In the event you have two systems configured with identical UUIDs for their primary/control domain, for example following a disk clone or system duplication, or if you wish to change the UUID for your own reasons, you can use the following procedure to do so. 1. Backup all of your current LDOMs configuration. How to save LDOM configuration and restore from xml file 2. Switch to the "factory-default" configuration : primary-domain # ldm set-config factory-default 3. Gracefully shut … [Read more...] about Oracle VM Server for SPARC (Ldoms) : How to Change Primary/Control Domain’s UUID
LDOMs
LDOMs troubleshooting : guest and control domains can not talk to each other but can talk with anyone else on the network
One of the common mistakes done while configuring the guest LDOMs for the first time is - to not configure control domain for inter domain communications. In this case the control domain and guest ldoms can talk to everyone on the network but not to each other. There are 2 scenarios: 1. If one just want guest domains to communicate with the outside world then one should directly plumb up the switch vsw's along with the primary domain's network interface used to create those vsws (In our … [Read more...] about LDOMs troubleshooting : guest and control domains can not talk to each other but can talk with anyone else on the network
How to Collect a Forced Crash Dump of a Hanging Solaris Guest LDom
A Solaris system panics when it encounters an unrecoverable software or hardware error. When a panic occurs, it saves data about the state of the system and then reboots. A crash dump is created so that an Oracle engineer can determine the reason for the panic. The post describes a manual way to generate a crash dump in case of a LDOM. From Control domain A panic signal can be sent to guest ldom (e.g. ldom01) from the control domain. control-domain # ldm panic/panic-domain ldom01 From … [Read more...] about How to Collect a Forced Crash Dump of a Hanging Solaris Guest LDom
Solaris 11 : Increasing the size of a vdisk in LDom ( with backend device as ZFS volume )
LDom supports a number of possible other devices to be exported by the virtual disk server as a virtual disk to the guest domain. You can export a physical disk, disk slice, volumes, or file as a block device. The following procedure is based on a setup of ZVOLs for underlying backend device on primary domain. The basic steps would work for other kinds of devices as well. Assumptions: - Guest domain is running Solaris 11 - underlying device for the vdisk on primary is a zvol - filesystem … [Read more...] about Solaris 11 : Increasing the size of a vdisk in LDom ( with backend device as ZFS volume )
The Ultimate LDOMs troubleshooting guide
Most of the LDOM issues can be easily resolved by looking at the error message. Below are some of the most commonly faced LDOM issues and basic troubleshooting tips to resolve them. 1. Unable to create LDom 2. Unable to install LDom 3. Unable to configure LDom 4. Unable to bind LDom 5. Unable to connect to LDom How to verify if LDom services are started Below are two basic services needs to be running on the Primary domain (aka Control domain) for the ldom to start/work properly. 1. … [Read more...] about The Ultimate LDOMs troubleshooting guide
LDOMs (OVM for SPARC) Command line reference [cheat sheet]
Display Default LDOM services PurposeCommand Check ldom manager (ldmd)# svcs ldmd Check vntsd is running# svcs vntsd Check Default Services are running# ldm list-services primary Check ldm software# ldm -V check ldoms manager package in Solaris 11# pkg info ldomsmanager Creating Default LDOM services PurposeCommand add virtual console concentrator (vcc)# ldm add-vcc port-range=5000-5100 primary-vcc0 primary add virtual network switch (vsw)# ldm add-vsw net-dev=net0 … [Read more...] about LDOMs (OVM for SPARC) Command line reference [cheat sheet]
OVM for SPARC (LDOMs) : Troubleshooting console issues
Basics In a Logical Domains environment, console I/O from all domains, except the primary domain, is redirected to a service domain running the virtual console concentrator (vcc) and virtual network terminal server (vntsd) services, instead of the systems controller. The virtual console concentrator service functions as a concentrator for all domains, console traffic, and interfaces with the virtual network terminal server daemon and exports access to each console through a UNIX socket. … [Read more...] about OVM for SPARC (LDOMs) : Troubleshooting console issues
How to assign CPU/Memory/MAU resources to Guest LDOMs [OVM for SPARC]
The CPU, Memory and MAU resources can be added/removed dynamically to/from the guest LDOMs. Before adding the resources to guest LDOMs make sure you check the available resources in the primary domain : # ldm ls -o memory # ldm ls -o cpu # ldm ls -o mau Resources and their meanings The various resources and their meanings : AbbreviationNamePurpose VCPUvirtual CPUEach thread of a T series CPU acts as a virtual CPU MAUMathematical arithmetic unitEach core of T series CPU will have a … [Read more...] about How to assign CPU/Memory/MAU resources to Guest LDOMs [OVM for SPARC]
How to add/remove vdisk to/from Guest LDOMS online
Prerequisites In order to add vdisk online to a guest LDOM, the SMF service svc:/platform/sun4v/drd must be online in Guest LDOM : ldom01 # svcs drd STATE STIME FMRI online Feb_12 svc:/platform/sun4v/drd:default 1. Adding ZFS volume primary # zpool list NAME SIZE ALLOC FREE CAP DEDUP HEALTH ALTROOT ldom 86.5G 14.6G 71.9G 16% 1.00x ONLINE - rpool 136G 20.5G 115G 15% 1.00x ONLINE - primary # zfs create -V 5G ldom/disk2 primary # ldm add-vdsdev /dev/zvol/dsk/ldom/disk2 … [Read more...] about How to add/remove vdisk to/from Guest LDOMS online
How to rename a LDOM (OVM for SPARC)
In some rare situations you may get a request to change the name of the LDOM. This can be done in 2 ways. 1. Using live migration (can be done online) 2. By editing XML constraints file (requires downtime) Using live migration feature (online) In this case we migrate the guest LDOM to another machine and then again migrate it to the original machine with the new name. source-machine # ldm migrate oldname destination-machine destination-machine # ldm migrate oldname … [Read more...] about How to rename a LDOM (OVM for SPARC)