In Google Kubernetes Engine, Nodes are Google Complete Engine (Virtual Machiens). Pods run inside Nodes. A Kubernetes cluster can contain multiple node pools. A node pool contain multiple nodes of same instance type. To create a Node Pool in Google Kubernetes Engine, run gcloud container node-pools create POOL_NAME \ –cluster=CLUSER_NAME \ –machine-type=e2-standard-2 \ –num-nodes=1 \ … Read more
To scale a deploymenet in Kubernetes using kubectl, run kubectl scale deployment DEPLOYMENT_NAME –replicas=2 Example kubectl scale deployment my-frontend –replicas=2 See Kubernetes
Before you can run kubectl commands on Google Kubernetes Engine, you need to get credentials, this is done with command gcloud container clusters get-credentials CLUSER_NAME_HERE –zone ZONE_HERE To use gcloud commands, you need to login to google cloud first using command gcloud auth login See Google Kubernetes Engine
Minikube is an easy-to-use Kubernetes that run on one machine. It is used for testing purposes. https://github.com/kubernetes/minikube Install Minikube with docker driver on Ubuntu To install minikube, run wget https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 sudo mv minikube-linux-amd64 /usr/local/bin/minikube sudo chmod 755 /usr/local/bin/minikube Before you can start minikube, you need to install VirtualBox, this can be done with the command … Read more
To install MySQL server in Kubernetes, run helm install stable/mysql Once install is completed, you will get something like NOTES: MySQL can be accessed via port 3306 on the following DNS name from within your cluster: incendiary-monkey-mysql.default.svc.cluster.local To get your root password run: MYSQL_ROOT_PASSWORD=$(kubectl get secret –namespace default incendiary-monkey-mysql -o jsonpath=”{.data.mysql-root-password}” | base64 –decode; echo) … Read more
To install WordPress in Kubernetes, you need to install helm package manager. Now run helm install stable/wordpress After the helm chart is run, you will get commands to get login for WordPress admin area. Here is services it create boby@sok-01:~$ kubectl get service NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE kubernetes ClusterIP 10.39.240.1 443/TCP 34m whopping-labradoodle-mariadb … Read more
Helm is Package Manager for Kubernetes. Helm packages are called “Charts”. Charts allow you to deploy various software on Kubernetes cluster. https://helm.sh/ To install helm, run curl https://raw.githubusercontent.com/kubernetes/helm/master/scripts/get > get_helm.sh bash get_helm.sh If you are on Ubuntu, you can install from snap snap install helm –classic To update helm repos, run helm repo update To … Read more
Create Kubernetes cluser using gcloud Google Kubernetes Engine get credentials Google Kubernetes Engine Node Pools To list all Kubernetes clusters, run gcloud container clusters list To create a Kubernetes cluster, run gcloud container clusters create CLUSTER_NAME Get credential for kubectl gcloud container clusters get-credentials CLUSTER_NAME List all nodes (GCP instances) kubectl get nodes
Login to gcloud with gcloud auth login Set default region gcloud config set compute/zone us-central1-a To create a cluser, run gcloud container clusters create CLUSTER-NAME To create a cluster with 2 nodes, run gcloud container clusters create CLUSTER-NAME –num-nodes 2 To specify compute engine type during cluster creation, run gcloud container clusters create CLUSTER-NAME –num-nodes … Read more
Easy Kubernetes setup on Ubuntu with microk8s Kubeapps https://kubernetes.io/docs/tutorials/hello-minikube/ Install Minikube in Ubuntu kubectl kubectl Kubernetes scale a deployment Google Kubernetes Engine Create Kubernetes cluser using gcloud Google Kubernetes Engine Create Kubernetes cluser using gcloud Free Online Labs https://labs.play-with-k8s.com Learn Kubernetes using Interactive Browser-Based Scenarios
Kubeapps allows you to run bitnami applications in Kubernetes cluster.
To install master on Ubuntu 16.04, lets start by installing docker. apt-get update apt-get install -y docker.io Now install kubeadm apt-get update && apt-get install -y apt-transport-https curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add – cat