복사되었습니다!
OS 환경 : Oracle Linux 8.7 (64bit)
DB 환경 : Oracle Database 19.27.0.0
에러 : ping: ora19fs: Name or service not known
/etc/hosts에 등록된 내 hostname으로 ping이 안가는 문제
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# ping ora19fs
ping: ora19fs: Name or service not known
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ip로 ping 시도
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# ping 192.168.137.50
PING 192.168.137.50 (192.168.137.50) 56(84) bytes of data.
64 bytes from 192.168.137.50: icmp_seq=1 ttl=64 time=0.034 ms
64 bytes from 192.168.137.50: icmp_seq=2 ttl=64 time=0.023 ms
^C
--- 192.168.137.50 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 0.023/0.028/0.034/0.007 ms
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ip로는 ping이 잘 나감
/etc/hosts 파일 확인
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# cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
192.168.137.50 ora19fs
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서버 ip와 hostname이 등록되어 있음
ifconfig 확인
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# ifconfig
ens160: flags=4163<UP,BROADCAST,RUNNING,MULTICAST> mtu 1500
inet 192.168.137.50 netmask 255.255.255.255 broadcast 0.0.0.0
inet6 fe80::250:56ff:fea8:5e35 prefixlen 64 scopeid 0x20<link>
ether 00:50:56:a8:5e:35 txqueuelen 1000 (Ethernet)
RX packets 8396264 bytes 23773996360 (22.1 GiB)
RX errors 0 dropped 105 overruns 0 frame 0
TX packets 4015031 bytes 287037135 (273.7 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
lo: flags=73<UP,LOOPBACK,RUNNING> mtu 65536
inet 127.0.0.1 netmask 255.0.0.0
inet6 ::1 prefixlen 128 scopeid 0x10<host>
loop txqueuelen 1000 (Local Loopback)
RX packets 154082 bytes 7592832 (7.2 MiB)
RX errors 0 dropped 0 overruns 0 frame 0
TX packets 154082 bytes 7592832 (7.2 MiB)
TX errors 0 dropped 0 overruns 0 carrier 0 collisions 0
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ip도 /etc/hosts 등록한 ip가 맞음
/etc/resolv.conf 파일 dns 정보 확인
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# cat /etc/resolv.conf
# Generated by NetworkManager
nameserver 8.8.8.8
nameserver 8.8.4.4
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정상임
외부 ping 확인
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# ping 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=113 time=32.6 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=113 time=32.5 ms
^C
--- 8.8.8.8 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1002ms
rtt min/avg/max/mdev = 32.516/32.540/32.564/0.024 ms
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정상임
hostname 확인
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# hostname
ora19fs
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/etc/hosts 등록한 hostname(ora19fs)이 맞음
해결 방법 : /etc/nsswitch.conf에서 hosts 주석 해제
/etc/nsswitch.conf 파일 확인
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# cat /etc/nsswitch.conf | grep host
# hosts: files dns
# hosts: files dns # from user file
# Valid databases are: aliases, ethers, group, gshadow, hosts,
# myhostname Use systemd host names
#hosts: files dns myhostname
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여기서 hosts 부분이 주석처리 되어있음
/etc/nsswitch.conf 파일 수정
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# vi /etc/nsswitch.conf
hosts: files dns myhostname
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hosts 부분 주석 해제
다시 ping 확인
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# ping ora19fs
PING ora19fs (192.168.137.50) 56(84) bytes of data.
64 bytes from ora19fs (192.168.137.50): icmp_seq=1 ttl=64 time=0.035 ms
64 bytes from ora19fs (192.168.137.50): icmp_seq=2 ttl=64 time=0.023 ms
^C
--- ora19fs ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1024ms
rtt min/avg/max/mdev = 0.023/0.029/0.035/0.006 ms
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정상적으로 hostname으로도 ping이 잘감
원인 : /etc/nsswitch.conf의 hosts 부분의 주석
이전에 테스트를 하다가 /etc/nsswitch.conf의 hosts 부분을 주석처리 해놓아서 발생한 문제
주석을 해제한 뒤 정상화됨
참조 :
PRVF-0002 : could not retrieve local node name ( https://positivemh.tistory.com/738 )