LOGICAL DOMAINS (CONFIGURING CONTROL DOMAIN LIVE MIGRATION)

LOGICAL DOMAINS (CONFIGURING CONTROL DOMAIN LIVE MIGRATION)

 

 

 

Logical Domains (Ldom) is a kind of virtualization that permit to users or administrators , allocate system resources from one server to multiple VM's, where each Virtual Machine can use its own operating system.

 

You will need to have Oracle Server that support it, for example  T1XXXX until T5XXXX

 

Now what do you need to configurate it, You need two servers in order to have or testing Live Migration, What configuration we need?

 

I will show how to configurate the Link Aggregation in order to virtualizate the switch with Aggregation.

 

1.- The network team need to configurate the interfaces in order to do the Link Aggregation

 

Once we have received the information from network team that Link Aggregation is configured:

We can proceed to configure two Link Aggregation (host administration 192.168.1.20 /backup 192.168.2.30)

root@t5# dladm create-aggr -P L3 -L active -l net2 -l net4 aggr1

root@t5# dladm create-aggr -P L3 -L active -l net6 -l net8 aggr2

root@t5# ipadm create-ip aggr1
root@t5# ipadm create-ip aggr2
root@t5# ipadm create-addr -T static -a 192.168.1.20/24 aggr1/v4
root@t5# ipadm create-addr -T static -a 192.168.2.30/24 aggr2/v4
root@t5# ifconfig -a 
 

Validate the current configuration on the server, you can list the information as below

root@t5# ldm list
NAME             STATE      FLAGS   CONS    VCPU  MEMORY   UTIL  NORM  UPTIME
primary           active        -n-cv-        UART    255        256G       0.5%  0.5%     84d 5h 18m

 

Save this output in order to understand how the resources are reserved when you assign resources some steps below

root@t5# ldm list-device

CORE
 ID      %FREE   CPUSET
 0       100    (0,1,2,3,4, 5, 6, 7)
 1       100    (8, 9, 10, 11, 12, 13, 14, 15)
 2       100    (16, 17, 18, 19, 20, 21, 22, 23)

MEMORY
 PA                   SIZE
 0x130000000           128G
 0x80000000000       128G

You can see above that we have a server with 255 VCPU and 512 GB allocated in memory, that you can assing to the Virtual Machines, however we can reserve to the T5  in this case 4 VCPU and 4 G memory

 

How we can do that

 

root@t5# ldm set-mau 1 primary             (Security Encryption)

root@t5# ldm set-vcpu 4 primary           

root@t5# ldm set-memory 4G primary

root@t5# ldm list-device

CORE
ID %FREE CPUSET
0 100 (4, 5, 6, 7)
1 100 (8, 9, 10, 11, 12, 13, 14, 15)
2 100 (16, 17, 18, 19, 20, 21, 22, 23)

MEMORY
PA SIZE
0x130000000     123G
0x80000000000 128G

 

Create a new profile the current configuration

 

root@t5# ldm add-spconfig t5

root@t5# ldm ls-spconfig

factory-default
initial [next poweron]

Finally in order to close this part of the configuration you can check that the change has been done.

root@t5# ldm list
NAME STATE FLAGS CONS VCPU MEMORY UTIL NORM UPTIME
primary active    -n-cv- UART    4            4G     0.5% 0.5%    84d 5h 18m

In order to understand what core or vcpu where assigned if you want you can run "ldm list-devices -a, all the processor  with %FREE in zero and PM "No" are busy

VCPU
    PID     %FREE   PM
    0               0       no
    1               0       no
    2               0       no
    3               0       no

We finished to configure the Control Domain.

CONFIGURING SERVICES IN THE CONTROL DOMAIN

 

Configuring the access to console for the different guest domains

root@t5# ldm add-vcc port-range=5000-5100 primary-vcc0 primary

 

Now we have configured the console from port 5000-5100, now we have to define the virtual switches

 

root@t5# ldm add-vsw net-dev=aggr1 primary-vsw0 primary

root@t5# ldm add-vsw net-dev=aggr2 primary-vsw1 primary

Above we configured with the Link Aggregations created previously the Virtual Switches across the Guest Domain will have connection.

 

Finally we can create the VDS that control all the disk allocated to the Control Domain

 

root@t5# ldm add-vds primary-vds0 primary

 

Checking the configuration for the new services created in the Control Domain

 

root@t5#ldm list-services
VCC
    NAME             LDOM             PORT-RANGE
    primary-vcc0     primary          5000-5100

VSW
    NAME             LDOM             MAC               NET-DEV   ID   DEVICE     LINKPROP   DEFAULT-VLAN-ID PVID VID                  MTU   MODE   INTER-VNET-LINK
    primary-vsw0     primary          00:14:4f:f1:12:4d aggr1     0    switch@0              1               1                         1500         on
    primary-vsw1     primary          00:14:4f:f2:32:10 aggr2     1    switch@1              1               1                         1500         on

VDS
    NAME             LDOM             VOLUME         OPTIONS          MPGROUP        DEVICE
    primary-vds0     primary

 

You will need to repeat the same steps over the other domain with the others IP's assigned by network team.

We have ready to ask to Storage Team to assign the LUN's and Now you can configurate the Guest Domains, I will aboard the topic in other blog.

Regards
Roger