kctn.sh

#!/bin/bash
#
SCRIPT_PATH="$( cd -- "$(dirname "$0")" >/dev/null 2>&1 ; pwd -P )"

IS_NAMESPACED_IDENTIFIED=false
NAMESPACE=""
IS_POD_IDENTIFIED=false
POD=""

while getopts "N:n:P:p:" opt; do
    case "${opt}" in
        n) # fuzzy search for namespace if not identified
            NAMESPACE_KEYWORD="$OPTARG"
            ;;
        N) # set the namespace
            NAMESPACE="$OPTARG"
            ;;
        p)
            POD_KEYWORD="$OPTARG"
            ;;
        P)
            POD="$OPTARG"
            ;;
    esac
done

if [[ -z "$NAMESPACE" ]]
then
    NAMESPACE=$("$SCRIPT_PATH/kns.sh" "$NAMESPACE_KEYWORD")
fi

if [[ $? -ne 0 ]]
then
    exit 1 # Namespace not found
fi

if [[ -z "$POD" ]]
then
    POD=$("$SCRIPT_PATH/kpod.sh" -n "$NAMESPACE" "$POD_KEYWORD")
fi

if [[ $? -ne 0 ]]
then
    exit 1 # Pod not found
fi

CONTAINER_KEYWORD=${!OPTIND}

if [ -z "$CONTAINER_KEYWORD" ]
then
    kubectl get pods "$POD" -n "$NAMESPACE" -o jsonpath='{range .spec.containers[*]}{.name}{"\n"}' \
        | awk NF | fzf --height=40% --border --reverse -1 --header="Select container:"
else
    FOUND_CONTAINERS=$(kubectl get pods "$POD" -n "$NAMESPACE" -o jsonpath='{range .spec.containers[*]}{.name}{"\n"}' \
        | awk NF | fzf --filter "$CONTAINER_KEYWORD") || exit 1

    CONTAINERS=($FOUND_CONTAINERS)
    echo "${CONTAINERS[0]}"
fi