Mirantis Contributions to Kubernetes Ecosystem
1 like1,440 views
We're really happy to say that today we made the first meetup about Kubernetes in Russia! Thanks to all speakers and guests! Join us: https://twitter.com/kubernetesMSK
Ad
More Related Content
What's hot (20)
Viewers also liked (20)
Ad
Similar to Mirantis Contributions to Kubernetes Ecosystem (20)
![[Global logic] container runtimes and kubernetes](https://cdn.slidesharecdn.com/ss_thumbnails/globallogiccontainerruntimesandkubernetes-200910061008-thumbnail.jpg?width=560&fit=bounds)
Ad
Recently uploaded (20)
Mirantis Contributions to Kubernetes Ecosystem
- 1. Copyright © 2017 Mirantis, Inc. All rights reserved Contributions to Kubernetes Ecosystem Moscow Kubernetes Meetup 15.02.2017
- 2. 2017 | www.mirantis.com ● Why we’re getting involved in Kubernetes community? ○ Containers and Kubernetes are the future ○ Need to improve the state of Kubernetes on Bare Metal ○ Our customers want Kubernetes ○ Open contribution process ■ Much more meritocratic approach then in case of Docker Swarm or Mesos ● It started with Kubernetes on OpenStack via Murano The beginning of the story
- 3. 2017 | www.mirantis.com ● Fixing bugs, writing tests ● Participating in SIG and Community meetings ● Helping with project management ● Trying to add features we need Getting started with participating in k8s community
- 4. 2017 | www.mirantis.com ● Lack of reviewers ● Complicated discussions about new functionality ○ DaemonSet upgrades and anti-affinity ○ Multiple runtimes in Kubelet ○ Node evacuation / maintenance (partially in) ○ ConfigMap templates (rejected) ● It’s hard to land XXL patches in general ● The upstream wants to keep the core small ○ They want Kubernetes to be “the Linux kernel of distributed systems” Problems with working upstream
- 5. 2017 | www.mirantis.com ● Third Party Resources ● Container Runtime Interface ● External controllers that connect to apiserver ● Provide external tooling around kubernetes, including one used for cluster setup Extending Kubernetes without changing the core
- 6. 2017 | www.mirantis.com ● k8s-AppController: managing complex deployments ● k8s-externalipcontroller: external IP support for bare metal k8s clusters ● Kargo: setting up a Kubernetes cluster ○ It was not Mirantis project in the beginning, but as of now it’s mostly ours ● Virtlet: running VM workloads on Kubernetes clusters Mirantis projects belonging to k8s ecosystem
- 7. 2017 | www.mirantis.com ● kubeadm-dind-cluster: running multinode development clusters locally using Docker-in-Docker ● We didn’t stop being active in k8s core ○ we continue fixing bugs ○ also adding new features, e.g. for example, we’re working on DaemonSet upgrades ● We lead SIG On-Prem, SIG-OpenStack and SIG-PM ● Mirantis is a member of CNCF Mirantis projects belonging to k8s ecosystem
- 8. 2017 | www.mirantis.com ● The very initial purpose of k8s was mostly running “cattle” workloads ● Support for stateful workloads is improving over time ○ For instance, there’s support for PVs, StatefulSets, init containers etc. ● Defining dependencies between Kubernetes objects is hard ○ E.g. a web app pod may need to wait for its database to become ready. This may be a problem for legacy apps AppController: managing complex deployments
- 9. 2017 | www.mirantis.com AppController: managing complex deployments Kubernetes cluster AppController pod ThirdPartyResources Resource Definitions Dependencies Kubernetes Objects Kubectl (operator) Creates Extends API Creates Creates Creates when dependencies are met Reads Starts Retrieves status
- 10. 2017 | www.mirantis.com ● AppController represents k8s objects and their dependencies as TPRs ● k8s objects are created when their dependencies are satisfied ○ E.g. pod can depend on a service or a job that needs to be complete before the pod is created ○ Objects can depend on objects that are created by AppController or pre-existing k8s objects ● Helm integration is WiP ● Application Lifecycle Management (planned) AppController: managing complex deployments
- 11. 2017 | www.mirantis.com ● Ansible-based Kubernetes installer ● Supports AWS, GCE, Azure, OpenStack and BM ● Supports HA ● Flexible deployment options ○ A possibility to choose network plugin, load balancer, rkt support for core services etc. ● Support most popular Linux distributions ● The project has extensive CI setup ● Battle-tested on Scale Lab (up to 1000 nodes) ● There are kubeadm integration plans Kargo: setup a Kubernetes cluster
- 12. 2017 | www.mirantis.com ● Some legacy applications can’t be easily containerized ○ Substantial effort may be necessary for the transition, there can be licensing problems, there’s need for extra isolation and so on ● Virtlet runs VMs as Pods, supports QCOW2 images ● VMs can communicate with other Pods and access cluster services Virtlet: running VM workloads on k8s clusters
- 13. 2017 | www.mirantis.com Virtlet: running VM workloads on k8s clusters
- 14. 2017 | www.mirantis.com ● The implementation is based on Container Runtime Interface ○ CRI is also being used by cri-o, hyper, rkt ○ It will be also be used for Docker in Kubernetes soon ● We’re making it easy to install Virtlet on k8s clusters ○ It can run as a DaemonSet and still avoid chicken-and-egg problem thanks to multiple runtime support provided by CRI Proxy ● “Futuristic” use case: running Unikernel applications on Kubernetes cluster Virtlet: running VM workloads on k8s clusters
- 15. 2017 | www.mirantis.com ● We will be speaking about more of our projects on following meetups ● Questions? Thanks for your attention!