Basics What are the different service group types ? Service groups can be one of the 3 type : 1. Failover - Service group runs on one system at a time. 2. Parallel - Service group runs on multiple systems simultaneously. 3. Hybrid - Used in replicated data clusters (disaster recovery setups). SG behaves as Failover within the local cluster and Parallel for the remote cluster. Where is the VCS main configuration file located ? The main.cf file contains the configuration of the entire … [Read more...] about The ultimate Veritas Cluster Server (VCS) interview questions
VCS
VCS cluster 5.1 LAB using VMware workstation : Installing VCS
Now comes the last step in this series to create a VCS LAB. We need to copy the installation media to one of the VMs. We would use shared folder feature of VMware workstation to copy the install media into the node geek01. To enable sharing goto VM > Settings . On the options tab select shared folders. Add the folder you want to share from the host machine. Note that sharing feature is enabled only when you install VMware tools into the guest VM. After you have shared the folder from host … [Read more...] about VCS cluster 5.1 LAB using VMware workstation : Installing VCS
VCS cluster 5.1 LAB using VMware workstation : Configuring openfiler
In the last post we have installed the openfiler virtual machine. Let us now configure the openfiler to assign iscsi LUNs to the two solaris 10 virtual machines. Login to the web interface using below credentials Management Interface: https://10.10.10.10:446 Administrator Username: openfiler Administrator Password: password Enabling iSCSI services and adding network Access configuration First step is to enable the iscsi target service. Enable the iSCSI target service and start it in the … [Read more...] about VCS cluster 5.1 LAB using VMware workstation : Configuring openfiler
VCS cluster 5.1 LAB using VMware workstation : Installing openfiler
To configure a shared storage for this setup we'll be using openfiler. We need to create an openfiler VM with 512 MB RAM and 3 Disks of 500 MB for I/O fencing. Also to install the openfiler OS we need a 10GB HDD. Click on the create new virtual machine icon from home screen to get started. Select typical configuration for this VM. Select the ISO for the openfiler. Select the operating system as Other and version as FeeBSD Set the name of the virtual machine as openfiler. … [Read more...] about VCS cluster 5.1 LAB using VMware workstation : Installing openfiler
VCS cluster 5.1 LAB using VMware workstation : Installing solaris
In the last part we went through the overall setup for this home LAB. Lets now dive into installing the two solaris virtual machines. Before we start creating the virtual machines, we need to setup the 2 networks (one for connecting the VMs from outside and one for openfiler storage). 192.168.1.0/255.255.255.0 - Connecting the VMs from outside 10.10.10.0/255.255.255.0 - To connect the Openfiler storage to the VMs For this click on Edit -> Virtual Network Editor Now you would see … [Read more...] about VCS cluster 5.1 LAB using VMware workstation : Installing solaris
VCS cluster 5.1 LAB using VMware workstation : The Setup
I always wanted to have my own VCS cluster LAB where I could do my RnD. Which is generally not possible in the production setup (off course !). So I decided to build this awesome home LAB with VMWare workstation on my laptop. Note : The software iSCSI software used for this setup does not support SCSI3 PGR feature which is required for configuring fencing. As this is a test LAB, we can ignore this shortcoming. The vxfentsthdw command to test the disk for SCSI3 PGR capability would fail for the … [Read more...] about VCS cluster 5.1 LAB using VMware workstation : The Setup
How to add/remove Low/High priority LLT links in VCS online
It’s sometimes a requirement to add a new high or low priority link to the existing LLT links. This can be done online without affecting any of the cluster services. There are 2 ways to do the same online (without offlining any service group). 1. Method 1 (using lltconfig) 2. Method 2 (editing /etc/llttab and restarting VCS using -force option) 1. Method 1 (using lltconfig) Add/Remove High Priority LLT link To add a high priority LLT link online (without restarting LLT) : # lltconfig … [Read more...] about How to add/remove Low/High priority LLT links in VCS online
How to add a node to an active VCS cluster
There might be a requirement to add a new node to an existing VCS cluster to increase the cluster capacity. Another situation in which there is a need to add a new node is hardware upgrade of the nodes. In this post, we will be adding 3rd node (node03) to the existing 2 node cluster. Install and configure VCS on the new node Install VCS cluster software to node03. When asked to configure it, select "no". After you have finished installing the vcs software run installsf from the software … [Read more...] about How to add a node to an active VCS cluster
How to remove a node from an active VCS cluster
There might be situations when you want to remove a node from cluster. We can do this online without interrupting the cluster services. For this you should have sufficient resources to handle the load of the node which you are going to remove from the cluster. We will be removing node03 with service group SG03 running on it. Freeze node and halt VCS Freeze the node03 and stop VCS on that node by evacuating it, so that service group SG03 will switch over to either node01 or node02. # … [Read more...] about How to remove a node from an active VCS cluster
How to configure VCS I/O fencing – Command line and installer utility
I/O fencing is one of the very important feature of VCS and provides user the data integrity required. Let us now see how we can configure fencing in a VCS setup. This setup assumes that you already have a VCS setup up and running without fencing. Fencing can be configured in 2 ways - By using the installer script and by using command line. Before configuring the disks for fencing you can run a test to confirm whether they are SCSI3-PGR compatible disks. The vxfentsthdw script guides you … [Read more...] about How to configure VCS I/O fencing – Command line and installer utility