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LINUX CONTAINERS

LINUX CONTAINERS What is Linux Container:  Linux containers have different approach than the Virtualization technology. Simply we can say this is OS level Virtualization, which means all containers run on top of one linux operating system.  We can start containers on a hardware running machine or inside of running virtual machine. Each container run's as a fully isolated operating sysem. In container virtualization rather than having an entire Operating System guest OS, containers isolate the guest but do not virtualize the hardware. For running containers one needs a patched kernel and user tools, the kernel provides process isolation and performs resource management. Thus all containers are running under the same kernel but they still have their own file system, processes, memory etc. Linux based containers mainly involved with two concepts: 1. Namespaces 2. Cgroups ( Controll Groups) There are total 6 types of Namespaces: 1. PID Na...
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Canonical Kubernetes Platform

Recently,  Canonical has announce the release of the Canonical Kubernetes Platform version 1.32, a robust and user-friendly solution for seamless cluster creation and management. This platform is designed to simplify the deployment and maintenance of containerized workloads, making it an ideal choice for both developers and enterprises. Here are some of the attracting features of this Platform.  ZeroOps with Built-in Essentials:  The platform comes pre-configured with critical components such as networking, DNS, metrics server, local storage, ingress, gateway, and load balancer, enabling immediate productivity post-installation. Simplified Installation and Maintenance:   Leveraging snap packages, the installation process is straightforward, and automated patch upgrades enhance security without manual intervention. Effortless Scalability:  Adding new nodes is seamless, and achieving high availability requires minimal effort, ensuring your infrastructure sca...
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Docker Container Management from Cockpit

Cockpit can manage containers via docker. This functionality is present in the Cockpit docker package. Cockpit communicates with docker via its API via the /var/run/docker.sock unix socket. The docker API is root equivalent, and on a properly configured system, only root can access the docker API. If the currently logged in user is not root then Cockpit will try to escalate the user’s privileges via Polkit or sudo before connecting to the socket. Alternatively, we can create a docker Unix group. Anyone in that docker group can then access the docker API, and gain root privileges on the system. [root@rhel8 ~] #  yum install cockpit-docker    -y  Once the package installed then "containers" section would be added in the dashboard and we can manage the containers and images from the console. We can search or pull an image from docker hub just by searching with the keyword like nginx centos.   Once the Image download...
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