k8s 基础命令
1. 查看所有api资源
kubectl api-resources
NAME资源名称
SHORTNAMES资源简写
APIGROUPapi组
NAMESPACED命名空间
KIND分类
[root@k8s-master ~]# kubectl api-resources
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
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
leases coordination.k8s.io true Lease
bgpconfigurations crd.projectcalico.org false BGPConfiguration
bgppeers crd.projectcalico.org false BGPPeer
blockaffinities crd.projectcalico.org false BlockAffinity
clusterinformations crd.projectcalico.org false ClusterInformation
felixconfigurations crd.projectcalico.org false FelixConfiguration
globalnetworkpolicies crd.projectcalico.org false GlobalNetworkPolicy
globalnetworksets crd.projectcalico.org false GlobalNetworkSet
hostendpoints crd.projectcalico.org false HostEndpoint
ipamblocks crd.projectcalico.org false IPAMBlock
ipamconfigs crd.projectcalico.org false IPAMConfig
ipamhandles crd.projectcalico.org false IPAMHandle
ippools crd.projectcalico.org false IPPool
kubecontrollersconfigurations crd.projectcalico.org false KubeControllersConfiguration
networkpolicies crd.projectcalico.org true NetworkPolicy
networksets crd.projectcalico.org true NetworkSet
endpointslices discovery.k8s.io true EndpointSlice
events ev events.k8s.io true Event
ingresses ing extensions true Ingress
ingressclasses networking.k8s.io false IngressClass
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
2. namespace(命名空间)
- 所有NAMESPACED的资源，在创建的时候都需要指定namespace，若不指定，默认会在default命名空间下
- 相同namespace下的同类资源不可以重名，不同类型的资源可以重名
- 不同namespace下的同类资源可以重名
#查看namespace
[root@k8s-master ~]# kubectl get namespace
NAME STATUS AGE
default Active 38m
kube-node-lease Active 38m
kube-public Active 38m
kube-system Active 38m
#创建namespace
[root@k8s-master ~]# kubectl create namespace test
namespace/test created
[root@k8s-master ~]#
#删除namespace
[root@k8s-master ~]# kubectl delete namespace test
namespace "test" deleted
[root@k8s-master ~]# kubectl get namespace
NAME STATUS AGE
default Active 48m
kube-node-lease Active 48m
kube-public Active 48m
kube-system Active 48m
3.pod
docker调度的是容器，在k8s集群中，最小的调度单元是Pod，一个pod中可以运行多个容器。
创建nginx pod nginx.yaml
apiVersion: v1 #指定api版本
kind: Pod #指定资源名称
metadata: #定义资源的元数据信息
name: nginx #
namespace: nginx #命名空间，需要提前创建
labels: #标签
component: nginx #标签名称
spec:
containers:
- name: nginx #pod名称
image: nginx:1.22.0 #镜像地址
ports:
- containerPort: 80 #pod内部容器的端口
创建pod
kubectl create -f nginx.yaml
#查看pod详细信息
kubectl -n nginx get pods
#查看pod调度节点及pod_ip
kubectl -n nginx get pods -o wide
#查看完整的yaml
kubectl -n nginx get pods -o yaml
#查看事件
kubectl -n nginx describe pods nginx
#根据文件删除
$ kubectl delete -f nginx.yaml
#根据pod_name删除test
$ kubectl -n nginx delete pod nginx
