自由軟體教學平台

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1 NCHC Opensource task force Steven Shiau National Center for High-Performance Computing Sep 10,

2 Outline Service DHCP, TFTP, NFS, NIS

3 DRBL (diskless remote boot in Linux) etherboot + nfs + nis 1. PC (client machine) 2. server client server server DRBL 3

4 ( ) 3. Server server client LTSP (Linux terminal server project) server server DRBL server LTSP server server 4

5 DRBL server NIC 1 NIC 2 NIC 3 NIC 4 switch 1 switch node001 node020 node021 node040 5

6 : CPU 450MHz 256 MB fast ethernet ( ) 20GBytes. : CPU 300 Mhz 128 MB fast ethernet bootrom : fast ethernet switch, port client machine 40 client machines 2 24 ports switch 6

7 server client node client node040 DHCP IP etherboot etherboot TFTP kernel boot boot NFS file system /, /usr, /home... /, /usr, /home... NIS account user login user login 7

8 Service DHCP, TFTP, NFS, NIS 1.DHCP server (Dynamic Host Configuration Protocol Server) - For distributing IP for every client - /etc/dhcpd.conf looks like: default-lease-time 21600; max-lease-time 21600; use-host-decl-names on; option subnet-mask ; subnet netmask { option broadcast-address ; option routers ; option domain-name-servers ; host node001 { hardware ethernet 00:50:BA:65:C0:58; fixed-address ; filename "vmlinuz.etherboot.viarhine"; }... } 8

9 Service( ) 2. TFTP server (Trivial File Transfer Protocol server) - For distributing kernel - /etc/xinetd.d/tftp looks like: service tftp { } socket_type protocol wait user server server_args disable per_source = 11 cps = = dgram = udp = yes = root = /usr/sbin/in.tftpd = -s /tftpboot = no 9

10 Service( ) 3. NFS server (Network File Sharing protocol server) - For mounting file system - /etc/exports looks like: /tftpboot/node (rw,no_root_squash) /usr (ro,no_root_squash) /opt (ro,no_root_squash) /home (rw,no_root_squash) /tftpboot/node (rw,no_root_squash) /usr (ro,no_root_squash) /opt (ro,no_root_squash) /home (rw,no_root_squash)... 10

11 Service( ) 4. NIS server (Network Information Service server) - For account authentization - /var/yp/securenets looks like: # allow connections from local host -- necessary host # same as # # allow connections from any host # on the network

12 1. server service dhcp server tftp server nfs server nis server (ypserv) 2. client machine remote boot kernel kernel etherboot bzimage mknbi-linux Tag 12

13 ( ) 3. server client /tftpboot ( node001 ),, dev, etc, lib, bin, sbin /tftpboot/node001 server NFS client,, client client /dev devfs, /tmp tmpfs server node ip redhat 7.3 client server 40MB 4.NCHC shell script client 13

14 Server 8 6 *:? Server: CPU 1 GHz, 1GB Ram, 1 gigabits NIC? Client: CPU 333 MHz, 128 MB Ram, 1 fast ethernet NIC? 2 fast ethernet switchs with 1 giga port connected to server Server CPU Utilization Without devfs & tmpfs? peak ~ 34%, average ~9.35% Server Disk I/O Utilization? read peak ~ 9MB/s, write peak ~ 5.8MB/sec,? read average ~ 61KB/s, write average ~ 430KB/sec Server Network Utilization? peak ~ 25MB/s, average ~ 9MB/sec, * 14

15 ? Diskless HOWTO? Diskless-nfs-root HOWTO? Diskless-nfs-root-other HOWTO? NIS HOWTO 15

自由軟體教學平台

自由軟體教學平台 NCHC Opensource task force DRBL steven@nchc.gov.tw, c00hkl00@nchc.gov.tw National Center for High-Performance Computing http://www.nchc.gov.tw Jan, 2003 1 2003/1/28 ( ) 09:00-10:30 10:40-12:00 Linux 13:00-14:30