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Chapter 9. Configuring RHEL 5.2 for cloning 139
00: DASD 0100 3390 LXAE23 R/W 3338 CYL ON DASD AE23 SUBCHANNEL = 0000
00: DASD 0101 3390 LXAE24 R/W 3338 CYL ON DASD AE24 SUBCHANNEL = 0001
...
00: DASD 0300 9336 (VDSK) R/W 524288 BLK ON DASD VDSK SUBCHANNEL = 000E
00: DASD 0301 9336 (VDSK) R/W 1048576 BLK ON DASD VDSK SUBCHANNEL = 000F...
8. Log off LINUX01.
You are now ready to clone to this new user ID.
9.3.2 Using the clone script
Go back to your an SSH session to the controller. The clone script should be in your PATH in
the directory /usr/sbin/. You can verify this with the which command:
# which clone
/usr/sbin/clone
The clone script can operate in two modes:
Where the DASD information is provided on the command line
Where the DASD information is included in the new user ID’s configuration file
Running clone with no arguments prints a usage message as follows:
# clone
Usage: clone [-v] masterGuestID cloneGuestID [rootMinidisk [minidisk1 minidisk2..]]
Switches
-v Verbose output
Required
masterGuestID the z/VM user id you want to clone from
cloneGuestID the z/VM user id you want to clone to
Optional
rootMinidisk the minidisk address that contains the root filesystem
minidisk1..n additional minidisks that should be copied
The masterGuestID is the z/VM ID of the master Linux image (RHEL52), and the cloneGuestID
is the z/VM ID of the target (LINUX01). These values are
always required.
If no DASD arguments are specified on the command line, then you can collect the DASD
information from the user’s configuration file stored in /etc/clone/. The script uses the DASD
value to determine which minidisks to copy as a part of the clone process. In the following
examples, DASD is set to 100-101, which implies that minidisks located at virtual addresses
100 and 101 are copied. The 300 and 301 VDISKs are omitted because SWAPGEN
automatically creates them each time the user logs on. The DASD_ROOT value specifies which
one of these minidisks contains the Linux root filesystem (/).
The script exits if either the golden image or the clone image is logged in. The script first
attempts to copy the disks with FLASHCOPY using the vmcp module or command. If an error
is returned, the script falls back to using Linux dasdfmt and dd commands. Finally, the script
boots the new Linux image using the xautolog command. It takes less than a minute to clone
with FLASHCOPY support, and three to 20 minutes with dd. The following is an example of
cloning from RHEL52 to LINUX01 with FLASHCOPY support. The example uses the verbose switch
(-v) to clarify its actions.
# clone -v rhel52 linux01
Invoking CP command: QUERY rhel52
Invoking CP command: QUERY linux01
This will copy disks from rhel52 to 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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