수업 두번 째 날 - server1, server2, server3 설정 및 확인

필기_2일째.txt

server1

192.168.56.101

server2

192.168.56.102

server3

192.168.56.103

[CentOS 6 Gnome i386]

오른쪽마우스 클릭 -> 복제 -> full clone

server1번부터 3번까지 (로그인 하지 않고)차례대로 시

작(->초록색화살표 클릭) 

ifconfig

1.

vi /etc/sysconfig/network     

2. server1로 설정

NETWORKING=yes

HOSTNAME=server1

vi /etc/hosts

192.168.56.101 server1

192.168.56.102 server2

192.168.56.103 server3

system-shutdown 하고 나서 서버 2 시작

2.

ifconfig

system->network connections - system eth0 더블클릭

[IPv4 settiongs]탭에서 Adress 192.168.56.101을 

192.168.56.102로 바꿈

또

1.

vi /etc/sysconfig/network 

2. server2로 설정

NETWORKING=yes

HOSTNAME=server2

3.

vi /etc/hosts

192.168.56.101 server1

192.168.56.102 server2

192.168.56.103 server3   

①번을 3번으로 바꾼채 반복

[CentOS 6 Gnome i386], [server2], [server3]

오른쪽마우스-네트워크-어댑터2-네트워크 어댑터 사용하

기 해제

다시 서버 1~3 시작하고

ifconfig

에서 ip확인하고

hostname

치고 호스트네임 확인

----------------------------------------------

하둡 클러스터가 동작되면서 각,, 네임노드의 파일 생성

파일을 생성할 때 생성할 수 있는 열쇠가 필요

ip와 호스트로 확인

---------------------------------------------

* ssh인증키

cd ~/.ssh

ssh 디렉토리

ls

known_host는 name노드가 슬레이브에게 스타트업해 라는 

등등 명령어 입력함

네임노드가 서버1에게 명령을 내릴수 있는지 확인후, 공

개키(id_dsa.pub)를 보유하고있는지 확인

rm -rf ~/.ssh/*

ls

ssh server1 (sever1에게 명령 내리려함)

yes

하면 니가 누구냐?

root@server1's password:  reverse

exit (서버 빠져나올때 항상 cllose 시켜줘야함)

ls

known_hosts (이게 생성되어있음)

vi known_hosts

server1 ssh-rsa 

AAAAB3NzaC1yc2EAAAABIwAAAQEAyEu2qs2J4WVFfrzdh5lPpWvAm6nuab9QzA99JYdzDx4aTE0xgNqXl5Dk86BpTYHi1CE1S8B3keoiAbGJhftU7ScJGgaHhOJLJb/zdgLgdHT8FA/biiu2/4Qoiudgg9T9DC7KefBUvWS7JirUUF+IN08vuxuJItaFW8gewZ+pkmJG2vpnyvnBGdoeOcaFUzn4lFjFGp7S4/Nl0IseOI5blTlFlqCcbVDBgClYOyEJoLfJ1Tj1q2z1irRFGkIyhlxnbJV6dl7fvjcHaFIRgQlPccRTNDVo8Xv9wErIV9EZ4+MMrJVRRLBMYWSzaA11RIB3dtX8AK19KEw1O+G4QHXyBQ==

[root@server1 .ssh]#ssh server2

The authenticity of host 'server2 (192.168.56.102)' can't be established.

RSA key fingerprint is 1b:03:a6:95:98:76:db:7a:16:86:d5:f6:7f:5b:e8:49.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'server2,192.168.56.102' (RSA) to the list of known hosts.

하면 호스트네임이 server2로 됨

root@server2's password: 

Last login: Sat Mar  7 16:40:57 2015 from namenode

[root@server2 ~]# exit

logout

Connection to server2 closed.

server1 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAyEu2qs2J4WVFfrzdh5lPpWvAm6nuab9QzA99JYdzDx4aTE0xgNqXl5Dk86BpTYHi1CE1S8B3keoiAbGJhftU7ScJGgaHhOJLJb/zdgLgdHT8FA/biiu2/4Qoiudgg9T9DC7KefBUvWS7JirUUF+IN08vuxuJItaFW8gewZ+pkmJG2vpnyvnBGdoeOcaFUzn4lFjFGp7S4/Nl0IseOI5blTlFlqCcbVDBgClYOyEJoLfJ1Tj1q2z1irRFGkIyhlxnbJV6dl7fvjcHaFIRgQlPccRTNDVo8Xv9wErIV9EZ4+MMrJVRRLBMYWSzaA11RIB3dtX8AK19KEw1O+G4QHXyBQ==

server2,192.168.56.102 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAyEu2qs2J4WVFfrzdh5lPpWvAm6nuab9QzA99JYdzDx4aTE0xgNqXl5Dk86BpTYHi1CE1S8B3keoiAbGJhftU7ScJGgaHhOJLJb/zdgLgdHT8FA/biiu2/4Qoiudgg9T9DC7KefBUvWS7JirUUF+IN08vuxuJItaFW8gewZ+pkmJG2vpnyvnBGdoeOcaFUzn4lFjFGp7S4/Nl0IseOI5blTlFlqCcbVDBgClYOyEJoLfJ1Tj1q2z1irRFGkIyhlxnbJV6dl7fvjcHaFIRgQlPccRTNDVo8Xv9wErIV9EZ4+MMrJVRRLBMYWSzaA11RIB3dtX8AK19KEw1O+G4QHXyBQ==

그리고 다시 server3 똑같이 반복

[root@server1 .ssh]# ssh server3

The authenticity of host 'server3 (192.168.56.103)' can't be established.

RSA key fingerprint is 1b:03:a6:95:98:76:db:7a:16:86:d5:f6:7f:5b:e8:49.

Are you sure you want to continue connecting (yes/no)? yes

Warning: Permanently added 'server3,192.168.56.103' (RSA) to the list of known hosts.

root@server3's password: 

Last login: Sat Mar  7 16:40:57 2015 from namenode

[root@server3 ~]# exit

logout

Connection to server3 closed.

[root@server1 .ssh]# vi known_hosts

server1 ssh-rsa 

AAAAB3NzaC1yc2EAAAABIwAAAQEAyEu2qs2J4WVFfrzdh5lPpWvAm6nuab9QzA99JYdzDx4aTE0xgNqXl5Dk86BpTYHi1CE1S8B3keoiAbGJhftU7ScJGgaHhOJLJb/zdgLgdHT8FA/biiu2/4Qoiudgg9T9DC7KefBUvWS7JirUUF+IN08vuxuJItaFW8gewZ+pkmJG2vpnyvnBGdoeOcaFUzn4lFjFGp7S4/Nl0IseOI5blTlFlqCcbVDBgClYOyEJoLfJ1Tj1q2z1irRFGkIyhlxnbJV6dl7fvjcHaFIRgQlPccRTNDVo8Xv9wErIV9EZ4+MMrJVRRLBMYWSzaA11RIB3dtX8AK19KEw1O+G4QHXyBQ==

server2,192.168.56.102 ssh-rsa 

AAAAB3NzaC1yc2EAAAABIwAAAQEAyEu2qs2J4WVFfrzdh5lPpWvAm6nuab9QzA99JYdzDx4aTE0xgNqXl5Dk86BpTYHi1CE1S8B3keoiAbGJhftU7ScJGgaHhOJLJb/zdgLgdHT8FA/biiu2/4Qoiudgg9T9DC7KefBUvWS7JirUUF+IN08vuxuJItaFW8gewZ+pkmJG2vpnyvnBGdoeOcaFUzn4lFjFGp7S4/Nl0IseOI5blTlFlqCcbVDBgClYOyEJoLfJ1Tj1q2z1irRFGkIyhlxnbJV6dl7fvjcHaFIRgQlPccRTNDVo8Xv9wErIV9EZ4+MMrJVRRLBMYWSzaA11RIB3dtX8AK19KEw1O+G4QHXyBQ==

server3,192.168.56.103 ssh-rsa AAAAB3NzaC1yc2EAAAABIwAAAQEAyEu2qs2J4WVFfrzdh5lPpWvAm6nuab9QzA99JYdzDx4aTE0xgNqXl5Dk86BpTYHi1CE1S8B3keoiAbGJhftU7ScJGgaHhOJLJb/zdgLgdHT8FA/biiu2/4Qoiudgg9T9DC7KefBUvWS7JirUUF+IN08vuxuJItaFW8gewZ+pkmJG2vpnyvnBGdoeOcaFUzn4lFjFGp7S4/Nl0IseOI5blTlFlqCcbVDBgClYOyEJoLfJ1Tj1q2z1irRFGkIyhlxnbJV6dl7fvjcHaFIRgQlPccRTNDVo8Xv9wErIV9EZ4+MMrJVRRLBMYWSzaA11RIB3dtX8AK19KEw1O+G4QHXyBQ==

~    

위와 같이 server가 등록되어 있으면, 다시 서버 접속 (password) 안물어봄.

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