1. Introduction to Diskless Remote Boot Linux Introduction to Diskless Remote Boot Linux Jazz Wang Yao-Tsung Wang jazz@nchc.org.tw Jazz Wang Yao-Tsung Wang jazz@nchc.org.tw

2. At First, We have “ 4 + 1 ” PC Cluster It'd better be 2 n It'd better be 2 n Manage Schedule r Manage

3. Disk Resource Graphic Resource RAM Resource CPU Resource Each PC has AMD64 CPU x 4, 512MB RAM x 4, 120GB Disk x 4, PCI-E Graphic Card x 3 Each PC has AMD64 CPU x 4, 512MB RAM x 4, 120GB Disk x 4, PCI-E Graphic Card x 3

4. Disk Resource Graphic Resource RAM Resource CPU Resource Total Resource = AMD64 CPU x 20, Total Resource = AMD64 CPU x 20, 512MB RAM x 20 = 10 GB RAM, 120GB Disk x 20 = 2.4 TB Disk, PCI-E Graphic Card x 15 Total Resource = AMD64 CPU x 20, Total Resource = AMD64 CPU x 20, 512MB RAM x 20 = 10 GB RAM, 120GB Disk x 20 = 2.4 TB Disk, PCI-E Graphic Card x 15

5. GiE Switch WANWAN Then, We connect 5 PCs with Gigabit Ethernet Switch Then, We connect 5 PCs with Gigabit Ethernet Switch 10/100/1000MBps10/100/1000MBps Add 1 NIC for WAN Add 1 NIC for WAN

6. LAN Switch WANWAN 4 Compute Nodes will communicate via LAN Switch. Only Manage Node have Internet Access for Security! Compute Nodes Manage Node

7. DRBL Client PCs LAN Switch WANWAN DRBL Server For Effective Management, We'll install DRBL Server on Manage Node, and Compute Nodes become DRBL Client. For Effective Management, We'll install DRBL Server on Manage Node, and Compute Nodes become DRBL Client.

8. 1st, We install Base System of GNU/Linux on Management Node. You can choose: Redhat, Fedora, CentOS, Mandriva, Ubuntu, Debian,... 1st, We install Base System of GNU/Linux on Management Node. You can choose: Redhat, Fedora, CentOS, Mandriva, Ubuntu, Debian,... Linux Kernel Kernel Module GNU Libc Boot Loader

9. 2nd, We install DRBL package and configure it as DRBL Server. There are lots of service needed: SSHD, DHCPD, TFTPD, NFS Server, NIS Server, YP Server... 2nd, We install DRBL package and configure it as DRBL Server. There are lots of service needed: SSHD, DHCPD, TFTPD, NFS Server, NIS Server, YP Server... DHCP D TFTP D NFSNFS BashBashPerlPerl Network Booting YPYPNISNIS Account Mgnt. DRBL Server based on existing Open Source and keep Hacking! DRBL Server based on existing Open Source and keep Hacking! SSH D Linux Kernel Kernel Module GNU Libc Boot Loader

10. pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe Config. Files Ex. hostname Config. Files Ex. hostname After running “drblsrv -i” & “drblpush -i”, there will be pxelinux, vmlinux-pex, initrd-pxe in TFTPROOT, and different configuration files for each Compute Node in NFSROOT After running “drblsrv -i” & “drblpush -i”, there will be pxelinux, vmlinux-pex, initrd-pxe in TFTPROOT, and different configuration files for each Compute Node in NFSROOT Linux Kernel Kernel Module GNU Libc Boot Loader DHCP D TFTP D NFSNFSYPYPNISNIS SSH D

11. BIOS PXE 3nd, We enable PXE function in BIOS configuration. 3nd, We enable PXE function in BIOS configuration. pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe Config. Files Ex. hostname Config. Files Ex. hostname Linux Kernel Kernel Module GNU Libc Boot Loader DHCP D TFTP D NFSNFSYPYPNISNIS SSH D

12. BIOS PXE While Booting, PXE will query IP address from DHCPD. While Booting, PXE will query IP address from DHCPD. pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe Config. Files Ex. hostname Config. Files Ex. hostname Linux Kernel Kernel Module GNU Libc Boot Loader TFTP D NFSNFSYPYPNISNIS SSH D DHCP D

13. IP 1 IP 2 IP 3 IP 4 While Booting, PXE will query IP address from DHCPD. While Booting, PXE will query IP address from DHCPD. pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe Config. Files Ex. hostname Config. Files Ex. hostname Linux Kernel Kernel Module GNU Libc Boot Loader TFTP D NFSNFSYPYPNISNIS SSH D DHCP D

14. IP 1 IP 2 IP 3 IP 4 After PXE get its IP address, it will download booting files from TFTPD. Config. Files Ex. hostname Config. Files Ex. hostname Linux Kernel Kernel Module GNU Libc Boot Loader NFSNFSYPYPNISNIS SSH D DHCP D pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe TFTP D

15. IP 1 IP 2 IP 3 IP 4 Config. Files Ex. hostname Config. Files Ex. hostname Linux Kernel Kernel Module GNU Libc Boot Loader NFSNFSYPYPNISNIS SSH D DHCP D pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe TFTP D pxelinuxpxelinux vmlinuzvmlinuz initrdinitrd pxelinuxpxelinux vmlinuzvmlinuz initrdinitrd pxelinuxpxelinux vmlinuzvmlinuz initrdinitrd pxelinuxpxelinux vmlinuzvmlinuz initrdinitrd

16. Config. Files Ex. hostname Config. Files Ex. hostname Linux Kernel Kernel Module GNU Libc Boot Loader YPYPNISNIS SSH D DHCP D initrdinitrdinitrdinitrdinitrdinitrd IP 1 IP 2 IP 3 IP 4 pxelinuxpxelinux vmlinuzvmlinuz pxelinuxpxelinux vmlinuzvmlinuz pxelinuxpxelinux vmlinuzvmlinuz pxelinuxpxelinux vmlinuzvmlinuz initrdinitrd pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe TFTP D After downloading booting files, scripts in initrd-pxe will config NFSROOT for each Compute Node. NFSNFS

17. Linux Kernel Kernel Module GNU Libc Boot Loader YPYPNISNIS SSH D DHCP D initrdinitrdinitrdinitrdinitrdinitrd IP 1 IP 2 IP 3 IP 4 pxelinuxpxelinux vmlinuzvmlinuz pxelinuxpxelinux vmlinuzvmlinuz pxelinuxpxelinux vmlinuzvmlinuz pxelinuxpxelinux vmlinuzvmlinuz initrdinitrd pxelinuxpxelinux vmlinuz-pxevmlinuz-pxe initrd-pxeinitrd-pxe TFTP D Config. Files Ex. hostname Config. Files Ex. hostname NFSNFS Config. 1 Config. 2 Config. 3 Config. 4

18. DRBL Server YPYPNISNIS DHCP D TFTP D NFSNFS BashBashPerlPerl SSH D BashBash PerlPerl SSHDSSHD BashBash PerlPerl SSHDSSHD BashBash PerlPerl SSHDSSHD BashBash PerlPerl SSHDSSHD Applications and Services will also deployed to each Compute Node via NFS.... Applications and Services will also deployed to each Compute Node via NFS....

19. DRBL Server DHCP D TFTP D With the help of NIS and YP, You can login each Compute Node with the Same ID / PASSWORD stored in DRBL Server! With the help of NIS and YP, You can login each Compute Node with the Same ID / PASSWORD stored in DRBL Server! NFSNFS SSH D YPYPNISNIS SSHDSSHDSSHDSSHDSSHDSSHDSSHDSSHD SSH Client

20. Questions?Questions? Jazz Wang Yao-Tsung Wang jazz@nchc.org.tw Jazz Wang Yao-Tsung Wang jazz@nchc.org.tw