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| − | '''[[wikipedia:Kubernetes|Kubernetes]]''' ( | + | '''[[wikipedia:Kubernetes|Kubernetes]]''' (commonly stylized as K8s[3]) is an open-source [[Container-Orchestration]] system for automating deployment, autoscaling (based on CPU, memory<ref>https://blog.powerupcloud.com/autoscaling-based-on-cpu-memory-in-kubernetes-part-ii-fe2e495bddd4</ref> or custom metrics<ref>https://docs.bitnami.com/kubernetes/how-to/configure-autoscaling-custom-metrics/</ref>) and management of containerized applications.[4] It works with a range of container tools, including '''[[Docker]]'''. |
Kubernetes objects, concepts or subsystems: | Kubernetes objects, concepts or subsystems: | ||
| − | * [[Containers]], [[Pods]], [[ | + | * [[Containers]], [[Pods]], [[Volumes]] |
| − | * [[Persistent Volumes]] subsystem provides an | + | * [[Persistent Volumes]] subsystem provides an API for users and administrators that abstracts details of how storage is provided from how it is consumed |
| − | * [[ | + | * [[namespaces]] |
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== Installation == | == Installation == | ||
| − | See: [[Kubernetes installation]] and [[Kubernetes changelog | + | See: [[Kubernetes installation]] and [[Kubernetes changelog]]. |
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== Microk8s == | == Microk8s == | ||
| − | + | MicroK8s single node Kubernetes solution available since December 2018<ref>https://snapcraft.io/blog/canonical-launches-microk8s-deploy-kubernetes-in-seconds</ref> | |
* Installation: | * Installation: | ||
| − | ** <code> | + | ** <code>snap install microk8s</code> |
** <code>snap install microk8s --classic</code> | ** <code>snap install microk8s --classic</code> | ||
| − | == | + | == minikube == |
| + | <code>brew cask install minikube</code><ref>https://github.com/kubernetes/minikube</ref> | ||
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| + | == Kubernetes Log files <ref>https://kubernetes.io/docs/tasks/debug-application-cluster/debug-cluster/</ref>== | ||
| + | Master | ||
| + | * <code>/var/log/kube-apiserver.log</code> - API Server, responsible for serving the API | ||
| + | * <code>/var/log/kube-scheduler.log</code> - Scheduler, responsible for making scheduling decisions | ||
| + | * <code>/var/log/kube-controller-manager.log</code> - Controller that manages replication controllers | ||
| + | * [[etcd]] | ||
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| + | Worker Nodes | ||
| + | * <code>/var/log/kubelet.log</code> - Kubelet, responsible for running containers on the node | ||
| + | * <code>/var/log/kube-proxy.log</code> - Kube Proxy, responsible for service load balancing | ||
== Kubernetes Ports == | == Kubernetes Ports == | ||
| − | * | + | * Kubernetes API: TCP 6443 <ref>https://kubernetes.io/docs/reference/access-authn-authz/controlling-access/</ref> |
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See also [[OpenShift]] port requeriments: https://docs.openshift.com/container-platform/4.2/installing/installing_bare_metal/installing-bare-metal.html | See also [[OpenShift]] port requeriments: https://docs.openshift.com/container-platform/4.2/installing/installing_bare_metal/installing-bare-metal.html | ||
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== Activities == | == Activities == | ||
| − | * Read [[Kubernetes changelog]] | + | * Read [[Kubernetes changelog]]: https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG.md |
* Read the History of Kubernetes: https://blog.risingstack.com/the-history-of-kubernetes/ | * Read the History of Kubernetes: https://blog.risingstack.com/the-history-of-kubernetes/ | ||
* Read wikitech documentation: https://wikitech.wikimedia.org/wiki/Portal:Toolforge/Admin/Kubernetes | * Read wikitech documentation: https://wikitech.wikimedia.org/wiki/Portal:Toolforge/Admin/Kubernetes | ||
* Read Kubernetes [[Storage]] documentation: https://kubernetes.io/docs/concepts/storage/ and types of [[/Volumes/]] supported. | * Read Kubernetes [[Storage]] documentation: https://kubernetes.io/docs/concepts/storage/ and types of [[/Volumes/]] supported. | ||
* Review Wikipedia [[Kubernetes]] [[Grafana]] statistics: https://grafana.wikimedia.org/d/G8zPL7-Wz/kubernetes-node?orgId=1&var-dc=eqiad%20prometheus%2Fk8s&var-instance=kubernetes1002.eqiad.wmnet | * Review Wikipedia [[Kubernetes]] [[Grafana]] statistics: https://grafana.wikimedia.org/d/G8zPL7-Wz/kubernetes-node?orgId=1&var-dc=eqiad%20prometheus%2Fk8s&var-instance=kubernetes1002.eqiad.wmnet | ||
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== Kubernetes Cloud Service Providers == | == Kubernetes Cloud Service Providers == | ||
| − | + | Kubernetes is offered as a service on multiple Cloud computing#Public cloud|public clouds, including [[Amazon Web Services]] ([[DevOps/Kubernetes/EKS|EKS]])<ref>https://aws.amazon.com/blogs/aws/amazon-eks-now-generally-available/</ref> (since June 2018 in the US East (N. Virginia) and US West (Oregon) Regions), [[Microsoft Azure]] (AKS) since october 2017,<ref>https://azure.microsoft.com/fr-fr/blog/introducing-azure-container-service-aks-managed-kubernetes-and-azure-container-registry-geo-replication/</ref> [[DigitalOcean]]<ref>https://www.digitalocean.com/docs/kubernetes/overview/</ref> (since May 2018),<ref>https://techcrunch.com/2018/05/02/digital-ocean-launches-its-container-platform/</ref><ref>https://tech.economictimes.indiatimes.com/news/corporate/digitalocean-launches-kubernetes-based-container-service/64007829</ref> [[Google Kubernetes Engine]] (GKE) in [[Google Cloud Platform]]<ref>https://cloud.google.com/kubernetes-engine/</ref> (at least since November 2014),<ref>https://cloud.google.com/kubernetes-engine/release-notes</ref> [[IBM cloud computing|IBM Cloud]] <ref>https://www.ibm.com/cloud/container-service</ref>, [[Alibaba Cloud]] <ref>https://www.alibabacloud.com/product/kubernetes</ref>, Mail.Ru Cloud Solutions (since May 2018)<ref>{{Cite web|url=https://mcs.mail.ru/en/iaas/|title=MCS – Mail.Ru Cloud Solutions|website=mcs.mail.ru|language=ru|access-date=2018-12-05}}</ref>. For a more comprehensive list you can check https://kubernetes.io/docs/setup/pick-right-solution/#hosted-solutions. Most of them if not all requires a valid credit card. | |
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| − | == | + | == Kubernetes Timeline == |
| − | * [[ | + | * 12/2018 [[Microk8s]] released<ref>https://snapcraft.io/blog/canonical-launches-microk8s-deploy-kubernetes-in-seconds</ref> |
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== See also == | == See also == | ||
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* {{k8s}} | * {{k8s}} | ||
| − | * | + | * [[microk8s]] (runs a single-node Kubernetes cluster inside a VM on your laptop, also distributed like [[snap]] by Canonical) |
| + | * [[minikube]] <code>brew cask install minikube</code> | ||
| + | * [[etcd]] distributed key/value store used by Kubernetes | ||
| + | * [[/Pod/]] (aggrupation of containers) | ||
| + | * [[Peloton]], a unified resource scheduler developed by Uber <ref>https://eng.uber.com/open-sourcing-peloton/</ref> | ||
| + | * [[/Nomad/]] container orchestration tool developed by [[HashiCorp]] | ||
| + | * [[/Helm/]] package manager for Kubernetes | ||
| + | * [[Openshift]] Kubernetes based platform | ||
| + | * [[Mesos]] | ||
| + | * [[Anthos]] and [[GCP]] | ||
| + | [[Category:Cloud computing]] | ||
| + | [[Category:Software development]] | ||
| + | [[Category:Server administration]] | ||
[[Category:Linux containers]] | [[Category:Linux containers]] | ||
[[Category:Kubernetes]] | [[Category:Kubernetes]] | ||
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