Questions Regarding Taking Containers to Production

• We know that we can run our application inside a container, But if we want to go to live/production does containers offer me

  • Fault Tolerance: What happens when the host running the container goes down?
  • High Availability and Scaling: How to handle load during peak time for the applications
  • Manual Interventions: Do i need to scale the applications manually ?
  • New Updates: Every application will have a new releases with DevOps quite frequently, how do i update containers to the new versions without having downtime
  • Monitoring capabilities

• We need some kind of orchestration software around containers which will help us solve the above questions.

• That is what Kuberentes does.

• Kuberenetes (k8s) takes care of

  • Scaling requirements
  • failover
  • deployment options for zero downtime deployment

• K8s provides

  • Service discovery and load balancing
  • Storage Orchestration
  • Automated rollouts and rollbacks
  • Self Healing
  • Secret and configuration Management

• k8s is a platform that manages container-based appplications, their networking and storage components

• k8s allows us to focus on application workloads rather than underlying infra

• k8s provides a declarative approach to create deployments

• For more info Refer Here

• For understanding master and node components Refer Here

• Interactions b/w k8s components

Lab Setup

• We have already installed kubernetes using kubeadm
• Now we if we want to work with kuberenetes we will be using kubectl and Refer Here for its cheatsheet
• Lets setup autocompletion on kubectl

echo "source <(kubectl completion bash)" >> ~/.bashrc