Objects and instances

$ kubectl delete deployments/my-nginx services/my-nginx-svc

$ kubectl delete deployment,services -l app=nginx
deployment.apps "my-nginx" deleted
service "my-nginx-svc" deleted

pod

kubectl -n testns get pod -o wide
kubectl -n testns get pod testpod -o yaml
kubectl -n testns describe pod testpod
kubectl -n testns logs --tail=50 testpod 
kubectl -n testns delete pod testpod --force=true --period=0

config

kubectl config current-context
kubectl config set-context $(kubectl config current-context) --namespace="mydefault"
kubectl config view
kubectl config set-context $(kubectl config current-context) --namespace=""

cronjob

kubectl get jobs --all-namespaces
kubectl  -n testns get quota -o yaml

kubectl get cronjob --all-namespaces
kubectl  -n testns get cronjob
kubectl  -n testns get jobs

controllermanager

kubectl -n testns get cm testcm -o yaml

node

kubectl get nodes
kubectl describe nodetest
kubectl get nodes --show-labels

rolling update a deployment

  • Note:

    A Deployment’s rollout is triggered if and only if the Deployment’s pod template (that is, .spec.template) is changed, for example if the labels or container images of the template are updated. Other updates, such as scaling the Deployment, do not trigger a rollout.

kubectl set image deploy frontend php-redis=gcr.io/google-samples/gb-frontend:v3 --record

kubectl get rs -w
kubectl rollout pause deploy/frontend
kubectl rollout resume deployment/review-demo --namespace=scm
kubectl rollout undo deploy frontend --to-revision=7

// deployment/depName
kubectl rollout status deployment/review-demo  --namespace=scm
kubectl describe deployment/review-demo  --namespace=scm
// deployment depName
kubectl rollout status deployments review-demo --namespace=scm
kubectl describe deployments review-demo  --namespace=scm

some commands about minikube and ip

minikube start --vm-driver=none
minikube dashboard --url
cat /proc/sys/net/ipv4/ip_forward
vim /etc/sysctl.conf
sysctl -p
iptables -t nat -A POSTROUTING -j MASQUERADE
ip a | grep 192
cat .kube/config
ip  link show
ip link show if5
ip link show docker0
brctl show
iptables -L
brctl show
docker network ls
brctl show docker0
ping 172.17.0.2
docker network --help
docker network inspect docker0
brctl showmacs docker0