As described in the DNS requirements for 4.6, etcd-0,1,2 records are not needed any more.

[hongweijia]

As described in the DNS requirements for OCP 4.6, etcd-0,1,2 records are not needed any more.
https://docs.openshift.com/container-platform/4.6/installing/installing_bare_metal/installing-bare-metal.html#installation-dns-user-infra_installing-bare-metal

ERROR: nslookup etcd-0.bj-prod-5.luban.cdl.ibm.com should return the master-0 ip 9.123.127.132 nslookup output is shown below
Server: 9.0.148.50
Address: 9.0.148.50#53

** server can't find etcd-0.bj-prod-5.luban.cdl.ibm.com: NXDOMAIN

ERROR: nslookup etcd-1.bj-prod-5.luban.cdl.ibm.com should return the master-1 ip 9.123.127.133 nslookup output is shown below
Server: 9.0.148.50
Address: 9.0.148.50#53

** server can't find etcd-1.bj-prod-5.luban.cdl.ibm.com: NXDOMAIN

ERROR: nslookup etcd-2.bj-prod-5.luban.cdl.ibm.com should return the master-2 ip 9.123.127.134 nslookup output is shown below