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140 The Virtualization Cookbook for Red Hat Enterprise Linux 5.2
Host name will be: linux01.example.com
IP address will be: 10.1.40.91
Do you want to continue? (y/n): y
The script makes sure the golden image user ID and the target user ID exist and are logged
off. Then, it confirms the order of the cloning and displays information collected from the
/etc/clone/linux01.conf file. Following this, it asks if you are sure you want to overwrite the
disks on the target user ID.
Next, the script links to the master clone minidisk and the target minidisk. The master
minidisks are linked to LNXINST at virtual address FFFE, and the target minidisks are linked as
FFFF. The FFFE links are read-only and the FFFF links are read-write. With the links in place,
the script issues a FLASHCOPY command to copy the master’s 100 and 101 minidisks to the
clone’s 100 and 101 minidisks, respectively. The script then detaches the links. If FLASHCOPY
fails, the script attempts to use dasdfmt and dd.
Cloning rhel52 to linux01 ...
Copying minidisks...
Invoking CP command: QUERY VIRTUAL FFFE
Invoking CP command: LINK RHEL52 0100 FFFE RR
Invoking CP command: QUERY VIRTUAL FFFF
Invoking CP command: LINK LINUX01 0100 FFFF W
Invoking CP command: FLASHCOPY FFFE 0 END FFFF 0 END
0100 disk copied ...
Invoking CP command: DETACH FFFE
Invoking CP command: DETACH FFFF
Invoking CP command: QUERY VIRTUAL FFFE
Invoking CP command: LINK RHEL52 0101 FFFE RR
Invoking CP command: QUERY VIRTUAL FFFF
Invoking CP command: LINK LINUX01 0101 FFFF W
Invoking CP command: FLASHCOPY FFFE 0 END FFFF 0 END
0101 disk copied ...
Invoking CP command: DETACH FFFE
Invoking CP command: DETACH FFFF
Next, the LVM is brought online if necessary to access the root file system. This only happens
if the variables VG_NAME and LV_ROOT were set in the linux01.conf configuration file. If so, you
will see output similar to the following:
Reading all physical volumes. This may take a while...
Found volume group "system_vg" using metadata type lvm2
Found volume group "install_vg" using metadata type lvm2
5 logical volume(s) in volume group "system_vg" now active
Then, the root file system is mounted to /mnt/clone, and the networking information is
modified in /mnt/clone/etc/sysconfig/network/ifcfg-eth0,
/mnt/clone/etc/sysconfig/network, and /mnt/clone/etc/hosts:
Updating cloned image ...
Invoking CP command: QUERY VIRTUAL FFFF
Invoking CP command: LINK LINUX01 0100 FFFF W
Modifying networking info under /mnt/clone...
Regenerating SSH keys in /mnt/clone/etc/ssh/ ...
Invoking CP command: DETACH FFFF
Clone complete
Then the SSH keys are regenerated in such a way that they are unique for the new virtual
server. The new root file system is then unmounted, set offline, and detached:
Invoking CP command: XAUTOLOG LINUX01
Booting linux01
- The Virtualization Cookbook 1
- Linux 5.2 3
- October 2008 3
- First Edition (October 2008) 4
- Contents 5
- Contents v 7
- Contents vii 9
- Trademarks 12
- The team that wrote this book 13
- Chapters and appendixes 15
- Conventions 17
- Comments welcome 17
- 1.1 What is virtualization 20
- 1.2 This book’s approach 21
- 1.4 Infrastructure design 22
- Planning 25
- 2.1 Bill of materials 26
- 2.2 z/VM conventions 27
- 2.3 Disk planning 28
- DASD versus SCSI/FCP 29
- 3390-3s versus 3390-9s 29
- Disk storage per Linux image 29
- 2.4 Memory planning 30
- 2.5 Password planning 30
- 2.6 Planning worksheets 31
- 2.7 Blank worksheets 34
- 2.7.2 z/VM DASD worksheet 35
- Configuring a desktop machine 37
- Figure 3-2 Setting logging 39
- Saving sessions 41
- 3.2 Setting up a VNC client 42
- 3.3 3270 emulators 43
- 4.1 Installing z/VM from DVD 46
- ==> instplan 50
- Running INSTDVD 52
- Figure 4-8 Load window 53
- ==> cold drain noautolog 54
- ==> no 54
- ==> disc 54
- 4.2 Configuring TCP/IP 56
- not specified 62
- 4.6 Adding paging volumes 65
- Using the CPFORMAT EXEC 67
- 4.6.4 Testing the changes 71
- 4.8.2 Testing the changes 78
- 4.9.1 VM security products 79
- ==> sampnss cms 86
- Servicing z/VM 89
- 5.1 Applying a PTF 90
- 6.4 Enabling the NFS server 106
- 7.2.3 Configuring VDISK swap 128
- 7.2.4 Configuring yum 128
- 7.2.5 Adding additional RPMs 129
- 7.2.10 Configuring SSH keys 134
- 4 6763) is running 135
- 8.2.4 Adding additional RPMs 145
- 8.2.8 Configuring SSH keys 145
- 8.2.9 Rebooting the system 146
- 8.2.10 Verifying the changes 146
- Detach the source disks 151
- Detach the target disks 154
- IPL the target system 154
- 9.3.2 Using the clone script 157
- FLASHCOPY 159
- Installation Server 159
- Master Image 159
- 9.5 Reviewing system status 163
- LNXMAINT 164
- Delete these 167
- Servicing Linux with Red Hat 171
- 12.1.2 Testing Apache 179
- 12.1.3 Turning on a firewall 179
- 12.1.6 Apache resources 182
- Start the LDAP service 184
- Deleting duplicate users 186
- Set a password 189
- 12.3.4 Adding a Samba user 191
- 12.3.6 Testing your changes 192
- 12.3.7 Configuring printing 193
- 12.4.1 Additional resources 194
- Linux kernel development 195
- Web development 195
- Miscellaneous recipes 197
- 13.1 Adding a logical volume 198
- Volume Group - optvg 200
- Creating a physical volume 204
- Extending the volume group 204
- /var/lib/ldap 205
- Configuring LDAP 206
- Configuring automount 207
- 13.4 Rescuing a Linux system 208
- Monitoring z/VM and Linux 211
- INIDICATE LOAD 212
- INDICATE QUEUES EXP 213
- Getting help 214
- Determining who is logged on 214
- Determining storage or memory 215
- Determining software level 215
- 14.2.3 Configuring PERFSVM 218
- Using a Web browser interface 220
- Using a 3270 interface 222
- 14.3 Monitoring Linux 223
- PURGE NSS NAME MONDCSS 228
- CP SAVESEG MONDCSS 228
- References 229
- Quick reference sheets 230
- Prefix commands 231
- :help give help 232
- Appendix B. z/VM source code 233
- The CPFORMAT EXEC 234
- The CHPW540 XEDIT macro 238
- The LABEL540 EXEC 241
- The LABEL540 XEDIT macro 243
- Linux source code 245
- Related publications 257
- Online resources 258
- How to get Redbooks 258
- Help from IBM 258
- Hat Enterprise Linux 5.2 265
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