Managing container and image data with Docker Volumes and Storage drivers Managing application data in running containers is one of the biggest challenges. We have to trade of between available volume types (and its associated storage drivers) with system performance. Volume’s contents exist outside the lifecycle of a given container. This is called data persistency. Below snapshot depicts the mechanism for persistent data in containers. Volumes are stored in a part of the host filesystem

Docker networking

Docker networking is one of the most crucial part to understand if you want to be master on docker. The concept is not that much complicated if you put your effort in right direction. It ease your life when you set up your container for talking to another container or expose externally. Docker engine interacts with Libnetwork which talks to one of the below high construct network drivers. Native Network Driver Native IPAM Driver Remote
TripleO – Openstack-on-Openstack: TripleO also known as Openstack-on-Openstack install openstack using openstack. This is an openstack deployment and management tool. This is a program for installing, updating and managing the openstack environment. In this program, there are two concepts – Undercloud and Overcloud. Undercloud : Undercloud is a simple, all-in-one openstack installation running on the physical machine. In the Triple O program, first the undercloud machine will be installed and configured with all-in-one single node
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Linux Interview Questions

1. What can you type at a command line to determine which shell you are using? $ echo $SHELL 2. What command is used to remove the password assigned to a group? $ gpasswd -r. 3. What are LVM1 and LVM2? LVM1 and LVM2 are the versions of LVM. LVM2 uses device mapper driver contained in 2.6 kernel version. LVM 1 was included in the 2.4 series kernels. 4. What command should you use to