API 对象 #

NAME                              SHORTNAMES   APIGROUP                       NAMESPACED   KIND
bindings                                                                      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                                         true         Service
initializerconfigurations                      admissionregistration.k8s.io   false        InitializerConfiguration
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
auditsinks                                     auditregistration.k8s.io       false        AuditSink
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
adapters                                       config.istio.io                true         adapter
attributemanifests                             config.istio.io                true         attributemanifest
handlers                                       config.istio.io                true         handler
httpapispecbindings                            config.istio.io                true         HTTPAPISpecBinding
httpapispecs                                   config.istio.io                true         HTTPAPISpec
instances                                      config.istio.io                true         instance
quotaspecbindings                              config.istio.io                true         QuotaSpecBinding
quotaspecs                                     config.istio.io                true         QuotaSpec
rules                                          config.istio.io                true         rule
templates                                      config.istio.io                true         template
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
istiooperators                    iop          install.istio.io               true         IstioOperator
destinationrules                  dr           networking.istio.io            true         DestinationRule
envoyfilters                                   networking.istio.io            true         EnvoyFilter
gateways                          gw           networking.istio.io            true         Gateway
serviceentries                    se           networking.istio.io            true         ServiceEntry
sidecars                                       networking.istio.io            true         Sidecar
virtualservices                   vs           networking.istio.io            true         VirtualService
workloadentries                   we           networking.istio.io            true         WorkloadEntry
networkpolicies                   netpol       networking.k8s.io              true         NetworkPolicy
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
clusterrbacconfigs                             rbac.istio.io                  false        ClusterRbacConfig
rbacconfigs                                    rbac.istio.io                  true         RbacConfig
servicerolebindings                            rbac.istio.io                  true         ServiceRoleBinding
serviceroles                                   rbac.istio.io                  true         ServiceRole
priorityclasses                   pc           scheduling.k8s.io              false        PriorityClass
authorizationpolicies                          security.istio.io              true         AuthorizationPolicy
peerauthentications               pa           security.istio.io              true         PeerAuthentication
requestauthentications            ra           security.istio.io              true         RequestAuthentication
podpresets                                     settings.k8s.io                true         PodPreset
storageclasses                    sc           storage.k8s.io                 false        StorageClass
volumeattachments                              storage.k8s.io                 false        VolumeAttachment

声明式 API #

提交一个定义好的 API 对象来 “声明”
启动一个对应的控制器进行调谐 / 编排

控制器 #

一个 Kubernetes 的控制器，实际上就是一个死循环：

不断地获取 “实际状态”，
然后与 “期望状态” 作对比，
并以此为依据决定下一步的操作

workload #

Kubernetes divides workloads into different types. The most popular types supported by Kubernetes are:

Deployments
StatefulSets
DaemonSets
Jobs
CronJobs

参考：

Kubernetes Workloads and Pods

API Resource #

Deployment #

metadata
- name
spec
- replicas
- selector
  - matchLabels
    - app
    - version
- template
  - metadata
    - annotations
    - labels
      - app
      - version
  - spec
    - serviceAccountName
    - containers
      - name
      - image
      - imagePullPolicy
      - ports
        
        name
        
        containerPort

Service #

metadata
- name
- labels
  - app
spec
- ports
  - name
  - port
  - targetPort
- selector
  - app

CustomResourceDefinition #

metadata
- name
spec
- group
- version
- names
  - kind
  - plural
- scope