Listener

How to Add a Cluster Listener on Second Network to Grid

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I assume that you have added the second network to the grid infrastructure. Let’s continue our work. Make sure the second network is available in the grid infrastructure. [grid@primary01 admin]$ srvctl config network -k 2 Network 2 exists Subnet IPv4: 10.0.8.0/255.255.255.0/eth2, static Subnet IPv6: Ping Targets: Network is enabled Network is individually enabled on nodes: […]
Network

How to Add a Subnet to Grid

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Servers that have multiple network interfaces may offload the traffic by adding another subnet to grid infra. In this post, I demonstrate how I add another subnet (i.e. 10.0.8/24) from OS to grid infrastructure.Please note that, network resource object is a synonym of subnet from grid infrastructure’s perspective.First of all, we need to configure the […]
SCAN IP

How to Add a SCAN VIP to Grid

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Looking up SCAN name on DNS before adding a SCAN VIP[root@primary01 ~]# nslookup primary-cluster-scanServer:         10.0.0.199Address:        10.0.0.199#53Name:   primary-cluster-scan.example.comAddress: 10.0.0.82Name:   primary-cluster-scan.example.comAddress: 10.0.0.81Name:   primary-cluster-scan.example.comAddress: 10.0.0.83There’re 3 SCAN VIPs for this name.Adding a SCAN VIP to DNS[root@dns ~]# cd /var/named/[root@dns named]# vi example.com.zone[root@dns named]# vi 0.10.zone[root@dns named]# systemctl restart […]
Network

How to Change Subnet of Grid

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Oracle 12c uses 4 types of IP addresses to configure network of RAC:Public IPPrivate IPVirtual IPSCAN IPIn which, Public IP, Virtual IP and SCAN IP are in the same subnet. Up to 4 pairs of Private IP can be set in RAC, which should be in another subnet and used for interconnect redundancy to secure […]
BIND

How to Configure BIND Named Service on Enterprise Linux 7

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Since we are running on CentOS 7.1 Minimal which has no default named service, so we need to install it either by yum install bind bind-utils or yum groupinstall “DNS Name Server”.[root@primary-dns ~]# yum -y install bind bind-utilsLoaded plugins: fastestmirrorLoading mirror speeds from cached hostfile * base: centos.cs.nctu.edu.tw * extras: centos.cs.nctu.edu.tw * updates: centos.cs.nctu.edu.twResolving Dependencies–> Running transaction check—> […]