Interactive Bash Script for Quick Kubernetes Pod Access

This Bash script provides an interactive way to access a Kubernetes pod's terminal.

It first checks whether the

kubectl

command is available; if not, it prints an error and exits. It then verifies that the user's kubeconfig file (

~/.kube/config

) exists, prompting the user to obtain it from operations if missing.

The script prompts the user to choose a namespace (test or stg) and sets the corresponding namespace variable. It asks for a keyword to filter pods, lists matching pods, and asks the user to paste the full pod name.

Next, it asks the user to select a shell (bash or sh) and executes

kubectl exec -it

with the chosen namespace, pod name, and shell. If the user enters an invalid option, the script displays an error message.

All user prompts and conditional logic are implemented with

read -p

,

case

statements, and

if

checks.

Full script:

#!/bin/bash

which kubectl > /dev/null 2>&1

if [ $? != 0 ];then

echo "kubelet工具未安装，请先安装！！"

exit

fi

if [ ! -f ~/.kube/config ];then

echo "当前用户家目录下没有k8s集群配置文件.kube/config，请联系运维获取配置！"

exit

fi

read -p $'请选择要操作的命名空间：\n1: test \n2: stg：\n' NAMESPACE

case $NAMESPACE in

1)

NAMESPACE=zzmed-test

;;

2)

NAMESPACE=zzmed-stg

;;

*)

echo "请选择正确的命名空间1：test 2：stg"

;;

esac

read -p $'请输入要操作POD的关键字：\n' POD

kubectl get pods -n $NAMESPACE -owide|grep $POD

read -p $'请复制粘贴上方POD的全名，并回车：\n' PODNAME

read -p $'请选择要操作的终端：\n1: bash \n2: sh：\n' BASH

case $BASH in

1)

BASH=bash

;;

2)

BASH=sh

;;

*)

echo "请输入正确的终端1: bash 2: sh"

;;

esac

kubectl exec -it -n $NAMESPACE $PODNAME $BASH