Difference between revisions of "Kubernetes API Resources Concepts"

From NovaOrdis Knowledge Base
Jump to: navigation, search
(DNS Label Names)
(Names)
 
(2 intermediate revisions by the same user not shown)
Line 83: Line 83:
 
==DNS Subdomain Names==
 
==DNS Subdomain Names==
 
{{External|https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-subdomain-names}}
 
{{External|https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-subdomain-names}}
Most resource types require a name that can be used as a DNS subdomain name as defined in [https://tools.ietf.org/html/rfc1123 RFC 1123]:
+
Most resource types require a name that can be used as a [[DNS_Concepts#DNS_Subdomain_Name|DNS subdomain name]] as defined in [https://tools.ietf.org/html/rfc1123 RFC 1123]:
* contain no more than 253 characters
+
* contains no more than 253 characters
* contain only lowercase alphanumeric characters, '-' or '.'
+
* contains only lowercase alphanumeric characters, '-' or '.'
* start with an alphanumeric character
+
* starts with an alphanumeric character
* end with an alphanumeric character
+
* ends with an alphanumeric character
  
 
==DNS Label Names==
 
==DNS Label Names==
 
{{External|https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names}}
 
{{External|https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names}}
Some resource types require that their name follows the DNS label standard, as defined in [https://tools.ietf.org/html/rfc1123 RFC 1123]:
+
Some resource types require that their name follows the [[DNS_Concepts#DNS_Label_Name|DNS label]] standard, as defined in [https://tools.ietf.org/html/rfc1123 RFC 1123]:
* contain at most 63 characters
+
* contains at most 63 characters
* contain only lowercase alphanumeric characters or '-'
+
* contains only lowercase alphanumeric characters or '-'
* start with an alphanumeric character
+
* starts with an alphanumeric character
* end with an alphanumeric character
+
* ends with an alphanumeric character
  
 
==Path Segment Names==
 
==Path Segment Names==

Latest revision as of 18:37, 26 June 2020

External

Internal

API Reference

https://kubernetes.io/docs/reference/generated/kubernetes-api/v1.14/

API Resources

The full list of API resources (primitives, API objects) available to interact with in Kubernetes is generated by:

kubectl api-resources
NAME                              SHORTNAMES   APIGROUP                       NAMESPACED   KIND
bindings                                       core API group                 true         Binding
componentstatuses                 cs                                          false        ComponentStatus
configmaps                        cm                                          true         ConfigMap
endpoints                         ep                                          true         Endpoints
events                            ev                                          true         Event
limitranges                       limits                                      true         LimitRange
namespaces                        ns                                          false        Namespace
nodes                             no                                          false        Node
persistentvolumeclaims            pvc                                         true         PersistentVolumeClaim
persistentvolumes                 pv                                          false        PersistentVolume
pods                              po                                          true         Pod
podtemplates                                                                  true         PodTemplate
replicationcontrollers            rc                                          true         ReplicationController
resourcequotas                    quota                                       true         ResourceQuota
secrets                                                                       true         Secret
serviceaccounts                   sa                                          true         ServiceAccount
services                          svc          core API group                 true         Service
mutatingwebhookconfigurations                  admissionregistration.k8s.io   false        MutatingWebhookConfiguration
validatingwebhookconfigurations                admissionregistration.k8s.io   false        ValidatingWebhookConfiguration
customresourcedefinitions         crd,crds     apiextensions.k8s.io           false        CustomResourceDefinition
apiservices                                    apiregistration.k8s.io         false        APIService
controllerrevisions                            apps                           true         ControllerRevision
daemonsets                        ds           apps                           true         DaemonSet
deployments                       deploy       apps                           true         Deployment
replicasets                       rs           apps                           true         ReplicaSet
statefulsets                      sts          apps                           true         StatefulSet
tokenreviews                                   authentication.k8s.io          false        TokenReview
localsubjectaccessreviews                      authorization.k8s.io           true         LocalSubjectAccessReview
selfsubjectaccessreviews                       authorization.k8s.io           false        SelfSubjectAccessReview
selfsubjectrulesreviews                        authorization.k8s.io           false        SelfSubjectRulesReview
subjectaccessreviews                           authorization.k8s.io           false        SubjectAccessReview
horizontalpodautoscalers          hpa          autoscaling                    true         HorizontalPodAutoscaler
cronjobs                          cj           batch                          true         CronJob
jobs                                           batch                          true         Job
certificatesigningrequests        csr          certificates.k8s.io            false        CertificateSigningRequest
stacks                                         compose.docker.com             true         Stack
leases                                         coordination.k8s.io            true         Lease
events                            ev           events.k8s.io                  true         Event
daemonsets                        ds           extensions                     true         DaemonSet
deployments                       deploy       extensions                     true         Deployment
ingresses                         ing          extensions                     true         Ingress
networkpolicies                   netpol       extensions                     true         NetworkPolicy
podsecuritypolicies               psp          extensions                     false        PodSecurityPolicy
replicasets                       rs           extensions                     true         ReplicaSet
ingresses                         ing          networking.k8s.io              true         Ingress
networkpolicies                   netpol       networking.k8s.io              true         NetworkPolicy
runtimeclasses                                 node.k8s.io                    false        RuntimeClass
poddisruptionbudgets              pdb          policy                         true         PodDisruptionBudget
podsecuritypolicies               psp          policy                         false        PodSecurityPolicy
clusterrolebindings                            rbac.authorization.k8s.io      false        ClusterRoleBinding
clusterroles                                   rbac.authorization.k8s.io      false        ClusterRole
rolebindings                                   rbac.authorization.k8s.io      true         RoleBinding
roles                                          rbac.authorization.k8s.io      true         Role
priorityclasses                   pc           scheduling.k8s.io              false        PriorityClass
csidrivers                                     storage.k8s.io                 false        CSIDriver
csinodes                                       storage.k8s.io                 false        CSINode
storageclasses                    sc           storage.k8s.io                 false        StorageClass
volumeattachments                              storage.k8s.io                 false        VolumeAttachment

Names

https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#names

All objects in the Kubernetes REST API are unambiguously identified by a name and a UID.

When a resource is created, the desired name is specified in the metadata.name manifest field. The name of the resource is used as part of resource URL, such as "/api/v1/pods/my-pod", so the name must respect constraints common to DNS names. There are three sub-categories of constrains a resource name should comply with:

DNS Subdomain Names

https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-subdomain-names

Most resource types require a name that can be used as a DNS subdomain name as defined in RFC 1123:

  • contains no more than 253 characters
  • contains only lowercase alphanumeric characters, '-' or '.'
  • starts with an alphanumeric character
  • ends with an alphanumeric character

DNS Label Names

https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#dns-label-names

Some resource types require that their name follows the DNS label standard, as defined in RFC 1123:

  • contains at most 63 characters
  • contains only lowercase alphanumeric characters or '-'
  • starts with an alphanumeric character
  • ends with an alphanumeric character

Path Segment Names

https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#path-segment-names

UIDs

https://kubernetes.io/docs/concepts/overview/working-with-objects/names/#uids

Resource Manifests

Kubernetes Manifests