Have you got the package conflict error while installing the specific package on RHEL 7 /CentOS 7? Frequently, “fwupdate-efi” package conflicts with the “grub2-common” package in RHEL 7 / CentOS 7 environment. This article will provide the step by step procedure to resolve package conflict errors. In general, if you get such error, you must […]
Kubernetes – Overview of Pod and Service
This article will give a high-level view of Kubernetes Pods and Services. Kubernetes runs containers but always inside the pods. You can’t directly deploy container without pods in Kubernetes. The shared context of the pod is a set of Linux namespaces, cgroups, and other facets of isolation. Docker container does the same but the application gets the further sub-isolation since […]
Ansible – Reboot Server Using Playbook and Wait for come back
Ansible is a simple configuration management tool. Open source community keeps trying to make the code much simpler on the newer version. Prior to Ansible engine 2.7, To reboot the target hosts, we need to define a block of code to reboot the server and wait until the hosts to come back. Most of the time. making the configuration changes or installing […]
How to pass variable from one playbook to another playbook ? Ansible
In Ansible, passing a variable from one playbook to another playbook is not a straight forward. (If the target hosts are different). We might need to get the variable value from one host and use that value against another host in some cases. This article will provide a solution to overcome this kind of tricky situation in Ansible. Here are the scenarios […]
How Kubernetes works ? – Core Components and Architecture
Kubernetes is an open-source generic multi-container management software which offers deployment, scaling, descaling & load balancing. It’s an orchestrator for microservices applications. Kubernetes would make us see the whole data center as a computer. Kubernetes can manage any type of containers which follows OCI standards. ( Docker or Core OS’s rkt or any ). Kubernetes […]
What is Kubernetes – Good to Know – An Overview
Kubernetes is a leading container orchestration platform for automating application deployment, scaling, and management. Container brings a lot of scalability challenges. But Kubernetes can take over the challenges and lets you concentrate only on deployments. Its platform agnostic. Kubernetes is most often used to manage the Docker. But it can also work with any container […]
VMware vSphere – Build VM using Terraform – Cent OS/RHEL (Redhat Linux)
This article will provide step by step procedure for building “CentOS” /”Redhat Linux” Virtual Machine using Terraform tool on the VMware vSphere environment. Terraform is an excellent tool to build VM’s on VMware vSphere environment. Terraform doesn’t require any dedicated host. You could download an opensource/free version of Terraform on your laptop or desktop and […]
VMware Template Automation Using Packer – Redhat/CentOS
VMware template creation can be automated using packer. VMware Virtual Machine deployments are very faster because of the template based VM build. But due to rapid development and fast-paced Operating system releases, we might need to build multiple templates and keep it ready for deployment. A customer might ask different operating system release and you […]
Jenkins – Ansible – Configure Dynamic Inventory
Are you using Jenkins as front-end GUI for Ansible Automation? Have you ever tried the dynamic inventory in Jenkin’s Ansible plugin? Ansible Inventory can be created using the plugin’s dynamic inventory feature. This feature could be very useful when you want to pass hosts as user-defined input and that’s is not part any of the […]
Jenkins – Store Console Output in Linux Filesystem – Artifacts
How to store Jenkins job’s console output in another system? There are much opensource software is available to store the logs and retrieve logs in time. Jfrog is one of the most famous artifact solutions. Here, we will be using native Linux/Unix commands to pull the Jenkins logs and store it in local/NFS filesystem for […]