如何在 kubernetes 中切换命名空间 [英] How to switch namespace in kubernetes

问题描述

比如说，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来自特定命名空间的所有 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以列出来自相应命名空间的对象.有没有办法在不显式包含命名空间的情况下设置特定的命名空间和列表对象?

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命名空间

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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