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Container management with docker & kubernetes
- 1. CONTAINER MANAGEMENT WITH AZUREKUBERNETES SERVICE Kasun Rajapakse Technical Consultant Thakral One Pvt Ltd Twitter:- @kasunsjc
- 2. WHO AM I? MCSA : Cloud Platform, MCSE, MCT, AWS SAA/Dev/SysOps Work as Technical Consultant 4+ Experience in Cloud & Server Technology OMS, SCOM, AWS, Azure & Windows Server Blog- http://www.allaboutwindowssl.com/ Twitter : @kasunsjc LinkedIn : http://www.linkedin.com/in/kasunraj
- 3. WHAT IS CONTAINERS? •Compared to VMs, containers are much more lightweight • A container, on the other hand, is nothing more than a single isolated process running in the host OS, consuming only the resources that the app consumes and without the overhead of any additional processes • Containers, on the other hand, all perform system calls on the exact same kernel running in the host OS. • This single kernel is the only one performing x86 instructions on the host’s CPU
- 4. CONTAINERS CONT. Image:- Kubernetesin Action Marko Luksa
- 5. WHAT IS DOCKER? •Command line program and background deamon • Computer program that performs operating-system-level virtualization Running software in containers for isolation • Resource isolation features of the Linux kernel such as cgroups and kernel namespaces, and a union-capable file system such as OverlayFS and others • Provides a set of infrastructure components that simplify distributing Docker images
- 6. WHAT IS KUBERNETES(K8S) • It’s originally developed by Google for there internal purpose. • In 2014 Google introduced Kubernetes, an open-source system based on the experience gained through Borg, Omega, and other internal Google systems. • software system that allows you to easily deploy and manage containerized applications on top of it. • Helping developers focus on the core app features. • Helping ops teams achieve better resource utilization.
- 7. KUBERNETES ARCHITECTURE Image:- Kubernetesin Action Marko Luksa
- 8. AZURE KUBERNETES SERVICE(AKS) • It’s a managed service provide by Azure. • Easy to get start with enterprise scale container environment in minutes. • Can integrate with CI/CD and Source control • Taking away the management of master node (Managed) • Automated Kubernetes version upgrades and patching • Easy cluster scaling • Self-healing hosted control plane (masters) • Cost savings - pay only for running agent pool nodes
- 9. DEMO – CREATEAKS CLUSTER IN MINUTES
- 10. KUBERNETES RESOURCES • CronJobs • Daemon Sets • ReplicaController • Deployments • Jobs • Pods • Replica Sets • Services etc.
- 11. USAGE AND ADVANTAGEOF USING KUBERNETES • Moving from monolithic apps to microservices • Providing a consistent environment to applications • Moving to continuous delivery: DevOps and NoOps • Automatic binpacking • Self-healing • Horizontal scaling • Service discovery and load balancing • Automated rollouts and rollback • Secret and configuration management • Storage orchestration • Batch execution
- 12. PODS • Co-located groupof containers and represents the basic building block in Kubernetes. • It’s common for pods to contain only a single container. • A pod of containers allows you to run closely related processes together and provide them with (almost) the same environment as if they were all running in a single container, while keeping them somewhat isolated. This way, you get the best of both worlds
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- 14. REPLICA SETS/REPLICACONTROLER • Kubernetesresource that ensures its pods are always kept running. • It makes sure a pod (or multiple pod replicas) is always running by starting a new pod when an existing one goes missing. • When a cluster node fails, it creates replacement replicas for all the pods that were running on the failed node (those that were under the Replication-Controller’s control). • It enables easy horizontal scaling of pods—both manual and automatic • Uses Label selector to select pods.
- 15. REPLICA SETS/REPLICACONTROLER –CONT.… Image:-Kubernetes in Action Marko Luksa
- 16. DEMO – REPLICASETS
- 17. SERVICES • A resourceyou create to make a single, constant point of entry to a group of pods providing the same service. • Each service has an IP address and port that never change while the service exists. • External clients need to connect to the frontend pods without caring if there’s only a single web server or hundreds. • The frontend pods need to connect to the backend database. Because the database runs inside a pod, it may be moved around the cluster over time, causing its IP address to change. You don’t want to reconfigure the frontend pods every time the backend database is moved.
- 18. SERVICES–CONT.… Image:- Kubernetes in ActionMarko Luksa
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- 20. MONITORING KUBERNETES SERVICE •By the recent enhansment and announcement of container team we can monitor k8 nodes & different resources from azure portal. • We can use Operation Management Suite (OMS) container solution. • Using third party container monitoring tools. Eg :- cAdvisor, InfluxDB and Grafana • For the full list of compatible monitoring tools follow below link https://kubernetes.io/docs/tasks/debug-application-cluster/resource-usage-monitoring/
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- 23. CONTAINER OPTIONS INAZURE • Azure Container Service https://docs.microsoft.com/en-us/azure/container-service/ • Azure Container Instance https://docs.microsoft.com/en-us/azure/container-instances/ • Azure Kubernetes Service https://docs.microsoft.com/en-us/azure/aks/ • Azure Container Registry https://docs.microsoft.com/en-us/azure/container-registry/
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