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Exalogic Virtual Tea Break Snippets - Modifying Memory, CPU and Storage on a vServer

With the current release of Exalogic Virtual the Enterprise Manager Ops Center interface does not provide a support method for increasing the reasources associated with a running vServer. Therefore to increase the CPU, Memory or Disk size of a vServer we need to recreate vServer using the same Network information, mapped storage etc but with the new CPU, Memory and Disks space. Rather than simply destrying and then manually recreating the vServer we can use the SimpleExaCli.sh script described in the blog entry "Exalogic Virtual Tea Break Snippets - Simplified Exalogic IaaS Cli" to first create a template and capture the network information. Then using the generated Template and captured information to recreate the vServer with a new "VServer Type" that defines the new resource requirements. This blog entry will take you through the simple process of resizing the resources associated with an already existing Exalogic vServer.

Prerequisites

Before attempting to execute this procedure you will need to download the SimpleExaCli.sh from the Exalogic Virtual Tea Break Snippets - Simplified Exalogic IaaS Cli and install the Exalogic IaaS API/CLI as described. Once this has been done the simple step defined below will allow the modification of the existing resources.

Scenario

In this simple scenario I have a vServer, vsResizeTutorial, created using the default vServer Template and the SMALL VServer Type (4 GB Memory, 1 CPU & 4 GB Storage) connected to 3 networks EoIB-network1-vlan112-10.242.96.0/21 (Static IP), IPoIB-vserver-shared-storage (Automatic IP) and vnTutorial (Static IP). What we now want is a vServer with 8 GB Memory, 2 CPU and 8 GB Storage, which just happens to match the LARGE VServer Type, but keep the two static IP and we do not need to worry about the automatic because this is simply the shared storage.

 

Capturing vServer Information

To capture the current vServer information we will using the SimpleExaCli.sh --capture-vserver command to retrieve the current details and write them to an Asset file that can then be used with the --create-assets command to recreate the vServer. I will assume that the user has installed the SimpleExaCli.sh on the EMOC Control vServer and hence will not specify the -url for EMOC. Executing the following line will capture the current vServer information into a template called el_template_vsResizeTutorial.tgz located on the ZFS and an Asset file vsResizeTutorial.in within the current directory.

Note: If the vServer has attached Volumes these should be removed prior to the capture process otherwise they will be built intot he Template.
./SimpleExaCli.sh --capture-vserver -a andrew -v vsResizeTutorial -u tutorialuser -p welcome1 -cip 192.168.23.1 -sip 192.168.21.9 -keep-resolv -keep-hosts -vs-type LARGE

Output

[root@ec1-vm scripts]# ./SimpleExaCli.sh --capture-vserver -a andrew -v vsResizeTutorial -u tutorialuser -p welcome1 -cip 192.168.23.1 -sip 192.168.21.9 -keep-resolv -keep-hosts -vs-type LARGE JAVA_HOME is not defined using /usr/java/latest Stopping vServer vsResizeTutorial VSRV-ea84cf89-008d-42b8-86dc-0a36374094f0 Pausing until vServer has Shutdown vsResizeTutorial RUNNING Sleeping....... vsResizeTutorial SHUTDOWNDETACHED Just Waiting 30 Seconds...... Executing Remote Functions Additional  -keep-resolv -keep-hosts Copying script ./SimpleExaCli.sh to 192.168.23.1 SimpleExaCli.sh                                                                                                                                                          100%   75KB  75.4KB/s   00:00 JAVA_HOME is not defined using /usr/java/latest Copying vServer Files Copying /OVS/Repositories/0004fb00000300003c827205da5e5321/VirtualDisks/0004fb000012000095ecc177553544f8.img Ignoring vm.cfg entry : OVM_simple_name = 'vsResizeTutorial' Ignoring vm.cfg entry : disk = ['file:/OVS/Repositories/0004fb00000300003c827205da5e5321/VirtualDisks/0004fb000012000095ecc177553544f8.img,hda,w'] Ignoring vm.cfg entry : boot = 'c' Ignoring vm.cfg entry : name = '0004fb000006000049391befa0c1c62c' Ignoring vm.cfg entry : cpu_weight = 27500 Ignoring vm.cfg entry : cpu_cap = 0 Ignoring vm.cfg entry : OVM_high_availability = True Ignoring vm.cfg entry : on_poweroff = 'destroy' Ignoring vm.cfg entry : OVM_description = 'VServer for Resizing Blog Entry' Ignoring vm.cfg entry : vfb = ['type=vnc,vncunused=1,vnclisten=127.0.0.1'] Unconfiguring Root Image /u01/common/images/vServerTemplatesWIP/vsResizeTutorial/template/BASE/System.img Mounted /mnt/elsystem removed `etc/sysconfig/ovmd.orig' Keeping unmodified resolv.conf removed `root/.ssh/known_hosts' removed `etc/ssh/ssh_host_dsa_key' removed `etc/ssh/ssh_host_dsa_key.pub' removed `etc/ssh/ssh_host_key' removed `etc/ssh/ssh_host_key.pub' removed `etc/ssh/ssh_host_rsa_key' removed `etc/ssh/ssh_host_rsa_key.pub' Keeping unmodified hosts removed `etc/sysconfig/network-scripts/ifcfg-eth166_1.112' removed `etc/sysconfig/network-scripts/ifcfg-eth326_2.112' removed `etc/sysconfig/network-scripts/ifcfg-ib0.8003' removed `etc/sysconfig/network-scripts/ifcfg-ib0.8005' removed `etc/sysconfig/network-scripts/ifcfg-ib0.800e' removed `etc/sysconfig/network-scripts/ifcfg-ib1.8003' removed `etc/sysconfig/network-scripts/ifcfg-ib1.8005' removed `etc/sysconfig/network-scripts/ifcfg-ib1.800e' removed `etc/sysconfig/network-scripts/ifcfg-bond0' removed `etc/sysconfig/network-scripts/ifcfg-bond1' removed `etc/sysconfig/network-scripts/ifcfg-bond2' removed `etc/sysconfig/network-scripts/ifcfg-bond3' removed `var/log/messages' removed `var/log/messages.1' removed `var/log/ovm-template-config.log' removed `var/log/ovm-network.log' removed `var/log/boot.log' removed `var/log/boot.log.1' removed `var/log/cron' removed `var/log/cron.1' removed `var/log/maillog' removed `var/log/maillog.1' removed `var/log/rpmpkgs' removed `var/log/rpmpkgs.1' removed `var/log/secure' removed `var/log/secure.1' removed `var/log/spooler' removed `var/log/spooler.1' removed `var/log/yum.log' removed `var/log/yum.log.1' removed `var/log/dmesg' removed `etc/sysconfig/hwconf.orig' removed `etc/exalogic.conf' rm: cannot remove `root/.bash_history': No such file or directory Unmounted /mnt/elsystem Creating the Template tgz file System.img vm.cfg Template /u01/common/images/vServerTemplates/el_template_vsResizeTutorial.tgz file created Cleaning Working Directory removed `vsResizeTutorial/template/BASE/System.img' removed `vsResizeTutorial/template/BASE/vm.cfg' removed directory: `vsResizeTutorial/template/BASE' removed directory: `vsResizeTutorial/template' removed directory: `vsResizeTutorial' **************************************************** ** ** /u01/common/images/vServerTemplates/el_template_vsResizeTutorial.tgz has been created from ** vServer vsResizeTutorial ** **************************************************** Starting vServer vsResizeTutorial VSRV-ea84cf89-008d-42b8-86dc-0a36374094f0 Pausing until vServer is Running vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial NOSTATE Sleeping....... vsResizeTutorial RUNNING Just Waiting 30 Seconds...... Capturing Asset information to input file Generated Asset File vsResizeTutorialAsset.in **************************************************** ** ** /u01/common/images/vServerTemplates/el_template_vsResizeTutorial.tgz has been created from ** vServer vsResizeTutorial ** **************************************************** [root@ec1-vm scripts]#

It can be seen from the command-line above that I specified the new VServer Type using the -vs-type parameter. This is an optional parameter and if specified will use this VServer Type in the generated asset file rather than the existing one. The -keep-resolv and -keep-hosts flags tell the script not to reinitialise the resolv.conf and hosts files during the templatisation of the vServer.

vsResizeTutorialAsset.in File

If we look at the generated vsResizeTurtorialAsset.in file we can see that it contains all the information about the vServer except the Distribution Group which can not be obtained through the CLI. If the vServer needs to be placed in a Distribution Group then the -vs-dg parameter can be specified on the command line.

andrew:Connect|tutorialuser|welcome1 andrew:Upload|ServerTemplate|vsResizeTutorial-Template|http://192.168.21.9/shares/export/common/images/vServerTemplates/el_template_vsResizeTutorial.tgz andrew:Create|vServer|vsResizeTutorial|LARGE|vsResizeTutorial-Template|vnTutorial,IPoIB-vserver-shared-storage,EoIB-network1-vlan112-10.242.96.0/21|192.168.0.62,172.17.0.250,10.242.96.109||VServer_for_Resizing_Blog_Entry andrew:Disconnect

At this point we can not execute the -create-asset file with the generated one because the IPoIB-vserver-shared-storage was defined with an Automatic IP. Because we do not need to keep the same IP Address for this network we will modify the Create|vServer line to specify Automatic IP generation and this is done by replacing the existing IP address (172.17.0.250) with an * as follows.

andrew:Connect|tutorialuser|welcome1 andrew:Upload|ServerTemplate|vsResizeTutorial-Template|http://192.168.21.9/shares/export/common/images/vServerTemplates/el_template_vsResizeTutorial.tgz andrew:Create|vServer|vsResizeTutorial|LARGE|vsResizeTutorial-Template|vnTutorial,IPoIB-vserver-shared-storage,EoIB-network1-vlan112-10.242.96.0/21|192.168.0.62,*,10.242.96.109||VServer_for_Resizing_Blog_Entry andrew:Disconnect

You will also notice that the VServer Type specified is LARGE rather than the current SMALL, if you forget to add the -vs-type parmeter to the command line then the Asset file can be edited directly to implement this change.

Recreating the vServer

To resize the vServer we must now recreate it and the the first step will be to delete the existing vServer (we can not rename the existing vServer because it still holds the static IP Addresses). Once the vServer has been removed it can be recreated by executing the SimpleExaCli.sh with the -create-assets command as follows.

./SimpleExaCli.sh --create-assets -f vsResizeTutorialAsset.in -remove-ssh-key

Output

[root@ec1-vm scripts]# ./SimpleExaCli.sh --create-assets -f vsResizeTutorialAsset.in -remove-ssh-key JAVA_HOME is not defined using /usr/java/latest About to execute : /opt/oracle/iaas/cli/bin/iaas-create-server-template-from-url --name vsResizeTutorial-Template --url http://192.168.21.9/shares/export/common/images/vServerTemplates/el_template_vsResizeTutorial.tgz TMPL-cae0c067-3caf-4279-b5de-56a46d38d983 Pausing until Template upload has completed vsResizeTutorial-Template SCHEDULED Sleeping....... vsResizeTutorial-Template SCHEDULED Sleeping....... vsResizeTutorial-Template SCHEDULED Sleeping....... vsResizeTutorial-Template SCHEDULED Sleeping....... vsResizeTutorial-Template SCHEDULED Sleeping....... Creating vServer vsResizeTutorial Checking IP Address 192.168.0.62 Returning IP Address 192.168.0.62 Checking IP Address * Returning IP Address 172.17.0.240 Checking IP Address 10.242.96.109 Returning IP Address 10.242.96.109 About to execute : /opt/oracle/iaas/cli/bin/iaas-run-vserver --name vsResizeTutorial --key-name andrew.20130730-1040.13899.cli.asset.create --vserver-type 2007 --server-template-id TMPL-cae0c067-3caf-4279-b5de-56a46d38d983 --vnets VNET-53071bd4-a704-4a36-8ec0-63006bf6b3cf,VNET-73452bf7-1341-4508-a49a-4536922d485b,VNET-2544e1e2-7f9b-44ea-9696-d244c956563f --ip-addresses 192.168.0.62,172.17.0.240,10.242.96.109 VSRV-3209ca8f-e1a1-4a2a-a63e-7e6f7341b7d3 Pausing until vServer is Running vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial SCHEDULED Sleeping....... vsResizeTutorial RUNNING Just Waiting 30 Seconds...... 192.168.0.62 Address does not work for ssh send: spawn id exp6 not open     while executing "send "Password\r"" 172.17.0.240 Address works for ssh Removing ssh key requirement for vsResizeTutorial on 172.17.0.240 Stopping sshd: [  OK  ] Starting sshd: [  OK  ] Removed ssh key requirement for vsResizeTutorial vServer vsResizeTutorial has been created

As we can see from the Summary information below the vServer has now been recreated with the same Static IPs and the new VServer Type specified sizing.

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