Adding Shared disk on KVM

Hello, In this very short post, I will share with you how to create a shared disk on KVM host ugliest way :). It is prerequisite for the next  post. In the next topic, I will share with you how to build a two-node cluster on RedHat. I will use latest version of CentOS6 for […]

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Removing and Rescanning SCSI Disk

Hi, Sometimes storage team needs to upgrade HBA and Storage. During that time some of the multipath may not active. In this circumstance, as a system administrator, It is safe to set the device offline manually instead of immediate disk path failure before any HBA and storage upgrade happen. multipath -ll mpathb (1IET 00010001) dm-2 […]

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Sending Mail

Hello, In this short post, I will share you simple ansible playbook to send mail. I wrote this playbook  informing Project Office and Clients about OS system updates. In order for that Ansible has a mail module. Only things we need to define smtp server, smtp server port, Subject, Mail body, sender and recipients. Example […]

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Multipath with iSCSi

Hi Folks! In this post, I will configure how to set-up iSCSI target and iSCSI initiator multipath way. Doing so we will be able to high available storage. Even though one links goes down other links kicks in and take over the mission. In this experiment I will be using two Linux CentOS6 systems and […]

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