Identifiers Ex: a=10 b='xyz' Here a And b are identifiers. Identifiers can start with _ or a-z or A-Z  & alphabet followed by number (0-9)  but not with 0-9 # Starting of python programing ''' Multy line comment bla bla bla and that it ''' print("This is very begging") a=10 b='xyz' print(a,b) _a = 50 … Continue reading Identifiers and Operators in python

What is POD? A point of delivery, or PoD, is "a module of network, compute, storage, and application components that work together to deliver networking services. An overlay network is a computer network that is built on top of another network. An overlay is a virtual network that is built on top of underlying network infrastructure. The purpose is to implement … Continue reading Pod Network

Add repo to pull required packages in all nodes cat << /etc/yum.repos.d/kubernetes.repo [kubernetes] name=Kubernetes baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-x86_64 enabled=1 gpgcheck=1 repo_gpgcheck=1 gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg EOF yum install kubeadm kubelet kubectl -y Installed: kubeadm.x86_64 0:1.13.4-0 kubectl.x86_64 0:1.13.4-0 kubelet.x86_64 0:1.13.4-0 Dependency Installed: conntrack-tools.x86_64 0:1.4.4-4.el7 cri-tools.x86_64 0:1.12.0-0 kubernetes-cni.x86_64 0:0.6.0-0 libnetfilter_cthelper.x86_64 0:1.0.0-9.el7 libnetfilter_cttimeout.x86_64 0:1.0.0-6.el7 libnetfilter_queue.x86_64 0:1.0.2-2.el7_2 socat.x86_64 0:1.7.3.2-2.el7 swapoff -a yum install docker … Continue reading Install kubernetes with kubeadm

Download required version of Helm wget https://storage.googleapis.com/kubernetes-helm/helm-v2.13.0-linux-amd64.tar.gz tar -zxvf helm-v2.13.0-linux-amd64.tar.gz mv linux-amd64/helm /usr/local/bin/helm [root@remoteuser ~]# helm The Kubernetes package manager To begin working with Helm, run the 'helm init' command: $ helm init This will install Tiller to your running Kubernetes cluster. It will also set up any necessary local configuration. Common actions from this … Continue reading Installing and working with helm

Replication of controllers Auto Scaling Load Balancing Rolling Update Logging Across components Monitoring Health Checks ServiceDiscovery Authentication.......   Kubernetes Architecture     Kube-Apiserver: The Kubernetes API server validates and configures data for the api objects which include pods, services, replicationcontrollers, and others. The API Server services REST operations and provides the frontend to the cluster’s … Continue reading What Kubernetes can resolve

Use google cloud shell for executing below commands  gcloud components install kubectl gcloud container clusters create demo123 \ --num-nodes=3 \ --machine-type=n1-standard-2 \ --zone=us-central1-b ... kubeconfig entry generated for demo123. NAME LOCATION MASTER_VERSION MASTER_IP MACHINE_TYPE NODE_VERSION NUM_NODES STATUS demo123 us-central1-b 1.11.7-gke.4 35.226.229.88 n1-standard-2 1.11.7-gke.4 3 RUNNING kubectl get nodes NAME STATUS ROLES AGE VERSION gke-demo123-default-pool-e76d0a68-0hkc Ready <none> … Continue reading create kubernetes cluster in gcp

gcloud function is similar to serverless concept   git clone https://github.com/GoogleCloudPlatform/nodejs-docs-samples.git Cloning into 'nodejs-docs-samples'... remote: Enumerating objects: 89, done. remote: Counting objects: 100% (89/89), done. remote: Compressing objects: 100% (87/87), done. remote: Total 13383 (delta 39), reused 2 (delta 0), pack-reused 13294 Receiving objects: 100% (13383/13383), 14.61 MiB | 2.31 MiB/s, done. Resolving deltas: 100% (8460/8460), … Continue reading cloud functions in gcp