如何在kubernetes中切换名称空间 [英] How to switch namespace in kubernetes

问题描述

说，我有两个命名空间k8s-app1和k8s-app2

Say, I have two namespaces k8s-app1 and k8s-app2

我可以使用以下命令列出特定命名空间中的所有Pod

I can list all pods from specific namespace using the below command

kubectl get pods -n <namespace>

我们需要将命名空间附加到所有命令中，以列出各个命名空间中的对象.有没有一种方法可以设置特定的名称空间和列出对象，而无需显式地包括名称空间?

We need to append namespace to all commands to list objects from the respective namespaces. Is there a way to set specific namespace and list objects without including the namespace explicitly?

推荐答案

我能够使用以下步骤切换名称空间

I was able to switch namespace using the below steps

kubectl config set-context $(kubectl config current-context) --namespace=<namespace>
kubectl config view | grep namespace
kubectl get pods

这就是我测试的方式

# Create namespaces k8s-app1, k8s-app2 and k8s-app3
master $ kubectl create ns k8s-app1
namespace/k8s-app1 created
master $ kubectl create ns k8s-app2
namespace/k8s-app2 created
master $ kubectl create ns k8s-app3
namespace/k8s-app3 created

# Create Service Account app1-sa in k8s-app1
# Service Account app2-sa in k8s-app2
# Service Account app3-sa in k8s-app3
master $ kubectl create sa app1-sa -n k8s-app1
serviceaccount/app1-sa created
master $ kubectl create sa app2-sa -n k8s-app2
serviceaccount/app2-sa created
master $ kubectl create sa app3-sa -n k8s-app3
serviceaccount/app3-sa created

# Switch namespace
master $ kubectl config set-context $(kubectl config current-context) --namespace=k8s-app1
Context "kubernetes-admin@kubernetes" modified.
master $ kubectl config view | grep namespace
    namespace: k8s-app1
master $ kubectl get sa
NAME      SECRETS   AGE
app1-sa   1         1m
default   1         6m
master $
master $ kubectl config set-context $(kubectl config current-context) --namespace=k8s-app2
Context "kubernetes-admin@kubernetes" modified.
master $ kubectl get sa
NAME      SECRETS   AGE
app2-sa   1         2m
default   1         7m
master $
master $ kubectl config set-context $(kubectl config current-context) --namespace=k8s-app3
Context "kubernetes-admin@kubernetes" modified.
master $ kubectl get sa
NAME      SECRETS   AGE
app3-sa   1         2m
default   1         7m

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