Kubernetes is an Orchestration engine for automating deployment, scaling, and management of container. Its a Open Source source project started by Google and its now currently hosted by Cloud Native Computing Foundation. In this article I will walk-through the installation of Kubernetes Cluster on CentOS7. For the purpose of demonstration I will using three different […]
When running a docker run or docker service create you may get the error message as “Error creating external connectivity network. Failed to setup IP tables” To fix this error make sure firewalld service is started and enabled
Ansible make it very easy to register the Redhat system to the Redhat Customer portal using the redhat_subscription module. One of the method is to use define the pool ID of the subscription against which the system needs to be registered & consumed.
If Ansible is used in the infrastructure for automation then its necessary to enable passwordless login to the account which is being used to execute the commands on the target host. In order to do this on RHEL machine the /etc/sudoers files needs to be updated. The section which has to be updated is as […]
If you are tasked to create multiple users on remote users and copy the ssh keys to the remote servers. Ansible would come very handy to accomplish the tasks: The following Ansible playbook is based on the assumption: Users are not present on the remote servers SSK Keys are already create on the Ansible Control […]
Lately I have been working on rolling out Ansible across the Infrastructure. One of the step is to set up SSH key-based authentication, which would allow to set ask_pass = false. In order to accomplish this I have used the Ansible module authorized_key module which allows to add SSH authorized keys for particular user accounts. […]
Ansible is getting very popular for every department of IT operations. There are multiple ways to edit the plaoybook, but one of my favorite is the vim editor. Indentation is very important while working with Ansible Playbook, myself ran around while editing the playbook, so i though would need to document it around for people […]
Last week I came across a posting about Hyperconverged Infrastructure Professional certification via LinkedIn. When I started looking around for more information came to know the training & certification is provided by Hyperconverged.Org which is founded by some of the Industry super starts. One among them is our own David M Davis, I have grown […]