August 2024

Kubernetes

Kubernetes: ClusterIP

The ClusterIP is one of the three services in Kubernetes. When creating a manifest file in yaml format if the kind is service, and no type is mentioned, Kubernetes assumes that it will be ClusterIP by default. Let us…


Kubernetes

Kubernetes: Service : NodePort

The NodePort is one of the three services in Kubernetes. When a pod is deployed with a container, the worker node in which the pod gets deployed has an IP accessible from the master node, etc and…



postgresql

PostgreSQL: Basic commands

We will use a CentOS server to install PostgreSQL. The below command installs the PostgreSQL server. [root@SHIJU-TEST-PGSQL-01 ~]# dnf install postgresql15-server -y [root@SHIJU-TEST-PGSQL-01 ~]# postgresql-setup initdb [root@SHIJU-TEST-PGSQL-01 ~]# systemctl start postgresql [root@SHIJU-TEST-PGSQL-01 ~]# systemctl status…



Kubernetes

Kubernetes: Apps and pods

A Pod is the smallest deployable units of computing in a Kubernetes environment. A pod can host just one application (container) or several. Let us see if there are any pods running in the default…


Kubernetes

Kubernetes: NameSpace

The namespaces in Kubernetes provides a way for separating groups of resources hosted within a single cluster. While the default namespace where all the pods and applications get hosted is in the “default” namespace, the…


Kubernetes

Kubernetes: Basic commands

Once the installation of Kubernetes cluster is competed, let us go with the basic commands. The below command lists the pods running on the cluster. Remember that there are several services used by Kubernetes already…