[K8S] 쿠버네티스 - k3s 명령어

Kubernetes 리소스 조회

# 리소스 조회
kubectl get namespace
kubectl get node
kubectl get pod

master@master:~$ kubectl get namespace
kubectl get node
kubectl get podNAME              STATUS   AGE
kube-system       Active   73m
default           Active   73m
kube-public       Active   73m
kube-node-lease   Active   73m
master@master:~$ kubectl get node
NAME     STATUS   ROLES    AGE   VERSION
master   Ready    master   73m   v1.17.4+k3s1
master@master:~$ kubectl get pod
NAME         READY   STATUS    RESTARTS   AGE
jinsunginx   1/1     Running   0          16m
master@master:~$

 

 

Kubernetes 모든 리소스 조회

# 클러스터에 모든 리소스 조회
master@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
endpointslices                                 discovery.k8s.io               true         EndpointSlice
events                            ev           events.k8s.io                  true         Event
ingresses                         ing          extensions                     true         Ingress
helmcharts                                     helm.cattle.io                 true         HelmChart
addons                                         k3s.cattle.io                  true         Addon
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
master@master:~$

 

 

 

자동완성 명령어

# 자동완성 기능
master@master:~$ echo "source <(kubectl completion bash)" >> ~/.bashrc
master@master:~$ source ~/.bashrc

 

 

사용자 인증 파일 확인

# kubectl 명령을 이용하여 확인
master@master:~$ kubectl config view
apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: DATA+OMITTED
    server: https://127.0.0.1:6443
  name: default
contexts:
- context:
    cluster: default
    user: default
  name: default
current-context: default
kind: Config
preferences: {}
users:
- name: default
  user:
    password: 4275a8b14f67fb2159b6a7f88facc091
    username: admin
master@master:~$ 



# master node가 가지고 있는 config파일로 확인
master@master:~$ cat ~/.kube/config
apiVersion: v1
clusters:
- cluster:
    certificate-authority-data: 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
    server: https://127.0.0.1:6443
  name: default
contexts:
- context:
    cluster: default
    user: default
  name: default
current-context: default
kind: Config
preferences: {}
users:
- name: default
  user:
    password: 4275a8b14f67fb2159b6a7f88facc091
    username: admin
master@master:~$

 

 

 

클러스터 상태 확인

# Cluster 상태 확인
master@master:~$ kubectl cluster-info
Kubernetes master is running at https://127.0.0.1:6443
CoreDNS is running at https://127.0.0.1:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
master@master:~$

 

 

 

 

 

참고자료

https://kubernetes.io/ko/docs/reference/kubectl/cheatsheet/