[root@k8s-master src]# kubectl --help
kubectl controls the Kubernetes cluster manager.
Find more information at:
https://kubernetes.io/docs/reference/kubectl/overview/
Basic Commands (Beginner):
create Create a resource from a file or from stdin.
expose Take a replication controller, service, deployment or pod and
expose it as a new Kubernetes Service
run Run a particular image on the cluster
set Set specific features on objects
Basic Commands (Intermediate):
explain Documentation of resources
get Display one or many resources
edit Edit a resource on the server
delete Delete resources by filenames, stdin, resources and names, or
by resources and label selector
Deploy Commands:
rollout Manage the rollout of a resource
scale Set a new size for a Deployment, ReplicaSet, Replication
Controller, or Job
autoscale Auto-scale a Deployment, ReplicaSet, or ReplicationController
Cluster Management Commands:
certificate Modify certificate resources.
cluster-info Display cluster info
top Display Resource (CPU/Memory/Storage) usage.
cordon Mark node as unschedulable
uncordon Mark node as schedulable
drain Drain node in preparation for maintenance
taint Update the taints on one or more nodes
Troubleshooting and Debugging Commands:
describe Show details of a specific resource or group of resources
logs Print the logs for a container in a pod
attach Attach to a running container
exec Execute a command in a container
port-forward Forward one or more local ports to a pod
proxy Run a proxy to the Kubernetes API server
cp Copy files and directories to and from containers.
auth Inspect authorization
Advanced Commands:
diff Diff live version against would-be applied version
apply Apply a configuration to a resource by filename or stdin
patch Update field(s) of a resource using strategic merge patch
replace Replace a resource by filename or stdin
wait Experimental: Wait for a specific condition on one or many
resources.
convert Convert config files between different API versions
kustomize Build a kustomization target from a directory or a remote url.
Settings Commands:
label Update the labels on a resource
annotate Update the annotations on a resource
completion Output shell completion code for the specified shell (bash or
zsh)
Other Commands:
api-resources Print the supported API resources on the server
api-versions Print the supported API versions on the server, in the form of
"group/version"
config Modify kubeconfig files
plugin Provides utilities for interacting with plugins.
version Print the client and server version information
Usage:
kubectl [flags] [options]
Use "kubectl <command> --help" for more information about a given command.
Use "kubectl options" for a list of global command-line options (applies to all
commands).
[root@k8s-master src]# kubectl create deployment web2 --image=nginx
deployment.apps/web2 created
[root@k8s-master src]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-86c57db685-wpkxv 1/1 Running 0 3h24m
web2-6884cc5665-qr9bh 1/1 Running 0 7s
[root@k8s-master src]# kubectl create deployment web2 --image=nginx
deployment.apps/web2 created
[root@k8s-master src]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-86c57db685-wpkxv 1/1 Running 0 3h24m
web2-6884cc5665-qr9bh 1/1 Running 0 7s
[root@k8s-master src]# docker pull nginx
Using default tag: latest
latest: Pulling from library/nginx
bc51dd8edc1b: Pulling fs layer
66ba67045f57: Pulling fs layer
bf317aa10aa5: Pulling fs layer
latest: Pulling from library/nginx
bc51dd8edc1b: Pull complete
66ba67045f57: Pull complete
bf317aa10aa5: Pull complete
Digest: sha256:ad5552c786f128e389a0263104ae39f3d3c7895579d45ae716f528185b36bc6f
Status: Downloaded newer image for nginx:latest
docker.io/library/nginx:latest
[root@k8s-master src]# kubectl create service nodeport web-service --tcp=80:80
service/web-service created
[root@k8s-master src]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.1.0.1 <none> 443/TCP 8h
nginx NodePort 10.1.131.49 <none> 80:32232/TCP 8h
web-service NodePort 10.1.79.198 <none> 80:31485/TCP 20s
[root@k8s-master src]# kubectl get ep
NAME ENDPOINTS AGE
kubernetes 192.168.1.111:6443 8h
nginx 10.244.2.2:80 8h
web-service <none> 28s
[root@k8s-master src]# kubectl expose deployment web2 --port=80 --target-port=80 --type=NodePort
service/web2 exposed
[root@k8s-master src]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.1.0.1 <none> 443/TCP 8h
nginx NodePort 10.1.131.49 <none> 80:32232/TCP 8h
web-service NodePort 10.1.79.198 <none> 80:31485/TCP 2m40s
web2 NodePort 10.1.238.100 <none> 80:30634/TCP 13s
