Kubernetes Helper Script - Quickly bash into any environment without having to copy-and-paste namespace names or pod names.

kubehelper.sh

#!/bin/bash

# Created by the award-winning Rick Peacock, genericised and extended by James Sheasby Thomas.

#!Usage: ''$ ./kubehelper.sh' then follow prompts.

#! Ensure you have a context set, or hardcode '--context=[yourcontext]' into the kubectl commands in this script.

set -e -o pipefail

echo "Desired namespace (partial match is fine):"

read -r PREFIX

NAMESPACES=$(kubectl get namespaces | grep ^"$PREFIX" | grep Active | awk '{ print $1 }')

if [ -z "$NAMESPACES" ]; then echo "Couldn't find any matching namespaces, please check your prefix is correct or run 'kubectl get namespaces'" && exit 0;fi

 echo "Enter the number of your required namespace or q to quit:"

select NAMESPACE in "Quit" $NAMESPACES
do
    if [[ "$NAMESPACE" = "Quit" ]]; then exit 0; fi
    break
done

echo "Selected namespace: $NAMESPACE"

PODS=$(kubectl --namespace="$NAMESPACE" get pods | grep Running | awk '{ print $1 }')

if [ -z "$PODS" ]; then echo "Couldn't find any running pods, please check the environment's health or run 'kubectl --namespace==$NAMESPACE get pods'" && exit 0;fi

echo "Enter the number of the required pod or q to quit:"

select POD in "Quit" $PODS
do
    if [[ "$POD" = "Quit" ]]; then exit 0; fi
    break
done

CONTAINERS=$(kubectl --namespace="$NAMESPACE" get pods $POD -o jsonpath='{.spec.containers[*].name}')

if [ -z "$CONTAINERS" ]; then echo "Couldn't find any running containers, please check the environment's health or run 'kubectl --namespace="$NAMESPACE" --pod=$POD get containers'" && exit 0;fi

echo "Enter the number of the required container or q to quit:"

select CONTAINER in "Quit" $CONTAINERS
do
    if [[ "$CONTAINER" = "Quit" ]]; then exit 0; fi
    break
done

echo "Connecting to $CONTAINER in pod: $POD"

# This command will fail if your chosen container does not come with a shell (common with Go services).

# If you know that the containers you're working with have Bash on them, you can change /bin/sh to /bin/bash

kubectl --namespace="$NAMESPACE" exec -it "$POD" --container=$CONTAINER -- /bin/sh