration is not only stored in OCR but also in the gpnp profile -  please take a backup of profile.xml on all cluster nodes before proceeding, as grid user:
[grid@dsctw21 peer]$ cd  $GRID_HOME/gpnp/dsctw21/profiles/peer/
[grid@dsctw21 peer]$ cp  profile.xml profile.xml_backup_5-Mai-2017
[root@dsctw21 ~]# export GRID_HOME=/u01/app/122/grid
[root@dsctw21 ~]# $GRID_HOME/bin/ocrconfig -local -manualbackup
dsctw21     2017/05/05 17:12:50     /u01/app/122/grid/cdata/dsctw21/backup_20170505_171250.olr     0     
dsctw21     2017/05/05 15:07:41     /u01/app/122/grid/cdata/dsctw21/backup_20170505_150741.olr     0  

[grid@dsctw21 peer]$ $GRID_HOME/bin/ocrconfig -local -showbackup
dsctw21     2017/05/05 17:12:50     /u01/app/122/grid/cdata/dsctw21/backup_20170505_171250.olr     0     
dsctw21     2017/05/05 15:07:41     /u01/app/122/grid/cdata/dsctw21/backup_20170505_150741.olr     0 
-> Repeat these steps on all of your RAC nodes

Collect Vip Addresses, Device Names, GNS Deails

[root@dsctw21 ~]# $GRID_HOME/bin/oifcfg getif
enp0s8  192.168.5.0  global  public
enp0s9  192.168.2.0  global  cluster_interconnect,asm

Get the current GNS VIP IP:
[root@dsctw21 ~]# $GRID_HOME/bin/crsctl status resource ora.gns.vip -f | grep USR_ORA_VIP
GEN_USR_ORA_VIP=
USR_ORA_VIP=192.168.5.60

[root@dsctw21 ~]# ifconfig enp0s8
enp0s8: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.5.151  netmask 255.255.255.0  broadcast 192.168.5.255

[root@dsctw21 ~]#  ifconfig enp0s9
enp0s9: flags=4163<UP,BROADCAST,RUNNING,MULTICAST>  mtu 1500
        inet 192.168.2.151  netmask 255.255.255.0  broadcast 192.168.2.255

[root@dsctw21 ~]#  $GRID_HOME/bin/srvctl config gns -a -l
GNS is enabled.
GNS is listening for DNS server requests on port 53
GNS is using port 5353 to connect to mDNS
GNS status: Self-check failed.
Domain served by GNS: example.com
GNS version: 12.2.0.1.0
Globally unique identifier of the cluster where GNS is running: 3a9c87760b7bdf65ffea8852e7dfdae5
Name of the cluster where GNS is running: dsctw2
Cluster type: server.
GNS log level: 1.
GNS listening addresses: tcp://192.168.5.60:44456.
GNS instance role: primary
GNS is individually enabled on nodes: 
GNS is individually disabled on nodes: 

[root@dsctw21 ~]# $GRID_HOME/bin/srvctl config gns
GNS is enabled.
GNS VIP addresses: 192.168.5.60
Domain served by GNS: example.com

This should be a subdomain as example.com is our DNS domain !

Stop resources and recreate  gns, nodeapps

[root@dsctw21 ~]# $GRID_HOME/bin/srvctl stop scan_listener 
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl stop scan
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl stop nodeapps -f
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl stop gns
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl remove nodeapps
Please confirm that you intend to remove node-level applications on all nodes of the cluster (y/[n]) y
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl remove gns
Remove GNS? (y/[n]) y
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl add gns -i 192.168.5.60 -d dsctw2.example.com
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl config gns
GNS is enabled.
GNS VIP addresses: 192.168.5.60
Domain served by GNS: dsctw2.example.com
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl config gns -list
CLSNS-00005: operation timed out
  CLSNS-00041: failure to contact name servers 192.168.5.60:53
    CLSGN-00070: Service location failed.
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl start gns
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl config gns -list
dsctw2.example.com DLV 50343 10 18 ( zfiaA8U30oiGSATInCdyN7pIKf1ZIVQhHsF6OQti9bvXw7dUhNmDv/txClkHX6BjkLTBbPyWGdRjEMf+uUqYHA== ) Unique Flags: 0x314
dsctw2.example.com DNSKEY 7 3 10 ( MIIBCgKCAQEAmxQnG2xkpQMXGRXD2tBTZkUKYUsV+Sj/w6YmpFdpMQVoNVSXJCWgCDqIjLrfVA2AQUeEaAek6pfOlMp6Tev2nPVvNqPpul5Fs63cFVzwjdTI4zU6lSC6+2UVJnAN6BTEmrOzKKt/kuxoNNI7V4DZ5Nj6UoUJ2MXGr/+RSU44GboHnrftvFaVN8pp0TOoOBTj5hHH8C73I+lFfDNhMXEY8WQhb1nP6Cv02qPMsbb8edq1Dy8lt6N6kzjh+9hKPNdqM7HB3OVV5L18E5HtLjWOhMZLqJ7oDTDsQcMMuYmfFjbi3JvGQrdTlGHAv9f4W/vRL/KV8bDkDFnSRSFubxsbdQIDAQAB ) Unique Flags: 0x314
dsctw2.example.com NSEC3PARAM 10 0 2 ( jvm6kO+qyv65ztXFy53Dkw== ) Unique Flags: 0x314
Oracle-GNS A 192.168.5.60 Unique Flags: 0x315
dsctw2.Oracle-GNS SRV Target: Oracle-GNS Protocol: tcp Port: 59102 Weight: 0 Priority: 0 Flags: 0x315
dsctw2.Oracle-GNS TXT CLUSTER_NAME="dsctw2", CLUSTER_GUID="3a9c87760b7bdf65ffea8852e7dfdae5", NODE_NAME="dsctw22", SERVER_STATE="RUNNING", VERSION="12.2.0.0.0", PROTOCOL_VERSION="0xc200000", DOMAIN="dsctw2.example.com" Flags: 0x315
Oracle-GNS-ZM A 192.168.5.60 Unique Flags: 0x315
dsctw2.Oracle-GNS-ZM SRV Target: Oracle-GNS-ZM Protocol: tcp Port: 34148 Weight: 0 Priority: 0 Flags: 0x315
--> No VIP IPs  !

Recreate Nodeapps

[root@dsctw21 ~]#  $GRID_HOME/bin/srvctl add nodeapps -S 192.168.5.0/255.255.255.0/enp0s8
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl start nodeapps
PRKO-2422 : ONS is already started on node(s): dsctw21,dsctw22
[root@dsctw21 ~]# $GRID_HOME/bin/srvctl config gns -list
dsctw2.example.com DLV 50343 10 18 ( zfiaA8U30oiGSATInCdyN7pIKf1ZIVQhHsF6OQti9bvXw7dUhNmDv/txClkHX6BjkLTBbPyWGdRjEMf+uUqYHA== ) Unique Flags: 0x314
dsctw2.example.com DNSKEY 7 3 10 ( MIIBCgKCAQEAmxQnG2xkpQMXGRXD2tBTZkUKYUsV+Sj/w6YmpFdpMQVoNVSXJCWgCDqIjLrfVA2AQUeEaAek6pfOlMp6Tev2nPVvNqPpul5Fs63cFVzwjdTI4zU6lSC6+2UVJnAN6BTEmrOzKKt/kuxoNNI7V4DZ5Nj6UoUJ2MXGr/+RSU44GboHnrftvFaVN8pp0TOoOBTj5hHH8C73I+lFfDNhMXEY8WQhb1nP6Cv02qPMsbb8edq1Dy8lt6N6kzjh+9hKPNdqM7HB3OVV5L18E5HtLjWOhMZLqJ7oDTDsQcMMuYmfFjbi3JvGQrdTlGHAv9f4W/vRL/KV8bDkDFnSRSFubxsbdQIDAQAB ) Unique Flags: 0x314
dsctw2.example.com NSEC3PARAM 10 0 2 ( jvm6kO+qyv65ztXFy53Dkw== ) Unique Flags: 0x314
dsctw2-scan.dsctw2 A 192.168.5.231 Unique Flags: 0x1
dsctw2-scan1-vip.dsctw2 A 192.168.5.231 Unique Flags: 0x1
dsctw21-vip.dsctw2 A 192.168.5.233 Unique Flags: 0x1
dsctw22-vip.dsctw2 A 192.168.5.237 Unique Flags: 0x1
dsctw2-scan A 192.168.5.231 Unique Flags: 0x1
dsctw2-scan1-vip A 192.168.5.231 Unique Flags: 0x1
dsctw21-vip A 192.168.5.233 Unique Flags: 0x1
dsctw22-vip A 192.168.5.237 Unique Flags: 0x1
Oracle-GNS A 192.168.5.60 Unique Flags: 0x315
dsctw2.Oracle-GNS SRV Target: Oracle-GNS Protocol: tcp Port: 59102 Weight: 0 Priority: 0 Flags: 0x315
dsctw2.Oracle-GNS TXT CLUSTER_NAME="dsctw2", CLUSTER_GUID="3a9c87760b7bdf65ffea8852e7dfdae5", NODE_NAME="dsctw22", SERVER_STATE="RUNNING", VERSION="12.2.0.0.0", PROTOCOL_VERSION="0xc200000", DOMAIN="dsctw2.example.com" Flags: 0x315
Oracle-GNS-ZM A 192.168.5.60 Unique Flags: 0x315
dsctw2.Oracle-GNS-ZM SRV Target: Oracle-GNS-ZM Protocol: tcp Port: 34148 Weight: 0 Priority: 0 Flags: 0x315
--> GNS knows VIP IPs - Related cluster resources VIPs, GNS and SCAN Listener should be  ONLINE 
*****  Cluster Resources: *****
Resource NAME               INST   TARGET       STATE        SERVER          STATE_DETAILS
--------------------------- ----   ------------ ------------ --------------- -----------------------------------------
ora.LISTENER_SCAN1.lsnr        1   ONLINE       ONLINE       dsctw22         STABLE  
ora.LISTENER_SCAN2.lsnr        1   ONLINE       ONLINE       dsctw21         STABLE  
ora.LISTENER_SCAN3.lsnr        1   ONLINE       ONLINE       dsctw21         STABLE ...
ora.dsctw21.vip                1   ONLINE       ONLINE       dsctw21         STABLE  
ora.dsctw22.vip                1   ONLINE       ONLINE       dsctw22         STABLE  
ora.gns                        1   ONLINE       ONLINE       dsctw22         STABLE  
ora.gns.vip                    1   ONLINE    

Verify our NEW created GNS

[root@dsctw21 ~]# $GRID_HOME/bin/srvctl config gns -list
dsctw2.example.com DLV 50343 10 18 ( zfiaA8U30oiGSATInCdyN7pIKf1ZIVQhHsF6OQti9bvXw7dUhNmDv/txClkHX6BjkLTBbPyWGdRjEMf+uUqYHA== ) Unique Flags: 0x314
..
dsctw2.example.com NSEC3PARAM 10 0 2 ( jvm6kO+qyv65ztXFy53Dkw== ) Unique Flags: 0x314
dsctw2-scan.dsctw2 A 192.168.5.231 Unique Flags: 0x1
dsctw2-scan.dsctw2 A 192.168.5.234 Unique Flags: 0x1
dsctw2-scan.dsctw2 A 192.168.5.235 Unique Flags: 0x1
dsctw2-scan1-vip.dsctw2 A 192.168.5.231 Unique Flags: 0x1
dsctw2-scan2-vip.dsctw2 A 192.168.5.235 Unique Flags: 0x1
dsctw2-scan3-vip.dsctw2 A 192.168.5.234 Unique Flags: 0x1
dsctw21-vip.dsctw2 A 192.168.5.233 Unique Flags: 0x1
dsctw22-vip.dsctw2 A 192.168.5.237 Unique Flags: 0x1

[root@dsctw21 ~]#  nslookup dsctw2-scan.dsctw2.example.com
Server:        192.168.5.50
Address:    192.168.5.50#53

Non-authoritative answer:
Name:    dsctw2-scan.dsctw2.example.com
Address: 192.168.5.235
Name:    dsctw2-scan.dsctw2.example.com
Address: 192.168.5.234
Name:    dsctw2-scan.dsctw2.example.com
Address: 192.168.5.231

--> VIPS, SCAN and SCAN VIPS should be ONLINE

Congrats you have successfully reconfigured GNS on 12.2.0.1 !

Reference

One thought on “Recreate GNS 12.2”

  1. Hello –

    Thanks for the post. May i know your Laptop Configuration which your using for LAB setup.

    Ram –
    CPU –
    HDD –
    SSD –

    I am planing purchase laptop and want to practice 12C RAC.

    Thank you,

    Reply

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